Side extension planning approval rate in Lewisham
74% of 571 decided side extension applications in Lewisham 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.
74%
Approval rate, all years, from 571 decided
571
decided side extension applications in Lewisham: 421 approved, 150 refused
75%
Recent rate, decided since 2022, from 247 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 Withdrawn applications are excluded.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 571 decided records have no year recorded. Coverage may have gaps within the date range.
247 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 Lewisham, or read about permitted development in Lewisham. An approval rate does not decide which route your property qualifies for.
Example side extension decisions in Lewisham
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 Lewisham's planning register using the references below. Descriptions may be shortened; read the complete proposal and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| DC/25/142049 | 2026 | Approved | The construction of a single storey rear extension, replacement ground floor side extension, extension at first floor level to the side and all associated wo... 14 DACRES ROAD, LONDON, SE23 2NW |
| DC/25/142060 | 2026 | Approved | The construction of a first floor side extension and all associated works at 88 Canonbie Road, SE23. 88 CANONBIE ROAD, LONDON, SE23 3AG |
| DC/25/142235 | 2026 | Refused | Construction of a two-storey side extension and single-storey ground floor rear extension at 26 Haddington Road BR1. 26 HADDINGTON ROAD, BROMLEY, BR1 5RH |
| DC/26/142555 | 2026 | Approved | Application for a Lawful Development Certificate (proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) Class A of Sched... 10 HOLME LACEY ROAD, LONDON, SE12 0HR |
| DC/24/138107 | 2025 | Refused | Construction of a hip to gable side extension and a roof extension in the rear roof slope, together with the installation of roof lights in the front, side a... 6 CHINBROOK ROAD, LONDON, SE12 9TH |
| DC/25/139097 | 2025 | Refused | Construction of a double storey side extension, chimney removal, internal alterations, and all associated works at 62 Sydenham Park, SE26. 62 SYDENHAM PARK, LONDON, SE26 4EQ |
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 Lewisham
- Single-storey rear extension 77%, 4,139 decided
- Two-storey rear extension 70%, 705 decided
- Wraparound extension 83%, 729 decided
- Loft conversion and dormer 69%, 713 decided
- Rooflight 86%, 2,030 decided
- Outbuilding and garden room 83%, 413 decided
- Porch 85%, 142 decided
- Garage conversion 92%, 110 decided
- Basement 81%, 770 decided
- Window and door 93%, 3,017 decided