Flats & Leasehold Apartments: Solar panels for landlords

Why solar for rental flats is a shared-roof, communal-supply question

Flats and leasehold apartments are the hardest part of the private rented sector to upgrade, and the EPC band C by 2030 deadline confirmed in the Warm Homes Plan applies to them just as it does to houses. The complication is ownership: an individual leasehold flat rarely owns its roof, so a flat-by-flat rooftop array is usually not on the table. For a landlord, solar panels on rental flats are really a communal-scheme question, decided at the level of the freeholder, the residents management company or the managing agent, not by the individual leaseholder. That is a very different conversation from a buy-to-let house, and it is one most installers will not have because it does not fit a simple per-roof sales model.

The framing that works for flats is the communal landlord supply. Where there is a shared array serving the landlord-supply areas, lifts, stair and corridor lighting, water pumps and door entry, the landlord is effectively the bill payer for that supply, so self-consumption returns real cash and the split-incentive problem that dogs single lets largely disappears for the communal load. Solar for rental flats therefore works best as a building-level project, often funded through a service-charge recovery model, that lifts the block toward compliance while cutting the communal electricity bill the leaseholders and landlord ultimately fund.

It helps to separate the two distinct positions a landlord can be in with flats, because the right approach is different for each. If you own a single leasehold flat within a block you do not control, your options are constrained: the roof is not yours to use, so an individual array is rarely possible, and your realistic route to band C for that flat leans on fabric measures and low-carbon heating inside the dwelling, with solar entering only if the freeholder runs a communal scheme. If, on the other hand, you are the freeholder or you control the block through a residents management company, you are in a far stronger position, because you can commission a communal array, decide how its output is metered, and recover the cost through the service charge where the leases allow. Recognising which of these two you are is the first step, and it changes the whole conversation from one about a single roof to one about a building.

What a typical install looks like and how we size it

For flats the system sits on the shared roof and is sized to the communal scheme rather than to any single dwelling, so the panel count, roof area and generation all vary with the block. As an indicative cost, a communal array works out at roughly 800 to 3,000 pounds per flat as a share of the scheme, with a typical payback nearer 12 years because the benefiting load (communal services) is steadier but smaller than a whole-house demand. We size to the communal landlord-supply load first, because that is the demand that delivers a cash return through self-consumption, and we establish exactly which meter (landlord supply versus individual tenant supplies) the generation feeds, since that governs who benefits. Communal supply metering is the single most important technical fact in a block scheme, and we confirm it before we design anything.

Costs, payback and tax relief

Because flats are costed at the scheme level, the economics turn on how the communal supply is metered and on the service-charge recovery model used to fund the array. A communal array offsetting lift, lighting and pump load returns a genuine saving against a bill the building already pays, and the Smart Export Guarantee covers any surplus exported from the communal system. On tax, the same ownership rule applies as elsewhere: a personally-held residential let cannot claim capital allowances on the panels (the furnished holiday let regime and its allowances were abolished from April 2025, leaving only Replacement of Domestic Items Relief), whereas a freeholder or landlord entity held as a limited company may be able to use the Annual Investment Allowance on qualifying plant. Service-charge recovery, where the lease permits it, can spread the capital cost across leaseholders. Always confirm both the tax position and the recoverability with your accountant and the lease. Our cost guide sets out the per-flat economics.

Funding routes in detail

The Smart Export Guarantee applies to communal arrays as it does to single systems, paying typically 3 to 15p per kWh for exported surplus to the named account holder. Where individual tenants in the block qualify, ECO4 (to December 2026) can fund insulation and heating measures inside their flats at no cost to the tenant, with landlord consent, and the Warm Homes: Local Grant (to 31 March 2028) lets a privately renting tenant on a household income of 36,000 pounds or less in an EPC D to G flat apply through the local authority with your permission. These tenant-led schemes target the individual dwellings rather than the communal array, but they help the block as a whole toward band C. For an incorporated freeholder or landlord company, capital allowances are the tax route on the communal solar spend itself.

Compliance and sector considerations

The defining compliance hurdle for flats is consent. Leasehold consent and freeholder or managing-agent agreement are required, and solar is one of the improvements government explicitly cites as needing third-party consent. Where consent is refused despite genuine best efforts, a five-year third-party-consent MEES exemption can be registered on the PRS Exemptions Register, which buys time but is a backstop, not a strategy. Flats and maisonettes also have tighter Permitted Development rules than houses, so planning needs checking carefully. On top of the domestic MEES regime (EPC C by 2030 with the 10,000 pound cap), an MCS-certified install is needed for SEG eligibility, Part P (electrical) applies, and a communal array above 3.68 kW per phase will need a DNO G99 application submitted before installation. As always, fabric measures move the new fabric-based EPC more than PV per pound, so we model the least-cost whole-building route to C.

It is worth being realistic about how the cost cap and exemptions interact for a leaseholder landlord who does not control the roof. If a communal solar scheme is genuinely outside your control because the freeholder will not run one, your route to band C for an individual flat rests on the fabric and heating measures you can carry out inside your own demise, and you are expected to spend up to the 10,000 pound cap on those before any all-improvements exemption applies. The third-party-consent exemption is not a way to avoid spending altogether; it is a five-year, evidenced backstop specifically for the measures that genuinely need someone else's permission. We are clear about this distinction because some landlords assume the leasehold structure lets them claim an exemption and do nothing, and it does not. The sensible plan for a leasehold flat is to do the in-demise measures that count, press properly for communal consent where solar could help the block, and keep the exemption in reserve for the case where consent is genuinely refused.

How we approach this kind of project

We start by establishing who pays the communal electricity bill and how the landlord supply is metered, because that decides whether and how solar returns cash in a block. We then engage the freeholder or managing agent early, because consent is the long pole on flats, and we document the consent trail so that a PRS Exemptions Register fallback is available if it is refused. We model the EPC route for the dwellings alongside the communal array, size the system to the landlord-supply load for self-consumption, and check the roof loading and any asbestos before quoting. We submit the G99 application early where the array needs it, provide a fixed-price proposal for the scheme, and back the work with an insurance-backed warranty. Where a service-charge recovery model is used, we provide the figures the managing agent needs.

The consent trail deserves particular care on flats, because it is both the most likely thing to stall an install and the route to a legitimate fallback if it does. We put the request to the freeholder or managing agent in writing, set out the scheme clearly, and keep a dated record of the approach and any response. If consent is granted, that paperwork supports the install and the service-charge recovery. If it is refused, or comes back with conditions that make the scheme unworkable, the same record is the evidence you need to register a five-year third-party-consent exemption on the PRS Exemptions Register, because solar is one of the improvements government explicitly recognises as needing third-party consent. Either way you are not left exposed: you have either delivered a communal array that moves the block toward band C and cuts the communal bill, or you have a properly evidenced exemption that protects you while you keep trying. That is a very different outcome from an installer who quotes a roof, finds it is not the landlord's to use, and walks away.

An illustrative example

As an illustrative composite based on typical UK block schemes: a freeholder landlord controlling a small purpose-built block of flats with lifts, stair lighting and a communal pump faced a steady communal electricity bill and a set of leasehold flats sitting below band C. A communal rooftop array sized to the landlord-supply load offset a large share of the lift, lighting and pump demand during the day, returning a real saving against a bill the building already paid, with surplus exported under the SEG to the freeholder account. Consent was straightforward because a single freeholder controlled the roof, and the per-flat cost was recovered through the service charge where the leases permitted. The communal scheme was paired with targeted fabric measures in the individual flats to move them toward band C. The figures are illustrative and depend on the block, the metering arrangement, the lease terms and the tariff.

If you also hold houses or licensed HMOs, see solar for buy-to-let houses and solar for HMOs. When you are ready, see the cost guide, the grants and funding options, or request a free feasibility, and read the landlord solar FAQs first.