Heat load surveys and system design in Cardigan
For self-builds and extensions in Cardigan, a standalone design pack can go straight to your builder. South Wales summers can be warm and humid, and winters damp, so a reversible system earns its keep all year.
No two rooms in Cardigan gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. Our Dyfed coverage takes in Cardigan, about 22 miles from Carmarthen. Homes in SA43 are all within our coverage.
Prices in Cardigan
In South and Mid Wales, our guide range for heat load surveys and system design is £365–£1,145 for a standalone design pack, including VAT. It is a touch below the UK middle, as trade rates in South and Mid Wales tend to be. 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 £365–£745 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
Since 1 June 2026, Welsh permitted development rules for outdoor units closely match England's: up to 1.5 m³, two units on a detached home, one on other homes, and MCS 020a noise compliance. Listed buildings need consent, and conservation areas have extra restrictions on units facing a road.
The survey
On a survey in Cardigan 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 Cardigan 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 in Cardigan:
- Pipe and drain routes
- Noise check to the nearest neighbour
- Equipment selection and outdoor unit sizing
- Room-by-room heat gain and heat loss
- Electrical load for your electrician
Nearby
Close to Cardigan, our coverage also includes Carmarthen (22 miles), Haverfordwest (23 miles) and Tenby (28 miles). See all services in Cardigan or heat load surveys and system design across Dyfed.