Two-storey rear extension planning approval rate in Westminster
84% of 287 decided two-storey rear extension 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.
84%
Approval rate, all years, from 287 decided
287
decided two-storey rear extension applications in Westminster: 240 approved, 47 refused
78%
Recent rate, decided since 2022, from 109 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 Withdrawn applications are excluded.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 2000 to 2026. 0 of 287 decided records have no year recorded. Coverage may have gaps within the date range.
109 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 two-storey rear extension 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 |
|---|---|---|---|
| 25/07553/FULL | 2026 | Refused | Replacement of lower ground floor rear extension; enlargement of existing two-storey side extension; works to loft level including installation of rooflights... |
| 25/07554/LBC | 2026 | Refused | Replacement of lower ground floor rear extension; enlargement of existing two-storey side extension; works to loft level including installation of rooflights... |
| 25/07728/FULL | 2026 | Refused | Erection of a first floor rear extension and associated works. |
| 24/04236/FULL | 2025 | Approved | Variation of condition 1 of permission dated 27 January 2021 (RN:20/00507/FULL) for erection of a mansard roof extension and two storey rear extension inclu... |
| 24/06981/FULL | 2025 | Approved | Erection of part one, part two storey rear extension, rebuild of existing rear closet wing, mansard roof extension and replacement of ground floor windows. |
| 24/07798/FULL | 2025 | Approved | Alterations to first and second floors including first floor rear extension to closet wing, replacement of second floor conservatory with new solid extension... First Floor And Second Floor Maisonette |
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
- 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
- Basement 93%, 6,348 decided
- Window and door 89%, 10,172 decided