Which postcode districts around Hackney do we cover for basement extension work?
Every Hackney postcode district we draw in, the stock that dominates
it and the authority that validates a basement extension there. Hackney fees below are the
statutory England rates for 2026, not basement extension estimates.
| Postcode | Area | Dominant stock | What it means for a basement extension |
|---|
| N16 | Stoke Newington / Stamford Hill | Georgian and Victorian terraces | N16 straddles a boundary: Stoke Newington / Stamford Hill addresses fall to Hackney Council or Islington Council, so confirm which authority validates the basement extension before submitting N16 drawings. |
| E5 | Clapton | Victorian terraces, mansion blocks | Clapton sits wholly inside E5, so Hackney Council validates every basement extension submitted from an E5 address. |
| E8 | Hackney Central / Dalston / London Fields | Victorian terraces, post-war flats | A basement extension at an E8 address in Hackney Central / Dalston / London Fields is determined by Hackney Council under its own Local Plan policies for Hackney Central / Dalston / London Fields. |
| E9 | Homerton / Hackney Wick | Victorian terraces, post-war estates | Homerton / Hackney Wick sits wholly inside E9, so Hackney Council validates every basement extension submitted from an E9 address. |
| EC2A | Shoreditch | Warehouse conversions, modern infill | EC2A straddles a boundary: Shoreditch addresses fall to Hackney Council or City of London Corporation, so confirm which authority validates the basement extension before submitting EC2A drawings. |
| N1 | Islington / Hoxton | Georgian and early Victorian terraces | Islington / Hoxton is split at N1. Either Islington Council or Hackney Council can determine a basement extension here, so the N1 address is checked against both policies maps first. |
| N4 | Finsbury Park / Stroud Green | Victorian terraces, post-war estates | Finsbury Park / Stroud Green is split at N4. Either Haringey Council or Islington Council or Hackney Council can determine a basement extension here, so the N4 address is checked against both policies maps first. |
| 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. |
How does a basement extension differ street by street across Hackney?
Roof pitch, wall build-up and plot depth change every few Hackney
streets, and each one changes what a basement extension can achieve at that address.
- Stamford Hill (N16) — a basement extension in Stamford Hill starts from victorian villas, edwardian terraces, and Stamford Hill reads as Victorian villas, Edwardian terraces. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in N16. Hackney Council assesses Stamford Hill basement extensions against its own Stamford Hill character guidance, and the location plan we draw for Stamford Hill references Stamford Hill.
- Dalston (E8) — a basement extension in Dalston starts from victorian terraces, post-war flats, and Dalston reads as Victorian terraces, vibrant high street. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in E8. Hackney Council assesses Dalston basement extensions against its own Dalston character guidance, and the location plan we draw for Dalston references Ridley Road Market.
- Stoke Newington (N16) — Victorian terraces, village character defines Stoke Newington, where victorian terraces, georgian fragments set what a basement extension can do. Georgian houses here already have a vault and a lower-ground floor across N16. Any Stoke Newington basement extension is validated by Hackney Council, with Clissold Park the usual Stoke Newington reference point on the site plan.
- Shoreditch (E1, E2, EC2A) — Victorian warehouse conversions, creative industries defines Shoreditch, where warehouse conversions, modern infill set what a basement extension can do. Modern foundations here are usually raft or piled across E1. Any Shoreditch basement extension is validated by Hackney Council, with Boxpark the usual Shoreditch reference point on the site plan.
- Hackney Central (E8) — basement extension work in Hackney Central means victorian terraces, post-war estates, new-build. Hackney Central is regenerated centre, Victorian terraces around. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged throughout E8. Hackney Council decides the Hackney Central application, and Hackney Empire anchors the Hackney Central location plan.
- London Fields (E8) — a basement extension in London Fields starts from victorian terraces, and London Fields reads as Victorian terraces around the park. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in E8. Hackney Council assesses London Fields basement extensions against its own London Fields character guidance, and the location plan we draw for London Fields references London Fields park.
- Clapton (E5) — Victorian terraces, Lea valley fringe defines Clapton, where victorian terraces, mansion blocks set what a basement extension can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across E5. Any Clapton basement extension is validated by Hackney Council, with Lea Bridge the usual Clapton reference point on the site plan.
Does Hackney planning policy restrict a basement extension?
How designation changes a Hackney basement extension: Hackney Council maintains 29 conservation areas, including Stoke Newington, Dalston Lane, Hackney Central. Inside any of them a Hackney basement extension cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. De Beauvoir Town sets the tone for Hackney casework.
What Article 4 removes near Hackney: Article 4 Direction covers HMO conversions borough-wide and office-to-residential in specific commercial zones. Before pricing a basement extension we check whether the N16 address is inside the mapped area, because Hackney Council draws the Hackney boundary street by street rather than across the whole of Hackney.
Hackney housing stock: Victorian terraces dominate; large post-war estates around Hackney Wick; Georgian fragments in De Beauvoir and Stoke Newington; new-build around the Olympic Park. Young demographic; high design-quality bar in planning; mansards routinely approved in rear-of-terrace positions within conservation areas following the Hackney design guide. Read that before choosing a basement extension route in Hackney — construction, not postcode, sets what is achievable.
What happens if a Hackney property sits on a boundary?
- Newham — the Newham boundary runs against Hackney, so a basement extension a street from Hackney is decided by Newham Council instead. Newham runs 10 conservation areas across E6 and its neighbours, which is why basement extensions priced for Hackney are re-checked against Newham policy whenever the Hackney address sits on that edge.
- Tower Hamlets — the Tower Hamlets boundary runs against Hackney, so a basement extension a street from Hackney is decided by Tower Hamlets Council instead. Tower Hamlets runs 58 conservation areas across E1 and its neighbours, which is why basement extensions priced for Hackney are re-checked against Tower Hamlets policy whenever the Hackney address sits on that edge.
- City of London — cross the Hackney boundary and City of London Corporation takes the basement extension instead, applying 27 conservation areas of its own around EC1. We re-price basement extensions at the Hackney edge because City of London policy and Hackney policy rarely align on basement extension depth.
- Islington — the Islington boundary runs against Hackney, so a basement extension a street from Hackney is decided by Islington Council instead. Islington runs 40 conservation areas across N1 and its neighbours, which is why basement extensions priced for Hackney are re-checked against Islington policy whenever the Hackney address sits on that edge.
Sources for this Hackney 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.
