Outbuilding approval rate in Bromley

Bromley approved 77.0% of outbuilding applications, based on 1,698 decisions analysed.

Last updated: March 2026

77.0%

outbuilding approval rate

1,698

Outbuilding decisions

1,307

Approved

391

Refused

80.9%

Bromley overall

Outbuilding applications are refused more often than the Bromley average (80.9%), suggesting the council scrutinises these projects more closely.

How outbuilding compares in Bromley

Outbuilding (1,698 decided)

77.0%

Bromley all applications (36,212 decided)

80.9%

Planning a outbuilding in Bromley?

77.0% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.

✓ Your ward's outbuilding approval rate
✓ Nearest comparable outbuilding decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Get Bromley Pro Report — £79

Less than one set of revised drawings.

Other project types in Bromley

Rear Extension (10,946 decided)

82.2%

Garage / Parking (8,143 decided)

79.1%

Side Extension (5,503 decided)

78.1%

Dormer (5,444 decided)

79.0%

Loft Conversion (4,048 decided)

79.6%

New Build (1,744 decided)

73.0%

Change of Use (Residential) (1,732 decided)

74.4%

Hip-to-Gable Conversion (1,648 decided)

80.6%

Front Extension (1,575 decided)

77.5%

Extension (General) (1,451 decided)

78.4%

Conservatory (1,305 decided)

84.3%

Wraparound Extension (1,270 decided)

79.1%

Basement (734 decided)

80.4%

Flat Conversion (255 decided)

74.1%

Annex (224 decided)

62.1%

HMO (174 decided)

58.0%

← All Bromley planning statistics

Check planning approval patterns — Free