Free Insulation Grant Checker UK
Insulation grants help reduce heating bills and improve home comfort. They are commonly available through ECO4, the Great British Insulation Scheme and local authority routes.
Loft insulation
Topping up loft insulation to current standards (around 270mm) is one of the most cost-effective improvements. Many low-income households can have it fitted for free under ECO4 or GBIS.
Cavity wall insulation
Suitable for many homes built between the 1920s and 1990s with an unfilled cavity. A pre-install survey checks suitability and damp risk.
Solid wall insulation
For older homes with no cavity. Internal or external wall insulation can deliver large improvements but is more expensive. Higher grant amounts may be available.
Why EPC matters
Insulation grants typically prioritise homes with an EPC rating of D-G, where impact is greatest. If your rating is unknown, you can still proceed with our checker.
Frequently asked questions
Is loft insulation really free?
For eligible households under ECO4 or local schemes, yes. Otherwise contributions may be required.
Will insulation cause damp?
Properly installed insulation does not cause damp. A survey checks ventilation, existing condition and suitability before install.
Can flats get insulation grants?
Yes, depending on the construction type, ownership and the freeholder’s permission.