Air Conditioning in Flats and Leasehold Properties

Start with consent, not equipment

In a leasehold flat, the external walls, roof and balcony structure usually belong to the freeholder. Fixing anything to them, or penetrating them, needs written consent — typically a licence for alterations.

Get that conversation started before you get quotes. It is the long pole in the timeline, and no installer can shortcut it.

• Written freeholder or management company consent
• Check the lease for alteration and nuisance clauses
• Planning permission is more likely to be needed than for a house
• Building insurance and any block noise policy

Where the outdoor unit can go

Balconies, dedicated plant areas, flat roofs with access, or a bracket on a rear elevation are the common options. Whatever the location, it needs airflow, safe servicing access and acceptable noise at neighbouring windows.

Ground-floor flats can sometimes use a small ground stand in a private outdoor area with the freeholder's agreement.

When external plant is banned outright

Some leases and some new-build management schemes prohibit external units entirely. Options then narrow to comfort cooling that does not need a condenser outside — which in practice means compromise on performance and, often, portable equipment.

We will tell you honestly if we do not think a compliant installation is possible, rather than selling you something that causes a dispute.

Practical installation issues in blocks

Lift bookings, permitted working hours, parking for the van, protection of communal areas and waste removal all need arranging. We handle the logistics but need a few details from you or the managing agent.

Concrete structures need core drilling with the right kit, and structural elements must not be drilled without approval.