Solar panels for landlords, FAQs

Not specifically solar, but the Warm Homes Plan confirmed on 21 January 2026 that every privately rented home in England must reach EPC band C by 1 October 2030, subject to a £10,000-per-property cost cap. Solar is one of several routes to get there. For many D and E-rated properties, a 3-4 kW solar array combined with insulation is the most cost-effective package that clears band C, but you could also use fabric measures and low-carbon heating alone. Improvements made from October 2025 count toward the cost cap.

It depends on who pays. In a standard single let where the tenant pays, you do not get the energy-bill saving, the value to you is the EPC band uplift toward the 2030 deadline, higher and more defensible rent, lower voids, SEG export income (which the named account holder keeps), and resale/refinance value. In a bills-inclusive HMO or a communal-supply building where you pay the energy, self-consumption returns real cash and the payback is far better. Always work out who pays the bill before deciding on size.

A standard 3-4 kW array on a buy-to-let house is roughly £5,000-£9,000 fully installed in 2026. HMOs with larger shared loads run £7,000-£14,000 for a 4-8 kW system, and a battery (worth it mainly when the landlord pays the bills) adds £2,500-£5,000. Mixed-use buildings with a commercial floor can take a 5-15 kW array at £8,000-£25,000. We size to the EPC model and to who pays the bill, not to a homeowner's usage profile.

Yes, but less than insulation does under the new fabric-based EPC introduced with the Warm Homes Plan. PV adds points for on-site renewable generation, which helps push a D toward C, but fabric measures (loft, cavity or solid wall insulation, glazing) move the band more per pound. The right approach is a whole-house plan: model the cheapest combination of fabric measures and solar that clears band C inside the £10,000 cap. Solar's advantage is that it generates real energy and income regardless of future EPC methodology changes.

Yes. The Boiler Upgrade Scheme is open to all property owners in England and Wales, including private and portfolio landlords, at £7,500 for an air source or ground source heat pump (rising to £9,000 for off-gas oil/LPG homes from July 2026) and £2,500 for an air-to-air heat pump from April 2026. You can claim one grant per property with no cap on the number of properties, and from 28 April 2026 the previous EPC eligibility requirement was removed. The install must be by an MCS-certified installer replacing a fossil-fuel system. It pairs well with solar on off-gas rural lets.

It depends on how you hold the property. If your portfolio is in a limited company (SPV), solar is qualifying plant and machinery and the company can use the Annual Investment Allowance (100% relief up to £1m) and potentially the 50% First Year Allowance. If you hold the property personally as a residential let, you cannot, the furnished holiday let regime and its capital allowances were abolished from April 2025, leaving only Replacement of Domestic Items Relief for furnishings. Always confirm with your accountant, as it turns on your ownership structure.

The split incentive is the core obstacle: the landlord pays the capital cost of the panels, but where the tenant pays the electricity bill, the tenant captures the energy saving. This is why the homeowner sales pitch ('your bills will fall') does not work for most lets. The solution is to value the things that do accrue to the landlord, the EPC C compliance, rent and lettability, SEG export income, and asset value, and to recognise that in bills-inclusive HMOs the split incentive disappears entirely because the landlord is the bill payer.

Usually yes. Leasehold flats and shared-roof properties need the freeholder's or managing agent's consent, and solar is one of the improvements government explicitly cites as needing third-party consent. If you make genuine best efforts and consent is refused or comes with unworkable conditions, you can register a five-year third-party-consent exemption on the PRS Exemptions Register. The strongest schemes for blocks are communal arrays serving landlord-supply areas like lifts and stair lighting.

If you have spent up to the £10,000 cost cap and the property still falls short, or if a genuine barrier exists (the cheapest measure exceeds the cap, an independent surveyor confirms wall insulation would damage the property, or required third-party consent is refused), you can register an exemption on the PRS Exemptions Register. Exemptions must be evidenced and last five years, after which you must try again. They are a backstop for genuinely unimprovable stock, not a planning strategy, for most properties an upgrade is cheaper and lower-risk than repeated exemptions.

Often it is the best landlord solar case of all. In a bills-inclusive HMO the landlord pays the energy bill, so the split incentive disappears and self-consumption returns directly as landlord cash. HMOs also have high shared daytime load, communal kitchen, heating, hot water, broadband and lighting, which solar matches well, and a battery becomes genuinely economic because the landlord keeps the saving. A 4-8 kW array plus insulation also helps clear the EPC C standard and is a strong tenant-acquisition signal in competitive student and professional markets.

On off-gas properties heated by oil or LPG, frequently yes. Those homes have the worst EPCs and the highest tenant bills, so the band uplift is largest, and the Boiler Upgrade Scheme funds the heat pump (£7,500, or £9,000 for off-gas oil/LPG from July 2026) while solar offsets some of the heat pump's electricity demand. From 28 April 2026 BUS no longer requires a qualifying EPC, widening eligibility. Check the property's electrical supply, combining solar, a heat pump and possibly an EV charger can need a DNO supply upgrade on older single-phase connections.

There is good evidence that lower-running-cost, higher-EPC properties let faster, attract better-quality tenants and command stronger rents, because energy bills are now a front-of-mind tenant concern. A solar-equipped, EPC-C property is more marketable and more defensible at rent review than a draughty D or E. It also protects you from the 2030 compliance cliff and supports refinance and resale value, since lenders and buyers increasingly price in EPC risk. These lettability and value effects are the main returns where the tenant pays the energy bill.

Yes. Under the Warm Homes Plan, landlords are expected to spend up to £10,000 per property to reach EPC C, and qualifying energy-efficiency works, including solar PV, insulation and low-carbon heating, count toward that cap. Crucially, improvements made from October 2025 onward already count, so works you do now are not wasted. Sequence the cheapest band-moving measures first and use solar to both lift the rating and generate income within the same envelope.

In most cases, no, rooftop solar on houses is generally Permitted Development, provided panels do not protrude more than 200mm, are not on the principal elevation of a listed building, and the property is not in a conservation area with restrictions. Listed buildings need Listed Building Consent, flats and maisonettes have tighter rules, and leasehold properties need freeholder consent regardless of planning. We confirm planning and consent status as part of the survey before any work begins.

Yes, through tenant-led schemes. Under ECO4 (running to December 2026), a tenant on a qualifying means-tested benefit (or referred via LA Flex) can unlock funded insulation and heating measures, with the landlord's consent and at no cost to the tenant. The Warm Homes: Local Grant (to 31 March 2028) lets a privately renting tenant on a household income of £36,000 or less, in an EPC D-G home, apply via the local authority with the landlord's permission. Landlords cannot claim these directly, but they are a real way to subsidise the route to band C on lower-income tenancies.

A standard rooftop install on a single let is typically one to two days on site once surveyed, with the whole process from survey to commissioning usually two to six weeks. The main variables are scaffolding, any DNO G99 approval needed for larger arrays (allow a few weeks), and obtaining freeholder or leaseholder consent on flats, which can take longer. For a portfolio rollout we run a programmed schedule across units to beat the pre-2030 installer bottleneck and spread your capex.