Side extension planning approval rate in South Downs National Park
91% of 139 decided side 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.
91%
Approval rate, all years, from 139 decided
139
decided side extension applications in South Downs National Park: 127 approved, 12 refused
92%
Recent rate, decided since 2022, from 48 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 Withdrawn applications are excluded.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 side 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.
| Reference | Year | Decision | Application |
|---|---|---|---|
| SDNP/24/02570/HOUS | 2025 | Approved | Demolition of existing conservatory and chimney stack, replace with two storey side extension and single storey flat roof extension with roof terrace. Blackbush House B2141 Old West Dean Road To High Street Chilgrove West Dean West Sussex PO18 9NJ |
| SDNP/24/04718/HOUS | 2025 | Approved | Single storey side extension, alteration to pitch of existing extension roof and insertion of dormer window, alterations to external fenestration and various... Holters Green Beechwood Lane Cooksbridge East Sussex BN7 3QG |
| SDNP/24/04719/LIS | 2025 | Approved | Single storey side extension, alteration to pitch of existing extension roof and insertion of dormer window, alterations to external fenestration and various... Holters Green Beechwood Lane Cooksbridge East Sussex BN7 3QG |
| SDNP/25/03121/HOUS | 2025 | Refused | Proposed side extension to create new garage, workshop and home gym with room in the roof above with dormers. Addition of PV panels to south facing roofs. Ou... Tiercel Brewells Lane Liss Hampshire GU33 7JA |
| SDNP/24/00155/HOUS | 2024 | Refused | Two storey side extension and internal alterations. Locksash Farm House Locksash Lane West Marden West Sussex PO18 9DZ |
| SDNP/24/00156/LIS | 2024 | Refused | Two storey side extension and internal alterations. Locksash Farm House Locksash Lane West Marden West Sussex PO18 9DZ |
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
- 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