Single-storey rear extension planning approval rate in South Downs National Park
93% of 248 decided single-storey rear extension 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.
93%
Approval rate, all years, from 248 decided
248
decided single-storey rear extension applications in South Downs National Park: 230 approved, 18 refused
90%
Recent rate, decided since 2022, from 100 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 Withdrawn applications are excluded.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 2026. 0 of 248 decided records have no year recorded. Coverage may have gaps within the date range.
100 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 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 single-storey rear extension 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/25/02687/LDP | 2026 | Approved | Erection of single storey rear extension 35 Winterbourne Close Lewes East Sussex BN7 1JZ |
| SDNP/25/04224/HOUS | 2026 | Approved | Single storey rear extension and associated landscaping. The Old Rectory Cottage Graffham Street Graffham West Sussex GU28 0NJ |
| SDNP/25/04257/HOUS | 2026 | Approved | Single storey rear extension and garage conversion. 14 Downsview Drive Midhurst West Sussex GU29 9LW |
| SDNP/24/04778/HOUS | 2025 | Refused | Replacement single storey rear extension and associated works. Installation 1 no. roof light. Gastons Farm Shillinglee Road Shillinglee Northchapel West Sussex GU8 4SX |
| SDNP/24/04779/LIS | 2025 | Refused | Replacement single storey rear extension and associated works. Installation 1 no. roof light and secondary glazing throughout. Gastons Farm Shillinglee Road Shillinglee Northchapel West Sussex GU8 4SX |
| SDNP/25/01424/HOUS | 2025 | Refused | Single storey rear extension (Amended plans received 06.08.2025). Forge Cottage High Street Selborne Alton Hampshire GU34 3JW |
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
- 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
- Basement 95%, 19 decided
- Window and door 94%, 257 decided