Two-storey rear extension planning approval rate in Portsmouth
20% of 91 decided two-storey rear 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.
20%
Approval rate, all years, from 91 decided
91
decided two-storey rear extension applications in Portsmouth: 18 approved, 73 refused
11%
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 Withdrawn applications are excluded.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 2025. 0 of 91 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 two-storey rear 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 |
|---|---|---|---|
| 25/00004/HOU | 2025 | Refused | Construction of part two storey and part single storey rear extension 21 Mayfield Road Portsmouth PO2 0RP |
| 25/00349/FUL | 2025 | Refused | Construction of two storey rear extension and first floor extension to facilitate conversion of existing annex to 2no. 2-bedroom dwellings, and retention of... 56 Althorpe Drive Portsmouth PO3 5XB |
| 23/01444/HOU | 2024 | Refused | Construction of single storey front/side extension, and part single/part two storey rear extension (resubmission of 23/00735/HOU) 2 Oakhurst Gardens Portsmouth PO7 5AX |
| 24/01199/NMA | 2024 | Approved | Non-Material Amendment to planning permission 24/00878/HOU to seek approval of amended description to be 'Construction of first-floor rear extension, two-sto... 8 Woodfield Avenue Portsmouth PO6 1AP |
| 23/00228/HOU | 2023 | Approved | Construction of two storey rear/side extension (following demolition of existing conservatory) 15 Mayfield Road Portsmouth PO2 0RP |
| 20/00720/HOU | 2022 | Approved | Proposed first floor rear extension. 39 Gritanwood Road Southsea PO4 9JR |
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
- Wraparound extension 19%, 31 decided
- Side extension 34%, 79 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