Heat load surveys and system design across County Durham
Every Durham quote starts with a room-by-room survey rather than a guess from floor area. For self-builds and extensions in Durham, a standalone design pack can go straight to your builder. Cooler North East summers mean cooling is mostly needed in lofts, conservatories and rooms with large windows.
Prices in County Durham
For County Durham, expect roughly £365 to £1,145 for a standalone design pack, VAT included, adjusted for typical North East England rates. Labour rates in North East 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. For reference, the Design pack option in County Durham (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 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. We book surveys in County Durham at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Included with heat load surveys and system design across County Durham:
- Room-by-room heat gain and heat loss
- Written proposal with options
- Noise check to the nearest neighbour
- Pipe and drain routes
- Electrical load for your electrician
- Equipment selection and outdoor unit sizing
Towns in County Durham
Pick your town for local details, or see every service in County Durham.