Transparency · How it works
Data sources and methodology
Every lender-ready evidence pack is built from structured, citable data. This page documents exactly what we use, where it comes from, and how current it is — our planning data sources UK lenders and developers can verify.
PlanSureAI does not scrape opaque third-party portals or rely on unaudited broker spreadsheets. Each annex in a lender-ready evidence pack traces back to a named dataset below. Coverage varies by region — strongest across South West England, expanding nationally.
Planning appeals (PINS)
| Records | 188,933 appeal decisions (2015–2025) |
|---|---|
| Source | MHCLG PINS dataset |
| Last updated | April 2026 |
| Coverage | England |
Land Registry transactions
| Records | 1.67M residential Price Paid Data transactions |
|---|---|
| Source | HM Land Registry Price Paid Data |
| Last updated | Monthly |
| Coverage | England and Wales |
CIL charging schedules
| Records | 30+ local planning authority schedules |
|---|---|
| Source | Individual LPA published charging schedules |
| Last updated | As published by each LPA |
| Coverage | South West England (strongest); England (partial) |
Planning applications
| Records | Live and historical application metadata |
|---|---|
| Source | planning.data.gov.uk |
| Last updated | As ingested from source feed |
| Coverage | Cornwall Council and selected LPAs |
EPC certificates
| Records | Domestic energy performance certificate data |
|---|---|
| Source | api.get-energy-performance-data.communities.gov.uk |
| Last updated | As published by the register |
| Coverage | England and Wales |
Viability benchmarks
| Records | Regional build cost benchmarks (e.g. Cornwall: £2,090/sqm) |
|---|---|
| Source | BCIS / Costmodelling |
| Last updated | April 2026 |
| Coverage | England (regional benchmarks; strongest in South West) |
How packs are assembled
Postcode and planning status are the inputs. PlanSureAI pulls the datasets above, structures them into five annexes (permission, constraints, S106, costs, viability), runs a readiness check, and stamps a SHA-256 snapshot on export. Every figure in the pack is citable to a source named on this page.
PlanSureAI is an observational research tool. Data is used to structure evidence — not to give planning, legal, or financial advice.
See also Disclaimer and Privacy.