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Most Common Planning Applications in Middlesbrough

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Middlesbrough is 28.4% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

3,412 real decisions·13 project types·Updated March 2026
87.7%
Safest: Conservatory
59.3%
Lowest: Dormer
28.4%
Spread
13
Types ranked

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All 13 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory817110
87.7%
2Outbuilding746212
83.8%
3Extension (General)1,155941214
81.5%
4Garage / Parking48439094
80.6%
5Rear Extension16813335
79.2%
6Side Extension1098227
75.2%
7Flat Conversion36279
75.0%
8Change of Use (Residential)26019268
73.8%
9New Build1379938
72.3%
10HMO855926
69.4%
11Annex26188
69.2%
12Front Extension25178
68.0%
13Dormer1408357
59.3%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 87.7% approval rate. Dormer? Just 59.3%.
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What the data tells us

1
The range is massive: 59.3% to 87.7%. 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

576 planning applications in Middlesbrough 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 Middlesbrough planning data

Nearby councils project type rankings

Methodology: Classifies 3,412 decisions in Middlesbrough 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 Middlesbrough Council's public planning portal, January 2020 to present. Full methodology →
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