Hertfordshire

Welwyn Hatfield planning data

857 planning applications from Welwyn Hatfield, available as JSON over REST or through the MCP server. 16 fields are populated on at least 90% of records.

857

Applications

—

Enforcement notices

542

Appeals

2024–2026

Date range

Field coverage

Measured across all 857 records. This is what is actually filled in, not what the council's portal offers — ask get_council_fields for the same numbers from an MCP client.

Reliable — 90% or more of records

Field	Populated	Coverage
`address`	857	100.0%
`application_type`	857	100.0%
`case_officer`	857	100.0%
`description`	857	100.0%
`easting`	857	100.0%
`northing`	857	100.0%
`officer_id`	857	100.0%
`received_date`	857	100.0%
`reference`	857	100.0%
`status`	857	100.0%
`ward`	857	100.0%
`applicant_name`	854	99.6%
`postcode`	849	99.1%
`status_normalized`	844	98.5%
`agent_id`	822	95.9%
`agent_name`	822	95.9%

Partial — use with care

Field	Populated	Coverage
`standard_type`	617	72.0%
`decision_normalized`	501	58.5%

Rarely or never published

Field	Populated	Coverage
`agent_company`	24	2.8%
`agent_email`	17	2.0%
`decision_level`	9	1.1%
`decision`	5	0.6%
`decision_date`	4	0.5%
`agent_phone`	0	0.0%
`alternative_reference`	0	0.0%
`appeal_decision`	0	0.0%
`appeal_decision_normalized`	0	0.0%
`development_type`	0	0.0%
`officer_recommendation`	0	0.0%
`property_id`	0	0.0%

Query it

curl -H "X-Api-Key: $KEY" \
  "https://ukplanningapi.co.uk/v1/applications?council_id=460&limit=5"

Council id for Welwyn Hatfield is 460. Full endpoint reference →

Get a key for Welwyn Hatfield data

500 requests a month, free. No card, no password.