How the estimate is built
The calculator follows the July 2026 commercial cost guide: a simple single-zone office or shop comfort install may sit around £2,500 to £6,000 including VAT in many UK situations, with London and multi-zone projects often higher. Premises type changes the base band, extra zones add further allowance, and checked extras cover out-of-hours work, access, electrics, controls, landlord process and complex distribution.
What this does not cover
- Large VRV or VRF campuses and full plant rooms
- Server rooms or continuous IT process cooling. Use the server room cooling cost calculator
- Kitchen extract systems, major builder works or decorative fit-out
- A guaranteed price from any installer
Read the commercial installation cost guide, or start with the commercial air conditioning service overview.