Ducted air conditioning in the UK is priced by the building, not the box. As a 2026 planning illustration, a single concealed unit serving two or three rooms through short duct runs often lands in the mid thousands of pounds installed, a whole floor of a house commonly runs high single figures to low tens of thousands, and office fit-outs scale with ceiling grid and controls. The equipment is a minority of the bill: access to ceiling voids, duct fabrication, grilles, condensate routing and making good drive the labour. Ducted wins where voids already exist; it loses badly where ceilings must come down.
Why ducted quotes spread so widely
A wall split is a product with fitting. Ducted is light construction work: a concealed fan coil above a ceiling, supply and return ducts, insulated runs, balanced grilles, a condensate route with falls or a pump, and an outdoor unit sized for the whole load.
Two identical houses can quote thousands apart purely on void depth and access. A 1930s house with deep joists and a loft above takes ducts easily. A modern flat with 150 mm of void and services already in it may be a wall split job wearing a ducted brief.
- Void depth and access decide feasibility before any equipment is chosen.
- Each room served adds duct, grille and balancing labour.
- Condensate from a ceiling void usually means a pump and an overflow plan.
- Controls with per-room zoning add cost and are worth it in bedrooms.
- Making good ceilings after first fix is a real line, not a rounding error.
Illustrative price bands
As July 2026 illustrations rather than quotes: one concealed unit cooling a large open plan space or two adjacent rooms sits around the mid thousands installed. Three to five rooms from one system commonly reaches the high thousands. A full house with zoning, long runs and two systems moves past ten thousand. London access, parking and out-of-hours work push every band upward.
Compare against the alternative honestly: three wall splits on a multi outdoor unit may cool the same rooms for less where walls are available. The ducted premium buys invisibility and even air distribution, not more cooling per pound.
Where the money hides
Duct fabrication and fitting time, attenuators where bedrooms need silence, fire compartment penetrations done properly, and the electrician's day. The concealed unit itself is often cheaper than the visible premium wall units it replaces.
Read the ducted air conditioning guide for the system design side, and the installation cost guide for how UK labour rates build up. Brand price pages for Daikin and Mitsubishi ducted ranges cover equipment differences.
Getting a quote that will not move
A ducted survey that skips the loft or void inspection produces a price that changes later. Insist the surveyor physically checks void depth, notes the condensate route, and states grille positions per room in writing.
Use the quote form with room count and ceiling type. Local companies familiar with concealed work respond with survey-first pricing rather than guesses.
Frequently asked questions
How much does ducted air conditioning cost in the UK?
As a 2026 illustration: mid thousands of pounds installed for a single concealed unit serving two or three spaces, high thousands for most of a floor, and beyond ten thousand for whole-house zoned systems. Void access and duct labour, not the equipment, set the number.
Is ducted cheaper than multiple wall units?
Rarely. Wall splits on a multi outdoor unit usually cool the same rooms for less. Ducted is bought for concealment, even airflow and silence in the room, and it only competes on price where deep voids make duct runs quick.
Can ducted air conditioning be retrofitted to a UK house?
Yes where there is a loft above bedrooms or generous ceiling voids, which is why bungalows and top floors retrofit well. Solid mid-floor ceilings with shallow voids usually push the job to wall or floor units instead.
Core buying guides
Start with these high-intent guides, then dig into the rest of the library.
Related guides
Sources and further reading
How this guide was prepared
This guide was written by the Local AC Installers Editorial Team. We compare official guidance, legislation and established consumer information, separate general information from project-specific advice, and show publication dates and sources. We do not accept installer accreditation claims at face value.