House Extension Drawings in Barking and Dagenham

Which Barking and Dagenham postcodes does this house extension service cover?

Barking and Dagenham by postcode district: what stands in each, and who validates an extension application sent from it. Fees listed are the 2026 statutory rates that apply across England.

How does a house extension differ street by street across Barking and Dagenham?

Roofs in this borough are unusually uniform. Some 35.0% of its 81,790 homes went up between 1919 and 1929, most on the Becontree estate. Street to street, though, there is enough variation in roof pitch, in how a wall was built and in how much garden lies behind, to change what an extension can reach.

• Barking (IG11) — a house extension in Barking starts from victorian terraces, post-war flats, new-build, and Barking reads as Victorian centre, regen riverside. 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 IG11. Barking and Dagenham Council assesses Barking house extensions against its own Barking character guidance, and the location plan we draw for Barking references Barking Town Hall.
• Dagenham (RM8, RM9, RM10) — Becontree Estate, 1920s-30s defines Dagenham, where 1920s-30s estate housing (becontree) set what a house extension can do. Post-war houses on these estates often sit under an estate management scheme across RM8. Any Dagenham house extension is validated by Barking and Dagenham Council, with Dagenham Dock the usual Dagenham reference point on the site plan.
• Chadwell Heath (RM6) — 1930s semi-detached defines Chadwell Heath, where 1930s semi-detached set what a house extension can do. 1930s semis here have the deepest rear gardens in the area across RM6. Any Chadwell Heath house extension is validated by Barking and Dagenham Council, with Chadwell Heath station the usual Chadwell Heath reference point on the site plan.
• Becontree (RM8, RM9) — house extension work in Becontree means 1920s-30s estate housing. Becontree is 1920s-30s estate. Post-war houses on these estates often sit under an estate management scheme throughout RM8. Barking and Dagenham Council decides the Becontree application, and Becontree Tube anchors the Becontree location plan.
• Marks Gate (RM6) — a house extension in Marks Gate starts from post-war estate, and Marks Gate reads as post-war estate. Post-war houses on these estates often sit under an estate management scheme in RM6. Barking and Dagenham Council assesses Marks Gate house extensions against its own Marks Gate character guidance, and the location plan we draw for Marks Gate references Marks Gate.

Does Barking and Dagenham planning policy restrict a house extension?

Conservation areas covering Barking and Dagenham: Barking and Dagenham Council runs 9, and Becontree Estate (historic), Eastbury, Valence House are the ones Barking and Dagenham owners meet most. A house extension inside a Barking and Dagenham conservation area loses permitted development, so the Barking and Dagenham submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Eastbury a house extension is judged on the street elevation first.

Barking and Dagenham permitted development status: there is no borough-wide direction from Barking and Dagenham Council, so a house extension at a RM6 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a Barking and Dagenham sale to argue it later.

The building fabric around Barking and Dagenham: Becontree Estate (the world's largest council estate when built, 1920s-30s) dominates; post-war estates around Barking town; new-build riverside. Major regeneration in Barking Riverside; mostly permissive planning outside conservation pockets. A house extension in Barking and Dagenham is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Barking and Dagenham Council.

What happens if a Barking and Dagenham property sits on a boundary?

• Havering — the Havering boundary runs against Barking and Dagenham, so a house extension a street from Barking and Dagenham is decided by Havering Council instead. Havering runs 15 conservation areas across RM1 and its neighbours, which is why house extensions priced for Barking and Dagenham are re-checked against Havering policy whenever the Barking and Dagenham address sits on that edge.
• Redbridge — the Redbridge boundary runs against Barking and Dagenham, so a house extension a street from Barking and Dagenham is decided by Redbridge Council instead. Redbridge runs 14 conservation areas across E11 and its neighbours, which is why house extensions priced for Barking and Dagenham are re-checked against Redbridge policy whenever the Barking and Dagenham address sits on that edge.
• Newham — the Newham boundary runs against Barking and Dagenham, so a house extension a street from Barking and Dagenham is decided by Newham Council instead. Newham runs 10 conservation areas across E6 and its neighbours, which is why house extensions priced for Barking and Dagenham are re-checked against Newham policy whenever the Barking and Dagenham address sits on that edge.

Sources for this Barking and Dagenham 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.