Heat load surveys and system design in Milford Haven
For self-builds and extensions in Milford Haven, a standalone design pack can go straight to your builder. Humid summer spells in South Wales make dehumidifying and cooling equally welcome.
No two rooms in Milford Haven gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. Milford Haven sits around 33 miles from Carmarthen, inside our Dyfed area. Homes in SA73 are all within our coverage.
Prices in Milford Haven
Guide prices around Milford Haven run from £365 to £1,145 for a standalone design pack including VAT. That sits a little below the UK middle, reflecting typical South and Mid Wales labour rates. 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 Milford Haven (drawings and schedules for one home) usually comes to about £365–£745.
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
Surveys in Milford Haven cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. 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 as standard in Milford Haven:
- Room-by-room heat gain and heat loss
- Written proposal with options
- Equipment selection and outdoor unit sizing
- Electrical load for your electrician
- Pipe and drain routes
Nearby
Nearby, we also cover Pembroke Dock (4 miles), Haverfordwest (7 miles) and Tenby (14 miles). See all services in Milford Haven or heat load surveys and system design across Dyfed.