Access the Green Homes Grant through Cosy Homes Oxfordshire

At the end of September 2020 the UK Government is opening their Green Homes Grant scheme, offering homeowners and landlords vouchers which cover two-thirds of the cost of undertaking energy efficiency retrofit improvements, up to £5,000 (or £10,000 for low income households).

Cosy Homes Oxfordshire can help you maximise the value of your Green Homes Grant.

We offer a whole house retrofit service, meaning we assess your home from top to bottom and offer you expert advice on which energy efficiency measures will make the biggest difference for your home – improving comfort, reducing energy bills, and increasing the long-term value of your home. This information is presented to you as a bespoke Whole House Plan written by your assigned expert Retrofit Coordinator.

And, for the duration of the Green Homes Grant (until 31 March 2021), your Retrofit Coordinator will also use the Whole House Plan to advise you on how best to access the voucher scheme to part-pay for improvements. This includes which measures will provide the most value for money, largest carbon savings, and best security for the investment you’re making on your home. If you chose to go ahead, we’ll guide you through the whole process of home retrofit, and make sure you know when and how to apply for your Green Homes Grant voucher.

How do I find TrustMark registered contractors to do the work?

The Government has specified that all tradespeople and building contractors who deliver retrofit work through the Green Homes Grant voucher scheme must be TrustMark or MCS certified in order to guarantee the quality of the delivery.

But how do you choose who to contact? Put your postcode into the TrustMark website and you’ll find hundreds of builders, electricians, bathroom installers and so on who are working in your area.  Trying to figure out which one of those is the right person to choose for your home improvement project can be very overwhelming. We can help with that, making sure you always get the right contractor for the job.

Quality assurance has always been at the heart of our Cosy Homes Oxfordshire service, and over the last 18 months we’ve been going through a rigorous selection process and building up our network of trusted building contractors and suppliers in Oxfordshire. We already work with local contractors on retrofit projects in Oxfordshire who are TrustMark or MCS certified – and we can help you access them with no hassle for you.

As part of our standard service, we gather quotes from multiple trusted contractors for you –there’s no need for you to spend your time emailing and phoning round contractors to gather quotes. So, by working with us on your home retrofit, you can be confident that you’re already meeting the TrustMark requirements of the Green Homes Grant.

And we go even further. Not only are our contractors TrustMark registered, they’re also members of the RetrofitWorks cooperative – one of our project partners – which is an approved Scheme Provider for TrustMark. They’re leading the way to improve the quality of retrofit work in UK homes, even partnering with the Federation of Master Builders (FMB) to encourage builders down this trusted route.

Plus, every home that we work with is assigned an expert Retrofit Coordinator who is responsible for managing the delivery of works and checking their quality after install.

Use our Plan Builder (coming soon)


Get a quick overview of the opportunities for reducing carbon and running costs for your home with the Cosy Homes Oxfordshire Plan Builder.

Register your home

Register your home with us and we’ll be in touch to book in a home assessment and start your home retrofit journey

Register your home

Frequently asked questions

What measures does the Green Homes Grant cover?

There are two categories of improvements: primary and secondary measures. You are able to apply for a voucher to install one or more of the following ‘primary’ measures:

  • Solid wall insulation, cavity wall insulation, under-floor insulation or roof insulation (including loft, flat roof and room-in-roof) and park home insulation
  • Air source heat pump or ground source heat pump
  • Solar thermal heating

As long as you are installing one or more primary measures, you can also use your voucher for one or more improvement on the ‘secondary measures’ list.  The cost of the secondary measure cannot be greater than the cost of the primary measure:

  • Draught-proofing
  • Replacing single glazing with double/triple glazing or installing secondary glazing
  • Upgrading doors (installed before 2002) with energy efficient replacements
  • Hot water tank insulation
  • A range of heating controls – including hot water tank thermostats, thermostatic radiator valves and smart heating controls.

We know this list can be a little overwhelming, and it’s hard to know where to start. Every home is different, but through our home assessment and Whole House Plan service, we can help you to understand which of these measures makes sense for your home – as well as making sure the measures are designed and installed correctly to avoid issues later down the line.

If I want to use the Green Homes Grant to make stand alone improvements to my home, but I do not want a Whole House Plan, what is the best approach?

Cosy Homes Oxfordshire is not always the right route for everyone.

Our focus is on a whole house retrofit approach, assessing a house in its entirety with the aim of producing bespoke and comprehensive recommendations to make that home as energy efficient as possible, likely including several different measures and areas of improvement. These can be split up into several phases of work, and if you do choose to work with us we’ll ensure that the first phase of work is set up to maximise the potential of the Green Homes Grant – within the context of the overall plan. This approach ensures a home is made as energy efficient as possible. It also avoids issues later down the line where individual measures have been installed without considering how they work in the house as a whole. So, we’d always recommend coming to us for a home assessment and Whole House Plan initially, to ensure you have all the information you need. We can then help you to put this plan into place and remove all the hassle from the project.

However, if you’re looking to undertake smaller retrofit improvements to your home, it may be more cost-effective to manage the project and source contractors yourself. We can also only work with homeowners in Oxfordshire (or close by) currently. However, we want to stress that it’s always best to use the whole house approach to retrofit. If you do choose to undergo a retrofit yourself or install a single measure, make sure you bear in mind that by taking this approach – unless you are an expert in energy use in residential buildings yourself – you are likely compromising the best long-term energy solutions for your home.

You can find out more information and find local contractors near you to deliver the work by heading over to the Simple Energy Advice website

Who can I contact if I have an additional question?

If you have a question about the Green Homes Grant and how to access it through Cosy Homes Oxfordshire that we haven’t answered on this page, please get in touch with us by email to or by phone 0300 303 1269 (open Mon-Fri, 9am-5pm, closed bank holidays).

Register your home to get started