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Most Common Planning Applications in Three Rivers

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Three Rivers is 15.4% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

3,627 real decisions·13 project types·Updated June 2026
100.0%
Safest: Hip-to-Gable Conversion
84.6%
Lowest: Basement
15.4%
Spread
13
Types ranked

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All 13 project types ranked

#TypeDecisionsApprovedRefusedRate
1Hip-to-Gable Conversion63630
100.0%
2Conservatory60582
96.7%
3Wraparound Extension68653
95.6%
4Loft Conversion18016911
93.9%
5Side Extension15814810
93.7%
6Front Extension76715
93.4%
7Outbuilding14913811
92.6%
8Rear Extension62257547
92.4%
9Garage / Parking32329726
92.0%
10Dormer22520322
90.2%
11Extension (General)42375
88.1%
12New Build22193
86.4%
13Basement26224
84.6%
See how this applies to your postcode →

These are council averages. Your property is specific.

A hip-to-gable conversion application has a 100.0% approval rate. Basement? Just 84.6%.
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What the data tells us

1
The range is massive: 84.6% to 100.0%. Choosing the right project type — or framing your application correctly — can dramatically affect outcomes.
2
Visibility drives scrutiny. Project types that change the external appearance — dormers, loft conversions, hip-to-gable — face more resistance than those that don't. The more visible your proposal, the more carefully it needs designing.
3
These are council-wide averages. Your ward, your street and your immediate neighbours all shift the odds. The comparable decisions near your property are the best indicator of outcome.

Before you spend £5,000+ on architects and drawings

272 planning applications in Three Rivers have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A free, property-specific report shows you what gets approved — and what gets refused — near your property.

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More Three Rivers planning data

Methodology: Classifies 3,627 decisions in Three Rivers into residential project types using keyword matching against proposal descriptions (matching generate_site_data.py subtype rules). A single application may appear in multiple categories. Data from Three Rivers Council's public planning portal, January 2020 to present. Full methodology →
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