Annex approval rate in Barnet

Barnet approved 71.2% of annex applications, based on 205 decisions analysed.

Last updated: June 2026

71.2%

annex approval rate

205

Annex decisions

146

Approved

Refused

81.7%

Barnet overall

Annex applications are refused more often than the Barnet average (81.7%), suggesting the council scrutinises these projects more closely.

How annex compares in Barnet

Annex (205 decided)

71.2%

Barnet all applications (54,846 decided)

81.7%

Planning a annex in Barnet?

71.2% get approved, but the odds vary by street. Your Full Planning Analysis shows exactly what gets approved and refused near your property.

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

Free planning check for Barnet →

Other project types in Barnet

Rear Extension (17,627 decided)

75.8%

Garage / Parking (10,782 decided)

82.4%

Dormer (9,394 decided)

81.1%

Loft Conversion (8,299 decided)

80.8%

Side Extension (6,697 decided)

81.6%

Flat Conversion (4,214 decided)

76.2%

Hip-to-Gable Conversion (3,522 decided)

82.1%

Outbuilding (3,194 decided)

78.4%

Wraparound Extension (2,938 decided)

80.2%

Basement (2,613 decided)

83.2%

Change of Use (Residential) (2,026 decided)

69.1%

New Build (1,964 decided)

81.8%

Front Extension (1,813 decided)

78.9%

Conservatory (1,523 decided)

81.3%

Extension (General) (1,278 decided)

82.2%

HMO (619 decided)

43.9%

← All Barnet planning statistics

Check planning approval patterns, Free