Wimbledon falls in the London Borough of Merton, and Kingston upon Thames is in the Royal Borough of Kingston upon Thames. Between them they have more than fifty conservation areas. Combine that with flats, leasehold consent and London parking and you have the main factors behind an air conditioning quote here.
This guide is laid out as a series of decisions you’ll make, with the price impact of each.
The starting price
All + VAT. Installation includes the equipment, fitting, commissioning and F-Gas documentation.
| System | Price |
|---|---|
| One room | £1,200–£2,200 |
| Two rooms | £2,800–£4,500 |
| Three to five rooms | £4,500–£8,500 |
| Annual service | £95–£150 |
Repair visits start from £75 for diagnosis. Larger commercial systems are priced after a survey.
Decision 1: one room or several?
A single split for one room is the cheapest way in. If you think you’ll want more rooms later, one multi-split outdoor unit can serve several indoor units, which saves wall space and usually money compared with several separate systems. Our multi-split guide explains the trade-offs. Bear in mind that each indoor unit needs its own pipe route back to the outdoor unit, so rooms on different floors add to the work.
Decision 2: where does the outdoor unit go?
Check first whether your street is in a conservation area. Merton’s list of conservation areas includes 29, seven with Wimbledon in the name: Wimbledon Broadway, Wimbledon Chase, Wimbledon Hill Road, Wimbledon North, Wimbledon Village, Wimbledon West and Wimbledon Windmill. Kingston’s list has 26, including Kingston Old Town, Riverside North, Riverside South and Fairfield/Knight’s Park.
In a conservation area, the outdoor unit can’t go on a wall or roof that faces a road if you want to rely on permitted development. A rear garden, side return or hidden flat roof usually works, but may mean a longer pipe run. That’s the most common reason a quote moves up the band.
Decision 3: do you need anyone’s consent?
If you own a leasehold flat, you’ll normally need the landlord’s written consent for an outdoor unit and any pipes on the outside of the building. The lease may set a process and a fee. Listed buildings also need listed building consent. See our leasehold consent guide and listed building guide. General information, not legal advice.
Want it done properly? AirCon Doctor installs, repairs and services air conditioning and heat pumps across London and the South East, from our base in East Grinstead. We’re an F-Gas certified company and NICEIC approved. Get a fixed-price quote.
Decision 4: how will we get to the job?
Many streets in both boroughs have controlled parking. Tell us where we can park and how to reach the property, and the quote will reflect it. In blocks of flats, let us know about lifts, stairs and any rules on working hours set by the building.
Decision 5: heat as well as cool?
Most modern split systems are heat pumps that heat as well as cool. The Energy Saving Trust notes that air-to-air heat pumps are sometimes referred to as air conditioning. If you want the system to replace your gas boiler and heat the whole home, the Boiler Upgrade Scheme can pay £2,500 towards it, as long as it meets the full heating demand and isn’t fitted alongside the boiler. Air-to-water heat pumps get £7,500. We’re MCS certified and make the application.
The planning rules in brief
The Planning Portal sets the limits for a house: an outdoor unit of no more than 1.5 m³, it complies with MCS 020(a), it isn’t used solely for cooling and it’s sited within the rules. Air-to-air heat pumps are covered since 2025. Flats have a 0.6 m³ limit and other conditions. A cooling-only unit isn’t covered.
VAT
The 0% VAT rate for heat pumps fitted in homes runs to 31 March 2027; from April 2027 it becomes 5% (HMRC Notice 708/6). Each case depends on the facts, so we confirm the VAT on your quote. Businesses pay the standard rate. General guidance, not tax advice.
Local pages: Wimbledon and Kingston upon Thames, plus our London page.
Quick answers
Is Wimbledon Village a conservation area?
Yes. Merton lists Wimbledon Village among its 29 conservation areas.
Can I put an outdoor unit on the balcony of my Kingston flat?
Possibly, with the landlord’s consent and within the planning limits for flats. We check both before quoting.
Which council handles planning in Wimbledon?
The London Borough of Merton. Kingston upon Thames is handled by the Royal Borough of Kingston upon Thames.
Do you service systems in Wimbledon and Kingston?
Yes. An annual service is £95–£150 + VAT, and repair visits start at £75 + VAT for diagnosis.
Is a multi-split cheaper than two single systems?
Often, for two or more rooms, because one outdoor unit serves them all. We’ll price both options if you ask.
Related services
More advice
- Air Conditioning Cost in Richmond and Twickenham: 2026 Price Guide
- Multi-Split Air Conditioning: Is It Right for Your Home?
- Air Conditioning in a Leasehold Flat: Getting Consent
- Air Conditioning Cost in Sutton and Epsom: 2026 Price Guide
- All advice
This guide is general information, checked against the sources linked on 30 October 2026. It isn’t legal, tax or financial advice. Rules, grants and product ranges change, so check the current position before you rely on it.