Air conditioning in Harrow

Fitting air conditioning in Harrow

Air conditioning installation in Harrow starts with a survey of your rooms and your building. We check the unit size, the pipe route and where the outdoor unit can go, then you get a written quote. How an installation works.

A single split cools one room, and a multi-split runs several rooms from one outdoor unit. Fewer outdoor units means less to place, which helps on a terrace or in a flat. Most split units heat as well as cool, so one system can do both jobs.

A few things make the survey quicker:

• a list of the rooms you want cooled
• your lease, if you live in a flat
• the name of your conservation area, if you’re in one

Controlled parking zones cover parts of Harrow, and street parking there is for permit holders during set hours. If your street is in one, a visitor permit may cover us. The council says they suit a short visit from a repair person. We’ll ask when we book.

Most units heat as well as cool. How air con can heat your home.

Servicing and repairs

Servicing and repairs cover all of Harrow, whoever fitted your system. A service keeps it clean and running well, and a repair visit finds out why it has stopped cooling or shown a fault. What a service covers and how a repair visit works.

A unit that has stopped cooling is worth a quick check before you book:

1. Set the mode to Cool, and the temperature below the room’s.
2. Check the remote’s batteries and any timer.
3. Clear anything from around the outdoor unit.

Ice that comes back, water dripping indoors or an error code all need an engineer. Why air con stops cooling.

Air con makes we fit in Harrow

Air con makes we fit in Harrow include the nine below, and we’ll suggest the one that suits your rooms. We service and repair these makes too, whoever fitted them. The make and model are on a label on the indoor unit, so have them ready when we call.

More homes are fitting air con

More UK homes are fitting air conditioning, and homes with built-in units have about doubled in three years. The best time for a survey is before the first hot spell, when fitters have more room in the diary.

How VAT and the grant affect what you pay.

Source: Uswitch (April 2026).

Shops, offices and restaurants in Harrow

Shops, offices and restaurants in Harrow should plan for noise from the start, because homes are often close by. The census counted about 1,200 households over a shop, or in an office or hotel building. The highest numbers are around Greenhill in HA1, then Alexandra Park and Kenton West.

The council’s Local Plan names the borough’s main centres:

• Harrow town centre
• Wealdstone, South Harrow, Rayners Lane and North Harrow
• Pinner and Stanmore
• the Harrow sides of Edgware, Burnt Oak and Kenton

A 2025 application from an HA5 restaurant, for kitchen extraction and air con on a rear flat roof, was approved.

How commercial jobs work.

Sources: Census 2021, table TS044, Harrow’s Local Plan and Harrow’s planning register. The census is taken every 10 years.

Harrow on the Hill and the conservation areas

Harrow on the Hill treats the back of a house as on show, and that changes where an outdoor unit can go. The council’s guidance for the Hill says “even installations at the rear” could have an impact. Its reason is the slope, which puts the backs of buildings in public view.

That passage is about solar panels and wind turbines, and the Hill’s 2008 guidance doesn’t name air con. We read it across to outdoor units, because its Policy 5 protects the look of an elevation.

Guidance elsewhere in the borough does name air con:

• Pinner, Stanmore and Edgware: units should be “carefully sited to protect streetscene views and historic built fabric”.
• Pinner High Street and Kerry Avenue: units should be as concealed as possible, which usually means out of sight of the street.
• Edgware High Street: the council’s concern is poorly sited units, so position matters here.

Harrow has 30 conservation areas, and 16 have Article 4 directions, which remove rights that homes elsewhere keep. Four areas on the Hill also have directions on gates, fences and walls. So a screen built to hide a unit may need its own permission. Check your street.

The Hill also has about 80 listed building entries, and heat pump rights don’t cover a listed home.

These documents still count. The council adopted a new Local Plan on 24 March 2026, and it says existing guidance continues until replaced.

Some houses on the Hill have no side that stays out of view, so an outdoor unit may not be the answer there. Units with no outdoor box, and how the spots compare.

Sources: the Hill’s guidance (2008), paragraphs 5.24 and 6.12 and Policy 5, Pinner’s (2009), section 8.3.6, and Stanmore and Edgware’s (2013), paragraph 5.0.10. Also the Pinner High Street and Kerry Avenue appraisals, the council’s Article 4 report (2021), its conservation pages and its Local Plan, paragraph A.5.3.

Planning for air con in Harrow

Harrow Council has approved most of the air con put to it: 14 of 18 applications over the five years to October 2026.

PlanIt has decision dates for 6 of the 18, and those took a median of 96 days. That’s about 14 weeks against an 8-week target, so treat it as a rough guide.

These are past results, not a promise for your home. They count people who applied, and many units never need an application.

We check the planning route at the survey. If you need to apply or ask a freeholder, we supply the drawings and the unit’s data.

How planning works for air con, and planning in a flat.

Sources: Harrow’s planning register and PlanIt (read 31 October 2026), and government planning statistics.

Houses, semis and the planning route

Semis set the pattern in Harrow, at 37.1% of households against 18.6% across London. About 65% of households live in a house, and about 35% in a flat. So the national heat pump rights are the first thing to check, because a semi can take one unit within limits. The limits in full.

The council’s Local Plan calls much of the borough Metroland, with homes of two or three storeys. Even so, the job changes from one area to the next:

• Belmont and Queensbury West: about 7 in 10 homes are semis. One outdoor unit is the national allowance, so a multi-split may suit a whole-house job.
• Hatch End North and Pinner Central: 48.9% and 33.6% of homes are detached, which allows two units. Pinner’s conservation areas have their own limits, so check your street first.
• Rayners Lane South: 47.9% of homes are terraces, the highest share in Harrow. A mid-terrace usually has no side wall, so the unit goes at the back.
• Greenhill, in HA1: 65.6% of homes in Greenhill South are purpose-built flats, and 26.2% in Greenhill North are flats in converted houses. The freeholder’s yes comes first. What to agree with a freeholder.

Sources: Census 2021, table TS044, the planning order and Harrow’s Local Plan. The census is taken every 10 years.

How hot Harrow gets, and where

Harrow’s hot days match most of London, at about 5 a year above 30C in the Met Office’s figures for 2001 to 2020. Two degrees of global warming would bring about 10, and the range runs from 5 to 15. Around 2C is where the Climate Change Committee sees the world by 2050. What the next decade could bring.

Stanmore is the coolest and leafiest part of the borough, in GLA data. Its summer average for 2018 to 2022 is 17.6C, with 37.5% tree cover. Headstone is warmest, at 18.2C. Edgware and Kenton East have the least shade, at 13% and 14% tree cover.

Half a degree won’t pick your system, but the room will. In a two-storey Harrow semi, the hot room is often a bedroom under the roof, so we size from that room at the survey.

If you rent, your landlord has to agree in writing first. Options if you rent.

Sources: the Met Office climate data portal, the Climate Change Committee (May 2026) and GLA climate risk mapping. The ward averages are ours.

Noise reports for shops and offices

Noise reports are part of a commercial application in Harrow. The council’s business sheet says an application for air con or chiller units needs one, carried out to British Standard BS 4142. The sheet dates from 2012, so confirm it with the planning team before you apply.

The sheet sets out what the report has to show:

• how the units are installed and how they run
• any works needed so they don’t raise background noise or disturb others
• readings at the hours the units will run: day, night or both

The 2026 Local Plan points the same way. Policy GR1 weighs noise, vibration and hours of operation on the people around a site.

The sheet says a competent person should do the work, and points to the Institute of Acoustics to find one. So book the report before you settle on the units. What a commercial job involves.

Sources: Business Information Sheet 5f (2012) and Harrow’s Local Plan, Policy GR1.

Postcodes we cover in Harrow

Five HA postcodes make up most of Harrow:

• HA1: Harrow town centre and Harrow on the Hill
• HA2: South Harrow, West Harrow, North Harrow and Rayners Lane
• HA3: Wealdstone, Kenton, Harrow Weald and Belmont
• HA5: Pinner and Hatch End
• HA7: Stanmore and Canons Park

We also cover the Harrow parts of HA4, HA8, NW9 and WD23, which take in Edgware and Queensbury. Where HA5 and HA7 cross into Hertfordshire, we cover the London parts.

Areas near Harrow

Areas near Harrow are covered as well, so a home in the next borough is no problem. All our London areas.

Map source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

• HA0 HA9 NW10 · Brent

  Wembley

  Wembley, Harlesden, Willesden and Stonebridge.

  See this area

• W5 W13 W3 UB6 · Ealing

  Ealing

  Ealing Broadway, West Ealing, Acton and Greenford.

  See this area

• EN5 N3 N12 N20 · Barnet

  Barnet and Finchley

  High Barnet, Whetstone, North Finchley and Finchley Central.

  See this area

• UB8 UB10 UB3 HA4 · Hillingdon

  Uxbridge

  Uxbridge, Hillingdon, Hayes and Ruislip.

  See this area