Air conditioning in
Harrow
Installation, servicing and repair across Harrow, Pinner, Stanmore, Wealdstone, Edgware, Kenton and Rayners Lane. Thirty five to fifty minutes from N14, so we usually book Harrow work in blocks.
- Free survey, usually within 48 hours
- Fixed written price before any work starts
- Permission position checked for your address first
Harrow on the Hill. Photograph by Dr Neil Clifton, CC BY-SA 2.0, via Wikimedia Commons.
Accredited, and fitting the brands you know
Finished jobs nearest Harrow
Our own installations, the closest to Harrow first, photographed on the day. Tap one for the full story.
Heat pump
NW7
Mill Hill
Vaillant aroTHERM plus air source heat pump
Gas boiler to heat pump in three days, with the grant approved within 48 hours. The unit stands on anti-vibration feet on a concrete pad close to the house, which keeps the pipe run short.
View the project
Heat pump
NW10
Neasden
Vaillant aroTHERM plus air source heat pump
Set into the corner of the garden against the fence on a raised base, clear of the lawn, replacing a gas boiler over three days.
View the project
Heat pump
W5
Ealing
Samsung 12 kW high temperature air source heat pump
A two-zone system with a 300-litre cylinder and a buffer tank, 15 metres of pipework run underground to the unit on its own concrete base, and radiators replaced where they were too small for a heat pump.
View the project
Heat pump
W13
West Ealing
Vaillant aroTHERM plus air source heat pump
An aroTHERM plus on a poured pad against the boundary fence, with the drain point brought out through the pad so the defrost water has somewhere to go.
View the project
Heat pump
N12
North Finchley
Samsung air source heat pump with hydrobox
Heat pump and hydrobox both outside in the side passage, which keeps the whole system out of the house and leaves the cupboard the old boiler used.
View the project
Solar
TW8
Brentford
Roof-mounted solar array
Panels on a flat roof carried on tilted frames rather than laid flat, which is what brings a London flat roof close to the yield of a south-facing pitch.
View the project
Heat pump
TW8
Brentford
Vaillant aroTHERM plus 7 kW with a 300-litre cylinder
Outside, the unit stands against the side wall on its feet. Inside, a 300-litre uniSTOR cylinder, wireless controls and a 25-litre buffer vessel.
View the project
Heat pump
EN4
Barnet
Cascade pair of air source heat pumps
Two machines in cascade on a flat roof, flow and return in insulated copper with isolating valves on each leg, so one can be shut down and worked on while the other keeps the building warm.
View the project
Air conditioning installation in Harrow costs 2,400 to 3,200 pounds for a single room, fitted and including VAT, and takes one day on site.
The interwar stock across Pinner and Kenton has the space and the layout that make multi-room systems economic, which is why the average Harrow job is larger than the average inner London one.
Read the full guide: 6 sections, about 3 minutes
The housing stock in Harrow, and what it means for the job
Harrow is one of the most straightforward boroughs in London to install in, for the same reason as Enfield. Large parts of Pinner, Stanmore and Kenton are interwar semi-detached and detached houses with side returns, driveways and real gardens, which means good outdoor unit positions and short pipe runs. Conservation area coverage is comparatively low. The main complications are the areas of newer flats around Harrow town centre and Wealdstone, and some very large houses in Stanmore where the honest answer is a multi-split rather than one unit.
The typical Harrow installation
A typical Harrow job is a three-unit multi-split covering two bedrooms and a living room in a 1930s semi, with a single outdoor unit in the side return. Two days on site.
How far we are from Harrow, and what we have finished nearby
Our own address is N14 5RH, which is 9.1 miles from the middle of Harrow in a straight line. A drive is longer than that and depends on the hour, so thirty five to fifty minutes from N14, so we usually book Harrow work in blocks.
The three jobs of ours closest to Harrow, with the distance from the borough rather than from us, because that is the number that says whether we know the area:
- Mill Hill NW7, heat pump: 4.0 miles from Harrow. Vaillant aroTHERM plus air source heat pump.
- Neasden NW10, heat pump: 4.2 miles from Harrow. Vaillant aroTHERM plus air source heat pump.
- Ealing W5, heat pump: 5.3 miles from Harrow. Samsung 12 kW high temperature air source heat pump.
What it costs here
| Job | System | Installed price |
|---|---|---|
| One bedroom | 2.5kW single split | £2,400 to £3,200 |
| Double bedroom | 3.5kW single split | £2,550 to £3,500 |
| Two rooms | 2 unit multi-split | £4,300 to £5,800 |
| Three rooms | 3 unit multi-split | £6,400 to £8,600 |
| Whole house, four or five rooms | Multi-split, one or two outdoor | £8,400 to £14,000 |
| Heat pump, three bedroom house | After the £7,500 grant | £5,700 to £8,700 |
| Annual service | Any make | £95 plus VAT |
Every figure on this site is an estimate built from the quotations we issued in 2026 and our own installation experience. It is not a quotation. The price you are given after the free survey is the price you pay.
Permission in Harrow
Conservation area coverage in Harrow is comparatively low, which is one of the reasons installations here tend to be straightforward. On a house, an installation meeting the Class G conditions is permitted development and needs no application. We still check the address, because one listed building or one Article 4 street is enough to change the answer.
What the housing in Harrow means for permission
65 per cent of homes in Harrow are houses, which is high for London and is the main reason installations here tend to be straightforward. 11 per cent are detached and 37 per cent semi-detached, and a semi with a side return is close to the ideal outdoor unit position. Only 35 per cent are flats, and those are the ones that need planning permission and freeholder consent. The single most common home in Harrow is the semi-detached house, 37 per cent, and a semi with a side return is the best outdoor unit position there is. Of the 21 boroughs we cover north of the Thames, Harrow has the fifth highest share of houses.
| Home type | Share of Harrow | What it means here |
|---|---|---|
| Detached | 11% | The easiest, with a choice of elevations |
| Semi-detached | 37% | The typical home here. A side return is the best position there is |
| Terraced | 17% | No side access, so the rear or a bracket |
| Purpose-built flat | 26% | Planning permission and freeholder consent, both |
| Converted flat | 7% | Two permissions, usually a smaller freeholder |
Shares of the 89,642 households counted in Harrow at the 2021 Census, table TS044, rounded. Percentages do not total 100 because homes in commercial buildings and temporary structures are counted separately.
Everything we fit in Harrow
65 per cent of homes in Harrow are houses, which is the kind of home a heat pump on the 7,500 pound grant and a roof of solar panels suit best. The same team fits all of it.
Split air conditioning
One room or the whole house. Domestic and commercial.
See what it costs
Air source heat pumps
Replaces the gas boiler. We take the 7,500 pound grant off your invoice.
Price my heat pump
Servicing and repair
Book a service
Ducted air conditioning
The unit sits in the ceiling void. Only the grilles show.
How it is fitted
Solar panels
Get a roof survey
Battery storage
See if it pays
Your estimate
£2,400to£3,200
Supplied, fitted, commissioned and certificated. Includes VAT.
Send this on WhatsAppPrice it for your address
The same model the rest of the site uses. Tell us the postcode and the survey turns it into one fixed written price.
Last step: where do we send your written price?
Every figure on this site is an estimate built from the quotations we issued in 2026 and our own installation experience. It is not a quotation. The price you are given after the free survey is the price you pay.
Air conditioning in Harrow: common questions
How much does air conditioning cost in Harrow?
2,400 to 3,200 pounds for a single room, and multi-room systems are proportionally better value here than in inner London. A two-room system on one outdoor unit is typically 4,300 to 5,800 pounds, and three rooms 6,400 to 8,600 pounds.
Every price includes the units, installation, commissioning, electrical work and VAT. The fixed price comes after a free survey. There is a full breakdown on the cost page.
Do I need planning permission for air conditioning in Harrow?
Most likely not. 65 per cent of homes in Harrow are houses, and a house installation meeting the Class G conditions is permitted development.
The section further down this page sets out what the housing stock here means in practice, and every condition is on the planning permission page. We check the conservation area boundary, any Article 4 direction and the listed building register for your exact address before quoting.
How quickly can you get to Harrow?
Thirty five to fifty minutes from N14, so we usually book Harrow work in blocks. For a survey we usually offer something within 48 hours, and for a fault call we will tell you the day we can genuinely attend rather than promising one we cannot keep.
Do you install in flats in Harrow?
Yes. 35 per cent of homes in Harrow are flats, 26 per cent of them purpose-built and 7 per cent conversions, so it is a large share of what we do here. It takes two permissions rather than one: the freeholder's written consent and planning permission from the council.
We prepare the licence pack the managing agent will ask for at no charge, including the drawing, the sound data and the insurance. The order the two permissions are done in is what decides whether it is expensive, and there is a full sequence on the leasehold flats page.
Free survey anywhere in Harrow
Thirty five to fifty minutes from N14, so we usually book Harrow work in blocks. Tell us the postcode and the rooms, and we will give you a written fixed price and an honest answer on permission.
Monday to Friday 9am to 7pm, Saturday 10am to 3pm, Sunday closed
Page updated