Architectural drawings in SW1X

Which SW1X postcodes does this drawing package service cover?

Every SW1X postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. SW1X fees below are the statutory England rates for 2026, not drawing package estimates.

Which SW1X neighbourhoods suit a drawing package best?

Roof pitch, wall build-up and plot depth change every few SW1X streets, and each one changes what a drawing package can achieve at that address.

• Inside SW1X: Belgravia (SW1X, SW1W) — white stucco Regency terraces defines Belgravia, where regency stucco terraces, listed buildings set what a drawing package can do. Any Belgravia drawing package is validated by Westminster City Council, with Eaton Square the usual Belgravia reference point on the site plan.
• Inside SW1X: Knightsbridge (SW1X, SW7) — Regency and Victorian terraces, luxury defines Knightsbridge, where regency and victorian terraces, mansion blocks set what a drawing package can do. Any Knightsbridge drawing package is validated by RBKC Planning, with Harrods the usual Knightsbridge reference point on the site plan.
• Bordering SW1X: Mayfair (W1J, W1K) — drawing package work in Mayfair means georgian townhouses, listed buildings. Mayfair is Georgian listed townhouses, luxury. Westminster City Council decides the Mayfair application, and Berkeley Square anchors the Mayfair location plan.
• Bordering SW1X: Marylebone (W1U, W1G, W1H) — a drawing package in Marylebone starts from georgian terraces, edwardian mansion blocks, and Marylebone reads as Georgian and Victorian terraces, mansion blocks. in W1U. Westminster City Council assesses Marylebone architectural drawings against its own Marylebone character guidance, and the location plan we draw for Marylebone references Marylebone High Street.
• Bordering SW1X: Pimlico (SW1V) — a drawing package in Pimlico starts from regency terraces, post-war estates, and Pimlico reads as Regency stucco terraces, grid plan. in SW1V. Westminster City Council assesses Pimlico architectural drawings against its own Pimlico character guidance, and the location plan we draw for Pimlico references Tate Britain.
• Bordering SW1X: Soho (W1D, W1F) — Georgian fragments, mixed-use defines Soho, where georgian terraces, mixed-use set what a drawing package can do. Any Soho drawing package is validated by Westminster City Council, with Soho Square the usual Soho reference point on the site plan.
• Bordering SW1X: Covent Garden (WC2E, WC2H) — drawing package work in Covent Garden means georgian terraces, conversions. Covent Garden is Georgian piazza, listed buildings. Westminster City Council decides the Covent Garden application, and Royal Opera House anchors the Covent Garden location plan.
• Bordering SW1X: St John's Wood (NW8) — drawing package work in St John's Wood means victorian villas, mansion blocks. St John's Wood is Victorian villas, mansion blocks. Westminster City Council decides the St John's Wood application, and Lord's Cricket Ground anchors the St John's Wood location plan.
• Bordering SW1X: Bayswater (W2) — Victorian stucco terraces defines Bayswater, where victorian stucco terraces set what a drawing package can do. Any Bayswater drawing package is validated by Westminster City Council, with Hyde Park the usual Bayswater reference point on the site plan.
• Bordering SW1X: Paddington (W2) — drawing package work in Paddington means regency terraces, modern apartments. Paddington is Regency and Victorian terraces, canal-side regen. Westminster City Council decides the Paddington application, and Paddington Basin anchors the Paddington location plan.

What local planning policy applies to a drawing package in SW1X?

Conservation areas covering SW1X (Knightsbridge / Belgravia): Westminster City Council runs 56, and Mayfair, Belgravia, Marylebone are the ones SW1X (Knightsbridge / Belgravia) owners meet most. A drawing package inside a SW1X (Knightsbridge / Belgravia) conservation area loses permitted development, so the SW1X (Knightsbridge / Belgravia) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Belgravia a drawing package is judged on the street elevation first.

SW1X (Knightsbridge / Belgravia) and Article 4: Multiple Article 4 Directions — office-to-residential restrictions, HMO conversions, retail to residential in shopping zones. A drawing package planned at a SW1X address is checked against that direction first; Westminster City Council publishes the SW1X (Knightsbridge / Belgravia) extent, and the SW1X line rarely follows the SW1X (Knightsbridge / Belgravia) boundary you would expect.

Digging below a SW1X (Knightsbridge / Belgravia) 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 drawing package in SW1X (Knightsbridge / Belgravia) involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a SW1X (Knightsbridge / Belgravia) dig within 3 m of a neighbour, and Westminster City Council expects the SW1X ground conditions addressed in the application.

What SW1X (Knightsbridge / Belgravia) is built from: 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. That mix decides the drawing package route in SW1X (Knightsbridge / Belgravia) more than the postcode does, and it is what a Westminster City Council case officer reads first. A householder application costs £548 paid to Westminster City Council direct, with 8 weeks to a decision once validated.

Conservation areas covering SW1X (Knightsbridge / Belgravia): RBKC Planning runs 38, and Kensington, Chelsea, Notting Hill are the ones SW1X (Knightsbridge / Belgravia) owners meet most. A drawing package inside a SW1X (Knightsbridge / Belgravia) conservation area loses permitted development, so the SW1X (Knightsbridge / Belgravia) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Holland Park a drawing package is judged on the street elevation first.

SW1X (Knightsbridge / Belgravia) and Article 4: Article 4 Directions covering HMOs, office-to-residential, and basement developments — RBKC has some of the strictest basement policies in London. A drawing package planned at a SW1X address is checked against that direction first; RBKC Planning publishes the SW1X (Knightsbridge / Belgravia) extent, and the SW1X line rarely follows the SW1X (Knightsbridge / Belgravia) boundary you would expect.

Digging below a SW1X (Knightsbridge / Belgravia) property: RBKC's basement policy (post-2015) limits to single-storey under 50% of garden area; double-storey basements effectively prohibited in residential streets. Where a drawing package in SW1X (Knightsbridge / Belgravia) involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a SW1X (Knightsbridge / Belgravia) dig within 3 m of a neighbour, and RBKC Planning expects the SW1X ground conditions addressed in the application.

What SW1X (Knightsbridge / Belgravia) is built from: Grand white stucco Regency and Victorian terraces; red-brick Queen Anne mansions in Kensington; Edwardian mansion blocks; almost no post-war housing stock. Internationally wealthy residents; extensive listed building coverage; heritage and streetscape prioritised in every decision. That mix decides the drawing package route in SW1X (Knightsbridge / Belgravia) more than the postcode does, and it is what a RBKC Planning case officer reads first. A householder application costs £548 paid to RBKC Planning direct, with 8 weeks to a decision once validated.

What happens if a SW1X property sits on a boundary?

• Camden — adjoining SW1X (Knightsbridge / Belgravia), with 40 conservation areas centred on NW1. A drawing package on the far side of the SW1X (Knightsbridge / Belgravia) line is determined by Camden Council, so the SW1X (Knightsbridge / Belgravia) quote for architectural drawings is checked against Camden guidance before it is issued.
• Kensington and Chelsea — the Kensington and Chelsea boundary runs against Westminster, so a drawing package a street from SW1X (Knightsbridge / Belgravia) is decided by RBKC Planning instead. Kensington and Chelsea runs 38 conservation areas across SW1 and its neighbours, which is why architectural drawings priced for SW1X (Knightsbridge / Belgravia) are re-checked against Kensington and Chelsea policy whenever the SW1X (Knightsbridge / Belgravia) address sits on that edge.
• Wandsworth — the Wandsworth boundary runs against Westminster, so a drawing package a street from SW1X (Knightsbridge / Belgravia) is decided by Wandsworth Council instead. Wandsworth runs 45 conservation areas across SW8 and its neighbours, which is why architectural drawings priced for SW1X (Knightsbridge / Belgravia) are re-checked against Wandsworth policy whenever the SW1X (Knightsbridge / Belgravia) address sits on that edge.
• Lambeth — adjoining SW1X (Knightsbridge / Belgravia), with 64 conservation areas centred on SE1. A drawing package on the far side of the SW1X (Knightsbridge / Belgravia) line is determined by Lambeth Council, so the SW1X (Knightsbridge / Belgravia) quote for architectural drawings is checked against Lambeth guidance before it is issued.
• Westminster — adjoining SW1X (Knightsbridge / Belgravia), with 56 conservation areas centred on SW1. A drawing package on the far side of the SW1X (Knightsbridge / Belgravia) line is determined by Westminster City Council, so the SW1X (Knightsbridge / Belgravia) quote for architectural drawings is checked against Westminster guidance before it is issued.
• Hammersmith and Fulham — cross the SW1X (Knightsbridge / Belgravia) boundary and Hammersmith & Fulham Council takes the drawing package instead, applying 45 conservation areas of its own around W6. We re-price architectural drawings at the SW1X (Knightsbridge / Belgravia) edge because Hammersmith and Fulham policy and Kensington and Chelsea policy rarely align on drawing package depth.
• Brent — cross the SW1X (Knightsbridge / Belgravia) boundary and Brent Council takes the drawing package instead, applying 22 conservation areas of its own around NW2. We re-price architectural drawings at the SW1X (Knightsbridge / Belgravia) edge because Brent policy and Kensington and Chelsea policy rarely align on drawing package depth.

Sources for this SW1X drawing package 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.