Single-storey rear extension planning approval rate in Kensington and Chelsea
88% of 1,593 decided single-storey rear extension applications in Kensington and Chelsea 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.
A similar project nearby can help you understand the council's decisions. Its outcome does not establish what will be acceptable at your address.
88%
Approval rate, all years, from 1,593 decided
1,593
decided single-storey rear extension applications in Kensington and Chelsea: 1,401 approved, 192 refused
89%
Recent rate, decided since 2022, from 999 decided
How to read these rates
These are historical outcomes for the applications in our archive, not the chance of approval for your property. Compare the same project type and read the decided count alongside each percentage.
About the planning data
Rate = approved divided by approved plus refused, using the decisions in our classified archive. Rates are withheld as unknown where fewer than 8 records of that project type were decided. Withdrawn applications are excluded. The eight-record threshold is a display rule, not a guarantee that a sample is statistically reliable.
Recent means records dated 2022 or later. Records without a year are excluded from the recent rate but remain in the all-years figure. Historical coverage varies by council, and duplicate application references may remain in the archive.
Approval rates from 2,343,419 decisions we classified across 181 councils in England. The wider 20.6 million application catalogue is accessible through PlanIT; it is not the dataset used to calculate these percentages.
Read the full methodology and coverage notes.
Project types and outcomes are classified from council records. Check the original application and decision notice before relying on an individual example. A page rebuild does not mean every council record has just been refreshed.
Coverage for this project type
Dated records in this archive span 2019 to 2025. 0 of 1,593 decided records have no year recorded. Coverage may have gaps within the date range.
999 decided records are dated 2022 or later. This is an archive count, not a measure of all current council activity.
These project categories can include different application routes and proposals combining several kinds of work. Read the proposal and decision type before comparing it with your project.
Check planning requirements in Kensington and Chelsea, or read about permitted development in Kensington and Chelsea. An approval rate does not decide which route your property qualifies for.
Example single-storey rear extension decisions in Kensington and Chelsea
These examples deliberately include approved and refused applications where available. They are not a representative sample or a list of the latest decisions. Look up each reference on the council's planning search to read the plans and decision notice.
Search Kensington and Chelsea's planning register using the references below. Descriptions may be shortened; read the complete proposal and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| CL/24/07264 | 2025 | Approved | Construction of single storey outbuilding to part of rear patio garden to provide staff rest room facility and store. (Certificate of Lawful Proposed Use/ De... 28 Warwick Road, LONDON, SW5 9UD |
| CL/25/02393 | 2025 | Approved | Construction of single storey rear extension (Certificate of Lawful Proposed Development/Use) 67 Abbotsbury Road, LONDON, W14 8EL |
| CL/25/02403 | 2025 | Refused | Single storey rear extension to dwelling house. (Certificate of lawful proposed development.) 55 Hillgate Place, LONDON, W8 7SS |
| CL/25/03181 | 2025 | Approved | Erection of a single storey rear garden room. (Certificate of Proposed Use/Development) 14 Horbury Crescent, LONDON, W11 3NF |
| NMA/25/05045 | 2025 | Refused | Non-material amendment to planning permission 25/02165 to update approved casement windows with timber-textured, white uPVC windows, retain identical style,... The Cottage, 238 Walmer Road, LONDON, W11 4PQ |
| PP/25/02276 | 2025 | Refused | Erection of a single storey infill extension to rear and changes to existing shopfront; installation of freestanding, metal framed, timber slatted bin and bi... 18-22 Holbein Place, LONDON, SW1W 8NL |
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.
Other project types in Kensington and Chelsea
- Two-storey rear extension 88%, 178 decided
- Wraparound extension 77%, 47 decided
- Side extension 90%, 270 decided
- Loft conversion and dormer 82%, 1,062 decided
- Rooflight 92%, 1,447 decided
- Outbuilding and garden room 87%, 247 decided
- Porch 94%, 192 decided
- Garage conversion 100%, 51 decided
- Basement 90%, 3,371 decided
- Window and door 93%, 4,500 decided