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Most Common Planning Applications in West Northamptonshire

Not all planning applications are created equal. The gap between the highest and lowest approval project type in West Northamptonshire is 5.5% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

152 real decisions·6 project types·Updated September 2026
96.8%
Safest: Outbuilding
91.3%
Lowest: Side Extension
5.5%
Spread
6
Types ranked

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All 6 project types ranked

#TypeDecisionsApprovedRefusedRate
1Outbuilding31301
96.8%
2Garage / Parking83803
96.4%
3Change of Use (Residential)25241
96.0%
4Rear Extension50482
96.0%
5Extension (General)26242
92.3%
6Side Extension23212
91.3%
See how this applies to your postcode →

These are council averages. Your property is specific.

A outbuilding application has a 96.8% approval rate. Side Extension? Just 91.3%.
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What the data tells us

1
The range is massive: 91.3% to 96.8%. 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

13 planning applications in West Northamptonshire 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 West Northamptonshire planning data

Methodology: Classifies 152 decisions in West Northamptonshire 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 West Northamptonshire Council's public planning portal, January 2020 to September 2026. Full methodology →
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