Heat load surveys and system design across Cornwall
No two rooms in Truro gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. For self-builds and extensions in Truro, a standalone design pack can go straight to your builder. South West summers are milder on the coast, but sheltered towns and south-facing rooms still overheat, and efficient winter heating matters just as much.
Prices in Cornwall
Guide prices around Cornwall run from £395 to £1,250 for a standalone design pack including VAT. That is broadly in line with national guide prices. 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 Cornwall (drawings and schedules for one home) usually comes to about £395–£795.
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
On a survey in Cornwall 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. A survey in Cornwall 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.
What is included
Included with heat load surveys and system design across Cornwall:
- Electrical load for your electrician
- Room-by-room heat gain and heat loss
- Noise check to the nearest neighbour
- Equipment selection and outdoor unit sizing
- Written proposal with options
- Pipe and drain routes
Towns in Cornwall
Pick your town for local details, or see every service in Cornwall.