Hertfordshire

Dacorum planning data

8,129 planning applications from Dacorum. 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.

8,129

Applications

510

Enforcement notices

8,944

Appeals

1990–2026

Date range

What Dacorum decides

Dacorum has approved 87.87% of the 6,635 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%).

87.87%

Approved, of 6,635 decided

Median days to a decision

Average days

What it mostly decides

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

Application type	Applications	Share
Householder	2,695	33.2%
Full	1,212	14.9%
Tree	1,118	13.8%
Conditions	955	11.7%
Certificate	673	8.3%

How approval rates and decision times vary across the country →

What Dacorum 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 Dacorum actually provides each one, across all 8,129 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 Dacorum 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`	8,129	100.0%
Application type `application_type`	8,129	100.0%
Description of the works `description`	8,129	100.0%
Date received `received_date`	8,129	100.0%
Council reference `reference`	8,129	100.0%
Ward `ward`	8,117	99.9%
Status `status`	8,109	99.8%
Applicant's name `applicant_name`	7,958	97.9%
Case officer `case_officer`	7,904	97.2%
Decision `decision`	7,743	95.3%
Decision date `decision_date`	7,743	95.3%
Who decided it (officer or committee) `decision_level`	7,730	95.1%
Decision (standardised wording) `decision_normalized`	7,716	94.9%
Status (standardised wording) `status_normalized`	7,664	94.3%
Postcode `postcode`	7,363	90.6%

Partial — use with care

Information	Records with it	Coverage
Alternative reference `alternative_reference`	7,311	89.9%
Agent's email `agent_email`	6,644	81.7%
Agent's name `agent_name`	6,611	81.3%
Agent's phone `agent_phone`	6,417	78.9%
Agent's company `agent_company`	6,020	74.1%
Standardised type `standard_type`	5,665	69.7%

Rarely or never published

Information	Records with it	Coverage
Appeal decision `appeal_decision`	161	2.0%
Appeal decision (standardised wording) `appeal_decision_normalized`	161	2.0%
Type of development `development_type`	0	0.0%
Officer's recommendation `officer_recommendation`	0	0.0%

Not published by this council

Dacorum'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 Dacorum 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=217&limit=5"

Council id for Dacorum is 217. Full API reference for developers →

Get free access to Dacorum data

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