Where in Westminster does a conservation area application actually get determined?
Westminster is one authority with several borrowed edges. Two of the districts below run across into Camden, and it is the policies map rather than the postcode that decides which council validates your drawings. Fees quoted anywhere on this page are the statutory England rates for 2026, not our estimates for the work.
| Postcode | Area | Dominant stock | What it means for a conservation area application |
|---|
| WC2A | Holborn | Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density | Holborn is split at WC2A. Either Camden Council or Westminster City Council can determine a conservation area application here, so the WC2A address is checked against both policies maps first. |
| NW8 | St John's Wood | Victorian villas, mansion blocks | A conservation area application in St John's Wood may land with Westminster City Council or Camden Council — NW8 crosses the boundary, and the NW8 policies map decides it street by street. |
| SW1A | Whitehall / Buckingham Palace | Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density | Whitehall / Buckingham Palace sits wholly inside SW1A, so Westminster City Council validates every conservation area application submitted from an SW1A address. |
| SW1E | Victoria | Regency terraces, post-war flats | Victoria sits wholly inside SW1E, so Westminster City Council validates every conservation area application submitted from an SW1E address. |
| SW1H | St James's Park | Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density | SW1H covers St James's Park only; Westminster City Council handles the conservation area application. |
| SW1P | Westminster / Vincent Square | Grand Georgian and Regency terraces in Belgravia and Pimlico; Victorian and Edwardian mansion blocks; heritage-rich townhouses throughout; very high listed building density | Westminster / Vincent Square sits wholly inside SW1P, so Westminster City Council validates every conservation area application submitted from an SW1P address. |
| SW1V | Pimlico | Regency terraces, post-war estates | Pimlico sits wholly inside SW1V, so Westminster City Council validates every conservation area application submitted from an SW1V address. |
| SW1W | Belgravia / Victoria | Regency stucco terraces, listed buildings | A conservation area application at an SW1W address in Belgravia / Victoria is determined by Westminster City Council under its own Local Plan policies for Belgravia / Victoria. |
Which Westminster neighbourhoods suit a conservation area application best?
Stucco in Belgravia, brick and Portland stone around Marylebone, mansion blocks along Maida Vale: what an application can achieve shifts with the construction of the building as much as with the designation over it. Forty-four per cent of Westminster’s 132,190 homes were built before 1900, against 20.9% across London (VOA council tax stock data at 31 March 2025), and that ratio is most of the reason.
- Paddington (W2) — a conservation area application in Paddington starts from regency terraces, modern apartments, and Paddington reads as Regency and Victorian terraces, canal-side regen. Modern housing here is usually condition-bound in W2. Westminster City Council assesses Paddington conservation area applications against its own Paddington character guidance, and the location plan we draw for Paddington references Paddington Basin.
- Victoria (SW1E, SW1W) — a conservation area application in Victoria starts from regency terraces, post-war flats, and Victoria reads as Regency terraces, mixed-use. Post-war stock here frequently sits inside an estate layout in SW1E. Westminster City Council assesses Victoria conservation area applications against its own Victoria character guidance, and the location plan we draw for Victoria references Victoria Station.
- Westbourne Green (W2, W9) — a conservation area application in Westbourne Green starts from victorian terraces, mansion blocks, and Westbourne Green reads as Victorian terraces and mansion blocks. Most applications on these Victorian streets are householder applications validated on existing and proposed plans in W2. Westminster City Council assesses Westbourne Green conservation area applications against its own Westbourne Green character guidance, and the location plan we draw for Westbourne Green references Royal Oak.
- Maida Vale (W9) — Edwardian mansion blocks, canal-side defines Maida Vale, where edwardian mansion blocks, victorian villas set what a conservation area application can do. Most applications on these Victorian streets are householder applications validated on existing and proposed plans across W9. Any Maida Vale conservation area application is validated by Westminster City Council, with Little Venice the usual Maida Vale reference point on the site plan.
- Mayfair (W1J, W1K) — conservation area application work in Mayfair means georgian townhouses, listed buildings. Mayfair is Georgian listed townhouses, luxury. Applications on Georgian stock here almost always need a heritage statement alongside the drawings throughout W1J. Westminster City Council decides the Mayfair application, and Berkeley Square anchors the Mayfair location plan.
- Belgravia (SW1X, SW1W) — white stucco Regency terraces defines Belgravia, where regency stucco terraces, listed buildings set what a conservation area application can do. Most applications on these Victorian streets are householder applications validated on existing and proposed plans across SW1X. Any Belgravia conservation area application is validated by Westminster City Council, with Eaton Square the usual Belgravia reference point on the site plan.
- Marylebone (W1U, W1G, W1H) — conservation area application work in Marylebone means georgian terraces, edwardian mansion blocks. Marylebone is Georgian and Victorian terraces, mansion blocks. Applications on Georgian stock here almost always need a heritage statement alongside the drawings throughout W1U. Westminster City Council decides the Marylebone application, and Marylebone High Street anchors the Marylebone location plan.
What local planning policy applies to a conservation area application in Westminster?
Westminster conservation designations: there are 56 across Westminster City Council, St John's Wood, Mayfair, Belgravia among them. Designation costs a Westminster owner the permitted-development route: a conservation area application then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Belgravia is the Westminster designation that most often changes a conservation area application design.
What Article 4 removes near Westminster: Multiple Article 4 Directions — office-to-residential restrictions, HMO conversions, retail to residential in shopping zones. Before pricing a conservation area application we check whether the NW8 address is inside the mapped area, because Westminster City Council draws the Westminster boundary street by street rather than across the whole of Westminster.
Digging below a Westminster 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 conservation area application in Westminster involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a Westminster dig within 3 m of a neighbour, and Westminster City Council expects the NW8 ground conditions addressed in the application.
Westminster 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 conservation area application route in Westminster — construction, not postcode, sets what is achievable.
Who decides a conservation area application on the edge of Westminster?
- City of London — adjoining Westminster, with 27 conservation areas centred on EC1. A conservation area application on the far side of the Westminster line is determined by City of London Corporation, so the Westminster quote for conservation area applications is checked against City of London guidance before it is issued.
- Camden — adjoining Westminster, with 40 conservation areas centred on NW1. A conservation area application on the far side of the Westminster line is determined by Camden Council, so the Westminster quote for conservation area applications is checked against Camden guidance before it is issued.
- Kensington and Chelsea — the Kensington and Chelsea boundary runs against Westminster, so a conservation area application a street from Westminster is decided by RBKC Planning instead. Kensington and Chelsea runs 38 conservation areas across SW1 and its neighbours, which is why conservation area applications priced for Westminster are re-checked against Kensington and Chelsea policy whenever the Westminster address sits on that edge.
- Wandsworth — the Wandsworth boundary runs against Westminster, so a conservation area application a street from Westminster is decided by Wandsworth Council instead. Wandsworth runs 45 conservation areas across SW8 and its neighbours, which is why conservation area applications priced for Westminster are re-checked against Wandsworth policy whenever the Westminster address sits on that edge.
Sources for this Westminster conservation area application 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.
