Side Extension approval rate in Islington

Islington approved 79.9% of side extension applications, based on 1,922 decisions analysed.

Last updated: March 2026

79.9%

side extension approval rate

1,922

Side Extension decisions

1,536

Approved

386

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 (1,922 decided)

79.9%

Islington all applications (85,229 decided)

82.8%

Planning a side extension in Islington?

79.9% get approved — but the odds vary by street. Your Pro Report 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

Get Islington Pro Report — £79

Less than one set of revised drawings.