Heat load surveys and system design in Sutton
Many London homes are flats or tall terraces, where heat rises to the top floor and the bedrooms bear the brunt of a hot spell. For self-builds and extensions in Sutton, a standalone design pack can go straight to your builder.
Every Sutton quote starts with a room-by-room survey rather than a guess from floor area. Sutton is about 11 miles from central London and falls within our London coverage. Coverage includes RH5, SM1 and SM2.
Prices in Sutton
Budget around £495–£1,645 for a standalone design pack including VAT for heat load surveys and system design in and around Sutton. That is above the UK middle, mainly because labour and access cost more in London. A standalone design pack is priced on the size of the home, the number of rooms and how much drawing work your builder or architect needs. Typical Design pack work (drawings and schedules for one home) lands around £495–£1,045 in this area.
Home survey
Free with an installation quote.
Design pack
Drawings and schedules for one home.
Self-build pack
Whole-house design for a new build.
Planning and permissions
Since 29 May 2025, England's permitted development rules allow larger outdoor units (up to 1.5 m³) and no longer require a 1 m gap to the boundary, provided the MCS 020(a) noise check is met. Listed buildings and pitched-roof installs still need permission.
The survey
At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote. On a survey in Sutton the engineer looks at room size, glazing, the route for pipes and drains, the electrics and where the outdoor unit can sit quietly, then the written quote follows.
What is included
Every job in Sutton includes:
- Electrical load for your electrician
- Room-by-room heat gain and heat loss
- Written proposal with options
- Noise check to the nearest neighbour
- Pipe and drain routes
Nearby
Neighbouring places we cover include Carshalton (2 miles), Banstead (2 miles) and Ewell (2 miles). See all services in Sutton or heat load surveys and system design across London.