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Loft Conversion Approval Rates in Elmbridge

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 Elmbridge.

4,279 real decisions·January 2020 to September 2026·Updated September 2026
76.6%
Approval Rate
4,279
Decisions
3,279
Approved
1,000
Refused
76.6% approved. But 1,000 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 Elmbridge.

TypeDecisionsRate
HMO62
90.3%
Conservatory5,281
88.6%
New Build242
87.2%
Front Extension4,806
83.8%
Rear Extension24,783
83.6%
Wraparound Extension1,362
83.0%
Side Extension15,985
82.8%
Extension (General)2,005
81.3%
Annex245
80.8%
Hip-to-Gable Conversion1,954
80.0%
Dormer10,646
77.7%
Outbuilding3,190
76.6%
Loft Conversion4,279
76.6%
Garage / Parking16,343
76.2%
Flat Conversion121
74.4%
Basement1,441
72.7%
Change of Use (Residential)1,905
71.5%
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What the data tells us

1
76.6% of loft conversion applications in Elmbridge get approved. That means 1,000 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

1,000 loft conversion applications in Elmbridge 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 Elmbridge planning data

Methodology: Based on 4,279 planning decisions classified as loft conversions in Elmbridge, January 2020 to September 2026. 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 Elmbridge Council's public planning portal. Full methodology →
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