Air conditioning for extensions and kitchen-diners in Bexley
In Bexley, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Many London homes are flats or tall terraces, where heat rises to the top floor and the bedrooms bear the brunt of a hot spell.
An extension in Bexley with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Bexley lies roughly 12 miles from central London, and we cover it as part of London. Homes in DA15 are all within our coverage.
Prices in Bexley
In London, our guide range for air conditioning for extensions and kitchen-diners is £1,895–£5,845 per space, including VAT. Prices here sit above the national middle, reflecting London labour rates and parking and access costs. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. For reference, the Large single option in Bexley (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
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
A survey in Bexley 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. On a survey in Bexley 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
Here is what is included on every job in Bexley:
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
- Handover of the remote or app
Nearby
We also cover Welling (2 miles), Dartford (3 miles) and Swanley (3 miles). See all services in Bexley or air conditioning for extensions and kitchen-diners across London.