House Extension Drawings in Bexley

Which postcode districts around Bexley do we cover for house extension work?

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

Which Bexley neighbourhoods suit a house extension best?

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

• Barnehurst (DA7) — 1930s semi-detached defines Barnehurst, where 1930s semi-detached set what a house extension can do. 1930s semis here have the deepest rear gardens in the area across DA7. Any Barnehurst house extension is validated by Bexley Council, with Barnehurst station the usual Barnehurst reference point on the site plan.
• Bexleyheath (DA6, DA7) — 1930s semi-detached defines Bexleyheath, where 1930s semi-detached set what a house extension can do. 1930s semis here have the deepest rear gardens in the area across DA6. Any Bexleyheath house extension is validated by Bexley Council, with Bexleyheath Broadway the usual Bexleyheath reference point on the site plan.
• Sidcup (DA14, DA15) — house extension work in Sidcup means 1930s semi-detached, edwardian villas. Sidcup is 1930s semi-detached, Edwardian villas. Edwardian plots here are wider throughout DA14. Bexley Council decides the Sidcup application, and Sidcup station anchors the Sidcup location plan.
• Welling (DA16) — house extension work in Welling means 1930s semi-detached. Welling is 1930s semi-detached. 1930s semis here have the deepest rear gardens in the area throughout DA16. Bexley Council decides the Welling application, and Welling High Street anchors the Welling location plan.
• Erith (DA8) — a house extension in Erith starts from victorian terraces, post-war estates, and Erith reads as Victorian terraces, post-war estates. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage in DA8. Bexley Council assesses Erith house extensions against its own Erith character guidance, and the location plan we draw for Erith references Erith Riverside.
• Crayford (DA1) — Victorian terraces, 1930s semi-detached defines Crayford, where victorian terraces, 1930s semi-detached set what a house extension can do. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage across DA1. Any Crayford house extension is validated by Bexley Council, with Crayford station the usual Crayford reference point on the site plan.
• Old Bexley (DA5) — a house extension in Old Bexley starts from georgian villas, victorian cottages, and Old Bexley reads as Georgian and Victorian village conservation. Georgian rear elevations here are usually the listed or locally listed face of the building in DA5. Bexley Council assesses Old Bexley house extensions against its own Old Bexley character guidance, and the location plan we draw for Old Bexley references Old Bexley Village.

Does Bexley planning policy restrict a house extension?

Conservation areas covering Bexley: Bexley Council runs 16, and Welling, Bexley Village, Old Bexley are the ones Bexley owners meet most. A house extension inside a Bexley conservation area loses permitted development, so the Bexley submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Welling a house extension is judged on the street elevation first.

Bexley permitted development status: there is no borough-wide direction from Bexley Council, so a house extension at a DA1 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a Bexley sale to argue it later.

What Bexley is built from: 1930s semi-detached dominates; Victorian cottages in Bexley Village and Crayford; post-war estates in Thamesmead and Erith. Outer south-east London suburban; very permissive planning environment; strong PD uptake for extensions and loft conversions. That mix decides the house extension route in Bexley more than the postcode does, and it is what a Bexley Council case officer reads first. A householder application costs £548 paid to Bexley Council direct, with 8 weeks to a decision once validated.

Which neighbouring authorities border Bexley?

• Greenwich — adjoining Bexley, with 20 conservation areas centred on SE3. A house extension on the far side of the Bexley line is determined by Greenwich Council, so the Bexley quote for house extensions is checked against Greenwich guidance before it is issued.
• Bromley — the Bromley boundary runs against Bexley, so a house extension a street from Bexley is decided by Bromley Council instead. Bromley runs 48 conservation areas across BR1 and its neighbours, which is why house extensions priced for Bexley are re-checked against Bromley policy whenever the Bexley address sits on that edge.

Sources for this Bexley house 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.