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Loft Conversion Approval Rates in Guildford

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 Guildford.

802 real decisions·January 2020 to September 2026·Updated September 2026
76.2%
Approval Rate
802
Decisions
611
Approved
191
Refused
76.2% approved. But 191 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 Guildford.

TypeDecisionsRate
Conservatory823
85.4%
Wraparound Extension458
82.5%
Rear Extension4,049
81.9%
Side Extension2,323
80.8%
Basement156
80.8%
Front Extension673
80.1%
Outbuilding1,369
79.5%
Hip-to-Gable Conversion339
79.4%
Garage / Parking3,267
79.1%
Extension (General)785
78.9%
Dormer1,560
76.6%
Loft Conversion802
76.2%
Annex127
74.0%
Flat Conversion44
72.7%
Change of Use (Residential)490
71.4%
New Build768
70.2%
HMO72
55.6%
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What the data tells us

1
76.2% of loft conversion applications in Guildford get approved. That means 191 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

191 loft conversion applications in Guildford 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 Guildford planning data

Nearby councils loft conversion data

Methodology: Based on 802 planning decisions classified as loft conversions in Guildford, 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 Guildford Council's public planning portal. Full methodology →
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