Basement planning approval rate in Portsmouth
64% of 44 decided basement 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.
64%
Approval rate, all years, from 44 decided
44
decided basement applications in Portsmouth: 28 approved, 16 refused
58%
Recent rate, decided since 2022, from 12 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 Withdrawn applications are excluded.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 basement 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 |
|---|---|---|---|
| 25/01383/FUL | 2026 | Refused | Conversion of care home (Class C2) to form 5no. self-contained flats (Class C3) including alterations to front lightwell at basement level Auckland House 55 St Ronans Road Southsea PO4 0PP |
| 26/00012/FUL | 2026 | Refused | Conversion of basement level to form 1no. self-contained residential flat (Class C3), including installation of new windows to the front elevation either sid... Basement 79 Victoria Road North Southsea PO5 1PP |
| 25/00323/FUL | 2025 | Refused | Proposed basement conversion to provide additional living space Flat Ground Floor 8 St Andrews Road Southsea PO5 1ET |
| 23/01317/HOU | 2024 | Approved | Replace external staircase to rear and alterations to basement flat access; replacement shed and conservatory roof 17 Albany Road Southsea PO5 2AB |
| 22/01596/CS3 | 2023 | Approved | Installation of electric cables to rear basement of Guildhall following excavation of car park to install a trench Guildhall Guildhall Square Portsmouth PO1 2AB |
| 22/01597/LBC | 2023 | Approved | External and internal alterations at basement to rear of Guildhall to include Installation of electric cables and relocation of switchboard, following excava... Guildhall Guildhall Square Portsmouth PO1 2AB |
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
- Outbuilding and garden room 59%, 34 decided
- Porch 75%, 32 decided
- Garage conversion 56%, 9 decided
- Window and door 77%, 232 decided