Heat load surveys and system design in Rayleigh
The East of England is one of the sunniest and driest parts of the UK, which makes glazed rooms and lofts hard to keep cool. Every Rayleigh quote starts with a room-by-room survey rather than a guess from floor area.
For self-builds and extensions in Rayleigh, a standalone design pack can go straight to your builder. We cover Rayleigh as part of Essex, roughly 6 miles from Southend-on-Sea. We cover SS6 and the streets around them.
Prices in Rayleigh
Our East of England guide price for heat load surveys and system design is £445–£1,395 for a standalone design pack, VAT included. Prices here sit above the national middle, reflecting East of England labour rates and parking and access costs. 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. On our East of England figures, the Design pack option (drawings and schedules for one home) is about £445–£895.
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
England's rules let most houses fit an outdoor unit without a planning application, as long as the size, number and MCS 020(a) noise conditions are met. Flats, listed buildings and roof-mounted units are treated differently.
The survey
A survey in Rayleigh 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. 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.
What is included
What a job in Rayleigh covers:
- Noise check to the nearest neighbour
- Room-by-room heat gain and heat loss
- Pipe and drain routes
- Equipment selection and outdoor unit sizing
- Written proposal with options
Nearby
Nearby, we also cover South Benfleet (3 miles), Wickford (4 miles) and Pitsea (4 miles). See all services in Rayleigh or heat load surveys and system design across Essex.

