Where do commercial solar leads actually come from? Not a bought list. The register, ranked.
The weekly-refreshed intelligence layer for commercial solar, every suitable roof in your region scored by opportunity, each with the per-site prize and why the owner should act now, on one interactive satellite map.
Verified company onboarding · annual plans. See the market report.
Why your prospects are ready now
Commercial electricity and grid charges keep climbing, and the biggest bills sit under the biggest roofs. With typical commercial rooftop payback around 4–9 years, owners are moving to capture that value now, exactly the sites Sunseam surfaces first.
The minimum EPC rating to let is Band E today; the government's long-term target is EPC B for large non-domestic buildings (over 1,000 m², most warehouses and sheds), expected around 2031. Solar lifts a building's band, so owners de-risk ahead of it. (The old 2027 'Band C' step was dropped.)
of UK commercial rooftops have solar today, a large, largely untapped market.
of warehouse & large-shed roof across the UK, the biggest bills sit under the biggest roofs.
typical commercial rooftop-solar payback, faster the more electricity a site uses by day.
Sunseam estimates.
Your unfair advantage
Every roof scored and sorted by real solar opportunity, so you start at the top.
See every site on satellite imagery, coloured by opportunity or grid headroom.
Spot the buildings under energy-rating pressure, the owners with the strongest reason to move.
See where one freehold title covers several units, so you know before you call that there is a landlord to talk to, and that the same landlord controls every other unit on that title.
Estimated system size, annual saving, payback and 25-year value for every roof, a ready opener.
Refreshed weekly from the official register as new and changed certificates land, with every ranked roof re-scored monthly, a metered-confidence data layer, never a stale export.
Your subscription covers ranked roof data and research tools. When an owner requests introductions, we may match them with suitable verified installers who work in the region. Introductions are separate from the subscription; any introduction fee is fixed and agreed with you in advance. An owner may authorise up to three installer businesses. Introductions are not guaranteed.
How it works. Pick a region, work the list, win the site.
Pick your region
Apply for the regions you serve; we confirm availability and terms.
See ranked roofs
Every suitable roof scored by Solar-Fit, on a map and a full list.
Approach with confidence
Lead with the prize and a ready business case.
Work the commercial roofs in your plan's regions.
Choose the regions you need once your company is verified. Start every approach with the per-site prize and a ready business case.
FAQ
How do installers find the best commercial roofs for solar?
The fastest way is to start from data, not to drive around. Sunseam ranks every suitable commercial roof in a region by a Solar-Fit score, the building's electricity bill, roof/system size, daytime load, EPC/MEES pressure and local grid headroom, so you work the highest-opportunity sites first, each with the per-site prize and a built-in pipeline to track outreach. Under 5% of UK commercial rooftops have solar today, across roughly 350 million m² of warehouse and large-shed roof, so the opportunity is large and largely untapped.
Is there a tool that ranks commercial roofs by solar potential?
Sunseam ranks suitable commercial roofs in its covered regions by solar opportunity, with a map and pipeline to work them. Access requires a verified installer account and an annual plan, which your company chooses once it is verified.
Where do the best commercial solar leads come from?
The best commercial solar leads aren't a bought list. They're the ranked roofs in your own region. Sunseam scores every suitable commercial roof by solar opportunity (electricity bill, roof size, daytime load, energy-rating/MEES pressure and grid headroom), so you start at the top of the list instead of cold-canvassing. When an owner requests introductions, suitable installers may also be matched under their agreed introduction terms. Typical commercial rooftop-solar payback is about 4–9 years.
How do installers get access?
Apply for an installer account. Once your company is verified, you choose an annual plan and review its price and terms before anything is charged. Applying does not start a subscription. The building-owner calculator remains free.
Are introductions to building owners charged?
Your annual regional seat covers agreed access to building data and research tools, and makes you eligible to receive suitable introductions. Where your agreement includes introduction fees, qualified introductions are charged separately at the agreed fixed fee. Unless you have agreed automatic acceptance, you see a summary without the owner's details before deciding; declining or letting an offer expire costs nothing. Automatic acceptance follows your agreed criteria and monthly spending limit. A qualified introduction is an owner who asked for quotes, permitted introductions and gave usable contact details for an identified site. We do not guarantee how many introductions you receive, and an owner can authorise up to three installer businesses, so an introduction is never exclusive.
Can installers work across several regions?
Tell us which regions your company serves during onboarding, then choose a plan covering one, several or all of them.
Why don't I see every commercial building in my area?
By design: Sunseam lists the roofs worth your time, not every building. We include non-domestic buildings from the official Energy Performance of Buildings register (England & Wales) with a usable roof of about 1,000 m² or more, roughly a 90 kWp-plus system, the commercial-solar-viable range, refreshed weekly. We deliberately leave out what isn't a real opportunity: sites below that size floor (you can widen it any time with the system-size filter), roofs already fully covered by solar, and residential/domestic properties. So if a site you know isn't listed. It's almost always one of those, or it has no current EPC lodged on the register yet.
How is the Solar-Fit score worked out?
Every roof is scored 0–100 on how attractive it is for commercial rooftop solar. The score blends the building's electricity bill (the prize, and the biggest driver), roof and system size (kWp), likely daytime electricity use (which drives the self-consumption economics), EPC/MEES regulatory pressure (the 'why now'), and local grid headroom (an indicative area signal, not a connection offer). Every figure comes from official EPC data and is labelled metered (from the building's measured electricity) or typical (estimated for its type and size). You can re-sort and filter on any of them, size, deal value, payback, grid headroom, energy rating, so the ranked list matches how you actually qualify sites.