Air conditioning for extensions and kitchen-diners in Witham
In Witham, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Low rainfall and long summer days in the East of England make south-facing rooms the first to overheat.
An extension in Witham with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. We cover Witham as part of Essex, roughly 18 miles from Southend-on-Sea. Homes in CM8 are all within our coverage.
Prices in Witham
For Witham, expect roughly £1,595 to £4,995 per space, VAT included, adjusted for typical East of England rates. The East of England is one of the dearer parts of the UK for trades, which shows in the range. What moves a quote in Witham up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. On our East of England figures, the Large single option (one 5–7 kW unit for a large glazed space) is about £2,295–£3,195.
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
A survey in Witham 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. We book surveys in Witham at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Here is what is included on every job in Witham:
- One or two units sized for the whole space
- Hidden routes during the build, or neat surface routes after
- Pressure test, vacuum and commissioning
- Handover of the remote or app
- Free survey with glazing and roof heat-gain check
Nearby
We also cover Maldon (5 miles), Braintree (7 miles) and Chelmsford (9 miles). See all services in Witham or air conditioning for extensions and kitchen-diners across Essex.