Air conditioning for extensions and kitchen-diners in Dagenham
For a kitchen-diner in Dagenham, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. 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.
In Dagenham, a side wall of a single-storey extension is usually the neatest place for the indoor unit. We cover Dagenham as part of London, roughly 13 miles from central London. Postcode districts we cover here include RM10.
Prices in Dagenham
For Dagenham, expect roughly £1,895 to £5,845 per space, VAT included, adjusted for typical London rates. London is one of the dearer parts of the UK for trades, which shows in the range. 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. 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
Surveys in Dagenham cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. We book surveys in Dagenham at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Included with air conditioning for extensions and kitchen-diners in Dagenham:
- Placement clear of the hob and oven
- Handover of the remote or app
- Pressure test, vacuum and commissioning
- Free survey with glazing and roof heat-gain check
- Hidden routes during the build, or neat surface routes after
Nearby
If you are just outside Dagenham, we also work in Becontree (2 miles), Romford (2 miles) and Hornchurch (2 miles). See all services in Dagenham or air conditioning for extensions and kitchen-diners across London.