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

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 14.3% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

4,238 real decisions·13 project types·Updated March 2026
98.4%
Safest: Conservatory
84.1%
Lowest: Dormer
14.3%
Spread
13
Types ranked

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All 13 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory1241222
98.4%
2Rear Extension54251725
95.4%
3Extension (General)27426014
94.9%
4Front Extension86815
94.2%
5Side Extension30828523
92.5%
6Garage / Parking48144041
91.5%
7Loft Conversion33303
90.9%
8Wraparound Extension44404
90.9%
9Outbuilding12911712
90.7%
10Change of Use (Residential)1119912
89.2%
11Annex24213
87.5%
12New Build716011
84.5%
13Dormer695811
84.1%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 98.4% approval rate. Dormer? Just 84.1%.
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What the data tells us

1
The range is massive: 84.1% to 98.4%. 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

230 planning applications in North Northamptonshire 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 North Northamptonshire planning data

Methodology: Classifies 4,238 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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