Two-storey rear extension planning approval rate in Cornwall
98% of 45 decided two-storey rear extension applications in Cornwall 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.
98%
Approval rate, all years, from 45 decided
45
decided two-storey rear extension applications in Cornwall: 44 approved, 1 refused
92%
Recent rate, decided since 2022, from 12 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 Withdrawn applications are excluded.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 two-storey rear extension decisions in Cornwall
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 |
|---|---|---|---|
| PA26/00173 | 2026 | Approved | Two storey extension on the rear of the property to house a new kitchen/diner and additional bedrooms Tamar View Farm Sherwell Callington Cornwall PL17 8HY |
| PA25/01097 | 2025 | Approved | The removal of a single storey extension to the rear of the property and the erection of a two storey extension in its place. Install solar panels to the roo... Tremythek Higher Bosavern St Just Penzance Cornwall TR19 7RA |
| PA25/01579 | 2025 | Approved | Two storey rear extension to enlarge kitchen/dining room and bedrooms 14 Fairfield Park Altarnun Launceston Cornwall PL15 7RQ |
| PA23/10253 | 2024 | Refused | Two storey rear extension to replace existing single storey rear extension. Reens Barn Treen St Levan Penzance Cornwall TR19 6LF |
| PA22/09569 | 2023 | Approved | Two-storey rear extension to dwelling. 9 Home Park Landrake Saltash Cornwall PL12 5EW |
| PA23/02998 | 2023 | Approved | Proposed replacement of existing two-storey rear extensions, with a new two storey extensions on similar footprint. Proposed replacement of existing degradin... 15 High Street Camelford Cornwall PL32 9PQ |
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 Cornwall
- Single-storey rear extension 97%, 146 decided
- Wraparound extension 100%, 9 decided
- Side extension 98%, 57 decided
- Loft conversion and dormer 97%, 97 decided
- Rooflight 98%, 52 decided
- Outbuilding and garden room 95%, 125 decided
- Porch 100%, 63 decided
- Garage conversion 94%, 47 decided
- Basement 100%, 11 decided
- Window and door 96%, 187 decided