Outbuilding and garden room planning approval rate in Greater Cambridge
92% of 37 decided outbuilding and garden room applications in Greater Cambridge 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.
92%
Approval rate, all years, from 37 decided
37
decided outbuilding and garden room applications in Greater Cambridge: 34 approved, 3 refused
100%
Recent rate, decided since 2022, from 15 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 Withdrawn applications are excluded.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 37 decided records have no year recorded. Coverage may have gaps within the date range.
15 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 Greater Cambridge, or read about permitted development in Greater Cambridge. An approval rate does not decide which route your property qualifies for.
Example outbuilding and garden room decisions in Greater Cambridge
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.
Search Greater Cambridge's planning register using the references below. Descriptions may be shortened; read the complete proposal and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 26/00122/S73 | 2026 | Approved | S73 to vary conditions 2 (approved drawings) and 3 (materials) of ref: 25/01335/HFUL (Demolition and replacement of existing garden room to the rear of dwell... 40 Montague Road Cambridge Cambridgeshire CB4 1BX |
| 25/03309/HFUL | 2025 | Approved | Demolition of existing garden room and erection of new garden room to the rear. 7 Rathmore Road Cambridge Cambridgeshire CB1 7AB |
| 25/03317/CL2PD | 2025 | Approved | Certificate of lawfulness under S192 to convert an existing detached garage into a summer garden room. 68 High Street Great Wilbraham Cambridgeshire CB21 5JD |
| 21/00249/HFUL | 2021 | Refused | Single storey annex to provide a home office (Re-submission of 20/03526/HFUL). The Mayfair London Road Six Mile Bottom Little Wilbraham CB8 0UJ |
| 20/02914/HFUL | 2020 | Refused | Retrospective demolition of asbestos garage and erection of garden room/studio on existing concrete slab and footings 3 Ley Grove Cottages Whittlesford Road Little Shelford Cambridge Cambridgeshire CB22 5EX |
| S/2420/19/LD | 2019 | Refused | Certificate of lawful development for the existing ancillary use of the annexe. 11 Princess Drive Sawston Cambridge Cambridgeshire CB22 3DL |
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 Greater Cambridge
- Single-storey rear extension 94%, 155 decided
- Two-storey rear extension 86%, 81 decided
- Wraparound extension 100%, 28 decided
- Side extension 96%, 72 decided
- Loft conversion and dormer 87%, 23 decided
- Rooflight 94%, 33 decided
- Porch 100%, 11 decided
- Garage conversion 94%, 17 decided
- Basement 100%, 10 decided
- Window and door 91%, 57 decided