Heat load surveys and system design in Porthmadog
Every Porthmadog quote starts with a room-by-room survey rather than a guess from floor area. In North Wales, an air-to-air system can be an efficient way to heat holiday homes and bungalows, with cooling as a bonus.
No two rooms in Porthmadog gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. We cover Porthmadog as part of Gwynedd, roughly 21 miles from Bangor, Gwynedd. Coverage includes LL49.
Prices in Porthmadog
Budget around £370–£1,195 for a standalone design pack including VAT for heat load surveys and system design in and around Porthmadog. That sits a little below the UK middle, reflecting typical North Wales labour rates. 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 Porthmadog (drawings and schedules for one home) usually comes to about £370–£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
Wales removed its old 3 m boundary rule on 1 June 2026, so most houses in Porthmadog can now have an outdoor unit under permitted development if it meets the MCS 020a noise condition. Listed buildings still need consent, and conservation areas have extra restrictions.
The survey
Surveys in Porthmadog cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. A survey in Porthmadog usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes.
What is included
Included as standard in Porthmadog:
- Electrical load for your electrician
- Written proposal with options
- Noise check to the nearest neighbour
- Equipment selection and outdoor unit sizing
- Pipe and drain routes
Nearby
If you are just outside Porthmadog, we also work in Pwllheli (12 miles), Caernarfon (16 miles) and Dolgellau (16 miles). See all services in Porthmadog or heat load surveys and system design across Gwynedd.