Outbuilding and garden room planning approval rate in Cornwall
95% of 125 decided outbuilding and garden room 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.
95%
Approval rate, all years, from 125 decided
125
decided outbuilding and garden room applications in Cornwall: 119 approved, 6 refused
97%
Recent rate, decided since 2022, from 36 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 Withdrawn applications are excluded.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 outbuilding and garden room 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 |
|---|---|---|---|
| PA24/08783 | 2025 | Approved | Replacement of Fire Damaged Annex & Associated Works Old Farmhouse Trevurvas Lane Ashton Helston Cornwall TR13 9TY |
| PA25/01068 | 2025 | Approved | Retention of changes to layout and fenestration of annexe approved under PA12/03772 Little Glenrikki Penrose Penrose Lane St Ervan Wadebridge Cornwall PL27 7TB |
| PA25/03361 | 2025 | Approved | Front bedroom extension and rear/side annexe extension to existing dwelling. Govenek Wheal Rose Scorrier Redruth Cornwall TR16 5DA |
| PA23/05459 | 2024 | Refused | Application for a Lawful Development Certificate for a Proposed Use in relation to decision notice PA18/09272 dated 20.12.2018 for Construction of New Dwelli... Land At Crossroads Creegbrawse TR4 8NE |
| PA17/12236 | 2018 | Refused | Demolition and replacement of dwelling and annexe to provide 6 new residential properties Tides Reach Gannel Road Newquay TR7 2AG |
| PA16/10407 | 2017 | Refused | Siting of a park home as an annexe to the original dwelling 1 Mine View Winsor Lane Kelly Bray Callington Cornwall PL17 8HD |
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
- Two-storey rear extension 98%, 45 decided
- Wraparound extension 100%, 9 decided
- Side extension 98%, 57 decided
- Loft conversion and dormer 97%, 97 decided
- Rooflight 98%, 52 decided
- Porch 100%, 63 decided
- Garage conversion 94%, 47 decided
- Basement 100%, 11 decided
- Window and door 96%, 187 decided