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

Most Common Planning Applications in Buckinghamshire

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Buckinghamshire is 20.6% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

25,538 real decisions·17 project types·Updated March 2026
89.9%
Safest: Conservatory
69.3%
Lowest: HMO
20.6%
Spread
17
Types ranked

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All 17 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory98488599
89.9%
2Wraparound Extension78469985
89.2%
3Front Extension2,3382,080258
89.0%
4Basement26423331
88.3%
5Side Extension4,5484,011537
88.2%
6Rear Extension8,0657,068997
87.6%
7Hip-to-Gable Conversion45838870
84.7%
8Dormer2,7562,327429
84.4%
9Loft Conversion1,7281,452276
84.0%
10Garage / Parking5,9955,016979
83.7%
11Extension (General)947786161
83.0%
12Annex25320944
82.6%
13Outbuilding1,9201,574346
82.0%
14Flat Conversion14611630
79.5%
15New Build1,3521,039313
76.8%
16Change of Use (Residential)1,090829261
76.1%
17HMO886127
69.3%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 89.9% approval rate. HMO? Just 69.3%.
Check your postcode to see what actually happens near your address.

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What the data tells us

1
The range is massive: 69.3% to 89.9%. 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

3,754 planning applications in Buckinghamshire 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 Buckinghamshire planning data

Nearby councils project type rankings

Methodology: Classifies 25,538 decisions in Buckinghamshire 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 Buckinghamshire Council's public planning portal, January 2020 to present. Full methodology →
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