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Loft Conversion Approval Rates in Plymouth

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 Plymouth.

172 real decisions·January 2020 to present·Updated March 2026
97.7%
Approval Rate
172
Decisions
168
Approved
4
Refused
97.7% approved. But 4 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 Plymouth.

TypeDecisionsRate
Wraparound Extension85
98.8%
Loft Conversion172
97.7%
Rear Extension1,196
97.3%
Flat Conversion35
97.1%
Side Extension597
96.6%
Hip-to-Gable Conversion115
96.5%
Basement72
95.8%
Dormer361
95.6%
Extension (General)273
94.1%
Front Extension150
93.3%
Conservatory160
93.1%
Outbuilding187
93.0%
HMO272
92.6%
Annex81
91.4%
Garage / Parking776
89.4%
Change of Use (Residential)429
86.5%
New Build104
78.8%
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What the data tells us

1
97.7% of loft conversion applications in Plymouth get approved. That means 4 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

4 loft conversion applications in Plymouth 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 Plymouth planning data

Nearby councils loft conversion data

Methodology: Based on 172 planning decisions classified as loft conversions in Plymouth, 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 Plymouth Council's public planning portal. Full methodology →
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