House Extension Drawings in St John's Wood (NW8)

Which NW8 postcodes does this house extension service cover?

Every NW8 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. NW8 fees below are the statutory England rates for 2026, not house extension estimates.

Which NW8 neighbourhoods suit a house extension best?

Roof pitch, wall build-up and plot depth change every few NW8 streets, and each one changes what a house extension can achieve at that address.

• Inside NW8: St John's Wood (NW8) — house extension 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 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.
• Bordering NW8: Mayfair (W1J, W1K) — house extension 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 throughout W1J. Westminster City Council decides the Mayfair application, and Berkeley Square anchors the Mayfair location plan.
• Bordering NW8: Belgravia (SW1X, SW1W) — a house extension in Belgravia starts from regency stucco terraces, listed buildings, and Belgravia reads as white stucco Regency terraces. The side-return infill is the classic move on these Victorian terraces — 3 in SW1X. Westminster City Council assesses Belgravia house extensions against its own Belgravia character guidance, and the location plan we draw for Belgravia references Eaton Square.
• Bordering NW8: Marylebone (W1U, W1G, W1H) — house extension work in Marylebone means georgian terraces, edwardian mansion blocks. Marylebone is Georgian and Victorian terraces, mansion blocks. Georgian rear elevations here are usually the listed or locally listed face of throughout W1U. Westminster City Council decides the Marylebone application, and Marylebone High Street anchors the Marylebone location plan.
• Bordering NW8: Pimlico (SW1V) — Regency stucco terraces, grid plan defines Pimlico, where regency terraces, post-war estates set what a house extension can do. Post-war houses on these estates often sit under an estate management scheme across SW1V. Any Pimlico house extension is validated by Westminster City Council, with Tate Britain the usual Pimlico reference point on the site plan.
• Bordering NW8: Soho (W1D, W1F) — a house extension in Soho starts from georgian terraces, mixed-use, and Soho reads as Georgian fragments, mixed-use. Georgian rear elevations here are usually the listed or locally listed face of in W1D. Westminster City Council assesses Soho house extensions against its own Soho character guidance, and the location plan we draw for Soho references Soho Square.
• Bordering NW8: Covent Garden (WC2E, WC2H) — Georgian piazza, listed buildings defines Covent Garden, where georgian terraces, conversions set what a house extension can do. Georgian rear elevations here are usually the listed or locally listed face of across WC2E. Any Covent Garden house extension is validated by Westminster City Council, with Royal Opera House the usual Covent Garden reference point on the site plan.
• Bordering NW8: Bayswater (W2) — Victorian stucco terraces defines Bayswater, where victorian stucco terraces set what a house extension can do. The side-return infill is the classic move on these Victorian terraces — 3 across W2. Any Bayswater house extension is validated by Westminster City Council, with Hyde Park the usual Bayswater reference point on the site plan.
• Bordering NW8: Paddington (W2) — Regency and Victorian terraces, canal-side regen defines Paddington, where regency terraces, modern apartments set what a house extension can do. Modern housing here is frequently covered by a planning condition removing permitted development across W2. Any Paddington house extension is validated by Westminster City Council, with Paddington Basin the usual Paddington reference point on the site plan.
• Bordering NW8: Victoria (SW1E, SW1W) — Regency terraces, mixed-use defines Victoria, where regency terraces, post-war flats set what a house extension can do. Post-war houses on these estates often sit under an estate management scheme across SW1E. Any Victoria house extension is validated by Westminster City Council, with Victoria Station the usual Victoria reference point on the site plan.

Does NW8 planning policy restrict a house extension?

NW8 (St John's Wood) conservation designations: there are 56 across Westminster City Council, Marylebone, Pimlico, Soho among them. Designation costs a NW8 (St John's Wood) owner the permitted-development route: a house extension then needs a £258 householder application over 8 weeks, in place of the £120 prior approval route that takes 6 weeks. Belgravia is the NW8 (St John's Wood) designation that most often changes a house extension design.

NW8 (St John's Wood) and Article 4: Multiple Article 4 Directions — office-to-residential restrictions, HMO conversions, retail to residential in shopping zones. A house extension planned at a NW8 address is checked against that direction first; Westminster City Council publishes the NW8 (St John's Wood) extent, and the NW8 line rarely follows the NW8 (St John's Wood) boundary you would expect.

Digging below a NW8 (St John's Wood) 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 extension in NW8 (St John's Wood) involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a NW8 (St John's Wood) dig within 3 m of a neighbour, and Westminster City Council expects the NW8 ground conditions addressed in the application.

NW8 (St John's Wood) housing stock: 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. Read that before choosing a house extension route in NW8 (St John's Wood) — construction, not postcode, sets what is achievable. House extensions in NW8 (St John's Wood) start at £1,225 on a fixed fee, or £1,750 for the Complete package covering both Westminster City Council submissions.

NW8 (St John's Wood) conservation designations: there are 40 across Camden Council, Bloomsbury, Camden Town, Fitzrovia among them. Designation costs a NW8 (St John's Wood) owner the permitted-development route: a house extension then needs a £258 householder application over 8 weeks, in place of the £120 prior approval route that takes 6 weeks. Primrose Hill is the NW8 (St John's Wood) designation that most often changes a house extension design.

NW8 (St John's Wood) and Article 4: Article 4 removes permitted development for HMO conversions (C3 to C4) across the borough, plus restrictions on basement extensions in 12 conservation areas. A house extension planned at a NW8 address is checked against that direction first; Camden Council publishes the NW8 (St John's Wood) extent, and the NW8 line rarely follows the NW8 (St John's Wood) boundary you would expect.

Digging below a NW8 (St John's Wood) property: Camden's basement policy (Policy A5) restricts single-storey basements to 50% of garden area; double-storey basements generally refused outside commercial zones. Where a house extension in NW8 (St John's Wood) involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a NW8 (St John's Wood) dig within 3 m of a neighbour, and Camden Council expects the NW8 ground conditions addressed in the application.

NW8 (St John's Wood) housing stock: Victorian and Edwardian terraces, Georgian townhouses in Bloomsbury and Hampstead, post-war mansion blocks, modern developments in King's Cross. Creative, affluent in Hampstead and Primrose Hill; dense mixed-use around Camden Town and Kings Cross; academic character in Bloomsbury. Read that before choosing a house extension route in NW8 (St John's Wood) — construction, not postcode, sets what is achievable. House extensions in NW8 (St John's Wood) start at £1,225 on a fixed fee, or £1,750 for the Complete package covering both Camden Council submissions.

Which neighbouring authorities border NW8?

• Camden — the Camden boundary runs against Westminster, so a house extension a street from NW8 (St John's Wood) is decided by Camden Council instead. Camden runs 40 conservation areas across NW1 and its neighbours, which is why house extensions priced for NW8 (St John's Wood) are re-checked against Camden policy whenever the NW8 (St John's Wood) address sits on that edge.
• Kensington and Chelsea — the Kensington and Chelsea boundary runs against Westminster, so a house extension a street from NW8 (St John's Wood) 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 NW8 (St John's Wood) are re-checked against Kensington and Chelsea policy whenever the NW8 (St John's Wood) address sits on that edge.
• Wandsworth — the Wandsworth boundary runs against Westminster, so a house extension a street from NW8 (St John's Wood) is decided by Wandsworth Council instead. Wandsworth runs 45 conservation areas across SW8 and its neighbours, which is why house extensions priced for NW8 (St John's Wood) are re-checked against Wandsworth policy whenever the NW8 (St John's Wood) address sits on that edge.
• Lambeth — the Lambeth boundary runs against Westminster, so a house extension a street from NW8 (St John's Wood) is decided by Lambeth Council instead. Lambeth runs 64 conservation areas across SE1 and its neighbours, which is why house extensions priced for NW8 (St John's Wood) are re-checked against Lambeth policy whenever the NW8 (St John's Wood) address sits on that edge.
• Barnet — the Barnet boundary runs against Camden, so a house extension a street from NW8 (St John's Wood) is decided by Barnet Council instead. Barnet runs 20 conservation areas across N2 and its neighbours, which is why house extensions priced for NW8 (St John's Wood) are re-checked against Barnet policy whenever the NW8 (St John's Wood) address sits on that edge.
• Haringey — the Haringey boundary runs against Camden, so a house extension a street from NW8 (St John's Wood) is decided by Haringey Council instead. Haringey runs 29 conservation areas across N4 and its neighbours, which is why house extensions priced for NW8 (St John's Wood) are re-checked against Haringey policy whenever the NW8 (St John's Wood) address sits on that edge.
• Brent — the Brent boundary runs against Camden, so a house extension a street from NW8 (St John's Wood) is decided by Brent Council instead. Brent runs 22 conservation areas across NW2 and its neighbours, which is why house extensions priced for NW8 (St John's Wood) are re-checked against Brent policy whenever the NW8 (St John's Wood) address sits on that edge.
• City of London — adjoining NW8 (St John's Wood), with 27 conservation areas centred on EC1. A house extension on the far side of the NW8 (St John's Wood) line is determined by City of London Corporation, so the NW8 (St John's Wood) quote for house extensions is checked against City of London guidance before it is issued.

Sources for this NW8 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.