Loft conversion and dormer planning approval rate in Horsham
89% of 258 decided loft conversion and dormer 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.
89%
Approval rate, all years, from 258 decided
258
decided loft conversion and dormer applications in Horsham: 230 approved, 28 refused
88%
Recent rate, decided since 2022, from 85 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 Withdrawn applications are excluded.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 loft conversion and dormer 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.
| Reference | Year | Decision | Application |
|---|---|---|---|
| DC/25/1694 | 2026 | Approved | Conversion of garage to form habitable living space, with connection to bungalow on side (east) elevation. Erection of an attached single garage. Addition of... 4 Silver Glade West Chiltington West Sussex RH20 2RQ |
| DC/25/1849 | 2026 | Approved | Part demolition of existing outbuilding. Erection of an outbuilding consisting of a double carport, gym space and shower with seating and sleeping / storage... Calderbank Ifield Wood Ifield West Sussex RH11 0LE |
| DC/25/1862 | 2026 | Refused | Erection of a rear dormer extension. 4 The Green Old Guildford Road Broadbridge Heath West Sussex RH12 3JY |
| DC/26/0052 | 2026 | Approved | Roof extensions and alterations, erection of a front bay window and porch, installation of black cladding and associated alterations. Throxenby High Street Upper Beeding West Sussex BN44 3TQ |
| DC/24/1732 | 2025 | Refused | Erection of a rear dormer extension to the roof slope, raising of rear half gable to full gable and raising of side half gable to full gable (Lawful Developm... Rose Cottage Garden Wood Close West Chiltington West Sussex RH20 2NN |
| DC/25/1032 | 2025 | Refused | Prior Notification for the construction of an additional storey over the existing two storey house. 5 Netherton Close Southwater West Sussex RH13 9BL |
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
- Single-storey rear extension 95%, 1,102 decided
- Two-storey rear extension 91%, 444 decided
- Wraparound extension 97%, 231 decided
- Side extension 93%, 721 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