Data source
planning.data.gov.uk: National planning designations and the local planning authority register
Conservation areas, listed buildings, green belt, National Landscapes, national parks, flood zones, Article 4 directions, brownfield land, ancient woodland, tree preservation orders, air quality management areas, scheduled monuments and the boundaries and portals of every local planning authority.
- Licence:
- Open Government Licence v3
- Coverage:
- England
- Tools:
- 4
Role
What planning.data.gov.uk data lets a tool answer
The designations a planner reads first, in one call. They are checked live when a site is appraised, so a page never shows a stale designation, and a failed check is reported as unknown rather than absent.
Terms
Licence, attribution and refresh
- Licence
- Open Government Licence v3.0 for the datasets we read; each dataset page states its own licence.
- Attribution
- Contains public sector information licensed under the Open Government Licence v3.0.
- Refresh
- Live: read from the service at the time of each call.
- Coverage
- England
This page describes how MarketCode uses the data. It is not legal advice on how you may reuse what a tool returns; the tool pages say when a response carries licensed records.
Tools
Tools that read planning.data.gov.uk records
Planning designations at a location
planning_designations()Every planning designation affecting a location, in one call: conservation
Planning authority for a location
planning_applications()The local planning authority for a location and its planning-portal URL.
Search land or units by criteria
sourcing_search()Find land parcels or residential units matching investment criteria — the sourcing tool. Give a `location` (place or area name) or a `bbox`.
Derived
Models and indices built on it
These tools do not return planning.data.gov.uk rows; they return a MarketCode model or index computed from them. The methodology page explains each.
Site appraisal dossier
site_appraisal()Everything known about ONE site, assembled and judged — the site dossier.
Related
Sources it is joined with
- HM Land Registry: Price Paid Data
- HM Land Registry: Commercial and Corporate Ownership (CCOD) and Overseas Companies Ownership (OCOD)
- Ordnance Survey: National Geographic Database (buildings, land and sites)
- Ministry of Housing, Communities and Local Government: Energy Performance Certificates (domestic and non-domestic)
FAQ
Questions about planning.data.gov.uk data
What planning.data.gov.uk data does MarketCode use?
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Conservation areas, listed buildings, green belt, National Landscapes, national parks, flood zones, Article 4 directions, brownfield land, ancient woodland, tree preservation orders, air quality management areas, scheduled monuments and the boundaries and portals of every local planning authority. The designations a planner reads first, in one call. They are checked live when a site is appraised, so a page never shows a stale designation, and a failed check is reported as unknown rather than absent.
Which tools read this dataset?
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4 tools: Planning designations at a location, Planning authority for a location, Site appraisal dossier, Search land or units by criteria. Each is available as an MCP tool and a REST endpoint at the same price.
Under what licence?
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Open Government Licence v3.0 for the datasets we read; each dataset page states its own licence. The attribution we carry: "Contains public sector information licensed under the Open Government Licence v3.0." This page describes how we use the data; it is not legal advice on how you may.
How often is it refreshed, and what does it cover?
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Live: read from the service at the time of each call. Coverage: England.
Is there a planning constraints API?
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Yes, in effect: the MarketCode tools that read planning.data.gov.uk are the planning constraints API most people are looking for, reachable over REST with an API key or over MCP from Claude, ChatGPT, Codex and Cursor with a sign-in.
See planning.data.gov.uk data answer a real address.
Thirty minutes, your property or area, every figure traced to its source.