Data-backed planning intelligence · 3,290,000+ decisions analysed across England

Most Common Planning Applications in Flintshire

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Flintshire is 25.7% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

14,217 real decisions·15 project types·Updated June 2026
95.3%
Safest: Wraparound Extension
69.6%
Lowest: HMO
25.7%
Spread
15
Types ranked

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All 15 project types ranked

#TypeDecisionsApprovedRefusedRate
1Wraparound Extension86824
95.3%
2Conservatory30729215
95.1%
3Side Extension64461034
94.7%
4Rear Extension98092753
94.6%
5Front Extension81765
93.8%
6Extension (General)2,1001,912188
91.0%
7Garage / Parking1,3191,147172
87.0%
8Flat Conversion30264
86.7%
9Loft Conversion13811721
84.8%
10Outbuilding35429064
81.9%
11Dormer16213230
81.5%
12Annex867016
81.4%
13Change of Use (Residential)984790194
80.3%
14New Build953734219
77.0%
15HMO563917
69.6%
See how this applies to your postcode →

These are council averages. Your property is specific.

A wraparound extension application has a 95.3% approval rate. HMO? Just 69.6%.
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: 69.6% to 95.3%. 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

1,752 planning applications in Flintshire 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 Flintshire planning data

Nearby councils project type rankings

Methodology: Classifies 14,217 decisions in Flintshire 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 Flintshire Council's public planning portal, January 2020 to present. Full methodology →
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