Free planning check
Free Westminster planning permission check
Check in 23 seconds whether your Westminster project needs planning permission, and what the council has approved near you. £995 planning drawings, paid only when the council approves. Council and Portal fees are paid separately at submission.
About the planning data
Checked against 20.6 million UK planning applications on file across 420 planning authorities. Approval rates from 2,343,419 decisions we classified across 181 councils in England.
Westminster approval rates by project type
Historical approval rates in our archive, grouped by project type. These describe recorded decisions, not the chance of approval for your proposal. Checked against 20.6 million UK planning applications on file across 420 planning authorities. Approval rates from 2,343,419 decisions we classified across 181 councils in England.
| Project type | Approval rate | Decided |
|---|---|---|
| Single-storey rear extension | 86% | 1,743 |
| Two-storey rear extension | 84% | 287 |
| Wraparound extension | 72% | 46 |
| Side extension | 87% | 242 |
| Loft conversion and dormer | 88% | 1,818 |
| Rooflight | 90% | 2,256 |
| Outbuilding and garden room | 83% | 164 |
| Porch | 84% | 495 |
| Garage conversion | 90% | 58 |
| Basement | 93% | 6,348 |
| Window and door | 89% | 10,172 |
A rate is only shown where at least 8 applications of that type were decided; smaller samples are shown as unknown. Withdrawn and undecided records are excluded. These figures cover all recorded years, including records without a year. Full Westminster approval rates.
Application guidance in Westminster
Westminster's supporting-document page links its 2026 Local List of Validation Requirements. Conservation-area audits give local design context, but the council warns that older audits can refer to superseded policies. Read the appropriate audit alongside the current policy framework and application checklist.
- Westminster Article 4 directions and address map
- Westminster conservation areas and audits
- Westminster current validation list and supporting reports
- Westminster conservation audits and guidance, L to Z
Sources reviewed . Check the source maps, wording and effective dates against your property and proposed work.
Application records to compare
Selected archive records, not a representative sample or a prediction for your address. The descriptions below are archive excerpts and may be shortened; read the original decision and plans before relying on them.
- 25/03765/FULL · Recorded refused (2026)
Erection of a single storey ground floor rear extension to Flat 1 with creation of roof terrace above to serve Flat 2.
Search the council register for 25/03765/FULL - 25/03994/FULL · Recorded approved (2026)
Erection of a single storey side/ rear extension.
Search the council register for 25/03994/FULL
Compare the property type, works and application route. A scheme involving flats or several alterations is not directly comparable to a simple house extension. Read the archive's coverage and limitations.
Westminster planning resources
Check the authority's current records for the property's planning history, application requirements and local restrictions.
Prepare for your planning application
Questions about planning in Westminster
Do I need planning permission for my project in Westminster?
Some house extensions, loft conversions and outbuildings can use permitted development rights in Westminster, but size alone does not establish eligibility. Check the property type, previous extensions, planning conditions and the rules for the proposed work. Householder rights do not apply to flats. Conservation areas and Article 4 directions restrict particular rights; they do not automatically require an application for every change. Listed building consent is a separate requirement for works affecting a listed building's special interest.
What is the planning approval rate in Westminster?
It depends on the project type. 86% of 1,743 decided single-storey rear extension applications in Westminster were approved. 88% of 1,818 decided loft conversion and dormer applications in Westminster were approved. Checked against 20.6 million UK planning applications on file across 420 planning authorities. Approval rates from 2,343,419 decisions we classified across 181 councils in England. Every project type is on the Westminster approval rates page.
Read the official guidance on when permission is required, listed buildings and conservation areas and planning decision periods.
Approval rates are computed from 2,343,419 decided applications across 181 councils, published by each council. The free check is guidance from the public record, not a council decision.