Basement planning approval rate in Kensington and Chelsea
90% of 3,371 decided basement 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.
90%
Approval rate, all years, from 3,371 decided
3,371
decided basement applications in Kensington and Chelsea: 3,041 approved, 330 refused
91%
Recent rate, decided since 2022, from 1,882 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 Withdrawn applications are excluded.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 2018 to 2025. 2 of 3,371 decided records have no year recorded. Coverage may have gaps within the date range.
1,882 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 basement 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/24/07101 | 2025 | Approved | Confirmation that the expansion of the health and fitness club on the ground and basement floors is lawful (Certificate of Lawful Proposed Development/Use) Units B, C and D, Basement and Ground Floor, 60 Sloane Avenue, LONDON, SW3 3DD |
| CL/24/08339 | 2025 | Approved | Alterations to the basement level to add a spiral wine store under the existing floor level with an access hatch (Certificate of Lawful Proposed Use/Developm... 72 Campden Street, LONDON, W8 7EN |
| CL/25/02394 | 2025 | Approved | Installation of an additional basement level 'mezzanine' floor between the two approved and implemented basement and lower basement levels, within confines o... Ruskin House, 35A Hyde Park Gate, LONDON, SW7 5DN |
| CON/24/07406 | 2025 | Refused | Details required by Condition 10 (contamination - verification report) of planning permission PP/22/01372 (Creation of single storey basement extension under... 13 Harley Gardens, LONDON, SW10 9SW |
| CON/24/07641 | 2025 | Refused | Details required by conditions 3a, b and g (submission of details) and 11 (Flood Risk Assessment and Drainage Strategy) of planning permission 20/02819 (Addi... 1 Cathcart Road, LONDON, SW10 9NL |
| CON/25/01702 | 2025 | Refused | Details required by condition 3 (Construction Traffic Management Plan (CTMP)) of planning permission 24/06268 (Installation of inward opening doors to living... 27 Cornwall Mews South, LONDON, SW7 4RZ |
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
- Single-storey rear extension 88%, 1,593 decided
- 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
- Window and door 93%, 4,500 decided