Air conditioning for extensions and kitchen-diners in Sudbury
Bright summers in the East of England mean solar gain through glass is usually the biggest load to design for. For a kitchen-diner in Sudbury, we place the indoor unit clear of the hob and plan the outdoor unit at the rear.
An extension in Sudbury with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Sudbury lies roughly 18 miles from Ipswich, and we cover it as part of Suffolk. That includes the CO10 postcode district.
Prices in Sudbury
In the East of England, our guide range for air conditioning for extensions and kitchen-diners is £1,595–£4,995 per space, including VAT. That is above the UK middle, mainly because labour and access cost more in the East of England. 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. For reference, the Large single option in Sudbury (one 5–7 kW unit for a large glazed space) usually comes to 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
At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote. 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
Every job in Sudbury includes:
- Pressure test, vacuum and commissioning
- Free survey with glazing and roof heat-gain check
- Handover of the remote or app
- Placement clear of the hob and oven
- One or two units sized for the whole space
Nearby
Close to Sudbury, our coverage also includes Colchester (13 miles), Haverhill (13 miles) and Braintree (13 miles). See all services in Sudbury or air conditioning for extensions and kitchen-diners across Suffolk.

