Kitchen Extension Cost in Poplar: 2026 Price Guide

Poplar - where period terraces around St Matthias Church, alongside the post-war Lansbury Estate built as part of the 1951 Festival of Britain - sees a steady stream of rear kitchen extensions, and for good reason: it's often the single change that makes the biggest difference to how a house actually lives day to day.

Typical costs

• Small extension (up to 15m²): roughly £30,000-£45,000
• Medium extension (15-25m²): roughly £45,000-£70,000
• Larger or wraparound extension (25m²+): £70,000 upwards

These figures are a guide, not a quote - they cover building work, a standard fit-out, and typical finishes. Bifold or sliding doors, roof lanterns, underfloor heating and a higher-spec kitchen will all add to the total.

What affects the price locally

Access is usually what separates a straightforward Poplar quote from an expensive one. Terraces without a side passage mean everything - materials in, spoil out - goes through the house, and builders price that in accordingly. Add to that the St Matthias Church, Poplar and Lansbury conservation areas, where matching brick, roofline and window detailing to the existing building is typically expected even for extensions that wouldn't otherwise need planning permission.

Don't overlook foundations either: much of the older housing stock close to All Saints Church, Poplar sits on shallow Victorian or Edwardian footings, which a structural engineer will often want to deepen or extend before an extension can be signed off.

Do you need planning permission?

Permitted development covers a lot of single-storey rear extensions, but not without limits, and those limits bite harder on terraced and semi-detached houses than detached ones. Inside Poplar's conservation areas, expect those rights to be trimmed back further still - check with the London Borough of Tower Hamlets's planning department, or a builder who already works locally, before finalising a design.