House Extension Cost in Shoreditch: 2026 Price Guide

Beyond the kitchen-focused rear extension, many homeowners in Shoreditch look at side-return infills or full double-storey extensions to add real square footage without moving house - particularly on the terraced streets where a side return is otherwise wasted space.

Typical costs

• Side return infill: roughly £25,000-£40,000
• Single-storey rear extension: roughly £35,000-£70,000
• Double-storey extension: roughly £70,000-£130,000+

A double-storey extension isn't simply double the cost of a single-storey one - the roof, foundations and scaffolding are a large fixed cost, so the additional storey is often better value per square metre.

What affects the price locally

A significant part of Shoreditch falls inside the South Shoreditch conservation area, formed when the Shoreditch High Street and South Shoreditch conservation areas merged in 2009, part of the London Borough of Hackney's wider planning area - which shapes both what's permitted and what materials are expected. Matching original brick, slate or stone detailing here usually costs more than a standard modern finish, and tends to add time to the planning process as well.

Access is again a factor on the tighter terraced streets: scaffolding, skips and material deliveries on narrow roads near Hoxton Square and the Boundary Estate often need council permits, which a local builder will usually have already dealt with before.

Planning permission

Side return and single-storey rear extensions often qualify for permitted development if they stay within set size limits, but double-storey extensions almost always need full planning permission from the London Borough of Hackney. Get a pre-application check if your street falls within a conservation area - it's a small upfront cost that can save a redesign later.