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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 25.9% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

3,521 real decisions·14 project types·Updated March 2026
95.9%
Safest: Rear Extension
70.0%
Lowest: Hip-to-Gable Conversion
25.9%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Rear Extension1,7141,64470
95.9%
2Side Extension98793255
94.4%
3Wraparound Extension27425816
94.2%
4Garage / Parking59055238
93.6%
5Front Extension34531728
91.9%
6Extension (General)19717918
90.9%
7Outbuilding22520124
89.3%
8Conservatory56506
89.3%
9Change of Use (Residential)43738651
88.3%
10New Build21318528
86.9%
11HMO18916326
86.2%
12Dormer24220042
82.6%
13Annex34259
73.5%
14Hip-to-Gable Conversion20146
70.0%
See how this applies to your postcode →

These are council averages. Your property is specific.

A rear extension application has a 95.9% approval rate. Hip-to-Gable Conversion? Just 70.0%.
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What the data tells us

1
The range is massive: 70.0% to 95.9%. 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

255 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 3,521 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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