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Most Common Planning Applications in Dartford

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Dartford is 26.3% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

4,451 real decisions·17 project types·Updated September 2026
93.0%
Safest: Conservatory
66.7%
Lowest: HMO
26.3%
Spread
17
Types ranked

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All 17 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory35733225
93.0%
2Hip-to-Gable Conversion13412410
92.5%
3Outbuilding52147051
90.2%
4Extension (General)25623026
89.8%
5Side Extension1,044926118
88.7%
6Wraparound Extension1039112
88.3%
7Rear Extension2,1461,887259
87.9%
8Dormer905790115
87.3%
9Garage / Parking1,9581,705253
87.1%
10Front Extension25421836
85.8%
11Annex1069115
85.8%
12Loft Conversion27223339
85.7%
13New Build754645109
85.5%
14Basement968214
85.4%
15Change of Use (Residential)474347127
73.2%
16Flat Conversion312110
67.7%
17HMO815427
66.7%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 93.0% approval rate. HMO? Just 66.7%.
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: 66.7% to 93.0%. 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

749 planning applications in Dartford 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 Dartford planning data

Nearby councils project type rankings

Methodology: Classifies 4,451 decisions in Dartford 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 Dartford Council's public planning portal, January 2020 to September 2026. Full methodology →
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