Outbuilding approval rate in Cornwall

Cornwall approved 94.5% of outbuilding applications, based on 1,443 decisions analysed.

Last updated: August 2026

94.5%

outbuilding approval rate

1,443

Outbuilding decisions

1,363

Approved

Refused

93.0%

Cornwall overall

Outbuilding applications are approved at roughly the same rate as the Cornwall average (93.0%).

How outbuilding compares in Cornwall

Outbuilding (1,443 decided)

94.5%

Cornwall all applications (24,970 decided)

93.0%

Planning a outbuilding in Cornwall?

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Other project types in Cornwall

Extension (General) (4,090 decided)

95.9%

Garage / Parking (3,783 decided)

93.9%

Change of Use (Residential) (1,700 decided)

92.4%

Rear Extension (1,191 decided)

97.1%

New Build (969 decided)

82.9%

Annex (814 decided)

95.3%

Dormer (656 decided)

96.3%

Side Extension (643 decided)

98.0%

Conservatory (594 decided)

97.5%

Loft Conversion (441 decided)

93.0%

Front Extension (126 decided)

93.7%

Basement (120 decided)

97.5%

Wraparound Extension (69 decided)

98.6%

HMO (62 decided)

93.5%

Flat Conversion (62 decided)

93.5%

Hip-to-Gable Conversion (16 decided)

81.2%

← All Cornwall planning statistics

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