Basement planning approval rate in South Downs National Park
95% of 19 decided basement applications in South Downs National Park 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.
95%
Approval rate, all years, from 19 decided
19
decided basement applications in South Downs National Park: 18 approved, 1 refused
90%
Recent rate, decided since 2022, from 10 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 Withdrawn applications are excluded.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 19 decided records have no year recorded. Coverage may have gaps within the date range.
10 decided records are dated 2022 or later. This is an archive count, not a measure of all current council activity.
Small archive sample: only 19 decided records support this figure. A small number of different outcomes can substantially change the percentage.
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 South Downs National Park, or read about permitted development in South Downs National Park. An approval rate does not decide which route your property qualifies for.
Example basement decisions in South Downs National Park
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 South Downs National Park's official website to find its planning register and search the references below. Descriptions may be shortened.
| Reference | Year | Decision | Application |
|---|---|---|---|
| SDNP/25/02588/LIS | 2025 | Approved | Raising of reception room floor, installation of underfloor heating, tanking of cellar and internal repairs where necessary The Castle Lodge Castle Precincts Lewes East Sussex BN7 1YS |
| SDNP/25/03768/HOUS | 2025 | Approved | Single storey side extension including Non-habitable Basement Petersfield Lodge Winchester Road Langrish Petersfield Hampshire GU34 3PD |
| SDNP/23/04467/LIS | 2024 | Refused | Removal of unauthorised porch infill on the west elevation and replacement with a flemish bond old stock brick half infill with timber posts painted off blac... 8 High Street Ditchling East Sussex BN6 8TA |
| SDNP/22/01771/HOUS | 2023 | Approved | Structural repairs to prevent the deterioration of a listed building together with modification and making safer some aspects of the building including exter... Greta House South Hill Droxford Hampshire SO32 3PB |
| SDNP/22/01772/LIS | 2023 | Approved | Structural repairs to prevent the deterioration of a listed building together with modification and making safer some aspects of the building including exter... Greta House South Hill Droxford Hampshire SO32 3PB |
| SDNP/22/03979/FUL | 2023 | Approved | Retrospective application for the installation of a ground source heat pump within field and ground source heat pump boiler within existing cellar. Fittleworth House Bedham Lane Fittleworth West Sussex RH20 1JH |
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 South Downs National Park
- Single-storey rear extension 93%, 248 decided
- Two-storey rear extension 90%, 89 decided
- Wraparound extension 90%, 20 decided
- Side extension 91%, 139 decided
- Loft conversion and dormer 90%, 81 decided
- Rooflight 93%, 85 decided
- Outbuilding and garden room 89%, 166 decided
- Porch 96%, 57 decided
- Garage conversion 95%, 40 decided
- Window and door 94%, 257 decided