The £10,000 MEES Cap: Does Solar Count, and How Do You Evidence an Exemption?

Every landlord I meet has read the headline. “£10,000 cap coming for rented homes.” Then come the two questions I actually get paid to answer: does putting solar on the roof count towards that money, and if the property still won’t reach the standard, what on earth do I lodge as evidence?

Both have proper answers. Neither is the answer the headline implies. So let’s do what I do with landlords in my office: separate what’s law today from what’s now confirmed government policy for 2030, then work the mechanics — because the mechanics are identical whichever number ends up governing your property.

Status checkThe £10,000 cap is confirmed policy — but not law yet

Start here, because this is where most coverage online is already out of date. The Minimum Energy Efficiency Standards — MEES — have required most privately rented homes in England and Wales to hold an EPC rating of E or above since the rules bit fully in 2020. Alongside that sits a cost cap: a landlord must install “relevant improvements” up to a spend of £3,500 per property, VAT included. That is the law as it stands today, and nothing below changes it.

What has changed is the status of the £10,000 figure. On 21 January 2026, alongside the government’s Warm Homes Plan, the Department for Energy Security and Net Zero published its formal response to the 2025 consultation on private rented sector MEES. It confirmed the direction of travel: privately rented homes in England and Wales will need to reach EPC Band C, assessed against two new metrics, by 1 October 2030 — and it set the cost cap for getting there at £10,000 per property, down from the £15,000 the consultation itself had floated. That’s a firmer status than “proposed”: it’s the government’s settled policy position, backed by a published response document, not just a discussion paper. What it isn’t, yet, is enacted law — Parliament still needs to pass a statutory instrument amending the 2015 Regulations before the new standard actually bites.

There’s a second wrinkle worth knowing before you plan around 2030. The EPC C figure assumes a brand-new assessment methodology — the Home Energy Model, or HEM — replacing the SAP calculation every EPC has used since 1995. On 9 March 2026 the government confirmed that HEM-based EPCs, originally pencilled in for late 2026, are delayed to the second half of 2027. Until HEM EPCs exist, MEES compliance is still measured on today’s EPC, under today’s E-band, £3,500-cap rules. Check the current position on the gov.uk domestic MEES guidance before you spend or lodge anything — 1 October 2030 is the government’s stated target, not a guarantee against further slippage.

Here’s the useful part, though: nothing about the machinery changes between the two regimes. What counts as a relevant improvement, how spend is tallied, how exemptions are registered and evidenced — all of it is the same engine with a different dial. So this guide works for both worlds, and I’ll flag exactly where the number — and the metric — flips your strategy.

MechanicsHow the cap actually works

MEES is outcome-based. The law polices your EPC rating, not your wallet. The cap exists to limit what you can be compelled to spend chasing that rating — it is a shield, not a target. Nobody gets fined for spending less than £3,500, or £10,000, or a penny.

The spend test runs like this. Take a valid EPC and its recommendations report. The measures listed there — insulation, heating controls, low and zero carbon systems and the rest — are your pool of “relevant improvements”. You price them, VAT included, and install the package that fits inside the cap. If a package gets you to the minimum band, you install it and re-assess. If nothing fits inside the cap, or everything that fits still leaves you short, the cap has done its job and an exemption opens up.

Three details trip people up. One: the cap is per property, not per portfolio. Two: it’s inclusive of VAT, which matters more than it sounds — more on that shortly. Three: it’s a package test, not a menu. You don’t get to pick the measure you fancy and ignore the cheap loft insulation the report also lists; the cheap stuff goes in first, because it fits under the cap and moves the rating.

The big questionDoes solar count? Yes, with one condition

Two separate questions hide inside “does solar count”, and they have different answers.

Does solar count towards the rating?

Unequivocally yes. Solar PV is a recognised EPC improvement. It generates on-site zero-carbon electricity, the assessment methodology credits it, and the rating lifts. On a typical rented house the lift is modest but real — a handful of points, sometimes enough to carry a borderline property up a band, rarely enough alone to drag an E to a C. It plays best as part of a package with insulation, which is exactly how the recommendations report will present it.

Does solar spend count towards the cap?

Yes — when solar PV appears as a recommended measure in that property’s valid recommendations report. Then the quoted cost, VAT included, is legitimate cap spend, and if the whole package overshoots the cap, your solar quotes are part of the evidence that it overshoots. If solar is not in the report — wrong roof, wrong report vintage, assessor judgement — money spent on it doesn’t count towards the cap test. The rating benefit still lands at your next assessment, but the cap maths ignores it.

Will solar still count under the future EPC?

Under the proposed Home Energy Model, your EPC will carry four separate metrics — fabric performance, heating system, smart readiness and energy cost — and MEES compliance from 2030 will be judged against fabric performance plus one of either heating system or smart readiness, whichever route the landlord opts into. Solar PV’s natural home in that structure is the smart readiness metric, alongside things like battery storage and smart controls, rather than fabric performance, which is about insulation and heat retention and won’t move because you’ve fitted panels. Practically, that means a landlord planning to lean on the heating-system route instead — say, because they’re already fitting a heat pump — shouldn’t assume solar automatically clears the future bar for them, even though it will still appear on the certificate and still cut the bill. This detail comes from the January 2026 consultation on HEM-based EPCs rather than finalised legislation, so treat it as the direction of travel rather than a locked-in rule.

Two riders worth knowing. A battery on its own is generally not a recommendations-report measure, so battery spend usually sits outside the cap test entirely — see my solar battery storage guide for what batteries do and don’t do for a rental. And grant-funded solar counts towards the rating but not towards your spend, because it isn’t your money. That’s fine. The rating is the prize; the cap only matters when you’re failing to reach it.

When you do quote, quote properly. Dated, itemised, from credible firms. If a compliance officer ever reads your file, an MCS-certified paper trail is the difference between evidence and anecdote — my piece on what MCS certification actually means explains why the badge carries that weight.

StrategyThe cap maths flips at £10,000

This is the part most coverage misses, and it’s the reason the cap number matters even before it’s law. The level of the cap doesn’t just change how much you might spend. It changes what solar is in your compliance plan.

At £3,500, a decent domestic solar quote walks past the cap on its own. A typical 4kWp install sits in the mid-four-figures to low-five-figures once hardware, mounting and labour are totalled — my solar panel costs for 2026 rundown has the current bands. So under today’s cap, solar usually lives in exemption territory: it’s the measure that demonstrates the cap can’t deliver the rating, rather than the measure you’re forced to fit.

At £10,000, the same quote sits comfortably inside a mandatory package — solar plus loft insulation plus heating controls, all of it compellable. Solar stops being a green extra and becomes compliance spend you were always going to incur. Landlords who understand that early get a roof that pays them back through saved imports and export income; landlords who don’t will fit the package anyway ahead of 2030 and wonder why nobody mentioned the payback maths first.

That’s the strategic logic regardless of exactly when it bites. With HEM-based EPCs delayed to late 2027 and full compliance due by 1 October 2030, landlords realistically have a shorter runway than the original phased proposal suggested — the government dropped the earlier idea of 2028 for new tenancies and 2030 for everyone else, in favour of one hard date for every tenancy.

Notice the consequence for exemptions, because it’s the mirror image of what landlords assume. Under the low cap, cost-cap exemptions are common and solar quotes help prove them. Under the confirmed £10,000 cap, the exemption narrows dramatically: with that much available, most properties have a compliant package inside it, so “we couldn’t afford to comply” stops washing. The landlords who will still need exemptions once the £10,000 cap is law are the ones with consent walls, listed-building constraints or genuinely hopeless roofs — which is where the rest of this guide earns its keep.

MoneyVAT, grants and the tricks that stretch a cap

Because the cap is VAT-inclusive, tax treatment is compliance strategy. Installation of energy-saving materials, solar PV included, carries 0% VAT in Great Britain until 31 March 2027. Every pound of cap therefore buys a pound of hardware right now, rather than 83 pence of hardware and 17 pence of tax. If your works land after the relief lapses, the same nominal cap buys roughly a sixth less work. Timing your package inside the relief window is one of the cheapest moves available to you, and my grants and 0% VAT rundown keeps the dates straight.

One more date worth diarising: the government’s January 2026 response confirms that qualifying spend from 1 October 2025 onwards will count towards the future £10,000 cap, even though the new standard itself won’t bite until 2030. If you fit solar now, keep every invoice — that spend isn’t wasted admin, it’s already banking itself against a cap you’ll likely need to clear later anyway.

Grants are the second lever, with a caveat. Schemes aimed at private rented stock are thin — ECO4 eligibility mostly runs through occupier and local authority routes rather than landlord portfolios — but where third-party money funds a measure, two things follow. The rating benefit is yours regardless of who paid. And the spend is not yours, so it neither counts towards the cap nor helps prove a cost-cap exemption. Funded measures improve your EPC; unfunded quotes improve your evidence file. Know which job each document is doing.

One myth to kill now: export income doesn’t enter the cap test at all. The domestic cap is a pure cost test, not a payback test. What you might earn under the Smart Export Guarantee is irrelevant to whether you comply — and highly relevant to whether complying stings. If you’re fitting solar anyway, choosing the right export tariff is the difference between pocket money and a proper return; compare them in my SEG rates comparison.

ExemptionsThe five exemptions, and the file behind each

Exemptions are registered free on the private rented sector exemptions register, which is public — tenants, agents and councils can look you up. An entry lasts five years, and it belongs to you, not the property: sell the house and the buyer’s exemption clock starts at zero. Each exemption type demands its own paper trail, and the register entry is only as strong as the folder behind it.

That’s the position under today’s £3,500 cap. The government’s January 2026 response confirms the future £10,000 cap runs on a 10-year cycle rather than as a one-off spend, and consultation documents have floated a longer cost-cap exemption term to match — but this hasn’t been confirmed in the final response. Treat the five-year figure below as today’s rule, not a permanent one, and check gov.uk closer to 2030 for how the cost-cap exemption itself will run under the new regime.

PaperworkBuild the evidence file before you need it

Exemptions don’t fail at registration. They fail eighteen months later, when a compliance notice arrives and the folder contains a screenshot of a quote from a firm that no longer answers its phone. Build the file on the day you make the decision, not the day you lodge the entry.

Why three quotes? Because a cost-cap claim asserts that no compliant package fits the money. One quote proves what one firm charged. Three prove a market. And why MCS firms specifically? Because the quotes may later be read by someone who knows what proper ones look like — see how to choose a solar installer if you need a filter before you start collecting paper.

Watch outPitfalls I keep seeing

Beyond that, the recurring mistakes, in no particular order:

Buying a property with the seller’s exemption attached. It isn’t attached. Exemptions die with the landlord; you get six months as a new landlord to sort yourself out, then you comply or register your own.

Letting an exemption lapse mid-tenancy. The prohibition covers continuing lets, not just new ones. Diary the expiry the day you register.

Assuming listed means exempt. It doesn’t, automatically. The interaction between listed status, EPC requirements and MEES is genuinely fiddly — my listed buildings and solar guide goes into it, and consent refusals are usually your cleaner route anyway.

Treating verbal lender or freeholder reluctance as a consent refusal. Ask in writing, twice, and keep both. A consent exemption built on a phone call is not a consent exemption.

Planning for the wrong number. Assuming £10,000 is already law and over-committing early burns cash on a rule that could still shift before the statutory instrument is laid. Assuming it’s just talk and doing nothing leaves you scrambling as 2030 approaches, especially with the HEM delay already eating into the runway. The middle path costs nothing: price the package now, keep the quotes dated-fresh, and watch for the legislation.

On that last point, my piece on whether landlords will be forced to fit solar under EPC reforms tracks the policy trajectory in one place, so you’re not refreshing legislation pages at midnight.

VerdictSo, should a landlord fit solar now?

Here’s how I’d call it across a portfolio. If a property sits at E with cheap recommendations-report measures still available, do those first — they’re compellable, cheap and they move the rating most per pound. Solar joins later as the finishing layer, or as the quote that proves the cap can’t stretch.

If a property sits at D or borderline C with a decent roof, solar changes character entirely once the confirmed 2030 standard lands: it likely becomes part of the package you’ll be required to install anyway, on either the heating-system or smart-readiness route. Fitting it early — inside the 0% VAT window, with spend from 1 October 2025 already counting toward the future cap, and export income running from day one — means the compliance spend arrives as an asset rather than a fine. My solar for landlords guide works through the tenant, metering and consent practicalities that this article hasn’t room for.

And if the roof is hopeless — north shade, listed constraints, a freeholder who answers nothing — stop trying to make solar carry the file. Build the consent or devaluation exemption properly, and spend your attention on the properties where the maths behaves.

FAQsThe questions landlords actually ask

That’s the whole picture, stripped of headlines. The cap number is confirmed at £10,000; the legislation and the new EPC metrics that make it bite are still catching up, with 1 October 2030 the date to plan around. Solar counts when the report — or, later, the smart readiness metric — says it counts. Exemptions are won and lost in a folder, not on a form. Get those things right and whichever version of MEES you meet, you’ll meet it with quotes dated, evidence filed and the roof already earning its keep.