Basement Conversion Drawings in Greenwich

Which postcode districts around Greenwich do we cover for basement conversion work?

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

What changes about a basement conversion in each part of Greenwich?

Roof pitch, wall build-up and plot depth change every few Greenwich streets, and each one changes what a basement conversion can achieve at that address.

• Thamesmead (SE28) — basement conversion work in Thamesmead means post-war estates, new-build. Thamesmead is post-war estate, Brutalist origins, regen. Post-war slab foundations make basements here expensive and rarely viable throughout SE28. Greenwich Council decides the Thamesmead application, and Thamesmead Town Centre anchors the Thamesmead location plan.
• Kidbrooke (SE3) — a basement conversion in Kidbrooke starts from new-build, post-war fragments, and Kidbrooke reads as regenerated quarter, new-build estate. Post-war slab foundations make basements here expensive and rarely viable in SE3. Greenwich Council assesses Kidbrooke basement conversions against its own Kidbrooke character guidance, and the location plan we draw for Kidbrooke references Kidbrooke Village.
• New Eltham (SE9) — a basement conversion in New Eltham starts from 1930s semi-detached, and New Eltham reads as 1930s semi-detached. 1930s houses were built without cellars in SE9. Greenwich Council assesses New Eltham basement conversions against its own New Eltham character guidance, and the location plan we draw for New Eltham references New Eltham station.
• Greenwich (SE10) — Georgian World Heritage centre defines Greenwich, where georgian terraces, listed buildings set what a basement conversion can do. Georgian houses here already have a vault and a lower-ground floor across SE10. Any Greenwich basement conversion is validated by Greenwich Council, with Royal Observatory the usual Greenwich reference point on the site plan.
• Charlton (SE7) — basement conversion work in Charlton means victorian villas, 1930s semi-detached. Charlton is Victorian villas, 1930s semi-detached. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged throughout SE7. Greenwich Council decides the Charlton application, and Charlton House anchors the Charlton location plan.
• Woolwich (SE18) — basement conversion work in Woolwich means georgian fragments, post-war estates, new-build. Woolwich is Georgian arsenal heritage, riverside regen. Georgian houses here already have a vault and a lower-ground floor throughout SE18. Greenwich Council decides the Woolwich application, and Royal Arsenal anchors the Woolwich location plan.
• Eltham (SE9) — basement conversion work in Eltham means 1930s semi-detached, post-war flats. Eltham is 1930s semi-detached, Tudor fragments. 1930s houses were built without cellars throughout SE9. Greenwich Council decides the Eltham application, and Eltham Palace anchors the Eltham location plan.

How do conservation areas and Article 4 affect a basement conversion in Greenwich?

Conservation areas covering Greenwich: Greenwich Council runs 20, and Greenwich Town Centre (World Heritage Site), Blackheath, Charlton are the ones Greenwich owners meet most. A basement conversion inside a Greenwich conservation area loses permitted development, so the Greenwich submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Eltham Park a basement conversion is judged on the street elevation first.

Greenwich permitted development status: there is no borough-wide direction from Greenwich Council, so a basement conversion at a SE2 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a Greenwich sale to argue it later.

Greenwich housing stock: Georgian in Greenwich town centre; Victorian terraces in East Greenwich, Charlton; inter-war semi-detached in Eltham; new-build along the riverside. World Heritage Site status in Greenwich town centre adds heritage weight; outer borough areas (Eltham, Thamesmead) generally permissive. Read that before choosing a basement conversion route in Greenwich — construction, not postcode, sets what is achievable. Greenwich Council charges £548 for a householder application and has 8 weeks to determine it.

What happens if a Greenwich property sits on a boundary?

• Bexley — adjoining Greenwich, with 16 conservation areas centred on DA1. A basement conversion on the far side of the Greenwich line is determined by Bexley Council, so the Greenwich quote for basement conversions is checked against Bexley guidance before it is issued.
• Bromley — the Bromley boundary runs against Greenwich, so a basement conversion a street from Greenwich is decided by Bromley Council instead. Bromley runs 48 conservation areas across BR1 and its neighbours, which is why basement conversions priced for Greenwich are re-checked against Bromley policy whenever the Greenwich address sits on that edge.
• Newham — adjoining Greenwich, with 10 conservation areas centred on E6. A basement conversion on the far side of the Greenwich line is determined by Newham Council, so the Greenwich quote for basement conversions is checked against Newham guidance before it is issued.
• Tower Hamlets — cross the Greenwich boundary and Tower Hamlets Council takes the basement conversion instead, applying 58 conservation areas of its own around E1. We re-price basement conversions at the Greenwich edge because Tower Hamlets policy and Greenwich policy rarely align on basement conversion depth.

Sources for this Greenwich basement conversion 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.