Outbuilding and garden room planning approval rate in Three Rivers
88% of 48 decided outbuilding and garden room applications in Three Rivers 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.
88%
Approval rate, all years, from 48 decided
48
decided outbuilding and garden room applications in Three Rivers: 42 approved, 6 refused
88%
Recent rate, decided since 2022, from 25 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 Withdrawn applications are excluded.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 2025. 0 of 48 decided records have no year recorded. Coverage may have gaps within the date range.
25 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 Three Rivers, or read about permitted development in Three Rivers. An approval rate does not decide which route your property qualifies for.
Example outbuilding and garden room decisions in Three Rivers
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 Three Rivers's planning register using the references below. Descriptions may be shortened; read the complete proposal and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/0680/FUL | 2025 | Approved | Variation of condition 2 (plan numbers) pursuant to planning permission 25/0049/FUL: To allow for repositioning of proposed outbuilding. Lantern House 9 Farm Road Chorleywood Rickmansworth Buckinghamshire WD3 5QA |
| 25/0687/RSP | 2025 | Approved | Retrospective: Extension to an existing outbuilding 103 Oaklands Avenue Oxhey Hall Watford Hertfordshire WD19 4TN |
| 25/0694/RSP | 2025 | Approved | Retrospective: Construction of outbuilding in rear garden for ancillary residential use 20 Marlin Square Abbots Langley Hertfordshire WD5 0EG |
| 25/0741/FUL | 2025 | Refused | Construction of outbuilding The Woodlands Penmans Green Sarratt Kings Langley Hertfordshire WD4 9AY |
| 24/0575/FUL | 2024 | Refused | Construction of outbuilding. Sanam Troutstream Way Loudwater Rickmansworth Hertfordshire WD3 4LA |
| 21/2687/CLED | 2022 | Refused | Certificate of Lawfulness Existing Development: Detached outbuilding Little Oaks Shire Lane Chorleywood WD3 5NT |
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 Three Rivers
- Single-storey rear extension 89%, 223 decided
- Two-storey rear extension 84%, 147 decided
- Wraparound extension 93%, 69 decided
- Side extension 87%, 95 decided
- Loft conversion and dormer 79%, 33 decided
- Rooflight 94%, 103 decided
- Porch 100%, 22 decided
- Garage conversion 100%, 27 decided
- Basement 50%, 18 decided
- Window and door 98%, 41 decided