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Loft Conversion Approval Rates in Flintshire

Loft conversions change your roofline — and that makes them one of the more closely scrutinised application types. Councils scrutinise visibility, overlooking and street character more closely than for ground-level work. Here's what the data shows in Flintshire.

138 real decisions·January 2020 to present·Updated June 2026
84.8%
Approval Rate
138
Decisions
117
Approved
21
Refused
84.8% approved. But 21 refused since 2020. Each refusal cost the homeowner time and money on drawings and application fees. Understanding your local data before you apply is the difference between confidence and a costly gamble.

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Why loft conversion approval rates matter

Loft conversions face more scrutiny than rear or side extensions because they change the property's profile from the street. Dormers, mansards and hip-to-gable alterations are particularly sensitive.

These are council averages. Your property is specific.

Two houses on the same street can get different outcomes.
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How loft conversions compare to other project types

Not all applications are treated equally. Here's how loft conversions stack up against other common projects in Flintshire.

TypeDecisionsRate
Wraparound Extension86
95.3%
Conservatory307
95.1%
Side Extension644
94.7%
Rear Extension980
94.6%
Front Extension81
93.8%
Extension (General)2,100
91.0%
Garage / Parking1,319
87.0%
Flat Conversion30
86.7%
Loft Conversion138
84.8%
Outbuilding354
81.9%
Dormer162
81.5%
Annex86
81.4%
Change of Use (Residential)984
80.3%
New Build953
77.0%
HMO56
69.6%
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What the data tells us

1
84.8% of loft conversion applications in Flintshire get approved. That means 21 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
3
Council averages are starting points, not guarantees. The decisions that matter most are the comparable ones near your specific property — because planning officers look at precedent, character and the immediate context of your street.

Before you spend £5,000+ on architects and drawings

21 loft conversion 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 loft conversion data

Methodology: Based on 138 planning decisions classified as loft conversions in Flintshire, January 2020 to present. Classification uses keyword matching against proposal descriptions (matching generate_site_data.py rules). A single application may appear in multiple categories. Approval rate = approved / (approved + refused). Pending, withdrawn and invalid applications excluded. Data from Flintshire Council's public planning portal. Full methodology →
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