Free planning check
Free Hounslow planning permission check
Check in 23 seconds whether your Hounslow project needs planning permission, and what the council has approved near you. Phase 1 planning drawings: standard rear or side extensions from £995 and loft conversions from £1,495, 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.
Hounslow 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 | 80% | 11,847 |
| Two-storey rear extension | 99% | 1,086 |
| Wraparound extension | 95% | 374 |
| Side extension | 98% | 876 |
| Loft conversion and dormer | 95% | 2,085 |
| Rooflight | 93% | 643 |
| Outbuilding and garden room | 82% | 188 |
| Porch | 98% | 219 |
| Garage conversion | 97% | 175 |
| Basement | 97% | 204 |
| Window and door | 99% | 405 |
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 Withdrawn and undecided records are excluded.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 Hounslow approval rates.
Application guidance in Hounslow
Hounslow publishes different checklists for householder proposals, certificates, prior approval and other applications. Its submission guidance also asks for contextual site photographs and gives document naming instructions; use the checklist matching the application you are making.
- Hounslow Article 4 directions and notices
- Hounslow conservation areas and map
- Hounslow application requirements
- Hounslow checklists by application type
Sources reviewed . Check the source maps, wording and effective dates against your property and proposed work.
What reviewed local decisions show
These examples use official planning records. Each identifies the decision date and links to the evidence reviewed. They are not Planning Approvals projects or a prediction for another property.
Vine Lodge: extra homes did not outweigh heritage and site impacts
P/2024/2168 · APP/F5540/W/25/3371379 · Appeal dismissed, 20 February 2026
The proposal would demolish a locally listed house in Spring Grove Conservation Area and build six flats. The inspector found unjustified heritage loss and problems with housing mix, parking-related disturbance, trees, biodiversity evidence and securing the carbon contribution, despite accepting the outlook and privacy arrangements.
What to check: A site can pass some neighbour-impact tests and still fail overall. For replacement housing, address the existing building’s significance and the supporting evidence before assuming additional homes justify demolition.
Read the appeal decision (PDF)
Related guidance: New-build planning permission · After a refusal
Check the planning register for the issued notice, exact conditions and any later appeal or revised application. A committee resolution is not a substitute for those documents.
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.
- PA/2025/3346 · Recorded approved (2026)
Ground floor rear extension 4.50 metres deep, maximum height 3.00 metres, 3.00 metres high to the eaves.
Open the council record for PA/2025/3346 - PA/2025/3535 · Recorded refused (2026)
Ground floor rear extension 6.00 metres deep, maximum height 3.00 metres, 3.00 metres high to the eaves.
Open the council record for PA/2025/3535
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.
Hounslow 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 Hounslow
Do I need planning permission for my project in Hounslow?
Some house extensions, loft conversions and outbuildings can use permitted development rights in Hounslow, 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 Hounslow?
It depends on the project type. 80% of 11,847 decided single-storey rear extension applications in Hounslow were approved. 95% of 2,085 decided loft conversion and dormer applications in Hounslow 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 Hounslow 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.