API & data access
Everything here comes from a single lookup table: 1,492,853 England postcodes, each with modelled road and rail noise levels (day and night, dB values and bands) from DEFRA Strategic Noise Mapping Round 4 (2022), plus the town or city each postcode belongs to. Useful for property portals, environmental reports, conveyancing products and research.
Indicative pricing
| Tier | What you get | Indicative price |
|---|---|---|
| One-off export | Full postcode dataset, CSV, single delivery | from £250 |
| API | Postcode lookup endpoint, up to 100k calls/month | from £50/month |
| Research / press | Aggregates and custom cuts, with attribution | often free — ask |
The underlying DEFRA and OS data is open data; what you're paying for is the cleaned, joined, postcode-level product and its upkeep.