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The Green Deal Mythbuster

Full help incl Home Improvement Fund

GREEN DEAL FUNDING TO END - BUT SOME CASHBACK IS STILL AVAILABLE. On 23 Jul 2015 the Government announced it is to stop funding the Green Deal.

  • The Green Deal Finance Company, which administers the scheme, is now not accepting any new loan applications.
  • Applications for loans made before 3.30pm on Thu 23 Jul will be processed as normal, so long as there are no large errors in them which may change the application.
  • Existing Green Deal loans are NOT affected and will continue to be repaid as normal.
  • Applications for cash from the Green Deal Home Improvement Fund - which is separate and not administered by the Green Deal Finance Company - will close on 30 Sep 2015 or when the remaining £4m funding runs out, whichever is sooner.
  • The Energy Company Obligations (ECO) scheme, which was launched alongside the Green Deal and gives grants to low-income households and people living in older properties, will continue to run until Mar 2017 - its future after that is under review.

For more info see the Government pulls plug on Green Deal funding MSE news story. This guide will be fully updated with more information shortly.

It's called the Green Deal. But in reality, it's a way of paying for the cost of double glazing, solid wall insulation, boiler upgrades and much more from the projected savings you'll make on energy bills.

It's complex, but for many living in England, Wales & Scotland it could pay off very well. This guide explains how it works, what it's best for, how the Home Improvement Fund works and more.

The Green Deal gives special 'loans' or grants to improve your home to cut energy bills. You needn't be on a low income – anyone can apply

Energy efficiency isn't just about group hugs, sandals and saving the planet. It can save you £100s each year on your gas and electricity bills and, just as importantly, make your home a more pleasant place to live in.

The big idea is that the Green Deal helps you make energy-saving home improvements to your property, and you pay for it using the savings from your energy bills. You also get a snugger home.

You can borrow money to insulate your floor, replace single glazing with double or triple glazing or install cavity wall insulation and much more. Unlike many energy efficiency grants, it's not just for those on lower incomes (though more help's available if you are).

Quick questions:

Can I do the Green Deal if I rent my place?

Can I do the Green Deal if I'm on a prepayment energy meter?

What if I'm in Scotland or Northern Ireland – does it apply?

A note from Martin

The Green Deal was one of the Coalition Government's big ideas. The fact it has a political dimension, by its very nature, means some will say it's the best thing since sliced bread, others that it sups with the devil.

We've tried to ignore that in this guide. The team and I have focused on the practical, financial standpoint: "Is it right for you?" For some, but not all, it is a very powerful deal that should be seriously considered.

Just as in the Student Finance Mythbuster guide, the big fear factor comes from the fact much of the help's couched as an interest-charging loan, enough to frighten the bejeebees out of many people.

Yet if you're debt-averse, don't just ignore it. This could be a great way to make your home a warmer, more energy-efficient place to live without any increased outlay.

In truth, though, frankly I think the deal could've been structured slightly differently, with the same outcome. If no interest was charged, a mythbusting piece like this wouldn't be so necessary.

Yet, of course, there is another element. If it does catch on (the jury's still out), it could help improve the UK's incredibly inefficient housing stock. In the long run, that's our only chance of cheaper energy bills.

It's a debt, Jim, but not as we know it. For many, it won't ever increase their monthly costs

It's been billed as a loan, which will, wrongly, put many people off. Yet it's not a debt in the traditional sense:

  • You pay back only what you're predicted to save on bills each month, so there's no NET cost. If your energy bills are £1,000 a year now, all being well (more on this later), your energy bills PLUS Green Deal repayments (including interest) won't be more than that. So there's no net increase in cost, and your home's more efficient.

  • It credit scores lightly. The credit eligibility criteria are less tough than normal lenders'. So more than 80% of people should get accepted – far more than for a normal loan.

  • Repayments are spread over a long term. The homeowner (that's you, unless you move, when it moves to the new owner) pays the money back over 10 to 25 years.

  • The energy company makes repayments for you. You don't actually repay the loan directly, your energy firm does it for you out of your electricity bills. So, just to hammer it home, that means you should pay at most the same as you do now, until the loan's paid off – then you'll feel the big benefit.

Quick question:

What happens if I get into financial difficulties on my energy bills?

You should never have to repay more than you 'save' in reduced energy bills

This is the most important thing to understand. So let's labour it a little bit. You only have to repay what you're predicted to save on your energy bills each month.

Imagine Mr Ivor Coldhome gets loft and cavity wall insulation costing £900. For his three-bed semi, it's estimated this'll knock £160 off his energy bills each year.

Ivor takes a loan for £900 (plus a £63 admin fee) at 10.8% APR. His finance plan means he repays £108 a year for 25 years, after which his loan and interest is fully repaid.

So with £350 cashback for installing home improvements through Green Deal, as his savings are more than his repayments, he's £401 better off in the first year, and £51/year after that.

You repay through your electricity bill. So the idea is that your bills (you may save on gas or oil bills, not necessarily electricity) decrease enough to cover the repayments, so total energy bills stay about the same until the loan's paid off.

Why 'save', not save? Because it's based on nominal, not real, savings

In a perfect world, the saving would be based on the actual reduction in your energy bill thanks to the improvements. Yet that's impossible to work out, as so many different factors come into play to affect this.

So the savings figure is based on average savings predictions, incorporating the following factors – though all use typical behaviour, not your own, to make the assessment:

  • What you're having done (eg, a boiler is different to double glazing)
  • Your home's size
  • The average occupancy for your size of home
  • Typical number of rooms not heated
  • Typical hours of heating used
  • Typical thermostat setting
  • What type of heating you're using at the moment
  • What energy saving measures you're using already

Your assessor will work out the average energy saving for a home of your type for that improvement. They'll then compare it to your usage – whether your heating's on for fewer hours, whether you live alone or have a brood of six.

Assessors have been advised to make very conservative estimates of savings, as well as factoring in future energy price rises. This means for most typical energy users, if you do it right, the true saving's likely to be more than the repayments, so you'd be quids in. But if your usage changes, there's a risk it'll go the other way (see point 13).

Check your advice report carefully. It'll tell you your average savings, so compare your energy use to those. It should also say if you're a low user, and could lose out.

The Green Deal can be used for 40+ improvements, from double glazing and boiler upgrades to underfloor heating and loft insulation

Cash is on offer for a plethora of energy-efficiency improvements, a bigger list than under previous schemes.

You could be eligible for one or a combination of the following. The only limit's how many improvements will be useful and if they'll pay for themselves through Green Deal finance.

Cavity wall insulation



Solid wall insulation

New boiler

Heating controls

Loft insulation

Solar panels

Underfloor heating

Many more improvements

Always do a FREE online check before you pay for a Green Deal assessment

Assessments cost money, so before doing it, it's worth finding out if there’s any likelihood of you being eligible for the Green Deal (or Home Improvement Fund).

Free online check

The Green Deal assessor 1 Green Place has a free online check via its home survey tool which will ask you a series of questions about your property (it may be easier to be at home when you do it). Once you've filled out the answers, it will produce a PDF report telling you of potential savings and if it's likely you're eligible for any Green Deal measures, plus any extra subsidies.

It’s important to note this is an assessor's tool. It collects your contact details which it's likely to use to try and get you to take an assessment afterwards, so treat it with a pinch of salt – but it's certainly worth doing first to get a rough idea.

If you’re doing it for the Home Improvement Fund, you'll need to match up which of the improvements it suggests for you are available under the scheme.

Cut the cost of the Green Deal assessment

House survey with tick inside

Green Deal assessments aren't all one price. Assessors must be members of the Green Deal scheme, but there are more than 500 organisations to choose from. Some are nationwide, others are local outfits - search for an assessor near you. The cost varies from £99 to £150, but £120 is typical.

You may also be able to cut costs through your local council. The Government often offers cash that local authorities can apply for to promote the Green Deal in their areas. In the past, this has even resulted in local authorities offering free assessments, so always check if there's an offer available in your area.

Many of the companies doing Green Deal assessments will also be able to install your energy-efficiency measures too. Often these firms will take the assessment fee off the cost of the work if you choose to do it through them. But you're free to pick other companies too, so always compare prices.

Quick questions:

Will the assessor try and sell me something else?

I can't afford the assessment - what do I do?

How do I find a good Green Deal assessor?

An assessor's just cold-called me. Is this legit?

Let us know what you think. Will you be doing the Green Deal? If not, why not? Discuss The Green Deal.

The Home Improvement Fund has now largely run out - but you can still get funding for improvement measures

The 'Home Improvement Fund' was added to the Green Deal in June 2014 to try and kickstart the scheme. It offered cash handouts worth £1,000s to help those in England and Wales improve their home, and as you'd expect, it's proved massively popular.

The Home Improvement Fund is separate to other Green Deal loans and is not administered by the Green Deal Finance Company. Applications to the Home Improvement Fund are still being accepted but will close on 30 Sep 15, or when the remaining £4m has run out – whichever is sooner.

The initial £120m funding ran out in just six weeks. Most of a further £100m released in two parts has now also run out, with the March pot – announced by energy secretary Ed Davey at MSE Towers – going in just 10 days.

There is around £4m still available, which is reserved for other measures such as floor insulation and double-glazing – if you want to apply for that cash, go fast.

What can I get?

There were originally four different streams of funding on offer and you could get £5,600 in total, though funding for solid wall insulation has now run out. Here's how it breaks down:

  • Offer 1: Install two or more of 11 'main' energy saving measures, and get up to £1,250

    To get the full amount you need to install two of these measures, which include flat roof insulation and double glazing, and spend at least £1,250 on parts and labour in the installation. You can claim back 100% of your costs, up to the maximum amount.

    See a full list of the energy saving measures which qualify for the funding

  • 'Add-on' offer 3: Get £100 of your assessment cost refunded

    Pretty straightforward, this one. If you go for the measures recommended in the assessment, you can get up to £100 of your assessment costs refunded.

  • 'Add-on' offer 4: £500 bonus if improving a home bought in the past year

    If you bought your home in the past 12 months, you can get an extra £500. You'll need to have taken advantage of offer 1 or offer 2 (see above) to qualify.

  • NOW CLOSED: Offer 2: Install solid wall insulation, get up to £3,750 back

    Around 6.6 million homes in the UK have solid walls (as opposed to cavity walls). Solid wall insulation's expensive and disruptive to install, but it stops heat escaping and can save up to £455/yr on energy bills (according to the Energy Saving Trust). It usually costs between £4,000-£14,000 – this offer allowed you to claim back 67% of your costs, up to £3,750 max.

    The offer applied to both internal and external solid wall insulation. MSE Wendy took advantage last time: "I'm getting 50m² of solid wall worth £7,100, but I only need to shell out £1,750." (She needed to pay £300ish upfront, and a further £1,450 on Green Deal finance; her Green Deal Home Improvement Fund cash was a massive £5,350!).

How to apply

It's first-come, first-served until the cash runs out, so apply asap. Here's how:

  • Step 1. Get an assessment. You'll need a Green Deal assessment, which typically costs £120, or an Energy Performance Certificate, typically £60-£120 (you may have one if you've recently moved home). If you've an existing assessment or EPC done in the last two years it still stands, assuming your home hasn't changed.

  • Step 2. Get a quote. Once you've agreed on the measures you're going to have installed, you need to get a quote from a Green Deal-registered installer.

  • Step 3. Apply. Once you're ready, go to the Home Improvement Fund website.

Of course, there is the risk that you pay for a Green Deal assessment and then find out you don't qualify for any GDHIF funding. However, at that point, you can always decide to go ahead anyway and you'll still have a warmer home.

Get Martin's Free Money Tips Email!

We’ll let you know each time new Home Improvement Fund cash is released via our weekly email.

If you've got the upfront cash, you can still get the Green Deal without the loan, including 'cashback'. This can be bonza

The loan is designed to help people who don't have the upfront cash to pay for improvements. Green Deal loans run for decades, and the interest costs can soon mount up. If you can pay upfront, you can avoid interest costs and bag the savings yourself.

Overall, it's almost certainly likely to work out better for you if you pay upfront (especially considering poor savings rates right now). But make sure you've done the maths – are you better off going through the Green Deal (with funding contribution, if applicable, minus cost of assessment) than you would be doing the measure outside of the Green Deal?

If you do decide to do the work through a Green Deal provider, make sure you're not overpaying. You've still a got right to haggle with your Green Deal provider, as you would with any other tradespeople.

We've worked up an example of how you could benefit from Green Deal Home Improvement funding while paying upfront for cavity wall insulation and a boiler upgrade, and compared it to getting Green Deal finance.

Paying upfront vs getting Green Deal finance (over 20 years)
Paying upfront Borrowing the cash
Cost of boiler, insulation and labour £2,500 £2,500 (plus £63 admin fee)
APR - 8.6%
Length of time to pay off - 20 years
Repayment*/month - £22
Interest cost - £2,780
Total (re)paid £2,500 £5,280
GDHIF funding £1,000 £1,000
Predicted saving from lower bills* £5,280 £5,280
Total saved over 20 years £2,780 £0
*Assumes savings and repayments are both £22/mth

Don't let the huge numbers put you off unnecessarily

Talk of "borrowing £2,500 and repaying £5,300" may seem very scary. Yet again, it's important to remember, even with this, the whole point is you should not end up paying more than you do now, because the reduction in your energy bill will cover the repayments.

You're also lessening the impact of future energy price rises. Suppose you use 3,300kWh of electricity. You then make Green Deal energy efficiency improvements, meaning you use 15% less electricity - 2,805kWh. If prices rise, you're less affected as you use less energy.

It's also worth noting that, assuming we have overall inflation over the next 20 years, the actual cost to you of repayments is less. As inflation rises, the value of money diminishes, so £1,000 in 20 years' time will buy less than £1,000 now. This diminishes the cost of borrowing – to an extent.

Quick questions:

I don't have the cash upfront, but want to pay off quicker. Can I use other credit?

Should I extend my mortgage to make home improvements?

You borrow over the long term (10–25 years), and there is interest attached

If you choose to get a Green Deal loan, the effective minimum repayment period is 10 years, the maximum 25. The exact length depends on the energy-efficiency improvements you choose.

  • This is unsecured borrowing (better than secured). When you get a loan from a Green Deal provider, you also sign an agreement for unsecured finance. That's better than secured, where they can take your house if you don't repay – here, they can't.

  • The interest varies depending on the amount and length of the loan, so check. Providers charge interest on Green Deal loans. Your Green Deal provider will set up a plan with you, though this will need to be approved by the Green Deal Finance Company – a central body set up to access the money markets and provide cash for the loans.

    The Green Deal Finance Company charges Green Deal providers 6.96% interest to borrow cash from it. They also charge a set-up fee of £63.24, and an annual charge of £18.25 per loan which is usually passed on and is the reason the APR (total cost of credit) that you face varies depending on the length of the loan and amount you borrow.

    Here are some examples of how much you could repay for different improvements (though the Green Deal Finance Company don't recommend finance plans for less than £500 as the interest gets higher the less you borrow, so the first two are just for illustration):

  • You can pay Green Deal loans early without penalty. When the scheme was first set up, there were early repayment charges associated with loans that ran for 15 years or more.

    But the Green Deal Finance Company scrapped these in May 2014, meaning any loan taken out after that date, for any length of time, won't have these charges.

    If you're one of the 2,000 or so people who took out a loan before May 2014, then as these early repayment charges are in your contract with your Green Deal provider, you may still have to pay them if you chose to repay early.

    But the Green Deal Finance Company has said it'll encourage providers not to enforce these charges on anyone repaying early.

Loft insulation (three-bed semi)
Cost of work £350
Predicted annual saving £150
Interest rate 9.1%
Typical payback time 10 years
Monthly repayment (added to electric bill) £4.50
Total interest cost £185
Total repaid £535
You save each year £100
Cavity wall insulation (three-bed semi)
Cost of work £500
Predicted annual saving £145
Interest rate 10.9%
Typical finance payback time 10 years
Monthly repayment (added to electric bill) £7
Total interest cost £325
Total repaid £825
You save each year £60

And one improvement that won't fully pay for itself...

New boiler (three-bed semi)
Cost of work £2,500 (plus £63 admin fee)
Predicted annual saving £200
Amount of finance borrowed £1,363
Your upfront payment at start £1,200
APR 9%
Typical finance payback time 12 years
Monthly repayment (added to electric bill) £15
Total interest cost £870
Total repaid £3,430
You save each year £10 (until repaid)

The Green Deal won't cover pricier repayments' entire cost - you may have to stump up some cash upfront

If an improvement won't pay for itself in energy savings over 10 to 25 years, then you can't borrow the full amount through the scheme. So you'll have to stump up any remainder. Improvements that fully pay for themselves are denoted by a green tick on your assessment, those that only partially do have an orange tick.

Typical areas where you may have to pay

If you go for one of the pricier improvements allowed under the Green Deal – such as solid wall insulation, costing £10,000 or more – the energy you save over 25 years is unlikely to cover the cost.

This is also likely to apply to other more expensive improvements, such as new boilers, double glazing, solar panels, replacement storage heaters and under-floor insulation.

Here, you can only borrow the amount you would save on your bills, and must cough up the rest yourself. So carefully work out if you can afford it beforehand.

There may be help

However, you can be clever here. If you combine a low-cost, high-impact improvement (eg, loft insulation), with a high-cost, average-impact improvement, (eg, boiler), you may be able to use the savings from one to pay for the other. See combining improvements for more.

On a low income, in receipt of benefits? You may be entitled to free Eco cash rather than a loan

You don't always need to borrow. The Energy Company Obligations (ECO) scheme was also launched alongside the Green Deal - it gives grants to help low-income households, people living in older properties and low-income communities.

The big six energy suppliers (British Gas, EDF, E.on, Npower, Scottish Power and SSE) have obligations to help customers by providing cash to help them insulate and better heat their homes.

Don't worry if you're not with the big six. This isn't just about suppliers helping their own customers - these big beasts just put money into the system. Green Deal providers can then bid for it and use it to help any of their customers who are eligible.

There's also cash available for those not on a low income for certain measures - such as for insulation and solid wall insulation. Our Free Insulation & Boilers guide has full information, including eligibility criteria, for free energy-saving home improvements.

Earlier this year we were told about some problems around ECO subsidies, with providers cancelling arranged installations and putting off new customers - so remember that this funding isn't guaranteed. If you've tried to access it, let us know your experience in the discussion forum.

Who's eligible for assistance?

If you earn less than £16,010 household income and own your home, you're likely to be eligible for help. The amount is means-tested. You're likely to get higher amounts if there are ill or disabled people, children or older people living there.

For more info on help with costs and how to apply outside of the Green Deal, call:

  • The Energy Saving Advice Service (England & Wales): 0300 123 1234
  • Home Energy Scotland: 0808 808 2282

How to get assistance under the Green Deal

If you think you're eligible for help, and you want to take part in the Green Deal, discuss this when you get your home assessed for Green Deal improvements.

Talk to your chosen Green Deal provider when you agree a plan. They will contact the energy companies for you, access any discounts you're eligible for, and take this off the total cost of your plan. Ask the provider if they have ECO funding available – it's becoming rarer that many do.

Who is eligible for ECO subsidies?

Solid wall insulation is expensive - but you can get £1,000s of free cash to help

Houses in the UK either have cavity walls or solid walls. Cavity walls are made of two walls with a gap in between and solid walls are single solid walls, usually made of brick or stone. If your house was built after the 1920s it'll probably have cavity walls whereas older houses – some 6.6 million in the UK – will have solid walls.

Unfortunately solid walls are much more expensive to insulate because you need to add material to the outside or inside of a wall. Internal solid wall insulation starts at £3,000 and external solid wall insulation can be as much as £16,000. Fortunately though you can get help – there are two routes you can go down:

  • The Green Deal Home Improvement Fund. It was possible to claim back up to 67% of your solid wall insulation costs, up to a max of £3,750 - though the funding ran out quickly. Full details above in the Home Improvement Fund section.

  • ECO funding. As you read above, the big six energy companies have obligations to provide assistance to people trying to make their homes more energy-efficient. Although much of this cash will go to low-income households for new boilers & insulation, there's also help available for anyone wanting solid wall insulation.

    To find out what you're eligible for under ECO, talk to your assessor when they come round (assuming they recommend your home is suitable for solid wall insulation) or call the Energy Saving Advice Service (England & Wales) on 0300 123 1234 or Home Energy Scotland on 0808 808 2282.

Getting internal solid wall insulation means sacrificing some room space. It can be done by building a fake wall and filling in the gap with insulating mineral wool, or installing insulation boards directly onto the walls. You'll need to remove anything attached to the wall, such as the radiator - plus ensure it's free of damp.

External solid wall insulation is done differently. A layer of insulation material is fixed to the existing walls, and then covered with protective cladding/render, which you can paint, add brick slips to, or even pebble-dash. Because this changes your home's external appearance, you'll need to find out from your local planning authority whether you need permission, and again sort out any damp you have.

If the savings you're predicted to make don't happen, you could pay more than you actually saveJar full of coins

This is a slight wobbler. I wouldn't let it put you off too much, but it is a risk that needs thinking through.

Throughout this guide, we've written "you only repay what you should save", yet technically, that's not always true. The actual savings need to match up with your total repayments.

Imagine Ima MoneySaver is a very low energy user living alone in a large house. If she got a new boiler, the average saving for a home of her type is £190 per year, so this is the figure used to set her repayments. She will pay back £16 a month until both the loan and interest is paid.

However, she's a low user, and that isn't factored in (it's about the home, not the user, as if she moved the next tenant may be a high user). So she might only save £10 a month, because she uses less energy than the average. Therefore there would be a genuine net cost.

Having said that, in time the saving should grow, simply because energy bills are rising so rapidly. If the saving stays at the same proportion, the cash amount would rise, so in a few years' time, she's likely to be saving as much as her repayments, and after that may even make savings over and above her repayments.

All Green Deal assessors will ask to see your energy bills, classify you as a low, medium or high user, and predict your true savings. Your advice report will spell out if it's a good deal for you. Use these figures to work out if it's the right time to make home improvements.

Get at least three quotes for the work and don't be afraid to haggle (you only need one assessment)

Picking a provider can be tricky. You don't need to get the work done by the same company that did the assessment. Many assessors and installers are salesmen – Green Deal double-glazing is still double-glazing!

Get at least three quotes

Once you've got your advice report, that's your assessment done. So now get quotes from at least three Green Deal providers. They will quote for the work and devise a repayment plan (if you don't want to pay upfront).

Never be pressured into signing anything without getting other quotes first.

Don't be afraid to haggle

The installation and fitting industry has often operated by giving sky-high quotes to people, hoping they'll accept them, but being ready to knock them down if they become customers. We've heard of people being quoted £15,000 for double-glazing but eventually getting it for £2,000 – showing the scale of the discounts.

So far the Green Deal is too new for us to know how it will go, but don't be afraid to haggle (please report your Green Deal haggling experiences).

Because this is a scheme based on the market, there are no Government rules on how much things should cost. So, as with any other home improvement, do some research to find out how much you should be paying, then compare quotes.

If you've agreed finance, you don't pay your installer anything

Once you've agreed on a quote, your provider will appoint an installer to do the work agreed under your plan. The whole idea of the Green Deal is that you can make improvements with no upfront cost.

So, any Green Deal installer who tries to charge you anything when they do the work is wrong. It's worth checking when they arrive at your home that they're aware of the payment arrangements, and contacting your plan provider if there's a problem.

Combining improvements can, bizarrely, make Green Deal loans more affordable

The most important thing to understand on this is that you cannot borrow more under the Green Deal loan than what your energy savings will allow you to repay.

Even though you repay the bill through your electricity provider, you are still free to switch provider to cut costs

Energy Club Logo

Repayments are taken from your electricity bill (because not everyone has gas) and will be shown on your statement. Your electricity supplier will repay your loan for you to the company who installed your Green Deal measures to pay off your finance.

Once a year, you'll receive a Green Deal statement from your provider that shows how much you've paid, and how much you still owe. Therefore, you're never shelling any separate cash out (apart from for your electricity bill, obviously).

Yet you are still free to switch

Don't, for heaven's sake, think this locks you into your energy provider so you can't get cheaper bills (join the MSE Cheap Energy Club to stick on permanently low prices).

Provided the energy company is a member of the Green Deal scheme, which all the big six – British Gas, EDF, E.on, Npower, Scottish Power, SSE – are, then you are free to move.

Switching will work no differently than it does now. There's a central Green Deal Plan register, which means energy companies know if you've got a Green Deal Plan when you switch.

If it breaks after the warranty runs out, you may still have to repay

Most Green Deal equipment comes with a five-year warranty for the equipment, and 10 years' warranty for any building damage caused by the installation. Cavity and solid wall insulation have a full 25-year warranty.

Many Green Deal improvements have extremely lengthy repayment periods. So if your new boiler breaks in year eight, its warranty will have expired. You'll need to pay to fix it, but you'll also still have to pay your Green Deal provider each month.

Some Green Deal Plans require you to get annual services on the improvements or risk invalidating the warranty – another thing to check when agreeing a plan. This is a good thing because you'll still have a warranty, but the service will probably cost you.

The Green Deal has STRONG consumer protection rules. If you're given the wrong advice, take it to the Ombudsman

green deal

There's a lot of consumer protection around the Green Deal. Green Deal providers, assessors and installers have all signed up to a Code of Practice, and all Green Deal home improvements should have the Green Deal Quality Mark.

Green Deal assessments in your home are covered by door-to-door selling regulations, which mean you have 14 days to change your mind. Even so, NEVER, EVER sign up to anything on the spot – take your time to think about it.

Some installations may need additional work – eg if you're getting underfloor heating, you may need a joiner to take up/replace the floor, as well as a heating engineer to install the heating pipes or electricals.

The Green Deal Code of Practice requires that any other tradesmen involved who aren't Green Deal Installers are members of other schemes, such as TrustMark.

How to complain

Various ombudsmen and regulatory agencies deal with complaints, though your first port of call should be your provider. If they can't resolve your complaint, contact the Green Deal Ombudsman or, in specific cases, other bodies:

  • Problems with the Green Deal: You can complain to the Green Deal Ombudsman or call on 0330 440 1624.

    The Ombudsman has the power to investigate complaints and decide whether to take action. It can require energy companies to remove charges, or provide a service. They can force providers to give an apologies or explain, and, if appropriate, give up to £25,000 compensation.

    If you accept the Ombudsman's decision, it's binding on you and the company. If you don't accept it, you're free to pursue other redress, for example, through the courts.

    If a service was mis-described, you may want to get your local Trading Standards Institute involved.

  • Problems with energy companies: You can report the energy company to its regulator, Ofgem. It builds cases against energy companies, and fines them for large-scale mis-selling or unfair relationships. If you have a specific complaint, it's best to go to the Green Deal Ombudsman above.

  • Problems with your Green Deal finance contract: If your complaint directly regards the Consumer Credit Act, rather than a company's conduct, you need to seek help from the Financial Ombudsman Service or call it on 0800 023 4567 .

    However, if your complaint is regarding how your repayments are being taken, for example, you should go to the Green Deal Ombudsman.

The Green Deal's a big move. First ensure you're on the cheapest energy tariff and do the energy-saving basics

Ditch and switch energy provider and you can save £100s a year. Our Cheap Energy Club checks you're on the cheapest deal and handles the switch for you. Plus to encourage you, there's usually up to £30 extra if you switch via the club.

It's the same gas, the same electricity, the same safety. All that changes are the customer service and the price you pay.

And every month, without you doing anything, we do a comparison for you, and alert you when it's worth switching again.

Once you've switched, if you wander round the house in boxers or bra 'n' knickers with radiators on full and windows wide open... STOP IT!

Sensible changes can save your large, from draft excluders to setting washing machines to 30°C and low-energy light bulbs to notching down the thermostat. Try the Energy Saving Trust for more energy-saving tips.

Martin's final thought - is it worth it?

That's the mythbusters done, so hopefully you now understand how the scheme works.

Deciding whether it's right for you depends on your home and finances. From a purely financial perspective, provided the Martin Lewis, site founder and editorwork qualifies for full financing, it seems a good bet for those keen to improve their pads who can't afford to shell out upfront for major improvements.

The simple reason for this is that your home will be a nicer, warmer place to live in, even though you won't have to pay out any more than you do now. But if you can afford to shell out upfront, then it's likely better to do this, so you don't pay any interest costs.

For smaller improvements the assessment's cost is proportionately larger, so needs factoring in more. Though, right now, with cashback on top, that should be more than covered, making that simple too.

Those are the easy bits though. We don't know what impact this'll have on house prices, for example. So there is still an element of a gamble.