Outbuilding and garden room planning approval rate in Portsmouth
59% of 34 decided outbuilding and garden room 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.
59%
Approval rate, all years, from 34 decided
34
decided outbuilding and garden room applications in Portsmouth: 20 approved, 14 refused
67%
Recent rate, decided since 2022, from 15 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 Withdrawn applications are excluded.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 outbuilding and garden room 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 |
|---|---|---|---|
| 25/00166/CPL | 2025 | Approved | Application for a Certificate of Lawfulness of proposed use or development for the construction of outbuilding in rear garden. 24 Second Avenue Portsmouth PO6 1JS |
| 25/00896/CPE | 2025 | Approved | Application for Certificate of Lawful Development for existing use of outbuildings as nursery staff room 232 Southampton Road Portsmouth PO6 4QD |
| 25/01174/DEM | 2025 | Approved | Demolition of University House and two associated annex buildings University House Winston Churchill Avenue Portsmouth PO1 2UP |
| 23/01286/PLAREG | 2024 | Refused | Retrospective application for the construction of outbuilding to front garden. 40 Ludlow Road Portsmouth PO6 3SW |
| 22/00435/HOU | 2023 | Refused | Conversion of existing outbuilding to residential area, incorporating construction of additional floor and link extension at ground & first floor levels. 3 Arran Close Portsmouth PO6 3UD |
| 22/01731/PLAREG | 2023 | Refused | Retrospective application for construction of outbuilding 327 London Road Hilsea Portsmouth PO2 9HQ |
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
- Side extension 34%, 79 decided
- Loft conversion and dormer 36%, 201 decided
- Rooflight 78%, 81 decided
- Porch 75%, 32 decided
- Garage conversion 56%, 9 decided
- Basement 64%, 44 decided
- Window and door 77%, 232 decided