Data-backed planning intelligence · 3,780,000+ decisions analysed across England

Most Common Planning Applications in Test Valley

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Test Valley is 17.3% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

6,063 real decisions·14 project types·Updated August 2026
98.1%
Safest: Wraparound Extension
80.8%
Lowest: New Build
17.3%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Wraparound Extension53521
98.1%
2Conservatory28027010
96.4%
3Side Extension42540520
95.3%
4Front Extension1241186
95.2%
5Rear Extension76672442
94.5%
6Loft Conversion64595
92.2%
7Dormer17315914
91.9%
8Extension (General)35932930
91.6%
9Outbuilding37734433
91.2%
10Garage / Parking96987990
90.7%
11Annex1039112
88.3%
12Basement23203
87.0%
13Change of Use (Residential)23919544
81.6%
14New Build26621551
80.8%
See how this applies to your postcode →

These are council averages. Your property is specific.

A wraparound extension application has a 98.1% approval rate. New Build? Just 80.8%.
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What the data tells us

1
The range is massive: 80.8% to 98.1%. 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

522 planning applications in Test Valley 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 Test Valley planning data

Nearby councils project type rankings

Methodology: Classifies 6,063 decisions in Test Valley 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 Test Valley Council's public planning portal, January 2020 to August 2026. Full methodology →
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