Heat load surveys and system design in Derry/Londonderry
No two rooms in Derry/Londonderry gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. In Northern Ireland, cooling is mostly needed in conservatories and glazed rooms, while efficient heating benefits the whole home.
Every Derry/Londonderry quote starts with a room-by-room survey rather than a guess from floor area. As well as Derry/Londonderry itself, our County Londonderry coverage takes in Coleraine, Limavady and the towns around them. Postcode districts we cover here include BT48 and BT47.
Prices in Derry/Londonderry
Our Northern Ireland guide price for heat load surveys and system design is £365–£1,145 for a standalone design pack, VAT included. Labour rates in Northern Ireland keep this slightly under the national middle. The design pack price depends mainly on the number of rooms and whether full drawings and equipment schedules are needed. On our Northern Ireland figures, the Design pack option (drawings and schedules for one home) is 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
In Northern Ireland we confirm planning requirements for the outdoor unit on survey, especially for listed buildings and conservation areas.
The survey
We book surveys in Derry/Londonderry 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
Here is what is included on every job in Derry/Londonderry:
- Equipment selection and outdoor unit sizing
- Electrical load for your electrician
- Room-by-room heat gain and heat loss
- Pipe and drain routes
- Written proposal with options
Nearby
If you are just outside Derry/Londonderry, we also work in Strabane (14 miles), Limavady (15 miles) and Coleraine (27 miles). See all services in Derry/Londonderry or heat load surveys and system design across County Londonderry.

