Side Extension approval rate in Islington

Islington approved 80.1% of side extension applications, based on 1,924 decisions analysed.

Last updated: August 2026

80.1%

side extension approval rate

1,924

Side Extension decisions

1,542

Approved

382

Refused

82.8%

Islington overall

Side Extension applications are refused more often than the Islington average (82.8%), suggesting the council scrutinises these projects more closely.

How side extension compares in Islington

Side Extension (1,924 decided)

80.1%

Islington all applications (85,214 decided)

82.8%

Planning a side extension in Islington?

80.1% 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 side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Free planning check for Islington →