Hertfordshire

Welwyn Hatfield planning data

1,163 planning applications from Welwyn Hatfield. Ask questions about them in plain English from ChatGPT or Claude — no coding, about two minutes to set up — or pull them straight into your own software. 15 pieces of information are filled in on at least 90% of records.

1,163

Applications

—

Enforcement notices

542

Appeals

1980–2026

Date range

What Welwyn Hatfield decides

Welwyn Hatfield has approved 89.07% of the 741 applications it has decided since January 2023. Across the 225 councils with a comparable caseload the range is 71.37% to 99.14%, so this is below the middle of the pack (89.18%).

89.07%

Approved, of 741 decided

Median days to a decision

63.2

Average days

What it mostly decides

The mix of application types Welwyn Hatfield handles — useful for telling whether your kind of application is routine here or unusual.

Application type	Applications	Share
Tree	298	25.6%
Other	255	21.9%
Householder	247	21.2%
Conditions	128	11.0%
Full	124	10.7%

How approval rates and decision times vary across the country →

What Welwyn Hatfield actually fills in

A "field" is one piece of information on an application — the decision date, the applicant's name, the address. Councils fill these in inconsistently, so this table measures how often Welwyn Hatfield actually provides each one, across all 1,163 records. Anything listed as reliable you can count on; anything lower, check the council's own record before relying on it.

Once this data is connected to ChatGPT or Claude you can just ask "what information does Welwyn Hatfield actually fill in?" and get these same numbers back. How to connect →

Reliable — 90% or more of records

Information	Records with it	Coverage
Address `address`	1,163	100.0%
Application type `application_type`	1,163	100.0%
Case officer `case_officer`	1,163	100.0%
Description of the works `description`	1,163	100.0%
Date received `received_date`	1,163	100.0%
Council reference `reference`	1,163	100.0%
Status `status`	1,163	100.0%
Ward `ward`	1,161	99.8%
Applicant's name `applicant_name`	1,159	99.7%
Map coordinates (easting) `easting`	1,159	99.7%
Map coordinates (northing) `northing`	1,159	99.7%
Postcode `postcode`	1,147	98.6%
Status (standardised wording) `status_normalized`	1,142	98.2%
Who decided it (officer or committee) `decision_level`	1,125	96.7%
Agent's name `agent_name`	1,122	96.5%

Partial — use with care

Information	Records with it	Coverage
Decision (standardised wording) `decision_normalized`	881	75.8%
Decision `decision`	848	72.9%
Decision date `decision_date`	848	72.9%
Standardised type `standard_type`	617	53.1%

Rarely or never published

Information	Records with it	Coverage
Agent's company `agent_company`	24	2.1%
Agent's email `agent_email`	17	1.5%
Appeal decision `appeal_decision`	0	0.0%
Appeal decision (standardised wording) `appeal_decision_normalized`	0	0.0%

Not published by this council

Welwyn Hatfield's portal has been verified not to publish these fields at all — different from a field that exists but is rarely filled in.

Agent's phone Alternative reference Type of development Officer's recommendation

Get this data

Ask it in ChatGPT or Claude

Connect it once with your email address, then ask questions like "which extensions were refused in Welwyn Hatfield last year?" or "what's the planning history of this address?" — no coding, about two minutes to set up. Setup guide →

Or call it from your own code

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

Council id for Welwyn Hatfield is 460. Full API reference for developers →

Get free access to Welwyn Hatfield data

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