Side extension planning approval rate in Merton
83% of 861 decided side extension 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.
83%
Approval rate, all years, from 861 decided
861
decided side extension applications in Merton: 718 approved, 143 refused
80%
Recent rate, decided since 2022, from 414 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 Withdrawn applications are excluded.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 1984 to 2026. 0 of 861 decided records have no year recorded. Coverage may have gaps within the date range.
414 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 Merton, or read about permitted development in Merton. An approval rate does not decide which route your property qualifies for.
Example side extension 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.
Search Merton's planning register using the references below. Descriptions may be shortened; read the complete proposal and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/P1812 | 2026 | Approved | DEMOLITION OF GARAGE AND ERECTION OF A TWO STOREY SIDE EXTENSION WITH NEW GARAGE AND SINGLE STOREY REAR EXTENSION, NEW DOUBLE FRONT ENTRANCE DOORS AND FIRST... |
| 25/P2328 | 2026 | Refused | APPLICATION FOR THE ERECTION OF A SINGLE STOREY SIDE EXTENSION. Flat 1 |
| 25/P3136 | 2026 | Approved | APPLICATION FOR THE ERECTION OF A SINGLE STOREY SIDE EXTENSION AND A SECOND FLOOR OUTRIGGER EXTENSION. |
| 25/P3227 | 2026 | Approved | ERECTION OF TWO STOREY SIDE EXTENSION WITH HIPPED ROOF, FIRST FLOOR REAR/SIDE EXTENSION AND SINGLE STOREY GROUND FLOOR REAR/SIDE EXTENSION |
| 24/P3206 | 2025 | Refused | ERECTION OF A SINGLE STOREY SIDE EXTENSION TO THE FRONT ELEVATION. |
| 25/P0248 | 2025 | Refused | ERECTION OF A HIP TO GABLE ROOF EXTENSION INCLUDING THE EXTENSION OVER A TWO-STOREY SIDE ADDITION ON THE WEST FLANK OF THE PROPERTY. ROOF LIGHTS ON FRONT RO... |
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
- Loft conversion and dormer 87%, 1,418 decided
- Rooflight 93%, 1,814 decided
- Outbuilding and garden room 82%, 413 decided
- Porch 89%, 128 decided
- Garage conversion 96%, 157 decided
- Basement 90%, 472 decided
- Window and door 94%, 456 decided