Heat load surveys and system design in South Glamorgan

Heat load surveys and system design across South Glamorgan

No two rooms in Cardiff gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. For self-builds and extensions in Cardiff, 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.

Prices in South Glamorgan

For South Glamorgan, expect roughly £365 to £1,145 for a standalone design pack, VAT included, adjusted for typical South and Mid Wales rates. Labour rates in South and Mid Wales keep this slightly under the national middle. 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. Typical Design pack work (drawings and schedules for one home) lands around £365–£745 in this area.

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

We book surveys in South Glamorgan at a time that suits you, including early evenings by arrangement, and send the written quote afterwards. 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.

What is included

Included with heat load surveys and system design across South Glamorgan:

• Written proposal with options
• Noise check to the nearest neighbour
• Equipment selection and outdoor unit sizing
• Pipe and drain routes
• Electrical load for your electrician
• Room-by-room heat gain and heat loss

Towns in South Glamorgan

Pick your town for local details, or see every service in South Glamorgan.

• Cardiff
• Barry
• Penarth
• Cowbridge
• Dinas Powys
• Llantwit Major