Trust ACLondon coverage
London enquiries are easier to quote when the first request explains parking, loading, building access, working hours, and any landlord or management constraints.
Southern England
London air conditioning installation and servicing
Air conditioning, servicing, and air-to-air heat pump estimate guidance for London and Greater London enquiries where access needs early checks.
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Photos that reduce uncertainty
Photos of the room, outdoor access, unit labels, balcony or roof access, and the path from the vehicle to the unit position help prevent vague quoting.
Nearby areas
Greater London, Reading, Watford, Slough, and nearby towns may need travel and access assumptions confirmed before a written quote.
Final confirmation
No online payment is taken. Trust AC confirms whether the enquiry is practical before final pricing, equipment, or dates are agreed.
Installing in London
What is different about air conditioning in a London home
On a London job, most of the cost and delay comes from the building rather than the unit. These are the things that decide whether an installation is simple, and they are worth knowing before you ask anyone for a price.
Your borough is the planning authority
Each London borough decides its own planning applications, and London has more than 1,000 conservation areas. In a conservation area, a heat pump on a wall or roof facing the street is not permitted development, so the outdoor unit usually goes at the back. Outside one, a street-facing wall is still ruled out above ground-floor level. A cooling-only unit needs planning permission wherever it goes.
In a flat, the lease comes first
Most London flats are leasehold, and leases commonly require the freeholder's written consent before anything is fixed to an outside wall, balcony or roof. Mansion blocks and managed developments often add their own rules on where units can sit and when work can happen. Ask the managing agent early; it is usually the slowest step.
Where the outdoor unit goes on a terrace
On Victorian and Edwardian terraces the usual positions are the rear wall, the flat roof of the back extension, or a bracket or ground stand in the garden. Each one changes the pipe run and the labour. A rear first-floor room is often simpler than a front bedroom, because the pipe can go straight out through the back wall.
Getting the van and the kit to the door
In a controlled parking zone a paid bay or a parking suspension from the borough may be needed, and the Congestion Charge applies in central London. Lifts, stairs and narrow rear access matter as well: the outdoor unit for a multi-split system can need two people to carry it up a staircase.
The rooms that overheat
Heathrow reached 40.2°C on 19 July 2022. Top-floor flats, loft conversions and rooms with large south- or west-facing windows are where London homes get hottest. Size the unit for that room, after shading and ventilation have been considered, rather than for the flat as a whole.
Noise and the neighbours
A London outdoor unit is often a few metres from someone else's bedroom window. Under permitted development the unit has to pass the MCS 020a noise calculation, and borough environmental health teams handle complaints afterwards, so choose the position with the neighbour's window in mind.
Nearby coverage
Related postcode areas can still be reviewed.
Share your postcode and a couple of photos — we'll come back with your price range.
- 01Greater London
- 02Reading
- 03Watford
- 04Slough
Air conditioning in London — common questions
How much does air conditioning cost in London?
A single-room installation usually starts around £1,500, with multi-room and commercial work higher. The honest answer for London depends on the room, the outdoor unit position and the pipe route — so use the free online estimate for an indicative range in minutes, and we confirm the final price in writing.
Do I need planning permission to install air conditioning in London?
It depends on the unit. A reversible air-to-air heat pump (heating as well as cooling) on a house is often permitted development if it meets the Class G limits — outdoor unit size, siting away from the road-facing elevation, the number of units, and the MCS noise standard. A cooling-only unit is not covered by those rights and does need planning permission. Listed buildings need listed building consent, conservation areas and other protected areas need permission, and flats have a tighter size limit and usually need freeholder consent as well. London work usually needs congestion, loading, lift or stair access and building-management rules checked early. Send a photo of the outside wall and we will tell you which applies — your local council has the final say.
How quickly can I get a price for a London project?
The online estimate gives you an indicative range in minutes — no account, no obligation. We then check the postcode, access and photos for Southern England travel before confirming equipment, price and dates in writing.
Do you cover areas near London?
Yes — Greater London, Reading, Watford, Slough and other nearby Southern England towns can be quoted from the same online estimate. Send your full postcode and we will confirm coverage and any travel assumptions before quoting.
Do I need my freeholder's permission to install air conditioning in a London flat?
Usually, yes. Leases commonly require the freeholder's written consent before anything is fixed to an outside wall, balcony or roof, and that is separate from planning permission. Check the alterations clause in your lease and speak to the managing agent before booking an installation.
Can the outdoor unit go on the front of my house in London?
Often not without planning permission. In a conservation area, a heat pump on a wall or roof facing the street is not permitted development; outside one, it cannot go on a street-facing wall above ground-floor level. A cooling-only unit needs planning permission anywhere. Your borough council has the final say.