Which Tower Hamlets postcodes does this basement extension service cover?
Every Tower Hamlets postcode district we draw in, the stock that dominates
it and the authority that validates a basement extension there. Tower Hamlets fees below are the
statutory England rates for 2026, not basement extension estimates.
| Postcode | Area | Dominant stock | What it means for a basement extension |
|---|
| E1 | Whitechapel / Spitalfields | Warehouse conversions, modern infill | A basement extension at an E1 address in Whitechapel / Spitalfields is determined by Tower Hamlets Council under its own Local Plan policies for Whitechapel / Spitalfields. |
| E1W | Wapping | Georgian terraces, warehouse conversions | Wapping sits wholly inside E1W, so Tower Hamlets Council validates every basement extension submitted from an E1W address. |
| E2 | Bethnal Green | Warehouse conversions, modern infill | A basement extension in Bethnal Green may land with Tower Hamlets Council or Hackney Council — E2 crosses the boundary, and the E2 policies map decides it street by street. |
| E3 | Bow | Victorian terraces, Georgian fragments | A basement extension at an E3 address in Bow is determined by Tower Hamlets Council under its own Local Plan policies for Bow. |
| E14 | Canary Wharf / Poplar / Limehouse | Modern apartments | Canary Wharf / Poplar / Limehouse sits wholly inside E14, so Tower Hamlets Council validates every basement extension submitted from an E14 address. |
What changes about a basement extension in each part of Tower Hamlets?
Roof pitch, wall build-up and plot depth change every few Tower Hamlets
streets, and each one changes what a basement extension can achieve at that address.
- Bethnal Green (E2) — Victorian terraces, post-war estates defines Bethnal Green, where victorian terraces, post-war estates set what a basement extension can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across E2. Any Bethnal Green basement extension is validated by Tower Hamlets Council, with Victoria Park the usual Bethnal Green reference point on the site plan.
- Bow (E3) — a basement extension in Bow starts from victorian terraces, georgian fragments, and Bow reads as Victorian terraces, Georgian fragments. Georgian houses here already have a vault and a lower-ground floor in E3. Tower Hamlets Council assesses Bow basement extensions against its own Bow character guidance, and the location plan we draw for Bow references Bow Bells.
- Mile End (E1, E3) — basement extension work in Mile End means victorian terraces, post-war estates. Mile End is Victorian terraces, post-war estates. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged throughout E1. Tower Hamlets Council decides the Mile End application, and Mile End Park anchors the Mile End location plan.
- Wapping (E1W) — a basement extension in Wapping starts from georgian terraces, warehouse conversions, and Wapping reads as Georgian fragments, warehouse conversions. Georgian houses here already have a vault and a lower-ground floor in E1W. Tower Hamlets Council assesses Wapping basement extensions against its own Wapping character guidance, and the location plan we draw for Wapping references St Katharine Docks.
- Canary Wharf (E14) — modern high-density towers defines Canary Wharf, where modern apartments set what a basement extension can do. Modern foundations here are usually raft or piled across E14. Any Canary Wharf basement extension is validated by Tower Hamlets Council, with One Canada Square the usual Canary Wharf reference point on the site plan.
- Limehouse (E14) — Georgian and Victorian terraces, dockside defines Limehouse, where georgian and victorian terraces, warehouse conversions set what a basement extension can do. Georgian houses here already have a vault and a lower-ground floor across E14. Any Limehouse basement extension is validated by Tower Hamlets Council, with Limehouse Basin the usual Limehouse reference point on the site plan.
- Poplar (E14) — a basement extension in Poplar starts from post-war estates, new-build, and Poplar reads as post-war estates, regen. Post-war slab foundations make basements here expensive and rarely viable in E14. Tower Hamlets Council assesses Poplar basement extensions against its own Poplar character guidance, and the location plan we draw for Poplar references Robin Hood Gardens (former).
Does Tower Hamlets planning policy restrict a basement extension?
Conservation areas covering Tower Hamlets: Tower Hamlets Council runs 58, and Tredegar Square, Wapping Pierhead, Spitalfields are the ones Tower Hamlets owners meet most. A basement extension inside a Tower Hamlets conservation area loses permitted development, so the Tower Hamlets submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Fournier Street a basement extension is judged on the street elevation first.
Article 4 and your Tower Hamlets basement extension: Article 4 for HMOs borough-wide; additional Article 4 covering office-to-residential in Canary Wharf and City Fringe. At a E1 address that matters twice over, because Tower Hamlets Council applies the direction unevenly across Tower Hamlets — we read the Tower Hamlets policies map for the exact E1 address before quoting basement extensions.
Tower Hamlets housing stock: Georgian in Spitalfields and Wapping; Victorian industrial conversions; extensive post-war social housing; modern high-density towers in Canary Wharf and Aldgate. High heritage value in pockets (Spitalfields, Wapping), mixed with substantial regeneration areas; active planning committee. Read that before choosing a basement extension route in Tower Hamlets — construction, not postcode, sets what is achievable.
Which neighbouring authorities border Tower Hamlets?
- Newham — the Newham boundary runs against Tower Hamlets, so a basement extension a street from Tower Hamlets is decided by Newham Council instead. Newham runs 10 conservation areas across E6 and its neighbours, which is why basement extensions priced for Tower Hamlets are re-checked against Newham policy whenever the Tower Hamlets address sits on that edge.
- City of London — adjoining Tower Hamlets, with 27 conservation areas centred on EC1. A basement extension on the far side of the Tower Hamlets line is determined by City of London Corporation, so the Tower Hamlets quote for basement extensions is checked against City of London guidance before it is issued.
- Southwark — the Southwark boundary runs against Tower Hamlets, so a basement extension a street from Tower Hamlets is decided by Southwark Council instead. Southwark runs 43 conservation areas across SE1 and its neighbours, which is why basement extensions priced for Tower Hamlets are re-checked against Southwark policy whenever the Tower Hamlets address sits on that edge.
- Greenwich — the Greenwich boundary runs against Tower Hamlets, so a basement extension a street from Tower Hamlets is decided by Greenwich Council instead. Greenwich runs 20 conservation areas across SE3 and its neighbours, which is why basement extensions priced for Tower Hamlets are re-checked against Greenwich policy whenever the Tower Hamlets address sits on that edge.
Sources for this Tower Hamlets basement 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.
