Mid-terrace houses and ECO4: questions UK households ask (guide 2026)

Guide by ApplyFreeBoiler.uk (Reliant Energy Solutions Ltd), a heating and insulation installer in Bury, Greater Manchester. We are not the government, Ofgem or an energy supplier.

Mid-terrace houses share walls with a neighbour on each side, so heat is lost mainly through the front and rear walls, the roof and the floor. This raises a few common questions when a home is assessed for ECO4 heating or insulation. This guide covers questions households commonly ask. It is general information from ApplyFreeBoiler.uk, a heating and insulation installer in Bury. What is recommended depends on the survey and the scheme rules at the time. This page does not guarantee funding.

1. Front and rear walls

Tell the surveyor about the front and rear walls, especially any that feel cold or show damp. The surveyor will confirm the wall type.

2. Shared loft spaces

Some older terraces have lofts that are not fully separated from neighbours. Mention it if you know this applies to your home.

3. Rear extensions and outriggers

Many terraces have a rear kitchen or bathroom extension. Point out cold rooms at the back of the house.

4. Access through the house

Mid-terraces often have no side access, so materials may need to come through the house. Ask how this will be handled.

5. Boiler and flue position

Say where the boiler and flue are, as the flue position can matter on terraced streets.

6. Damp and ventilation

Mention damp patches, mould or condensation, and whether rooms have working vents or extractor fans.

7. Clear access

Clear space around the boiler, meters and loft hatch before the survey visit.

8. Check funding and local figures

See ECO measures by council on ApplyFreeBoiler.uk, built from DESNZ Household Energy Efficiency statistics, to see how many ECO measures have been installed in your local authority area. Use the ApplyFreeBoiler.uk eligibility check to see whether an ECO4 heating or insulation pathway may be available for your home in England, Scotland or Wales. ECO4 is due to close on 31 December 2026.