London Borough of Sutton

Adopted Documents We Assess Against

Development plan: Sutton Local Plan 2016-2031 (adopted 26 February 2018)

Documents are re-checked against the council's own website weekly. A detected change flags "Policy Update Available" for human review — live assessment standards are never replaced automatically.

London Borough of Sutton standards at a glance

5 numeric standards taken from London Borough of Sutton's own adopted documents, each shown with the paragraph it comes from. Figures differ between councils — these are this one's.

Rear extension depth

up to 2.7m

On a Sutton terrace the guide is 2.7 metres deep with a 2.5 metre eaves height - tighter than most neighbouring boroughs. The guide is from 2006, so it is worth checking with the case officer whether it is still being applied as written. Design of Residential Extensions A.1.3

up to 3.5m

On a Sutton semi the guide is about 3 metres, with 3.5 metres the most they will normally accept. Keep the eaves at 2.5 metres where it runs along the boundary. Design of Residential Extensions A.1.3

up to 3.5m

On a Sutton detached house the guide is up to 3.5 metres deep. Design of Residential Extensions A.1.3

Side extension form

at least 1m

Sutton want a metre kept clear to the boundary, the side extension no more than a third to a half of the width of the house, and the front face set back 225mm so it reads as an addition. Design of Residential Extensions A.1.2

Amenity neighbouring

at least 20m

Sutton look for around 20 metres between windows that face each other. In more spacious parts of the borough they may expect more than that. Design of Residential Extensions 3.3.2

Standards are what the council normally expects, not a guarantee. A scheme outside them can still be approved on its merits, and one inside them can still be refused for another reason.

Authored Policy Library

7 local policy checks, each citation-locked to the adopted document. National policy (NPPF, national space and daylight standards) applies alongside these.

Sutton Local Plan 2016-2031

• Sutton Local Plan 2016-2031 (design and character policies) — Design character (provisional citation) Sutton will judge how well your extension fits the host house and street. Their Design of Residential Extensions guide explains what they expect - worth reading before you finalise the drawings.
• Sutton Local Plan 2016-2031 (residential amenity policies) — Amenity neighbouring (provisional citation) Sutton will look at the effect on your neighbours' light, outlook and privacy. Show the relationship to their windows on your drawings.

Sutton Design of Residential Extensions (2006)

• Design of Residential Extensions A.1.3 — Rear extension depth (3 checks) On a Sutton terrace the guide is 2.7 metres deep with a 2.5 metre eaves height - tighter than most neighbouring boroughs. The guide is from 2006, so it is worth checking with the case officer whether it is still being applied as written. On a Sutton semi the guide is about 3 metres, with 3.5 metres the most they will normally accept. Keep the eaves at 2.5 metres where it runs along the boundary. On a Sutton detached house the guide is up to 3.5 metres deep.
• Design of Residential Extensions A.1.2 — Side extension form Sutton want a metre kept clear to the boundary, the side extension no more than a third to a half of the width of the house, and the front face set back 225mm so it reads as an addition.
• Design of Residential Extensions 3.3.2 — Amenity neighbouring Sutton look for around 20 metres between windows that face each other. In more spacious parts of the borough they may expect more than that.