Heat load surveys and system design in Horsham
Summers in the South East are among the warmest in the country, so cooling often comes first, with efficient winter heating as a bonus. For self-builds and extensions in Horsham, a standalone design pack can go straight to your builder.
Every Horsham quote starts with a room-by-room survey rather than a guess from floor area. Horsham sits around 7 miles from Crawley, inside our West Sussex area. That includes the RH12 postcode district.
Prices in Horsham
Heat load surveys and system design in Horsham typically come in at £495–£1,495 for a standalone design pack including VAT, based on South East England rates. South East England is one of the dearer parts of the UK for trades, which shows in the range. Larger homes, more zones and full drawing sets for a builder are what move a design pack towards the upper figure. Typical Design pack work (drawings and schedules for one home) lands around £495–£945 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
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
On a survey in Horsham 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. We book surveys in Horsham at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Every job in Horsham includes:
- Equipment selection and outdoor unit sizing
- Pipe and drain routes
- Electrical load for your electrician
- Noise check to the nearest neighbour
- Written proposal with options
Nearby
Nearby, we also cover Crawley (7 miles), Horley (11 miles) and Haywards Heath (11 miles). See all services in Horsham or heat load surveys and system design across West Sussex.

