Data-backed planning intelligence · 3,770,000+ decisions analysed across England

Most Common Planning Applications in Derby

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Derby is 24.1% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

4,695 real decisions·13 project types·Updated August 2026
96.0%
Safest: Rear Extension
71.9%
Lowest: Annex
24.1%
Spread
13
Types ranked

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All 13 project types ranked

#TypeDecisionsApprovedRefusedRate
1Rear Extension1,6701,60367
96.0%
2Side Extension94789552
94.5%
3Wraparound Extension26625115
94.4%
4Garage / Parking56853137
93.5%
5Front Extension33730928
91.7%
6Extension (General)18817117
91.0%
7Outbuilding21118922
89.6%
8Conservatory55496
89.1%
9Change of Use (Residential)41937148
88.5%
10New Build20717928
86.5%
11HMO17515124
86.3%
12Dormer23519441
82.6%
13Annex32239
71.9%
See how this applies to your postcode →

These are council averages. Your property is specific.

A rear extension application has a 96.0% approval rate. Annex? Just 71.9%.
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What the data tells us

1
The range is massive: 71.9% to 96.0%. 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

340 planning applications in Derby 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 Derby planning data

Nearby councils project type rankings

Methodology: Classifies 4,695 decisions in Derby 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 Derby Council's public planning portal, January 2020 to March 2026. Full methodology →
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