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Loft Conversion Approval Rates in South Downs

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 South Downs.

149 real decisions·January 2020 to present·Updated March 2026
83.2%
Approval Rate
149
Decisions
124
Approved
25
Refused
83.2% approved. But 25 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.
Check your postcode to see what actually happens near your address.

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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 South Downs.

TypeDecisionsRate
Outbuilding889
95.1%
Conservatory355
94.6%
Basement65
93.8%
Extension (General)784
93.6%
Rear Extension939
93.3%
Front Extension107
92.5%
Side Extension530
92.1%
Garage / Parking1,448
90.6%
Annex195
88.7%
Dormer397
87.9%
Wraparound Extension70
87.1%
New Build234
85.0%
Loft Conversion149
83.2%
Change of Use (Residential)382
82.2%
Hip-to-Gable Conversion32
75.0%
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What the data tells us

1
83.2% of loft conversion applications in South Downs get approved. That means 25 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

25 loft conversion applications in South Downs 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 South Downs planning data

Nearby councils loft conversion data

Methodology: Based on 149 planning decisions classified as loft conversions in South Downs, 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 South Downs Council's public planning portal. Full methodology →
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