Ducted air conditioning in Westminster
In an older house in Westminster, the loft and any existing bulkheads decide whether a ducted layout will work. London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset.
Ducted systems suit Westminster loft conversions and new extensions where ceilings are being boarded anyway. Westminster is part of our London coverage. We cover SW1A, SW1E, SW1H, SW1P, SW1V and SW1W and the streets around them.
Prices in Westminster
For Westminster, expect roughly £7,195 to £19,745 per system, VAT included, adjusted for typical London rates. London is one of the dearer parts of the UK for trades, which shows in the range. The biggest variables are the pipe route, access for the outdoor unit and the state of the consumer unit, all of which the survey settles. Typical Zoned work (motorised dampers or two units for separate floors or room groups) lands around £9,845–£14,445 in this area.
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
For most houses in Westminster, the outdoor unit is permitted development if it passes the MCS 020(a) noise check (37 dB(A) or less at the nearest neighbouring window) and stays within the size and number limits. We run that check on survey.
The survey
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. On a survey in Westminster the engineer looks at room size, glazing, the route for pipes and drains, the electrics and where the outdoor unit can sit quietly, then the written quote follows.
What is included
Included as standard in Westminster:
- Free survey with ceiling-void and loft inspection
- Commissioning with airflow balancing per grille
- Insulated ductwork, plenums and grilles
- Access hatch and condensate route planned in
- Wall controller or app control
Nearby
Nearby, we also cover Chelsea (2 miles), Battersea (2 miles) and Brixton (3 miles). See all services in Westminster or ducted air conditioning across London.