Ducted air conditioning in Harrow
The urban heat island effect means London bedrooms can stay uncomfortably warm on summer nights. For a renovation in Harrow, the best time to plan ducted cooling is before the plasterers arrive.
In an older house in Harrow, the loft and any existing bulkheads decide whether a ducted layout will work. Harrow is about 10 miles from central London and falls within our London coverage. Coverage includes HA2.
Prices in Harrow
Budget around £7,195–£19,745 per system including VAT for ducted air conditioning in and around Harrow. London is one of the dearer parts of the UK for trades, which shows in the range. What moves a quote in Harrow up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. For reference, the Zoned option in Harrow (motorised dampers or two units for separate floors or room groups) usually comes to about £9,845–£14,445.
Single zone
One ducted unit serving two or three rooms from a loft or void.
Zoned
Motorised dampers or two units for separate floors or room groups.
Whole home
Multiple ducted units with linear slot diffusers and smart control.
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
The free survey is where the real price is set: room measurements, pipe and drain routes, electrical checks and the outdoor unit position, all written into your quote. At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote.
What is included
Included as standard in Harrow:
- Concealed fan unit and outdoor unit sized to the zone
- Free survey with ceiling-void and loft inspection
- Access hatch and condensate route planned in
- Insulated ductwork, plenums and grilles
- Commissioning with airflow balancing per grille
Nearby
Close to Harrow, our coverage also includes Wembley (2 miles), Northolt (3 miles) and Greenford (4 miles). See all services in Harrow or ducted air conditioning across London.