Single-storey rear extension planning approval rate in Horsham
95% of 1,102 decided single-storey rear extension applications in Horsham 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 1,102 decided
1,102
decided single-storey rear extension applications in Horsham: 1,046 approved, 56 refused
95%
Recent rate, decided since 2022, from 366 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 Withdrawn applications are excluded.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 1,102 decided records have no year recorded. Coverage may have gaps within the date range.
366 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 Horsham, or read about permitted development in Horsham. An approval rate does not decide which route your property qualifies for.
Example single-storey rear extension decisions in Horsham
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 Horsham's official website to find its planning register and search the references below. Descriptions may be shortened.
| Reference | Year | Decision | Application |
|---|---|---|---|
| DC/25/1238 | 2026 | Approved | Erection of a single storey rear extension. St Brigets Cottage Hayes Lane Slinfold West Sussex RH13 0SN |
| DC/25/1553 | 2026 | Approved | Non Material Amendment to previously approved application DC/25/0491 (Erection of a single storey rear extension and internal modifications (Householder Appl... Causeway Lodge 10 Causeway Horsham West Sussex RH12 1HE |
| DC/25/1823 | 2026 | Approved | Erection of a single storey rear extension. 25 West Street Storrington West Sussex RH20 4DZ |
| DC/24/1948 | 2025 | Refused | Installation of a heat pump, solar panels and log burner flue. Erection of a single storey front garage extension, rear dormer and changes to external materi... 25 Church Lane Upper Beeding West Sussex BN44 3HP |
| DC/25/0153 | 2025 | Refused | Part-retrospective erection of a single storey rear extension, conversion of loft into habitable living space, replacement of front flat roof with a pitched... The Paddocks Stane Street Five Oaks West Sussex RH14 9AG |
| DC/23/1050 | 2024 | Refused | Erection of a single-storey outbuilding within rear garden. 3 Chalice Walk High Street Rusper West Sussex RH12 4FA |
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 Horsham
- Two-storey rear extension 91%, 444 decided
- Wraparound extension 97%, 231 decided
- Side extension 93%, 721 decided
- Loft conversion and dormer 89%, 258 decided
- Rooflight 94%, 258 decided
- Outbuilding and garden room 89%, 292 decided
- Porch 98%, 181 decided
- Garage conversion 94%, 160 decided
- Basement 81%, 27 decided
- Window and door 93%, 338 decided