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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.

105 real decisions·January 2020 to present·Updated March 2026
98.1%
Approval Rate
105
Decisions
103
Approved
2
Refused
98.1% approved. But 2 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 Conversion48
100.0%
Loft Conversion105
98.1%
Conservatory26
96.2%
Front Extension26
96.2%
Garage / Parking180
94.4%
Outbuilding84
94.0%
Dormer140
93.6%
Side Extension56
92.9%
Rear Extension440
92.5%
Extension (General)34
88.2%
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What the data tells us

1
98.1% of loft conversion applications in Three Rivers get approved. That means 2 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

2 loft conversion applications in Three Rivers 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 Three Rivers planning data

Methodology: Based on 105 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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