Garden room and home office air conditioning in Chiswick
Garden offices used every day in Chiswick need cooling in summer and efficient heat in winter. In London, heat soaks into brick and concrete during the day and comes back out at night, which is when it is hardest to sleep.
We check the armoured supply cable on every Chiswick garden room before quoting. Our London coverage takes in Chiswick, about 6 miles from central London. Coverage includes W4.
Prices in Chiswick
For Chiswick, expect roughly £1,895 to £4,145 per system, VAT included, adjusted for typical London rates. That is above the UK middle, mainly because labour and access cost more in London. What moves a quote in Chiswick up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. For reference, the Popular option in Chiswick (3.5 kW unit with Wi-Fi to warm up before you walk down the garden) usually comes to about £2,345–£3,245.
Essential
2.5 kW unit for a small office pod.
Popular
3.5 kW unit with Wi-Fi to warm up before you walk down the garden.
Premium
5 kW unit for a large studio or gym, or concealed routing.
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
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. 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
What a job in Chiswick covers:
- Handover and timer set-up for working hours
- Free survey including the garden room's electrics
- Fixings into frame or solid sections
- Short pipe run to a ground-mounted outdoor unit
- Pressure test, vacuum and commissioning
Nearby
Neighbouring places we cover include Acton (1 mile), Barnes (1 mile) and Shepherds Bush (2 miles). See all services in Chiswick or garden room and home office air conditioning across London.