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Most Common Planning Applications in King's Lynn & West Norfolk

Not all planning applications are created equal. The gap between the highest and lowest approval project type in King's Lynn & West Norfolk is 19.1% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

2,655 real decisions·13 project types·Updated August 2026
100.0%
Safest: Conservatory
80.9%
Lowest: Change of Use (Residential)
19.1%
Spread
13
Types ranked

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All 13 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory63630
100.0%
2Dormer30300
100.0%
3Wraparound Extension25250
100.0%
4Side Extension1181162
98.3%
5Front Extension34331
97.1%
6Outbuilding1881826
96.8%
7Rear Extension2061997
96.6%
8Loft Conversion21201
95.2%
9Extension (General)45242824
94.7%
10Garage / Parking39235834
91.3%
11New Build1039310
90.3%
12Annex705812
82.9%
13Change of Use (Residential)18815236
80.9%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 100.0% approval rate. Change of Use (Residential)? Just 80.9%.
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What the data tells us

1
The range is massive: 80.9% 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

215 planning applications in King's Lynn & West Norfolk 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 King's Lynn & West Norfolk planning data

Nearby councils project type rankings

Methodology: Classifies 2,655 decisions in King's Lynn & West Norfolk 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 King's Lynn & West Norfolk Council's public planning portal, January 2020 to August 2026. Full methodology →
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