Air conditioning for extensions and kitchen-diners in Walthamstow
For a kitchen-diner in Walthamstow, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset.
An extension in Walthamstow with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Walthamstow sits around 8 miles from central London, inside our London area. Homes in E17 are all within our coverage.
Prices in Walthamstow
Guide prices around Walthamstow run from £1,895 to £5,845 per space including VAT. That is above the UK middle, mainly because labour and access cost more in London. The biggest variables are the pipe route, access for the outdoor unit and the state of the consumer unit, all of which the survey settles. As an example, the Large single option (one 5–7 kW unit for a large glazed space) would typically be £2,695–£3,745 here.
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
At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote. Surveys in Walthamstow cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare.
What is included
Here is what is included on every job in Walthamstow:
- Free survey with glazing and roof heat-gain check
- Placement clear of the hob and oven
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
- Handover of the remote or app
Nearby
Neighbouring places we cover include Leytonstone (2 miles), Tottenham (2 miles) and Woodford Green (2 miles). See all services in Walthamstow or air conditioning for extensions and kitchen-diners across London.