Heat load surveys and system design in Carshalton
For self-builds and extensions in Carshalton, a standalone design pack can go straight to your builder. London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset.
No two rooms in Carshalton gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. We cover Carshalton as part of London, roughly 9 miles from central London. Coverage includes SM5.
Prices in Carshalton
For Carshalton, expect roughly £495 to £1,645 for a standalone design pack, VAT included, adjusted for typical London rates. That is above the UK middle, mainly because labour and access cost more in London. The design pack price depends mainly on the number of rooms and whether full drawings and equipment schedules are needed. As an example, the Design pack option (drawings and schedules for one home) would typically be £495–£1,045 here.
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
In England, most houses can have an outdoor unit under permitted development if it is no larger than 1.5 m³, meets the MCS 020(a) noise limit of 37 dB(A) at the nearest neighbour's window, and there are no more than two on a detached house or one on other houses. Listed buildings need consent.
The survey
A survey in Carshalton usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes. Surveys in Carshalton cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare.
What is included
Included as standard in Carshalton:
- Noise check to the nearest neighbour
- Written proposal with options
- Pipe and drain routes
- Electrical load for your electrician
- Equipment selection and outdoor unit sizing
Nearby
Nearby, we also cover Sutton (2 miles), Mitcham (2 miles) and Morden (2 miles). See all services in Carshalton or heat load surveys and system design across London.