Two-storey rear extension in Westbourne Green

Where in Westbourne Green does a house extensions actually get determined?

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

How does a house extensions differ street by street across Westbourne Green?

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

• Westbourne Green (W2, W9) — house extensions work in Westbourne Green means victorian terraces, mansion blocks. Westbourne Green is Victorian terraces and mansion blocks. 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 throughout W2. Westminster City Council decides the Westbourne Green application, and Royal Oak anchors the Westbourne Green location plan.
• Near Westbourne Green: St John's Wood (NW8) — house extensions work in St John's Wood means victorian villas, mansion blocks. St John's Wood is Victorian villas, mansion blocks. 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 throughout NW8. Westminster City Council decides the St John's Wood application, and Lord's Cricket Ground anchors the St John's Wood location plan.
• Near Westbourne Green: Bayswater (W2) — a house extensions in Bayswater starts from victorian stucco terraces, and Bayswater reads as Victorian stucco terraces. 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 W2. Westminster City Council assesses Bayswater house extensions against its own Bayswater character guidance, and the location plan we draw for Bayswater references Hyde Park.
• Near Westbourne Green: Paddington (W2) — Regency and Victorian terraces, canal-side regen defines Paddington, where regency terraces, modern apartments set what a house extensions can do. Modern housing here is frequently covered by a planning condition removing permitted development rights across W2. Any Paddington house extensions is validated by Westminster City Council, with Paddington Basin the usual Paddington reference point on the site plan.
• Near Westbourne Green: Victoria (SW1E, SW1W) — a house extensions in Victoria starts from regency terraces, post-war flats, and Victoria reads as Regency terraces, mixed-use. Post-war houses on these estates often sit under an estate management scheme in SW1E. Westminster City Council assesses Victoria house extensions against its own Victoria character guidance, and the location plan we draw for Victoria references Victoria Station.
• Near Westbourne Green: Maida Vale (W9) — house extensions work in Maida Vale means edwardian mansion blocks, victorian villas. Maida Vale is Edwardian mansion blocks, canal-side. 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 throughout W9. Westminster City Council decides the Maida Vale application, and Little Venice anchors the Maida Vale location plan.
• Near Westbourne Green: Mayfair (W1J, W1K) — house extensions work in Mayfair means georgian townhouses, listed buildings. Mayfair is Georgian listed townhouses, luxury. Georgian rear elevations here are usually the listed or locally listed face of the building throughout W1J. Westminster City Council decides the Mayfair application, and Berkeley Square anchors the Mayfair location plan.

How do conservation areas and Article 4 affect a house extensions in Westbourne Green?

Westbourne Green conservation designations: there are 56 across Westminster City Council, Marylebone, Pimlico, Soho among them. Designation costs a Westbourne Green owner the permitted-development route: a house extensions then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. St John's Wood is the Westbourne Green designation that most often changes a house extensions design.

What Article 4 removes near Westbourne Green: Multiple Article 4 Directions — office-to-residential restrictions, HMO conversions, retail to residential in shopping zones. Before pricing a house extensions we check whether the W2 address is inside the mapped area, because Westminster City Council draws the Westbourne Green boundary street by street rather than across the whole of Westbourne Green.

Digging below a Westbourne Green property: Westminster basement policy restricts to single-storey, typically under 50% of rear garden footprint; lightwells and rooflights strictly controlled in conservation areas. Where a house extensions in Westbourne Green involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a Westbourne Green dig within 3 m of a neighbour, and Westminster City Council expects the W2 ground conditions addressed in the application.

The building fabric around Westbourne Green: Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density. Heritage-first planning approach; listed buildings on almost every street; basement and rear extension policies particularly strict. A house extensions in Westbourne Green is scoped against that stock first.

Which neighbouring authorities border Westbourne Green?

• Camden — the Camden boundary runs against Westminster, so a house extensions a street from Westbourne Green is decided by Camden Council instead. Camden runs 40 conservation areas across NW1 and its neighbours, which is why house extensions priced for Westbourne Green are re-checked against Camden policy whenever the Westbourne Green address sits on that edge.
• Kensington and Chelsea — the Kensington and Chelsea boundary runs against Westminster, so a house extensions a street from Westbourne Green is decided by RBKC Planning instead. Kensington and Chelsea runs 38 conservation areas across SW1 and its neighbours, which is why house extensions priced for Westbourne Green are re-checked against Kensington and Chelsea policy whenever the Westbourne Green address sits on that edge.
• Wandsworth — the Wandsworth boundary runs against Westminster, so a house extensions a street from Westbourne Green is decided by Wandsworth Council instead. Wandsworth runs 45 conservation areas across SW8 and its neighbours, which is why house extensions priced for Westbourne Green are re-checked against Wandsworth policy whenever the Westbourne Green address sits on that edge.
• Lambeth — the Lambeth boundary runs against Westminster, so a house extensions a street from Westbourne Green is decided by Lambeth Council instead. Lambeth runs 64 conservation areas across SE1 and its neighbours, which is why house extensions priced for Westbourne Green are re-checked against Lambeth policy whenever the Westbourne Green address sits on that edge.

Sources for this Westbourne Green house extensions 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.