Air conditioning for extensions and kitchen-diners in Trowbridge
For a kitchen-diner in Trowbridge, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. In the South West, a system that heats well through damp winters is often as valuable as summer cooling.
An extension in Trowbridge with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. We cover Trowbridge as part of Wiltshire, roughly 25 miles from Swindon. That includes the BA14 postcode district.
Prices in Trowbridge
Our South West England guide price for air conditioning for extensions and kitchen-diners is £1,450–£4,450 per space, VAT included. That is broadly in line with national guide prices. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. Typical Large single work (one 5–7 kW unit for a large glazed space) lands around £2,050–£2,850 in this area.
Single unit
One 3.5–5 kW unit for a medium extension.
Large single
One 5–7 kW unit for a large glazed space.
Twin units
Two indoor units on a multi-split for long or L-shaped spaces.
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
On a survey in Trowbridge 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. 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 as standard in Trowbridge:
- Handover of the remote or app
- Free survey with glazing and roof heat-gain check
- Placement clear of the hob and oven
- Pressure test, vacuum and commissioning
- Hidden routes during the build, or neat surface routes after
Nearby
We also cover Bath (8 miles), Frome (8 miles) and Warminster (8 miles). See all services in Trowbridge or air conditioning for extensions and kitchen-diners across Wiltshire.