Side extension planning approval rate in Three Rivers
87% of 95 decided side extension 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.
87%
Approval rate, all years, from 95 decided
95
decided side extension applications in Three Rivers: 83 approved, 12 refused
85%
Recent rate, decided since 2022, from 33 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 Withdrawn applications are excluded.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 side extension 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.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 25/0081/FUL | 2025 | Approved | Demolition of existing conservatory; erection of a single storey rear extension and single storey side extension. 31 Frankland Close Croxley Green Rickmansworth Hertfordshire WD3 3AR |
| 25/0446/FUL | 2025 | Approved | Construction of single storey side extension 33 The Cloisters Rickmansworth Hertfordshire WD3 1HL |
| 25/0673/FUL | 2025 | Approved | Single storey side extension and provision of outdoor seating with wooden decking and internal alterations 7A Moneyhill Parade Uxbridge Road Rickmansworth Hertfordshire WD3 7BQ |
| 25/0724/FUL | 2025 | Refused | Single storey side extension Rusper Nottingham Road Heronsgate Rickmansworth Hertfordshire WD3 5DN |
| 24/0308/FUL | 2024 | Refused | Variation of Condition 2 (plan numbers) pursuant to planning permission 12/1199/FUL (Single storey and first floor front extensions, part single storey/two s... 99 Wolsey Road Moor Park Northwood Hertfordshire HA6 2ER |
| 23/0045/FUL | 2023 | Refused | Loft conversion including rear dormer window including Juliet Balcony, front rooflights; alterations to roof form of existing two storey side extension, erec... 106 Durrants Drive Croxley Green Hertfordshire WD3 3NS |
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
- Loft conversion and dormer 79%, 33 decided
- Rooflight 94%, 103 decided
- Outbuilding and garden room 88%, 48 decided
- Porch 100%, 22 decided
- Garage conversion 100%, 27 decided
- Basement 50%, 18 decided
- Window and door 98%, 41 decided