Outbuilding and garden room planning approval rate in Merton
82% of 413 decided outbuilding and garden room applications in Merton 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.
82%
Approval rate, all years, from 413 decided
413
decided outbuilding and garden room applications in Merton: 337 approved, 76 refused
77%
Recent rate, decided since 2022, from 198 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 Withdrawn applications are excluded.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 Merton
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 |
|---|---|---|---|
| 25/P3170 | 2026 | Approved | DEMOLITION OF EXISTING GARAGE OUTBUILDING AND ERECTION OF A SINGLE STOREY OUTBUILDING, FOR USE AS A GRANNY ANNEXE, ANCILLARY TO THE MAIN DWELLINGHOUSE. |
| 25/P3458 | 2026 | Approved | REMOVAL OF SHED AND ERECTION OF NEW OUTBUILDING AND OUTDOOR STORAGE AT THE END OF THE REAR GARDEN. |
| 26/P0078 | 2026 | Refused | APPLICATION FOR A LAWFUL DEVELOPMENT CERTIFICATE IN RESPECT OF THE PROPOSED DEMOLITION OF THE EXISTING OUTBUILDING AND THE CONSTRUCTION OF A NEW OUTBUILDING... |
| 24/P0916 | 2025 | Approved | APPLICATION FOR RETENTION OF ERECTION OF OUTBUILDING FOR USE ANCILLARY TO THE MAIN DWELLINGHOUSE INCLUDING COOKING AND SLEEPING ACCOMMODATION |
| 24/P1926 | 2025 | Refused | OUTLINE PLANNING PERMISSION WITH LANDCAPING, APPEARANCE AND LAYOUT RESERVED FOR THE DEMOLITION OF THE EXISTING BUILDINGS AND OUTBUILDINGS. CONSTRUCTION OF NE... |
| 24/P3197 | 2025 | Refused | CONSTRUCTION OF GARAGE WITH GARDEN ROOM AND WORKSHOP. |
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 Merton
- Single-storey rear extension 81%, 4,141 decided
- Two-storey rear extension 77%, 872 decided
- Wraparound extension 91%, 758 decided
- Side extension 83%, 861 decided
- Loft conversion and dormer 87%, 1,418 decided
- Rooflight 93%, 1,814 decided
- Porch 89%, 128 decided
- Garage conversion 96%, 157 decided
- Basement 90%, 472 decided
- Window and door 94%, 456 decided