Side extension planning approval rate in Southwark
95% of 644 decided side extension applications in Southwark 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.
95%
Approval rate, all years, from 644 decided
644
decided side extension applications in Southwark: 613 approved, 31 refused
95%
Recent rate, decided since 2022, from 350 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 Withdrawn applications are excluded.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 2001 to 2026. 0 of 644 decided records have no year recorded. Coverage may have gaps within the date range.
350 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 Southwark, or read about permitted development in Southwark. An approval rate does not decide which route your property qualifies for.
Example side extension decisions in Southwark
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 Southwark's planning register using the references below. Descriptions may be shortened; read the complete proposal and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/AP/3182 | 2026 | Approved | Construction of a single storey rear/side extension with new patio and solar panels to roof, inclusion of external insulation to dwelling. Replacement of exi... |
| 25/AP/3420 | 2026 | Approved | Construction of a single storey side extension, demolition and rebuilding of a boundary garden wall, installation of a new fixed skylight at roof level to th... |
| 25/AP/3470 | 2026 | Approved | Construction of a single-storey infill extension to the existing rear outrigger and side return. |
| 24/AP/1963 | 2025 | Refused | Construction of first floor side extension over existing single storey ground floor side extension with rooflights and photovoltaic panels. Construction of s... |
| 25/AP/0288 | 2025 | Refused | Ground floor side return and rear extension, dormer loft extension, installation of sash windows to the front elevation, rooflight to the outrigger roof, rem... |
| 25/AP/0777 | 2025 | Refused | Construction of 1no. single-storey rear extension and 1no. two-storey side extension. Construction of rear dormer extension with 1no. rooflight. |
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 Southwark
- Single-storey rear extension 92%, 2,018 decided
- Two-storey rear extension 92%, 470 decided
- Wraparound extension 95%, 745 decided
- Loft conversion and dormer 86%, 1,006 decided
- Rooflight 95%, 1,278 decided
- Outbuilding and garden room 90%, 307 decided
- Porch 97%, 90 decided
- Garage conversion 98%, 54 decided
- Basement 95%, 2,064 decided
- Window and door 95%, 1,546 decided