Side extension planning approval rate in Portsmouth
34% of 79 decided side extension applications in Portsmouth 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.
34%
Approval rate, all years, from 79 decided
79
decided side extension applications in Portsmouth: 27 approved, 52 refused
46%
Recent rate, decided since 2022, from 28 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 Withdrawn applications are excluded.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 2015 to 2026. 0 of 79 decided records have no year recorded. Coverage may have gaps within the date range.
28 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 Portsmouth, or read about permitted development in Portsmouth. An approval rate does not decide which route your property qualifies for.
Example side extension decisions in Portsmouth
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.
Visit Portsmouth's official website to find its planning register and search the references below. Descriptions may be shortened.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/01402/HOU | 2026 | Refused | Construction of second floor side extension 19 Hilltop Crescent Portsmouth PO6 1BB |
| 25/01434/HOU | 2026 | Refused | Construction of single storey side extension and garage 361 Havant Road Portsmouth PO6 1AA |
| 25/00012/GPDC | 2025 | Approved | Construction of single storey rear/side extension, extending 4.34m beyond the rear wall, with a height of 2.3m to the eaves and maximum height of 3.4m. 60 Edgeware Road Southsea PO4 8PT |
| 25/00075/CPL | 2025 | Approved | Application for certificate of lawful development for proposed construction of side extension, rear dormer window and change of hip to gable on side elevation 128 St Andrews Road Southsea PO5 1EX |
| 23/00840/CPL | 2024 | Refused | Lawful Development Certificate for the proposed construction of single-storey rear/side extension 10 St Georges Road Southsea Portsmouth PO4 9PL |
| 24/00397/CPL | 2024 | Approved | Application for certificate of lawful development for the proposed construction of a single storey side extension 70 Parkstone Avenue Southsea PO4 0QZ |
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 Portsmouth
- Single-storey rear extension 55%, 420 decided
- Two-storey rear extension 20%, 91 decided
- Wraparound extension 19%, 31 decided
- Loft conversion and dormer 36%, 201 decided
- Rooflight 78%, 81 decided
- Outbuilding and garden room 59%, 34 decided
- Porch 75%, 32 decided
- Garage conversion 56%, 9 decided
- Basement 64%, 44 decided
- Window and door 77%, 232 decided