Air conditioning for extensions and kitchen-diners in Hertford
Low rainfall and long summer days in the East of England make south-facing rooms the first to overheat. In Hertford, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
An extension in Hertford with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Hertford is about 17 miles from Watford and falls within our Hertfordshire coverage. Homes in SG13 are all within our coverage.
Prices in Hertford
Guide prices around Hertford run from £1,595 to £4,995 per space including VAT. The East of England is one of the dearer parts of the UK for trades, which shows in the range. 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 £2,295–£3,195 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
England's rules let most houses fit an outdoor unit without a planning application, as long as the size, number and MCS 020(a) noise conditions are met. Flats, listed buildings and roof-mounted units are treated differently.
The survey
A survey in Hertford usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes. 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.
What is included
Here is what is included on every job in Hertford:
- Free survey with glazing and roof heat-gain check
- Hidden routes during the build, or neat surface routes after
- One or two units sized for the whole space
- Handover of the remote or app
- Pressure test, vacuum and commissioning
Nearby
If you are just outside Hertford, we also work in Hoddesdon (4 miles), Welwyn Garden City (6 miles) and Hatfield (7 miles). See all services in Hertford or air conditioning for extensions and kitchen-diners across Hertfordshire.