Air conditioning for extensions and kitchen-diners in Muswell Hill
In London, heat soaks into brick and concrete during the day and comes back out at night, which is when it is hardest to sleep. An extension in Muswell Hill with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon.
In Muswell Hill, a side wall of a single-storey extension is usually the neatest place for the indoor unit. We cover Muswell Hill as part of London, roughly 6 miles from central London. Coverage includes N2 and N10.
Prices in Muswell Hill
Our London guide price for air conditioning for extensions and kitchen-diners is £1,895–£5,845 per space, VAT included. That is above the UK middle, mainly because labour and access cost more in London. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. Typical Large single work (one 5–7 kW unit for a large glazed space) lands around £2,695–£3,745 in this area.
Single unit
One 3.5–5 kW unit for a medium extension.
Large single
One 5–7 kW unit for a large glazed space.
Twin units
Two indoor units on a multi-split for long or L-shaped spaces.
Guide prices show VAT at 20%. HMRC treats most fixed air conditioners and air-to-air heat pumps installed in homes as energy-saving materials, zero-rated until 31 March 2027 when we supply and fit them. If your installation qualifies, your quote shows 0% VAT and a lower price. Servicing, repairs, cleaning and controls are charged at 20%.
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
We book surveys in Muswell Hill 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
Every job in Muswell Hill includes:
- Placement clear of the hob and oven
- Free survey with glazing and roof heat-gain check
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
- Hidden routes during the build, or neat surface routes after
Nearby
We also cover Wood Green (1 mile), Archway (2 miles) and Finchley (2 miles). See all services in Muswell Hill or air conditioning for extensions and kitchen-diners across London.