West London

Hillingdon planning data

10,849 planning applications from Hillingdon. 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. 12 pieces of information are filled in on at least 90% of records.

10,849

Applications

—

Enforcement notices

2,434

Appeals

2023–2026

Date range

What Hillingdon decides

Hillingdon has approved 83.75% of the 9,847 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%).

83.75%

Approved, of 9,847 decided

Median days to a decision

71.7

Average days

What it mostly decides

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

Application type	Applications	Share
Other	10,849	100.0%

How approval rates and decision times vary across the country →

What Hillingdon 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 Hillingdon actually provides each one, across all 10,849 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 Hillingdon 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`	10,849	100.0%
Agent's name `agent_name`	10,848	100.0%
Case officer `case_officer`	10,849	100.0%
Description of the works `description`	10,849	100.0%
Date received `received_date`	10,849	100.0%
Council reference `reference`	10,849	100.0%
Status `status`	10,849	100.0%
Ward `ward`	10,829	99.8%
Status (standardised wording) `status_normalized`	10,796	99.5%
Decision `decision`	10,332	95.2%
Decision date `decision_date`	10,331	95.2%
Decision (standardised wording) `decision_normalized`	10,281	94.8%

Partial — use with care

Information	Records with it	Coverage
Postcode `postcode`	3,897	35.9%

Rarely or never published

Information	Records with it	Coverage
Appeal decision (standardised wording) `appeal_decision_normalized`	0	0.0%
Applicant's name `applicant_name`	0	0.0%
Application type `application_type`	0	0.0%
Standardised type `standard_type`	0	0.0%

Not published by this council

Hillingdon'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 company Agent's email Agent's phone Alternative reference Appeal decision Who decided it (officer or committee) Type of development Map coordinates (easting) Map coordinates (northing) 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 Hillingdon 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=142&limit=5"

Council id for Hillingdon is 142. Full API reference for developers →

Get free access to Hillingdon data

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