Each dataset below is published under the Open Government Licence v3.0 and carries a required acknowledgement. If you reuse any of this data, reproduce the statement for whichever source it came from.
/v1/outcodes/Derived from the National Statistics Postcode Lookup (May 2026), Office for National Statistics.
Contains OS data © Crown copyright and database right 2026 Contains Royal Mail data © Royal Mail copyright and database right 2026 Source: Office for National Statistics licensed under the Open Government Licence v.3.0
All three lines are required — Ordnance Survey and Royal Mail both hold rights in the underlying data, not only ONS.
Source: https://geoportal.statistics.gov.uk/
What was changed: terminated postcodes removed; only the postcode, local authority code, police force code and coordinates retained; coordinates rounded to four decimal places; split into one file per outcode.
/v1/rents/Derived from the Price Index of Private Rents, Office for National Statistics.
Source: Office for National Statistics licensed under the Open Government Licence v.3.0
Source: https://www.ons.gov.uk/economy/inflationandpriceindices/bulletins/privaterentandhousepricesuk/latest
What was changed: the average rent series extracted from the published spreadsheet for each local authority and split into one file per area. Index values, monthly change and annual change columns were not carried over; only the rental price figures, overall and by bedroom count.
/v1/lha-rates.jsonLocal Housing Allowance rates, Department for Work and Pensions.
Source: Department for Work and Pensions licensed under the Open Government Licence v3.0
Source: https://www.gov.uk/government/publications/understanding-local-housing-allowance-rates
What was changed: the annual rate tables for England, Scotland and Wales combined into one file keyed by Broad Rental Market Area. Area names were normalised where the published spelling varied between years (for example “Crawley & Reigate” and “Crawley and Reigate”, “Weston-S-Mare” and “Weston-Super-Mare”, “Flint” and “Flintshire”). The published spelling for the most recent year is kept as the display name.
v1/brma/)Built by Savvy Renter by placing each postcode in this repo (v1/outcodes/, from the ONS
National Statistics Postcode Lookup) inside the official Broad Rental Market Area boundaries:
All under the Open Government Licence v3.0. The method follows Bailey, N. (2025) Postcode to Broad Rental Market Areas (BRMAs) Lookup v2.2, Urban Big Data Centre, University of Glasgow (doi:10.20394/mu6lw0x9; method at https://github.com/nick-bailey/Postcode-to-BRMA-lookup). Their lookup file itself is not used.
Postcodes that fall just outside every drawn boundary (on the coast, at the edge of an estuary) are given the nearest area.
/v1/councils.jsonBand D charges compiled by PlainCouncilTax (https://plaincounciltax.co.uk/) from figures published by the Ministry of Housing, Communities and Local Government, the Scottish Government, StatsWales and the Valuation Office Agency.
Council tax data: PlainCouncilTax (plaincounciltax.co.uk), licensed under CC BY 4.0. Contains public sector information licensed under the Open Government Licence v3.0.
The compilation is under Creative Commons Attribution 4.0 (https://creativecommons.org/licenses/by/4.0/); the underlying figures are OGL.
What was changed: the Band D charge for each council kept for the two most recent years, keyed by local authority code, with the statutory band ratios for England, Wales and Scotland and the main discounts added. Parish and town council precepts are not included.
Open Government Licence v3.0, except /v1/councils.json (CC BY 4.0, see above) —
https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/