Heat load surveys and system design in Hornchurch
In London, heat soaks into brick and concrete during the day and comes back out at night, which is when it is hardest to sleep. No two rooms in Hornchurch gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing.
For self-builds and extensions in Hornchurch, a standalone design pack can go straight to your builder. Hornchurch sits around 15 miles from central London, inside our London area. That includes the RM11 and RM12 postcode districts.
Prices in Hornchurch
Heat load surveys and system design in Hornchurch typically come in at £495–£1,645 for a standalone design pack including VAT, based on London rates. Prices here sit above the national middle, reflecting London 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. For reference, the Design pack option in Hornchurch (drawings and schedules for one home) usually comes to about £495–£1,045.
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
The free survey is where the real price is set: room measurements, pipe and drain routes, electrical checks and the outdoor unit position, all written into your quote. On a survey in Hornchurch 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 Hornchurch includes:
- Room-by-room heat gain and heat loss
- Equipment selection and outdoor unit sizing
- Electrical load for your electrician
- Noise check to the nearest neighbour
- Pipe and drain routes
Nearby
If you are just outside Hornchurch, we also work in Romford (2 miles), Dagenham (2 miles) and Becontree (4 miles). See all services in Hornchurch or heat load surveys and system design across London.