Public records, cleaned and scored.

From the MHCLG Energy Performance of Buildings Register, the official UK government source for domestic EPC certificates in England and Wales. The register currently holds around 24 million EPC certificates; we index them and deduplicate by UPRN into 17.78 million unique properties. The data is published under the Open Government Licence v3.0, free to query, and the same source that fed the now-retiring epc.opendatacommunities.org endpoint. We sync within 14 days of each new certificate being issued, so a property that gets a fresh EPC in early May is searchable on Retrofit Radar by mid-May. Scotland publishes through a separate Scottish EPC register; we do not index Scotland today.

We refresh the full EPC index every 14 days. New certificates issued by domestic energy assessors land on the MHCLG register typically within 24–72 hours of the assessment; we ingest from the register on a fortnightly schedule. Each property in our index carries a last-refresh timestamp so you can see exactly when its EPC data was last verified. Lead-freshness guarantee on every plan: any lead in your export older than 90 days is replaceable on request. The fortnightly cadence is a deliberate trade-off between freshness and the rate-limiting on the source endpoint — a daily refresh is technically possible but expensive enough that we would have to charge for it.

Partially. Companies House data covers limited-company landlords and is free — around 5 to 10% of UK rental titles are owned by registered companies, which we surface at no cost. The remaining 90 to 95% are individual landlords, whose registered proprietor is held only at HM Land Registry. HMLR title queries are licensed by the Crown and cost £7 per query (raised on 9 December 2024 from the previous £3.00 fee that had stood for a decade). We pass that fee through at cost — £7 PAYG on Solo, 10 free unlocks per month on Pro and £7 each thereafter, no markup either way. We are not allowed to bulk-cache HMLR data; each unlock is a fresh, licensed query attributable to your account.

A postcode covers between 10 and 100 properties; a UPRN identifies one. The Unique Property Reference Number is a 12-digit code assigned to every addressable location in Great Britain by Ordnance Survey, published as part of OS Open UPRN under the Open Government Licence. We use UPRN as the primary key for our 17.78 million-property index — it is what lets us deduplicate two EPC certificates issued for the same flat at different times into one property record. Postcode is the search interface; UPRN is the data spine. When you export a CSV, the UPRN column is what you join on if you bring in third-party data later.

Around 5 to 10% of UK rental titles are held by limited companies — typically buy-to-let SPVs, family property holding companies, and small portfolio landlords who incorporated for tax efficiency. Companies House publishes director names, registered office addresses and filing statuses for free. For corporate-landlord properties, we surface the company name, the active directors and the registered office without you needing to spend £7 on an HMLR unlock. That makes corporate landlords the cheapest segment to prospect: free data, often a single decision-maker, and frequently a portfolio of similar properties to upsell once you have built rapport on the first job.

Yes, in almost every case, on a B2B legitimate-interest basis. Property data on Retrofit Radar comes from public UK government registries — EPC, Companies House, HM Land Registry. When you contact a landlord about retrofit work that helps them comply with MEES 2030, UK GDPR Article 6(1)(f) (legitimate interests) and the soft opt-in for B2B marketing under PECR (Privacy and Electronic Communications Regulations) typically apply. When you export leads, you become the controller for that downstream marketing — you must give a clear opt-out, identify yourself, and respect any opt-out the landlord has registered with the TPS or CTPS. We surface the lawful basis on every lead row and link to the ICO direct-marketing guidance from /privacy.

MHCLG retires the legacy epc.opendatacommunities.org endpoint on 30 May 2026 and consolidates onto the new Find an Energy Certificate service. Our ingestion adapters cover both the legacy and replacement endpoints, so the refresh cadence on Retrofit Radar is unaffected through the cutover. The data-sources page banner will update once the new endpoint is the only one in use.