Can I get a heat pump if I own a leasehold flat?

Possibly, but you need your freeholder's (or the resident management company's) written consent before fitting anything on the exterior — a wall-mounted or ground-standing outdoor unit almost always needs a licence to alter, since most leases restrict external changes. If you've exercised the Right to Manage, the RTM company can grant this itself. Start with your lease and management company, not your installer.

Does the Boiler Upgrade Scheme cover flats?

Yes, in principle — flats aren't excluded from BUS, and the same £7,500 grant applies. In practice, eligibility depends on the flat having (or being able to have) its own dedicated heating system with somewhere lawful to site an outdoor unit. A flat on a shared communal heating system generally can't apply individually — the grant would need to fund a change to the whole building's heat source, decided by the freeholder or management company, not a single leaseholder.

What if my block has communal heating — can I opt out and get my own?

Usually not in practice, even though it isn't technically forbidden. Communal systems supply every flat from one central plant through a shared network, and disconnecting one flat typically requires structural, legal and cost-sharing changes that need the freeholder's or management company's agreement — rarely granted for a single unit. The realistic path is to raise a whole-building heat pump conversion at the next lifecycle replacement point for the communal plant.

Can I install an air-to-air heat pump instead of a normal ("air-to-water") one?

It's the most common workaround for flats without room for a hot water cylinder — air-to-air systems look and install like reverse-cycle air conditioning, needing only a small outdoor condenser and wall-mounted indoor units. The trade-off: they heat air directly, not water, so they don't provide domestic hot water and aren't eligible for the £7,500 BUS grant, which is restricted to systems that heat water for a wet central heating circuit.

What if I genuinely have no outdoor space at all?

A private heat pump usually isn't feasible for a mid-block flat with no balcony, no allocated garden, and no accessible roof or plant area — there's no lawful place to site the outdoor unit. Realistic options are efficient direct electric heating in the meantime, or lobbying your freeholder or management company to consider a communal heat pump system at the block's next major refurbishment.

Is noise a bigger issue for flats than houses?

The regulatory noise limit is the same, but flats raise practical issues houses don't: shared walls and floors mean vibration through the building structure can be more noticeable than airborne sound, and a unit on a balcony sits much closer to neighbours above and below than a garden installation would. An anti-vibration mounting and a model chosen for quiet running matter more in a block — see our dedicated noise guide.

Heat Pump in a Flat UK: Leasehold, Communal Heating & No Outdoor Space

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Compact air-to-water heat pump outdoor unit mounted on a UK flat balcony, purpose-built bracket, city apartment block in background

A flat with its own balcony and an individual gas system is the easiest case. Communal heating and shared-wall blocks are harder.

Whether a flat can get a heat pump depends on three things, in order of importance: whether your lease and freeholder will consent to external plant, whether the block already has communal heating you can't unilaterally leave, and whether there's anywhere lawful to put an outdoor unit. Get those three answered before you get a quote — they decide the outcome more than the technology does.

Three flat heating setups, three different answers

UK flats broadly fall into one of three arrangements, and the heat pump route differs for each.

Own gas combi

Most converted period properties and smaller purpose-built blocks. Each flat has its own boiler. An individual heat pump retrofit is realistic if there's outdoor space and freeholder consent.

Communal heating

Common in larger purpose-built blocks and modern developments. One central plant serves every flat via a heat network. An individual leaseholder can't switch away — it's a whole-building decision.

Storage heaters / electric

No wet central heating circuit at all. A full heat pump retrofit means adding radiators or underfloor pipework from scratch — a bigger job, or a case for air-to-air instead.

Leasehold consent: start here, not with an installer

Almost every lease restricts alterations to the exterior of the building and to shared structures — walls, balconies, roofs, and communal grounds are typically owned by the freeholder, not you, even where you have exclusive use of a balcony. Fitting an outdoor condenser unit almost always needs the freeholder's or resident management company's written consent, usually formalised as a licence to alter. Skipping this and installing anyway is a lease breach that can be enforced regardless of any planning permission you hold.

If your block has exercised the Right to Manage (RTM), the RTM company can grant consent itself without going back to the freeholder — often a faster route. If not, contact the managing agent early; getting a licence to alter agreed can take weeks, and some freeholders will want to see the installer's method statement and evidence of adequate noise assessment before agreeing.

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Communal heating plant room in a UK apartment block basement showing shared boilers feeding a district heat network to individual flats

Where a block runs communal heating, the heat source is a whole-building decision — not something an individual leaseholder can change alone.

Communal heating: why you usually can't opt out

If your flat is on a shared heat network — you'll typically have a heat interface unit rather than a boiler, and a heating bill from the building's management company rather than a direct energy supplier — an individual switch to your own heat pump is rarely practical even where it's not explicitly forbidden. The network's pipework, metering and plant are shared infrastructure; disconnecting one flat has cost, insurance and structural implications for everyone else on the system, and most leases and management arrangements require agreement from the freeholder or a majority of leaseholders for that kind of change.

The realistic path if you're unhappy with a gas-fired communal system is to raise a whole-building conversion with your management company or residents' association, typically timed around when the existing plant is due for lifecycle replacement — communal-scale heat pumps replacing central gas plant are increasingly common in block refurbishments, and separate government support exists specifically for heat network decarbonisation, distinct from BUS. Ask your managing agent whether they've looked into it.

No cylinder space? Air-to-air is the common workaround

A standard ("air-to-water") heat pump needs a hot water cylinder — typically 150–250 litres — which many flats simply don't have room for. Air-to-air heat pumps avoid this: they work like reverse-cycle air conditioning, with one or more small wall-mounted indoor units connected to a compact outdoor condenser, heating (and cooling) the air in each room directly.

The BUS catch

Air-to-air systems are not eligible for the £7,500 Boiler Upgrade Scheme grant. BUS is restricted to systems that heat water for a wet central heating circuit — air-to-water ASHP and ground source. If you go air-to-air, you're paying the full install cost with no grant offset, and you'll still need a separate way to heat domestic hot water (electric shower, point-of-use heater, or an existing immersion cylinder if you have one).

Air-to-air is usually a smaller job — no cylinder, no radiator upgrades, less internal disruption — which can make it the pragmatic choice for a flat even without the grant, particularly one already on electric storage heating with no wet circuit to convert.

No outdoor space at all

Some flats genuinely have nowhere lawful to put an outdoor unit — no balcony, no allocated garden, no accessible roof or plant deck, and a management company unwilling to allow shared grounds to be used. In that situation, a private heat pump usually isn't realistic under current UK equipment, air-to-water or air-to-air. Your options are limited to efficient direct electric heating for now, or making the case to your freeholder or management company for a communal solution at the building level — which is a longer conversation but is where the bigger carbon and cost savings for the whole block usually sit anyway.

Noise and vibration matter more in a block

The legal noise limit that applies to a heat pump's outdoor unit doesn't change because you're in a flat, but the practical risk of nuisance is higher. A balcony-mounted unit sits far closer to a neighbour's window, above or below, than a typical garden installation would, and vibration transmitted through a shared structural wall or floor slab can be more noticeable than the airborne sound itself — even when the unit is technically compliant. Insist on an anti-vibration mounting base, ask your installer for the specific model's sound power data before committing, and see our dedicated heat pump noise guide for the detail on siting and the regulatory limit.

Access and logistics: the part that surprises people

Installing in a block raises practical questions a detached house never faces. Does the outdoor unit need to travel through a communal lift or stairwell, and does the management company require a method statement before contractors can work in shared areas? Are there restricted working hours in the lease or house rules that limit when noisy drilling can happen? Is scaffolding or a cherry picker needed to reach a wall-mounted position on an upper floor, and who's liable if communal areas are marked or damaged during the work? None of these rule out a heat pump, but they add cost and lead time a house installation doesn't carry — get your installer to itemise them in the quote rather than discovering them once work has started, and check whether your service charge or building insurance has any bearing on works of this kind.

Documentation your installer will need

Written freeholder or management company consent (the licence to alter)
Confirmation of who owns the balcony, wall or ground area proposed for the unit
Evidence the flat has (or will have) its own dedicated heating circuit, if applying for BUS
A current EPC for the flat, as with any BUS application

A competent MCS installer will ask for these before quoting seriously — if one doesn't, that's worth querying, because an installation without the underlying consent can be unwound at your cost later.

The bottom line

Flats aren't excluded from heat pumps or from BUS, but the path there runs through your lease and your management company before it runs through any installer. An individually owned system with its own gas boiler today, a balcony or garden, and a cooperative freeholder is a straightforward case. Communal heating and mid-block flats with no outdoor access are the genuinely hard cases — and for those, air-to-air or a whole-building conversation is usually the realistic route, not an individual air-to-water retrofit.

Check the general rules against your situation with the 60-second BUS eligibility checker, and compare air source against the alternatives in our air source heat pumps guide — ground source is rarely realistic for a flat given the land it needs, covered in our ground source guide for completeness.