Heat load surveys and system design in Hadley Wood
For self-builds and extensions in Hadley Wood, a standalone design pack can go straight to your builder. London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset.
Every Hadley Wood quote starts with a room-by-room survey rather than a guess from floor area. Hadley Wood is about 12 miles from central London and falls within our London coverage. That includes the EN4 postcode district.
Prices in Hadley Wood
For Hadley Wood, expect roughly £495 to £1,645 for a standalone design pack, VAT included, adjusted for typical London rates. That is above the UK middle, mainly because labour and access cost more in London. Larger homes, more zones and full drawing sets for a builder are what move a design pack towards the upper figure. On our London figures, the Design pack option (drawings and schedules for one home) is about £495–£1,045.
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
Surveys in Hadley Wood cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. On a survey in Hadley Wood the engineer looks at room size, glazing, the route for pipes and drains, the electrics and where the outdoor unit can sit quietly, then the written quote follows.
What is included
Here is what is included on every job in Hadley Wood:
- Written proposal with options
- Equipment selection and outdoor unit sizing
- Room-by-room heat gain and heat loss
- Pipe and drain routes
- Electrical load for your electrician
Nearby
We also cover Barnet (2 miles), Potters Bar (2 miles) and Enfield (4 miles). See all services in Hadley Wood or heat load surveys and system design across London.