Air conditioning for extensions and kitchen-diners in Blackheath
The urban heat island effect means London bedrooms can stay uncomfortably warm on summer nights. In Blackheath, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
For a kitchen-diner in Blackheath, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Blackheath sits around 6 miles from central London, inside our London area. That includes the SE3 postcode district.
Prices in Blackheath
Guide prices around Blackheath 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. What moves a quote in Blackheath up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. For reference, the Large single option in Blackheath (one 5–7 kW unit for a large glazed space) usually comes to 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
In England, most houses can have an outdoor unit under permitted development if it is no larger than 1.5 m³, meets the MCS 020(a) noise limit of 37 dB(A) at the nearest neighbour's window, and there are no more than two on a detached house or one on other houses. Listed buildings need consent.
The survey
Surveys in Blackheath cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. 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
Included as standard in Blackheath:
- Free survey with glazing and roof heat-gain check
- Pressure test, vacuum and commissioning
- Placement clear of the hob and oven
- One or two units sized for the whole space
- Hidden routes during the build, or neat surface routes after
Nearby
Close to Blackheath, our coverage also includes Greenwich (1 mile), Catford (2 miles) and Eltham (2 miles). See all services in Blackheath or air conditioning for extensions and kitchen-diners across London.