Air conditioning for extensions and kitchen-diners in Streatham
London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset. In Streatham, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
For a kitchen-diner in Streatham, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Streatham sits around 5 miles from central London, inside our London area. That includes the SW16 postcode district.
Prices in Streatham
Budget around £1,895–£5,845 per space including VAT for air conditioning for extensions and kitchen-diners in and around Streatham. Prices here sit above the national middle, reflecting London labour rates and parking and access costs. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. On our London figures, the Large single option (one 5–7 kW unit for a large glazed space) is about £2,695–£3,745.
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
For most houses in Streatham, the outdoor unit is permitted development if it passes the MCS 020(a) noise check (37 dB(A) or less at the nearest neighbouring window) and stays within the size and number limits. We run that check on survey.
The survey
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. On a survey in Streatham 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
Included with air conditioning for extensions and kitchen-diners in Streatham:
- Hidden routes during the build, or neat surface routes after
- Handover of the remote or app
- Placement clear of the hob and oven
- One or two units sized for the whole space
- Free survey with glazing and roof heat-gain check
Nearby
Nearby, we also cover Mitcham (2 miles), Brixton (3 miles) and Wimbledon (3 miles). See all services in Streatham or air conditioning for extensions and kitchen-diners across London.