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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 19.6% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

2,312 real decisions·12 project types·Updated June 2026
100.0%
Safest: Front Extension
80.4%
Lowest: Change of Use (Residential)
19.6%
Spread
12
Types ranked

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All 12 project types ranked

#TypeDecisionsApprovedRefusedRate
1Front Extension25250
100.0%
2Conservatory51510
100.0%
3Dormer25250
100.0%
4Wraparound Extension22220
100.0%
5Side Extension97961
99.0%
6Rear Extension1761706
96.6%
7Outbuilding1631576
96.3%
8Extension (General)40338320
95.0%
9Garage / Parking34231626
92.4%
10New Build988810
89.8%
11Annex635310
84.1%
12Change of Use (Residential)15312330
80.4%
See how this applies to your postcode →

These are council averages. Your property is specific.

A front extension application has a 100.0% approval rate. Change of Use (Residential)? Just 80.4%.
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What the data tells us

1
The range is massive: 80.4% 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

174 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 2,312 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 present. Full methodology →
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