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Most Common Planning Applications in Bolton

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Bolton is 50.9% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

2,199 real decisions·14 project types·Updated September 2026
91.2%
Safest: Conservatory
40.3%
Lowest: HMO
50.9%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory18216616
91.2%
2Wraparound Extension44386
86.4%
3Rear Extension38032456
85.3%
4Garage / Parking44136774
83.2%
5Side Extension24820642
83.1%
6Extension (General)995810185
81.4%
7New Build28322657
79.9%
8Dormer17614036
79.5%
9Flat Conversion24195
79.2%
10Front Extension715516
77.5%
11Loft Conversion31238
74.2%
12Outbuilding674819
71.6%
13Change of Use (Residential)308206102
66.9%
14HMO722943
40.3%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 91.2% approval rate. HMO? Just 40.3%.
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What the data tells us

1
The range is massive: 40.3% to 91.2%. 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

431 planning applications in Bolton 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 Bolton planning data

Methodology: Classifies 2,199 decisions in Bolton 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 Bolton Council's public planning portal, January 2020 to September 2026. Full methodology →
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