Basement planning approval rate in Westminster
93% of 6,348 decided basement 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.
A similar project nearby can help you understand the council's decisions. Its outcome does not establish what will be acceptable at your address.
93%
Approval rate, all years, from 6,348 decided
6,348
decided basement applications in Westminster: 5,927 approved, 421 refused
89%
Recent rate, decided since 2022, from 2,075 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 Withdrawn applications are excluded.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 1988 to 2026. 13 of 6,348 decided records have no year recorded. Coverage may have gaps within the date range.
2,075 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 Westminster, or read about permitted development in Westminster. An approval rate does not decide which route your property qualifies for.
Example basement decisions in Westminster
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 Westminster's planning register using the references below. Descriptions may be shortened; read the complete proposal and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 24/02467/FULL | 2026 | Approved | Redevelopment of buildings at 5 - 9 Great Newport Street comprising demolition behind retained facades excluding the listed building, excavation of small are... Development Site At |
| 24/03977/FULL | 2026 | Approved | Partial demolition, rebuild and retrofit of the existing building to provide a building comprising basement, ground and seven upper floors, with part 8th, 9t... |
| 25/03131/FULL | 2026 | Approved | Variation of Conditions 1 and 16 of planning permission dated 23 July 2015 (ref. 15/02280/FULL) for Variation of Condition 1 of planning permission dated 19... |
| 25/06550/FULL | 2026 | Refused | Installation of security bars to front windows of basement and ground floors. |
| 25/06551/LBC | 2026 | Refused | Installation of security bars to front windows of basement and ground floors. |
| 25/07920/CLEUD | 2026 | Refused | Use of the basement as an independent flat for in excess of 4 years, prior to the date of this application and prior to the 2024 change in legislation, with... |
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 Westminster
- Single-storey rear extension 86%, 1,743 decided
- Two-storey rear extension 84%, 287 decided
- Wraparound extension 72%, 46 decided
- Side extension 87%, 242 decided
- Loft conversion and dormer 88%, 1,818 decided
- Rooflight 90%, 2,256 decided
- Outbuilding and garden room 83%, 164 decided
- Porch 84%, 495 decided
- Garage conversion 90%, 58 decided
- Window and door 89%, 10,172 decided