New build and renovation air conditioning in Westminster
Renovations in Westminster are the easiest jobs to make invisible, because the pipework goes in before the plaster. London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset.
For new Westminster extensions with flat roofs, the outdoor unit position is best agreed against the architect's drawings. Westminster is part of our London coverage. We cover SW1A, SW1E, SW1H, SW1P, SW1V and SW1W and the streets around them.
Prices in Westminster
Air conditioning for new builds and renovations in Westminster typically comes in at £495–£1,195 per indoor position (first fix) including VAT, based on 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. As an example, the First and second fix option (complete install priced per room including units) would typically be £1,895–£3,895 here.
First fix only
Pipework and drains to each position for a later install.
First and second fix
Complete install priced per room including units.
Ducted design and build
Concealed ducted system designed into the build.
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%.
Working with your builder
On build projects the main thing is timing with your builder and electrician; we fit first-fix pipework before plastering and agree the outdoor unit position early.
The survey
Surveys in Westminster cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. 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.
What is included
Included with air conditioning for new builds and renovations in Westminster:
- Second-fix unit installation
- First-fix pipework, drains and cables
- Vacuum, charge and commissioning
- Commissioning records for building control files
- Nitrogen pressure test and labelled tails
Nearby
Nearby, we also cover Chelsea (2 miles), Battersea (2 miles) and Brixton (3 miles). See all services in Westminster or new build and renovation air conditioning across London.