Heat load surveys and system design in Portishead
In the South West, a system that heats well through damp winters is often as valuable as summer cooling. For self-builds and extensions in Portishead, a standalone design pack can go straight to your builder.
No two rooms in Portishead gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. Portishead is about 35 miles from Taunton and falls within our Somerset coverage. That includes the BS20 postcode district.
Prices in Portishead
Heat load surveys and system design in Portishead typically come in at £395–£1,250 for a standalone design pack including VAT, based on South West England rates. That is close to the UK middle for this kind of work. Larger homes, more zones and full drawing sets for a builder are what move a design pack towards the upper figure. On our South West England figures, the Design pack option (drawings and schedules for one home) is 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
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. A survey in Portishead 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
Here is what is included on every job in Portishead:
- Electrical load for your electrician
- Equipment selection and outdoor unit sizing
- Noise check to the nearest neighbour
- Room-by-room heat gain and heat loss
- Written proposal with options
Nearby
We also cover Clevedon (5 miles), Henbury (7 miles) and Clifton (7 miles). See all services in Portishead or heat load surveys and system design across Somerset.