Planning permission in Hillingdon
London Borough of Hillingdon is the local planning authority for Hillingdon, a London borough in Greater London. Below is what its official planning data shows — and a free check for any Hillingdon postcode.
What Hillingdon has published
| Dataset · national planning data index | Published |
|---|---|
| Conservation areas | 42 |
| Article 4 direction areas (permitted development removed) | 150 |
| Tree preservation zones | 0 |
| Listed building outlines | 441 |
| Local Plan documents | 0 |
Counts are read from planning.data.gov.uk and refreshed daily. A zero or dash means the council has not yet published that dataset to the national index — not that the designation doesn’t exist on the ground. We show what we found and tell you what we didn’t. We never infer a restriction — or the absence of one — from missing data.
Reading Hillingdon’s planning landscape
With 42 conservation areas on the official index, design and character carry real weight in Hillingdon decisions. Inside a conservation area the bar for external alterations rises, and some permitted development rights narrow — which side of a boundary your property sits on can change your project’s planning route entirely.
London Borough of Hillingdon has 150 Article 4 direction areas in force. An Article 4 direction removes specific permitted development rights, so work that would normally need no application — certain extensions, alterations, even paving — can require full permission. This is the single most common surprise we find for homeowners, and it is address-specific: the free check below reads it for your exact postcode.
Every application in Hillingdon is decided against national policy (the NPPF) and London Borough of Hillingdon’s adopted Local Plan. A Planning Policy report quotes the specific policies that apply to your project — verbatim, verified, and linked to the official documents.