Data-backed planning intelligence · 2,500,000+ decisions analysed across England

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 17.6% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

2,011 real decisions·11 project types·Updated March 2026
100.0%
Safest: Front Extension
82.4%
Lowest: Change of Use (Residential)
17.6%
Spread
11
Types ranked

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All 11 project types ranked

#TypeDecisionsApprovedRefusedRate
1Front Extension20200
100.0%
2Conservatory44440
100.0%
3Side Extension81810
100.0%
4Dormer23230
100.0%
5Outbuilding1451414
97.2%
6Rear Extension1491436
96.0%
7Extension (General)37635917
95.5%
8Garage / Parking29827424
91.9%
9New Build86788
90.7%
10Annex55478
85.5%
11Change of Use (Residential)12510322
82.4%
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 82.4%.
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: 82.4% 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

136 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 £79 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 2,011 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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