New build and renovation air conditioning across County Londonderry
First-fix pipework in Derry/Londonderry extensions goes in while the joists and studs are open. For new Derry/Londonderry extensions with flat roofs, the outdoor unit position is best agreed against the architect's drawings. Damp Northern Ireland winters make a heat pump's dehumidifying mode useful well beyond the summer.
Prices in County Londonderry
Air conditioning for new builds and renovations in County Londonderry typically comes in at £365–£795 per indoor position (first fix) including VAT, based on Northern Ireland rates. It is a touch below the UK middle, as trade rates in Northern Ireland tend to be. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. Typical First and second fix work (complete install priced per room including units) lands around £1,345–£2,695 in this area.
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
First-fix work is about coordination, while the outdoor unit follows the normal planning rules for the property.
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
Included with air conditioning for new builds and renovations across County Londonderry:
- Vacuum, charge and commissioning
- Commissioning records for building control files
- First-fix pipework, drains and cables
- Second-fix unit installation
- Nitrogen pressure test and labelled tails
- Design and setting-out with your builder
Towns in County Londonderry
Pick your town for local details, or see every service in County Londonderry.