Hertfordshire

Hertsmere planning data

5,819 planning applications from Hertsmere. 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.

5,819

Applications

—

Enforcement notices

754

Appeals

2000–2026

Date range

What Hertsmere decides

Hertsmere has approved 85.55% of the 4,442 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%).

85.55%

Approved, of 4,442 decided

Median days to a decision

77.2

Average days

What it mostly decides

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

Application type	Applications	Share
Householder	1,799	30.9%
Full	839	14.4%
Certificate	781	13.4%
Conditions	665	11.4%
Tree	621	10.7%

How approval rates and decision times vary across the country →

What Hertsmere 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 Hertsmere actually provides each one, across all 5,819 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 Hertsmere 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`	5,819	100.0%
Application type `application_type`	5,818	100.0%
Description of the works `description`	5,819	100.0%
Date received `received_date`	5,819	100.0%
Council reference `reference`	5,819	100.0%
Ward `ward`	5,816	99.9%
Agent's email `agent_email`	5,799	99.7%
Case officer `case_officer`	5,803	99.7%
Applicant's name `applicant_name`	5,666	97.4%
Status `status`	5,620	96.6%
Status (standardised wording) `status_normalized`	5,620	96.6%
Alternative reference `alternative_reference`	5,483	94.2%
Decision `decision`	5,365	92.2%
Decision date `decision_date`	5,368	92.2%
Decision (standardised wording) `decision_normalized`	5,332	91.6%

Partial — use with care

Information	Records with it	Coverage
Agent's phone `agent_phone`	5,221	89.7%
Postcode `postcode`	5,201	89.4%
Agent's name `agent_name`	5,096	87.6%
Who decided it (officer or committee) `decision_level`	4,712	81.0%
Agent's company `agent_company`	4,657	80.0%
Standardised type `standard_type`	3,954	67.9%

Rarely or never published

Information	Records with it	Coverage
Appeal decision `appeal_decision`	101	1.7%
Appeal decision (standardised wording) `appeal_decision_normalized`	101	1.7%
Type of development `development_type`	0	0.0%
Officer's recommendation `officer_recommendation`	0	0.0%

Not published by this council

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

Map coordinates (easting) Map coordinates (northing)

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 Hertsmere 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=287&limit=5"

Council id for Hertsmere is 287. Full API reference for developers →

Get free access to Hertsmere data

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