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Loft Conversion Approval Rates in Kingston

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 Kingston.

3,856 real decisions·January 2020 to present·Updated March 2026
74.8%
Approval Rate
3,856
Decisions
2,883
Approved
973
Refused
74.8% approved. But 973 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.

Loft Conversion approval rate by ward

#WardDecisionsApprovedRate
1Alexandra64
66.7%
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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 Kingston.

TypeDecisionsRate
Basement728
82.0%
Extension (General)806
81.0%
Wraparound Extension747
80.5%
Conservatory832
80.0%
Garage / Parking4,552
78.7%
New Build2,748
77.0%
Outbuilding1,141
76.8%
Side Extension3,340
76.5%
Annex135
76.3%
Hip-to-Gable Conversion1,720
76.2%
Change of Use (Residential)1,375
76.0%
Dormer3,695
75.6%
Rear Extension7,226
75.0%
Loft Conversion3,856
74.8%
Front Extension703
74.1%
HMO139
69.1%
Flat Conversion374
62.8%
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What the data tells us

1
74.8% of loft conversion applications in Kingston get approved. That means 973 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

973 loft conversion applications in Kingston 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 Kingston planning data

Nearby councils loft conversion data

Methodology: Based on 3,856 planning decisions classified as loft conversions in Kingston, 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 Kingston Council's public planning portal. Full methodology →
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