Heat load surveys and system design in Leigh
For self-builds and extensions in Leigh, a standalone design pack can go straight to your builder. Damp North West weather makes the dehumidifying mode of a modern split system genuinely useful for much of the year.
No two rooms in Leigh gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. We cover Leigh as part of Greater Manchester, roughly 12 miles from Manchester. That includes the WN7 postcode district.
Prices in Leigh
Our North West England guide price for heat load surveys and system design is £375–£1,195 for a standalone design pack, VAT included. Labour rates in North West England keep this slightly under the national middle. Larger homes, more zones and full drawing sets for a builder are what move a design pack towards the upper figure. As an example, the Design pack option (drawings and schedules for one home) would typically be £375–£745 here.
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
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. 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.
What is included
Here is what is included on every job in Leigh:
- Written proposal with options
- Noise check to the nearest neighbour
- Electrical load for your electrician
- Equipment selection and outdoor unit sizing
- Pipe and drain routes
Nearby
If you are just outside Leigh, we also work in Atherton (2 miles), Tyldesley (2 miles) and Golborne (3 miles). See all services in Leigh or heat load surveys and system design across Greater Manchester.