Single-storey rear extension planning approval rate in Portsmouth
55% of 420 decided single-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.
55%
Approval rate, all years, from 420 decided
420
decided single-storey rear extension applications in Portsmouth: 229 approved, 191 refused
56%
Recent rate, decided since 2022, from 165 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 Withdrawn applications are excluded.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 single-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.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/00048/GPDC | 2026 | Refused | Construction of single storey rear extension with flat roof, extending 4.5m beyond the rear wall, with a height of 3m to the eaves and maximum height of 3.2m 83 Balfour Road Portsmouth PO2 0NH |
| 25/01321/HOU | 2026 | Refused | Construction of single storey rear extension with raised decking area and alterations to roof including gable build-up and rear dormer 124 Highbury Grove Portsmouth PO6 2RT |
| 25/01397/HOU | 2026 | Refused | Construction of a 3 storey front extension; addition of a second floor including the remodelling of the rear elevation (with Juliet balconies at first and se... 12 Wilberforce Road Southsea PO5 3DR |
| 25/01444/CPL | 2026 | Approved | Application for certificate of lawful development for proposed construction of single storey rear extension 26 Oxford Road Southsea PO5 1NR |
| 26/00001/GPDC | 2026 | Approved | Construction of single storey rear extension; extending 6m from the rear wall, with a maximum height of 3m and measuring 3m to the eaves 98 Laburnum Grove Portsmouth PO2 0ES |
| 24/00076/GPDC | 2025 | Approved | Construction of single storey rear extension; extending 4.01m from the rear wall, with a maximum height of 3.2m and measuring 2.5m to the eaves 72 Battenburg Avenue Portsmouth PO2 0SW |
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
- Two-storey rear extension 20%, 91 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