Retrofitting a rental property or a commercial unit with solar panels, a heat pump or an EV chargepoint is increasingly a compliance decision as much as a green one — but the tax treatment of that spend is not the same for a residential landlord as it is for a developer working on commercial stock, and getting the two confused is how relief goes unclaimed on one side and gets wrongly claimed on the other.
The VAT relief: zero-rating for energy-saving materials
The installation of qualifying energy-saving materials in residential accommodation is zero-rated for VAT in Great Britain. The relief covers the installer's supply of both materials and labour where they install the equipment — it does not extend to buying the equipment on its own with no installation. Qualifying items include solar panels (photovoltaic and solar thermal), air and ground source heat pumps, insulation, draught stripping, wind and water turbines, and battery storage installed as part of a qualifying installation. The relief also extends to buildings used solely for a relevant charitable purpose. This is a meaningful saving on a genuinely large spend — a residential solar and battery installation can easily run to several thousand pounds, and the VAT that would otherwise sit on top of it is removed entirely rather than merely reduced.
The relief applies UK-wide but at different rates: Great Britain benefits from the full zero rate, while Northern Ireland's position is set separately under the terms agreed for VAT on property in NI, so the rate there needs checking against current guidance rather than assumed to match. Where a scheme mixes qualifying residential units with commercial floor space — a mixed-use conversion, for example — only the residential element gets the zero rate, and the apportionment needs the same care as any other mixed-use VAT calculation.
Why the same equipment behaves differently on commercial buildings
Once you move from a let dwelling to a commercial building, the VAT zero-rating for energy-saving materials no longer applies — standard VAT rules apply to the installation, recoverable in the normal way if the building is opted to tax and let to a VAT-registered tenant, or restricted if the letting is exempt. But commercial property gains something residential property mostly can't reach: capital allowances.
Solar panels, heat pumps, battery storage and similar plant installed in or on a commercial building generally qualify as integral features, sitting in the special rate capital allowances pool alongside electrical, heating and water systems, written down at 6% a year on a reducing-balance basis. In practice, most of that spend is relieved far faster than the 6% rate suggests, because it also qualifies for the Annual Investment Allowance — 100% relief in the year of expenditure, up to the £1 million annual cap, available to businesses of any structure. For companies specifically, full expensing adds a 50% first-year allowance on qualifying special rate plant that falls outside the AIA cap, on top of the separate 100% first-year relief available for main-rate assets.
The EV chargepoint allowance
Electric vehicle chargepoints sit outside the ordinary pools altogether. The Capital Allowances Act 2001 gives a dedicated 100% first-year allowance for expenditure on chargepoint equipment, which has been extended more than once by successive Budgets since it was introduced. Because the relief is time-limited by design rather than permanent, the current expiry date needs checking before a scheme is costed — but where it applies, it puts chargepoint installation cost on the same immediate-relief footing as fully expensed main-rate plant, which matters increasingly for developments and commercial units expected to offer EV charging as standard.
Why the dwelling-house rule blocks landlords from allowances
This is the trap that catches most individual landlords: plant and machinery capital allowances are specifically blocked for expenditure on plant within a dwelling-house under the property income rules. A solar array, a heat pump, or battery storage fitted to a single let house or flat generally gets no capital allowances at all for an individual or partnership landlord, whatever pool it would otherwise sit in on a commercial building. The VAT zero-rating on installation is real and worth having, but it is often the only relief available at the point of spend — the rest of the cost simply adds to the property's base cost, reducing the eventual Capital Gains Tax bill on sale rather than saving tax now. Furnished holiday lets used to sidestep this through their access to capital allowances, but that route closed when the FHL regime was abolished from April 2025, and residential landlords holding property through a company rather than personally do not get around the dwelling-house restriction either — the block applies by reference to the asset, not the owner.
Where retrofit spend genuinely replaces a failing system on a like-for-like basis — a new heat pump replacing a broken boiler in materially the same role — there is also a revenue repairs argument worth exploring rather than defaulting to treating it as capital improvement, in the same way that modern equivalent replacements are usually still repairs elsewhere in a rental property. Where the retrofit adds capability that wasn't there before — installing solar where there was none — that argument is much harder to sustain, and the spend is capital.
The EPC direction of travel
None of this sits in a vacuum. Minimum Energy Efficiency Standards already require most privately rented residential property to meet at least an EPC E rating before it can lawfully be let, and government policy has been moving toward raising that minimum toward EPC C over the remainder of this decade. Whatever the final implementation timeline turns out to be, the direction is unmistakable, and portfolio landlords who leave retrofit decisions until a deadline is imminent lose the ability to plan the VAT and capital allowances position around it. Timing a retrofit programme around the zero-rated VAT window, and around whichever properties sit in a company or commercial structure where allowances are actually available, is a materially different exercise from reacting to a compliance deadline at the last minute.
What this means in practice
For a residential landlord: expect the VAT zero-rating on installation, but not capital allowances, on a solar or heat pump retrofit to a let dwelling — and keep the spend on record to enhance base cost for CGT. For a developer or investor working through a commercial structure: the same equipment usually lands in the special rate pool, most of it covered by the Annual Investment Allowance, with EV chargepoints potentially qualifying for their own 100% first-year relief on top. Getting the structure right before the works start, not after the invoice lands, is what determines which of those two positions actually applies.
Common questions
Is VAT charged on solar panels and heat pumps installed in rental property?
Installation of qualifying energy-saving materials, including solar panels, heat pumps, insulation and (subject to conditions) battery storage, in residential accommodation is zero-rated for VAT, meaning the installer charges no VAT on the labour and materials supplied as part of that installation.
Can a landlord claim capital allowances on solar panels fitted to a let dwelling?
Generally no. Plant and machinery allowances are blocked on assets fitted within a dwelling-house under the property income rules, so an individual landlord usually gets no income tax relief for solar panels on a let house or flat beyond the VAT saving, though the cost still enhances the base cost for Capital Gains Tax on eventual sale.
How are solar panels and heat pumps treated for tax on commercial property?
On commercial buildings, solar panels, heat pumps and similar plant typically qualify as integral features in the special rate capital allowances pool, written down at 6% a year on a reducing-balance basis, but usually benefit from the Annual Investment Allowance for full first-year relief up to the £1 million annual cap.
Do EV chargepoints qualify for a special capital allowance?
Electric vehicle chargepoints have their own dedicated 100% first-year allowance under the Capital Allowances Act 2001, separate from the general plant and machinery pools, though the relief has historically been time-limited and extended by successive Budgets, so the current expiry date should always be checked before relying on it.
Kieran Holsgrove is a Director and Co-Founder of Grafene Accounting, the property tax specialist firm based in Liverpool. He advises property developers, investors and landlords across Merseyside, Greater Manchester, Lancashire and Cheshire on tax structuring, developer VAT, SDLT and the long-view decisions that compound over the life of a portfolio.
This article is general information, not personal tax advice, and tax rules change. Your own position depends on facts we cannot see from here — please take advice before acting on anything above.