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Loft Conversion Approval Rates in Three Rivers

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 Three Rivers.

180 real decisions·January 2020 to present·Updated June 2026
93.9%
Approval Rate
180
Decisions
169
Approved
11
Refused
93.9% approved. But 11 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 Three Rivers.

TypeDecisionsRate
Hip-to-Gable Conversion63
100.0%
Conservatory60
96.7%
Wraparound Extension68
95.6%
Loft Conversion180
93.9%
Side Extension158
93.7%
Front Extension76
93.4%
Outbuilding149
92.6%
Rear Extension622
92.4%
Garage / Parking323
92.0%
Dormer225
90.2%
Extension (General)42
88.1%
New Build22
86.4%
Basement26
84.6%
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What the data tells us

1
93.9% of loft conversion applications in Three Rivers get approved. That means 11 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

11 loft conversion applications in Three Rivers 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 Three Rivers planning data

Methodology: Based on 180 planning decisions classified as loft conversions in Three Rivers, 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 Three Rivers Council's public planning portal. Full methodology →
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