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Most Common Planning Applications in Winchester

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Winchester is 18.1% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

4,162 real decisions·16 project types·Updated September 2026
98.1%
Safest: Conservatory
80.0%
Lowest: HMO
18.1%
Spread
16
Types ranked

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All 16 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory2622575
98.1%
2Side Extension58256616
97.3%
3Rear Extension1,00798027
97.3%
4Hip-to-Gable Conversion34331
97.1%
5Wraparound Extension92893
96.7%
6Front Extension1471425
96.6%
7Dormer36735215
95.9%
8Extension (General)51148724
95.3%
9Loft Conversion25123912
95.2%
10Garage / Parking1,1251,06461
94.6%
11Basement48453
93.8%
12Annex100937
93.0%
13Outbuilding40837929
92.9%
14Change of Use (Residential)27123635
87.1%
15New Build17214230
82.6%
16HMO20164
80.0%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 98.1% approval rate. HMO? Just 80.0%.
Check your postcode to see what actually happens near your address.

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What the data tells us

1
The range is massive: 80.0% 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

252 planning applications in Winchester 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 Winchester planning data

Nearby councils project type rankings

Methodology: Classifies 4,162 decisions in Winchester 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 Winchester Council's public planning portal, January 2020 to September 2026. Full methodology →
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