Horsham is one of the most active air conditioning installation markets in West Sussex — the town’s prosperous demographic, mix of older and newer properties, and growing business sector create consistent demand for both residential and commercial installations. Here is what you can expect to pay in Horsham in 2026.
Typical Costs for Horsham Installations
| System Type | Typical Installed Cost |
|---|---|
| Single room split system | £1,200 – £2,000 |
| 2-room multi-split | £2,800 – £4,500 |
| Whole-house system (3-5 rooms) | £4,500 – £8,500 |
| Commercial (Foundry/business parks) | £2,000 – £25,000 |
| Annual service | £95 – £150 |
Horsham Town Centre Properties
Horsham’s town centre has a high concentration of Victorian and Edwardian commercial buildings along the Carfax, East Street and North Street. These older properties typically have solid brick walls requiring core drilling, which adds modestly to installation cost and time compared to cavity wall properties. The conservation area covering much of the town centre requires careful outdoor unit positioning — rear or side elevations away from the street frontage are the standard approach.
New Build Developments
Horsham has seen significant new residential development in recent years, including the large Horsham development sites to the north and east of the town. Modern new-builds have cavity wall construction (quicker and cheaper to install into) and many are now being specified with air conditioning provision — electrical connections and wall penetrations pre-installed during construction. If you are in a recently built property, check whether provision exists before getting quotes — it can save £200-400 on installation.
The Foundry Quarter
Horsham’s Foundry commercial quarter and the surrounding business parks house a mix of professional services, technology and healthcare businesses that require air conditioning for both staff comfort and equipment cooling. We cover Horsham commercial premises regularly and understand the access and planning requirements for installations in this area.
Recent Horsham Installations
Victorian semi, Hurst Road RH12: LG two-room system — master bedroom and living room. Solid brick wall, external pipework run in matching painted trunking. Total: £3,200.
Dental practice, North Street RH12: Daikin two-room system — consulting room and reception. Out of hours installation. Total: £3,800.
New-build detached, Horsham north development: Samsung three-room system utilising pre-installed provisions. Faster installation than standard retrofit. Total: £4,200.
Call 07833 053749 or request a free survey in Horsham. We are based in East Grinstead, 20 minutes from Horsham.