Bayswater audit adopted 13 July 2000Read the Bayswater conservation area audit
Lancaster Gate has no conservation area of its own: it lies within the Bayswater conservation area, whose audit Westminster adopted as Supplementary Planning Guidance on 13 July 2000 and still lists among its audits. The audit judges the sequence of spaces from Cleveland Square to Lancaster Gate one of the most distinctive in the whole conservation area, and finds views along Lancaster Gate particularly strong where roof lines survive largely unbroken.
Bayswater conservation area audit SPG, adopted 13 July 2000 · Westminster: Bayswater conservation area mini guide · Westminster: conservation area audits, maps and guidance A–K · Westminster: conservation area audits, maps and guidance L–Z
Because the audit cites planning policies that have since been superseded, Westminster asks for adopted audits to be read with its current framework, so test its advice against City Plan Policies 44 and 45. Its roof analysis finds that the many listed buildings have held back piecemeal additions, leaving very little scope for roof extension in either the high roads or the mews, and it warns that repaving a privately owned mews may require the council’s consent.
Bayswater conservation area audit SPG, adopted 13 July 2000 · Westminster: conservation area audits, maps and guidance A–K · City Plan 2019–2040 (2026), adopted 21 January 2026
Basement direction in force 31 July 2016Check the Article 4 position for the address
Westminster’s basement direction was made on 22 July 2015, confirmed on 4 July 2016 and brought into force on 31 July 2016 across the entire city. Under it, householder permitted development no longer extends to basements, lightwells or other development below a house or its curtilage, so creating new space beneath a Lancaster Gate house needs a planning application.
Westminster: Article 4 directions and address map · Westminster: city-wide basement Article 4 direction, confirmed July 2016
Westminster lists no conservation-area minor-alteration direction at Lancaster Gate. Its change-of-use directions, which remove the right to turn commercial, business and service premises into homes in mapped parts of the city, concern those premises and not work inside an existing home. Whatever the Article 4 map shows, listing, the conservation area and the lease continue to apply, and flats never had householder rights.
Westminster: Article 4 directions and address map · Westminster: permitted development rights · Historic England: listed-building consent · LEASE: alterations and home improvements
City Plan adopted 21 January 2026Read the City Plan 2026; no neighbourhood plan applies
Applications here are decided against the City Plan 2019–2040 (2026), adopted on 21 January 2026, alongside the London Plan. Policy 45E accepts roof extensions in principle where heritage assets are not harmed, and looks for a coordinated approach where a terrace’s roofline is unimpaired; paragraph 45.11 adds that upward extension will usually be inappropriate where a mansard or other later roof extension already exists. The list entries describe attic or slate mansards at Nos 1 to 9, 10 to 22 and 75 to 89.
Westminster: adopted planning policies and made neighbourhood plans · City Plan 2019–2040 (2026), adopted 21 January 2026 · Historic England: 1 to 9 Lancaster Gate, Grade II · Historic England: 10 to 22 Lancaster Gate, Grade II · Historic England: 75 to 89 Lancaster Gate, Grade II
On the council’s designation map, Lancaster Gate falls within the South East Bayswater neighbourhood area, designated on 10 January 2014 on the application of the South East Bayswater Residents’ Association; check the map for the address. Westminster lists no forum for that area, and no neighbourhood plan covers Lancaster Gate. Preparation of a New City Plan started with a notice of intention in July 2026, but it remains emerging rather than adopted policy.
Westminster: South East Bayswater neighbourhood area designation notice, 10 January 2014 · Westminster: designated neighbourhood forums · Westminster: adopted planning policies and made neighbourhood plans · Westminster: New City Plan (emerging, not adopted)
Policy 50; construction code May 2026Keep a basement refit apart from new basement space
Fitting out an existing basement, such as the basement storey Historic England records at Nos 1 to 9, as a bathroom or utility room is one kind of brief; deepening it, excavating beneath the garden or cutting a new lightwell is quite another. Policy 50 supports new basement space that stays within one storey of the lowest original floor, occupies no more than half the garden, keeps at least 1 m of soil on top and leaves an undeveloped margin around the site boundary.
Historic England: 1 to 9 Lancaster Gate, Grade II · City Plan 2019–2040 (2026), adopted 21 January 2026
For listed buildings, Policy 50 adds that a basement must not unbalance the original hierarchy of spaces. Westminster’s May 2026 Code of Construction Practice places every new or extended basement, large or small, at Level 3, which brings the duty to prepare a Construction Management Plan. On Historic England’s 2017 map, the Tier 2 priority area tracing the approximate line of the Roman road along Bayswater Road widens between Edgware Road and Lancaster Gate; check the address, because groundwork applications inside it need a desk-based assessment.
City Plan 2019–2040 (2026), adopted 21 January 2026 · Westminster Code of Construction Practice, May 2026 · Historic England: City of Westminster Archaeological Priority Areas appraisal, March 2017
Settle the consent route for a Lancaster Gate address before windows are ordered, a mansard is touched or any digging is planned. Planning permission, listed building consent and conservation-area control are separate from one another, and separate again from the basement Article 4 direction, Building Regulations, the landlord’s rights under the lease and the Party Wall Act. Clearing one does not clear the rest, and guidance in the audit is advice, not a decision.
Westminster: Article 4 directions and address map · Westminster: city-wide basement Article 4 direction, confirmed July 2016 · Historic England: listed-building consent · Westminster: conservation areas and audits · When Building Regulations approval is needed · LEASE: alterations and home improvements · Party-wall work requiring notice