Side extension planning approval rate in Southampton
85% of 109 decided side extension applications in Southampton 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.
85%
Approval rate, all years, from 109 decided
109
decided side extension applications in Southampton: 93 approved, 16 refused
96%
Recent rate, decided since 2022, from 50 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 Withdrawn applications are excluded.
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.
Example side extension decisions in Southampton
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.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/01466/FUL | 2026 | Approved | Erection of a single storey side extension and garage conversion for annexe accommodation. 29 Lingwood Close Southampton SO16 7GB |
| 24/00616/FUL | 2025 | Approved | Erection of a two-storey side extension. 31 Somerton Avenue Southampton SO18 5BZ |
| 24/00659/FUL | 2025 | Approved | Part demolition of existing building and side extension to create additional garage workspace together with reconstruction of failed retaining wall 19 - 21 Botany Bay Road Southampton SO19 8LT |
| 25/00172/FUL | 2025 | Refused | Erection of a two-storey side extension to create a 2-bed house (resubmission 23/01562/FUL). 71 Violet Road Southampton SO16 3GL |
| 23/00194/FUL | 2023 | Refused | Erection of a two-storey side extension with hip to gable roof alterations, installation of skylights and a flat roof dormer on rear elevation (Resubmission... 59 Shanklin Road Southampton SO15 7RG |
| 21/00731/FUL | 2021 | Refused | Erection of a 2-storey side extension to form annexe accommodation 10 Abbotsfield Close Southampton SO16 5SP |
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 Southampton
- Single-storey rear extension 94%, 229 decided
- Two-storey rear extension 76%, 87 decided
- Wraparound extension 98%, 44 decided
- Loft conversion and dormer 90%, 49 decided
- Rooflight 80%, 15 decided
- Outbuilding and garden room 83%, 36 decided
- Porch 88%, 24 decided
- Garage conversion 91%, 11 decided
- Basement 92%, 13 decided
- Window and door 93%, 46 decided