Interest-Free Energy Efficiency Funding in Wales
The Green Homes Wales scheme is a Welsh Government backed initiative designed to help homeowners in Wales make meaningful energy efficiency improvements to their homes.
Through a combination of interest-free loans, expert retrofit support, and available grant funding, Green Homes Wales removes many of the financial and technical barriers that stop homeowners upgrading their property.
Renewable Heating Wales supports homeowners through the entire process, from early advice and system selection through to installation and guidance on funding applications.
What is the Green Homes Wales Scheme?
Green Homes Wales is delivered by the Development Bank of Wales on behalf of the Welsh Government.
The scheme is designed to support eligible homeowners in improving energy efficiency and reducing carbon emissions, while keeping monthly costs manageable.
Key benefits include:
- Interest-free finance for eligible home energy upgrades
- Fully funded expert retrofit advice
- Optional grant funding alongside loans for specific measures
Interest-Free Loans and Financial Support
Green Homes Wales offers interest-free loans from £1,000 to £25,000, with repayment terms of up to 10 years. For larger or more complex projects, extended terms may be available.
Additional financial features include:
6-month repayment holiday at the start of the loan
Ability to combine loans with grant funding for selected measures
No means testing, although affordability and credit checks apply
Renewable Heating Wales can help you understand which technologies qualify and how best to structure your project.
One of the biggest advantages of Green Homes Wales is access to fully funded professional support.
Eligible homeowners receive:
• A qualified Retrofit Coordinator
• A detailed home assessment
• Clear, tailored recommendations for improving efficiency and decarbonisation
This ensures upgrades are planned holistically, not piecemeal, avoiding common mistakes and improving overall performance.
How the Application Process Works
Step 1 – Initial advice
Contact Nest for free, impartial advice on available support options.
Step 2 – Register interest
Apply for funding for a home assessment by registering your interest with Green Homes Wales.
Step 3 – Review recommendations
Consider your tailored retrofit plan and choose which measures to move forward with.
Step 4 – Install and fund
Apply for funding, install approved measures, and begin benefiting from lower energy costs.
Due to high demand, applications are processed in phases. Renewable Heating Wales can help you prepare in advance so you are ready when funding becomes available.
Who is Eligible?
Homeowner requirements
Not means tested
Must pass affordability and credit checks
Property requirements
Located in Wales
Owner-occupied and your main residence
Not a new build (must be older than 6 months and previously occupied)
Exclusions
Listed buildings are currently not supported
Private landlords are not eligible under this scheme
