Research & Data

London Planning Data

Original research and data analysis for London homeowners navigating the planning system. Approval rates, processing times, refusal trends, and policy guides — compiled by our MCIAT-chartered team.

Planning timeline on a tablet
Data

Planning Processing Times: Which Boroughs Are Slowest?

The 8-week statutory target is missed by most London boroughs. We map the reality — median weeks from validation to decision across all 33 councils.

See the data
Architect correcting planning drawings
Analysis

Top 5 Reasons London Planning Applications Get Refused

Over 80% of all household refusals in London share five root causes. Understanding them is the most direct path to first-time approval.

Read the analysis
Victorian terrace architectural detail in a London conservation area
Guide

Conservation Areas in London: Impact on Your Planning Application

62 conservation areas in Kensington and Chelsea. 7 in Barking. The density of conservation designations in your borough defines your planning risk profile.

Read the guide
Design tools and architectural drawings
Tool

Does Your Project Need Planning Permission?

Use our free permitted development checker to find out whether your extension, loft conversion, or outbuilding needs a full planning application.

Check now