Air conditioning in Lambeth: what you can install and what the grant covers
Lambeth has more conservation areas than any borough on this list — 62 of them, from Clapham to Brixton — yet they cover only about 30% of the borough, so most Lambeth homes sit outside one. Add London's biggest stock of converted Victorian terraces and you get a borough where the answer to "can I install air conditioning?" is usually yes — and the government may pay £2,500 towards a unit that heats too.
See if the £2,500 grant applies to your home — five questions.
Check my eligibilityDo you need planning permission in Lambeth?
Houses outside conservation areas usually don't need it for an air-to-air heat pump: one unit, under 1.5 m³, meeting the MCS noise standard, not above ground level on a street-facing wall.
Lambeth is one of the few councils with a dedicated heat pump planning guidance page, which says the same and recommends discreet rear placements away from neighbours. Cooling-only air conditioning always needs an application. If you're unsure which side of the line you're on, Lambeth suggests a lawful development certificate — your installer can sort that.
Conservation areas in Lambeth
Sixty-two, including Clapham, Kennington, Brixton and Lambeth Palace, plus more than 2,000 listed buildings — the Royal Festival Hall among them.
Because coverage is around 30%, check whether you're actually in one before assuming the worst — most Lambeth streets aren't. Inside one, the usual rule applies: nothing on a street-facing wall or roof without permission; rear placements are the standard route.
Flats and leaseholds
About 75% of Lambeth households are in flats, and a fifth of the borough's homes are conversions — the classic two-flats-in-a-Victorian-terrace.
Conversions bring a specific wrinkle: the freehold is often shared or held by an absent landlord, so getting consent for the external unit is the step to start early. Flats need a planning application too; renters can share their checker result with their landlord in one click.
The £2,500 grant in Lambeth
Around 11–12% of Lambeth households heat with electricity only — panel heaters in conversions, storage heaters in estate blocks.
The £2,500 air-to-air grant is ring-fenced for exactly these homes: properties replacing direct electric heating. Your MCS-certified installer applies through Ofgem and deducts the grant from your bill — there's nothing for you to claim.
See if the £2,500 grant applies to your home — five questions.
Check my eligibilityFrequently asked questions
Do I need planning permission for air conditioning in Lambeth?
Most Lambeth houses don't for an air-to-air heat pump, since about 70% of the borough is outside its conservation areas. Cooling-only units always need permission; flats need an application plus freeholder consent.
Can I install air con in a Lambeth conservation area?
Usually yes, placed to the rear and out of sight of the street. Lambeth has 62 conservation areas including Clapham, Brixton and Kennington, and its heat pump guidance recommends discreet rear placements.
Can flats in Lambeth get the £2,500 grant?
Yes, if the flat replaces direct electric heating. In Lambeth's many Victorian conversions the practical step is freeholder consent — start that conversation early.
Who applies for the grant?
Your MCS-certified installer applies to Ofgem on your behalf and deducts £2,500 from your quote. You never fill in a government form.
Nearby
Useful links
SOURCES
Lambeth conservation area profiles
Lambeth ASHP retrofit guidance
ONS Census 2021 (E09000022)
legislation.gov.uk GPDO Part 14 Class G
Local information is indicative. Confirm planning and costs with an MCS-certified installer for your address, and check the current Ofgem guidance for the Boiler Upgrade Scheme.