Outbuilding approval rate in Brentwood

Brentwood approved 81.1% of outbuilding applications, based on 757 decisions analysed.

Last updated: August 2026

81.1%

outbuilding approval rate

757

Outbuilding decisions

614

Approved

143

Refused

84.0%

Brentwood overall

Outbuilding applications are refused more often than the Brentwood average (84.0%), suggesting the council scrutinises these projects more closely.

How outbuilding compares in Brentwood

Outbuilding (757 decided)

81.1%

Brentwood all applications (12,129 decided)

84.0%

Planning a outbuilding in Brentwood?

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Other project types in Brentwood

Rear Extension (3,885 decided)

84.2%

Garage / Parking (3,270 decided)

83.5%

Side Extension (2,220 decided)

82.4%

Dormer (1,447 decided)

74.2%

Front Extension (974 decided)

83.4%

Conservatory (756 decided)

86.4%

Loft Conversion (549 decided)

71.8%

Extension (General) (441 decided)

84.1%

Wraparound Extension (412 decided)

79.9%

Change of Use (Residential) (395 decided)

77.2%

New Build (332 decided)

77.1%

Hip-to-Gable Conversion (268 decided)

79.1%

Annex (200 decided)

82.0%

Basement (168 decided)

81.0%

Flat Conversion (43 decided)

67.4%

HMO (17 decided)

58.8%

← All Brentwood planning statistics

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