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Most Common Planning Applications in North Northamptonshire

Not all planning applications are created equal. The gap between the highest and lowest approval project type in North Northamptonshire is 12.1% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

4,914 real decisions·13 project types·Updated June 2026
96.3%
Safest: Conservatory
84.2%
Lowest: Annex
12.1%
Spread
13
Types ranked

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All 13 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory1361315
96.3%
2Extension (General)30829216
94.8%
3Rear Extension63059436
94.3%
4Front Extension99936
93.9%
5Side Extension36333132
91.2%
6Outbuilding16715215
91.0%
7Garage / Parking58853454
90.8%
8Wraparound Extension47425
89.4%
9Change of Use (Residential)14813018
87.8%
10Loft Conversion45396
86.7%
11New Build877512
86.2%
12Dormer937914
84.9%
13Annex38326
84.2%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 96.3% approval rate. Annex? Just 84.2%.
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What the data tells us

1
The range is massive: 84.2% to 96.3%. 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

298 planning applications in North 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 North Northamptonshire planning data

Methodology: Classifies 4,914 decisions in North 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 North Northamptonshire Council's public planning portal, January 2020 to present. Full methodology →
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