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Most Common Planning Applications in Norwich

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Norwich is 43.2% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

4,697 real decisions·16 project types·Updated September 2026
98.3%
Safest: Conservatory
55.1%
Lowest: HMO
43.2%
Spread
16
Types ranked

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All 16 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory1751723
98.3%
2Wraparound Extension1111074
96.4%
3Dormer2292209
96.1%
4Rear Extension1,4571,39958
96.0%
5Side Extension60357825
95.9%
6Front Extension1951878
95.9%
7Loft Conversion1501437
95.3%
8Outbuilding24423014
94.3%
9Annex50464
92.0%
10Extension (General)35932534
90.5%
11Garage / Parking75667977
89.8%
12Basement64568
87.5%
13Change of Use (Residential)58751275
87.2%
14New Build1038122
78.6%
15Flat Conversion33249
72.7%
16HMO492722
55.1%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 98.3% approval rate. HMO? Just 55.1%.
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What the data tells us

1
The range is massive: 55.1% to 98.3%. 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

362 planning applications in Norwich 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 Norwich planning data

Nearby councils project type rankings

Methodology: Classifies 4,697 decisions in Norwich 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 Norwich Council's public planning portal, January 2020 to September 2026. Full methodology →
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