Air conditioning for extensions and kitchen-diners in St Albans
For a kitchen-diner in St Albans, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Low rainfall and long summer days in the East of England make south-facing rooms the first to overheat.
In St Albans, a side wall of a single-storey extension is usually the neatest place for the indoor unit. St Albans sits around 7 miles from Watford, inside our Hertfordshire area. We cover AL1 and AL3 and the streets around them.
Prices in St Albans
Budget around £1,595–£4,995 per space including VAT for air conditioning for extensions and kitchen-diners in and around St Albans. Prices here sit above the national middle, reflecting East of England labour rates and parking and access costs. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. 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
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. A survey in St Albans 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.
What is included
Included as standard in St Albans:
- Pressure test, vacuum and commissioning
- Free survey with glazing and roof heat-gain check
- One or two units sized for the whole space
- Hidden routes during the build, or neat surface routes after
- Handover of the remote or app
Nearby
If you are just outside St Albans, we also work in Harpenden (5 miles), Hatfield (5 miles) and Hemel Hempstead (5 miles). See all services in St Albans or air conditioning for extensions and kitchen-diners across Hertfordshire.