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

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 46.0% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

8,179 real decisions·16 project types·Updated March 2026
98.2%
Safest: Conservatory
52.2%
Lowest: HMO
46.0%
Spread
16
Types ranked

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All 16 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory1671643
98.2%
2Wraparound Extension1081044
96.3%
3Rear Extension1,3971,33958
95.8%
4Dormer2142059
95.8%
5Side Extension57955425
95.7%
6Front Extension1871798
95.7%
7Loft Conversion1371307
94.9%
8Outbuilding22921514
93.9%
9Annex48444
91.7%
10Extension (General)33830434
89.9%
11Garage / Parking70863474
89.5%
12Basement63558
87.3%
13Change of Use (Residential)54547372
86.8%
14New Build987622
77.6%
15Flat Conversion32239
71.9%
16HMO462422
52.2%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 98.2% approval rate. HMO? Just 52.2%.
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What the data tells us

1
The range is massive: 52.2% to 98.2%. 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

605 planning applications in Norwich 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 Norwich planning data

Nearby councils project type rankings

Methodology: Classifies 8,179 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 present. Full methodology →
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