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Most Common Planning Applications in Dacorum

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Dacorum is 0.8% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

1,135 real decisions·7 project types·Updated May 2026
100.0%
Safest: Loft Conversion
99.2%
Lowest: Rear Extension
0.8%
Spread
7
Types ranked

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All 7 project types ranked

#TypeDecisionsApprovedRefusedRate
1Loft Conversion59590
100.0%
2Dormer63630
100.0%
3Outbuilding31310
100.0%
4Garage / Parking1191190
100.0%
5Side Extension36360
100.0%
6Front Extension25250
100.0%
7Rear Extension1291281
99.2%
See how this applies to your postcode →

These are council averages. Your property is specific.

A loft conversion application has a 100.0% approval rate. Rear Extension? Just 99.2%.
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What the data tells us

1
The range is massive: 99.2% to 100.0%. 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 planning applications in Dacorum 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 Dacorum planning data

Methodology: Classifies 1,135 decisions in Dacorum 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 Dacorum Council's public planning portal, January 2020 to present. Full methodology →
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