Air conditioning for extensions and kitchen-diners in Birkenhead
For a kitchen-diner in Birkenhead, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Damp North West weather makes the dehumidifying mode of a modern split system genuinely useful for much of the year.
An extension in Birkenhead with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Birkenhead is about 2 miles from Liverpool and falls within our Merseyside coverage. We cover CH41 and CH42 and the streets around them.
Prices in Birkenhead
Guide prices around Birkenhead run from £1,395 to £4,245 per space including VAT. It is a touch below the UK middle, as trade rates in North West England tend to be. What moves a quote in Birkenhead up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. For reference, the Large single option in Birkenhead (one 5–7 kW unit for a large glazed space) usually comes to about £1,945–£2,695.
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 Birkenhead cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. We book surveys in Birkenhead 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 Birkenhead:
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
- Handover of the remote or app
Nearby
We also cover Liverpool (2 miles), Wallasey (3 miles) and Bebington (3 miles). See all services in Birkenhead or air conditioning for extensions and kitchen-diners across Merseyside.