Data source
Ordnance Survey: AddressBase
The national address register: every addressable location in Great Britain with its Unique Property Reference Number (UPRN), postcode, coordinates and classification.
- Licence:
- Used under licence from Ordnance Survey
- Coverage:
- Great Britain
- Tools:
- 6
Role
What Ordnance Survey data lets a tool answer
The spine of the platform. Every per-property tool keys on the UPRN, which lets a sale, an EPC, a council tax band and a listing be joined to the same front door. Resolving an address to its UPRN is the call almost every workflow starts with.
Terms
Licence, attribution and refresh
- Licence
- Used under licence from Ordnance Survey. Responses that carry AddressBase records are priced as licensed data.
- Refresh
- Reloaded on each AddressBase release we take, roughly every six weeks.
- Coverage
- Great Britain
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 Ordnance Survey records
Autocomplete a UK address
address_autocomplete()Free address autocomplete. Returns ranked candidates for a partial address
Resolve an address to a UPRN
address_resolve()Resolve free-text address to canonical record (UPRN for UK).
Look up an address by UPRN
address_by_uprn()Look up an address by UPRN (UK only).
List the addresses at a postcode
address_by_postcode()Return all addresses at a UK postcode.
Property summary
property_summary()One-call summary of a property: what it is, what building it belongs to,
Full property record
property_lookup()Full property record for a UPRN, grouped into tiers: identity, property,
Related
Sources it is joined with
- HM Land Registry: Commercial and Corporate Ownership (CCOD) and Overseas Companies Ownership (OCOD)
- Ordnance Survey: National Geographic Database (buildings, land and sites)
- Valuation Office Agency: Council tax valuation list
- Ministry of Housing, Communities and Local Government: Energy Performance Certificates (domestic and non-domestic)
FAQ
Questions about Ordnance Survey data
What Ordnance Survey data does MarketCode use?
+
The national address register: every addressable location in Great Britain with its Unique Property Reference Number (UPRN), postcode, coordinates and classification. The spine of the platform. Every per-property tool keys on the UPRN, which lets a sale, an EPC, a council tax band and a listing be joined to the same front door. Resolving an address to its UPRN is the call almost every workflow starts with.
Which tools read AddressBase?
+
6 tools: Autocomplete a UK address, Resolve an address to a UPRN, Look up an address by UPRN, List the addresses at a postcode, Property summary, Full property record. Each is available as an MCP tool and a REST endpoint at the same price.
Under what licence?
+
Used under licence from Ordnance Survey. Responses that carry AddressBase records are priced as licensed data. 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?
+
Reloaded on each AddressBase release we take, roughly every six weeks. Coverage: Great Britain.
Is there a UPRN lookup API?
+
Yes, in effect: the MarketCode tools that read Ordnance Survey are the UPRN lookup 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 Ordnance Survey data answer a real address.
Thirty minutes, your property or area, every figure traced to its source.