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Loft Conversion Approval Rates in Calderdale

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 Calderdale.

158 real decisions·January 2020 to present·Updated March 2026
85.4%
Approval Rate
158
Decisions
135
Approved
23
Refused
85.4% approved. But 23 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 Calderdale.

TypeDecisionsRate
Conservatory378
93.4%
Basement114
92.1%
Rear Extension1,303
89.2%
Hip-to-Gable Conversion37
89.2%
Extension (General)1,859
89.0%
Side Extension1,193
88.7%
Wraparound Extension177
87.6%
Annex166
87.3%
Flat Conversion31
87.1%
Outbuilding482
86.9%
Loft Conversion158
85.4%
Front Extension143
84.6%
Garage / Parking1,559
83.3%
Change of Use (Residential)840
82.6%
Dormer811
81.5%
HMO41
75.6%
New Build150
74.7%
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What the data tells us

1
85.4% of loft conversion applications in Calderdale get approved. That means 23 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

23 loft conversion applications in Calderdale 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 Calderdale planning data

Nearby councils loft conversion data

Methodology: Based on 158 planning decisions classified as loft conversions in Calderdale, 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 Calderdale Council's public planning portal. Full methodology →
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