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Loft Conversion Approval Rates in Bromley

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 Bromley.

4,048 real decisions·January 2020 to present·Updated March 2026
79.6%
Approval Rate
4,048
Decisions
3,224
Approved
824
Refused
79.6% approved. But 824 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 Bromley.

TypeDecisionsRate
Conservatory1,305
84.3%
Rear Extension10,946
82.2%
Hip-to-Gable Conversion1,648
80.6%
Basement734
80.4%
Loft Conversion4,048
79.6%
Garage / Parking8,143
79.1%
Wraparound Extension1,270
79.1%
Dormer5,444
79.0%
Extension (General)1,451
78.4%
Side Extension5,503
78.1%
Front Extension1,575
77.5%
Outbuilding1,698
77.0%
Change of Use (Residential)1,732
74.4%
Flat Conversion255
74.1%
New Build1,744
73.0%
Annex224
62.1%
HMO174
58.0%
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What the data tells us

1
79.6% of loft conversion applications in Bromley get approved. That means 824 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

824 loft conversion applications in Bromley 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 Bromley planning data

Nearby councils loft conversion data

Methodology: Based on 4,048 planning decisions classified as loft conversions in Bromley, 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 Bromley Council's public planning portal. Full methodology →
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