Garden room and home office air conditioning in Eltham
London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset. For a garden room in Eltham, the outdoor unit usually sits on a small stand behind the building.
Garden offices used every day in Eltham need cooling in summer and efficient heat in winter. Eltham lies roughly 8 miles from central London, and we cover it as part of London. Postcode districts we cover here include SE9.
Prices in Eltham
Budget around £1,895–£4,145 per system including VAT for garden room and home office air conditioning in and around Eltham. 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 Popular option (3.5 kW unit with Wi-Fi to warm up before you walk down the garden) would typically be £2,345–£3,245 here.
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. On a survey in Eltham 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
What a job in Eltham covers:
- Free survey including the garden room's electrics
- Short pipe run to a ground-mounted outdoor unit
- Pressure test, vacuum and commissioning
- Handover and timer set-up for working hours
- Fixings into frame or solid sections
Nearby
Neighbouring places we cover include Blackheath (2 miles), Welling (3 miles) and Catford (3 miles). See all services in Eltham or garden room and home office air conditioning across London.