Do you need planning permission or landlord consent for commercial air conditioning?
When outdoor air conditioning units on commercial premises need planning permission, listed building consent or landlord approval, and how noise is assessed.
Short answer
Outdoor air conditioning units on commercial buildings often need planning permission — especially on front or visible elevations, in conservation areas and on listed buildings — and councils may ask for a noise assessment. Leased premises almost always need the landlord's written consent for external units and wall penetrations.
Planning permission
Whether planning permission is needed depends on the building, its location and where the outdoor unit goes. Units on a rear flat roof screened from view are less likely to need consent than units on a front elevation. In conservation areas and on listed buildings, consent is very likely to be needed. Check with the local planning authority before work is booked.
Noise
Councils often assess plant noise using BS 4142, comparing the unit's noise at the nearest homes with the existing background level. Choosing quieter units, siting them away from windows, and using screens or acoustic enclosures can help.
Landlord consent
Most commercial leases restrict alterations, external fixtures and roof access without consent. Ask the landlord or managing agent early, and send them drawings, unit data sheets and the method of fixing. Agree what happens to the system at the end of the lease.
Building Regulations
New fixed systems must meet the energy-efficiency standards in the Building Regulations for your nation and be commissioned with records handed over. Electrical work must meet BS 7671.
Questions
Can we install first and apply later?
It is a risk: if consent is refused you may have to remove the units. Apply first where consent is likely to be needed.
Who applies for planning permission?
Usually the occupier or their agent. We can supply drawings and noise data for the application.
Related services
- Commercial air conditioning installation
- HVAC design and heat load surveys
- Split and multi-split systems
- VRF and VRV systems
This guide is general information, not legal advice. Rules can change; check the current position with the relevant authority for your building.