Wrap-around extension in Islington

Where in Islington does a wrap around extension actually get determined?

Every Islington postcode district we draw in, the stock that dominates it and the authority that validates a wrap around extension there. Islington fees below are the statutory England rates for 2026, not wrap around extension estimates.

What changes about a wrap around extension in each part of Islington?

Roof pitch, wall build-up and plot depth change every few Islington streets, and each one changes what a wrap around extension can achieve at that address.

• Newington Green (N16) — a wrap around extension in Newington Green starts from georgian and victorian terraces, and Newington Green reads as Georgian fragments, Victorian terraces. Georgian rear elevations here are usually the listed or locally listed face of the building in N16. Islington Council assesses Newington Green wrap around extensions against its own Newington Green character guidance, and the location plan we draw for Newington Green references Newington Green.
• Angel (N1, EC1V) — Georgian terraces, dense town centre defines Angel, where georgian and early victorian terraces set what a wrap around extension can do. Georgian rear elevations here are usually the listed or locally listed face of the building across N1. Any Angel wrap around extension is validated by Islington Council, with Angel station the usual Angel reference point on the site plan.
• Barnsbury (N1) — a wrap around extension in Barnsbury starts from georgian and early victorian terraces, and Barnsbury reads as Georgian conservation area. Georgian rear elevations here are usually the listed or locally listed face of the building in N1. Islington Council assesses Barnsbury wrap around extensions against its own Barnsbury character guidance, and the location plan we draw for Barnsbury references Barnsbury Square.
• Canonbury (N1) — a wrap around extension in Canonbury starts from georgian villas, victorian terraces, and Canonbury reads as Georgian and Victorian conservation area. Georgian rear elevations here are usually the listed or locally listed face of the building in N1. Islington Council assesses Canonbury wrap around extensions against its own Canonbury character guidance, and the location plan we draw for Canonbury references Canonbury Square.
• Highbury (N5) — Victorian terraces around Highbury Fields defines Highbury, where victorian terraces, mansion blocks set what a wrap around extension can do. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage across N5. Any Highbury wrap around extension is validated by Islington Council, with Highbury Fields the usual Highbury reference point on the site plan.
• Clerkenwell (EC1) — a wrap around extension in Clerkenwell starts from warehouse conversions, georgian fragments, and Clerkenwell reads as converted industrial buildings, creative offices. Georgian rear elevations here are usually the listed or locally listed face of the building in EC1. Islington Council assesses Clerkenwell wrap around extensions against its own Clerkenwell character guidance, and the location plan we draw for Clerkenwell references Exmouth Market.
• Finsbury Park (N4) — wrap around extension work in Finsbury Park means victorian terraces, post-war estates. Finsbury Park is Victorian terraces, mixed. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout N4. Islington Council decides the Finsbury Park application, and Finsbury Park anchors the Finsbury Park location plan.

What local planning policy applies to a wrap around extension in Islington?

Conservation areas covering Islington: Islington Council runs 40, and Canonbury, Highbury, Clerkenwell are the ones Islington owners meet most. A wrap around extension inside a Islington conservation area loses permitted development, so the Islington submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Highbury a wrap around extension is judged on the street elevation first.

Article 4 and your Islington wrap around extension: Article 4 Direction covering the whole borough removes permitted development rights for HMO conversions (C3 to C4). Separate Article 4 for office-to-residential in key areas. At a N1 address that matters twice over, because Islington Council applies the direction unevenly across Islington — we read the Islington policies map for the exact N1 address before quoting wrap around extensions.

The building fabric around Islington: Georgian and early Victorian terraces, Victorian bye-law housing, 1930s mansion blocks, converted industrial buildings in Clerkenwell and Farringdon. Densely terraced, gentrified; strong conservation area coverage; active planning department. A wrap around extension in Islington is scoped against that stock first.

Which neighbouring authorities border Islington?

• Camden — adjoining Islington, with 40 conservation areas centred on NW1. A wrap around extension on the far side of the Islington line is determined by Camden Council, so the Islington quote for wrap around extensions is checked against Camden guidance before it is issued.
• Hackney — adjoining Islington, with 29 conservation areas centred on E2. A wrap around extension on the far side of the Islington line is determined by Hackney Council, so the Islington quote for wrap around extensions is checked against Hackney guidance before it is issued.
• Haringey — the Haringey boundary runs against Islington, so a wrap around extension a street from Islington is decided by Haringey Council instead. Haringey runs 29 conservation areas across N4 and its neighbours, which is why wrap around extensions priced for Islington are re-checked against Haringey policy whenever the Islington address sits on that edge.
• City of London — cross the Islington boundary and City of London Corporation takes the wrap around extension instead, applying 27 conservation areas of its own around EC1. We re-price wrap around extensions at the Islington edge because City of London policy and Islington policy rarely align on wrap around extension depth.

Sources for this Islington wrap around extension page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.