Basement extension and alterations at 14 Lansdowne Crescent, Kensington, London W11

What was proposed

The application proposed a basement extension, front lightwell extension, rear skylights and fenestration changes, replacement plant, landscaping and an internal lift.

“/PP/26/02003:1 THE ROYAL BOROUGH OF KENSINGTON AND CHELSEA PLANNING APPLICATIONS COMMITTEE 23/06/2026 REPORT BY THE DIRECTOR, PLANNING AND PLACE Application: PP/26/02003 Agenda Item: N028 Address:14 Lansdowne Crescent, LONDON, W11 2NJ Proposal: Extension to basement under main footprint of house and under part of rear garden.”

“4.2The property already benefits from a basement storey which was developed following the granting of planning permission back in 2016 and which is set beneath the eastern side wing as well as partly beneath the front and rear garden areas. The proposed basement that would result in an additional 140sq.m approximately of added floorspace, would therefore and in effect, comprise a lateral extension to the existing single-storey basement.”

Officer report

The site

The property is a large semi-detached Victorian single-family home in the Ladbroke Conservation Area, backing onto a communal listed garden.

“/PP/26/02003:2 2.Reason for committee consideration · Three or more objections were received during the consultation period and the recommendation is to grant. 3.The site and its surroundings 3.1 The proposals relate to a large semi-detached Victorian building that is paired with No. 13 LC to the west and that is located on the southern side of the street - some distance away from its junction with Ladbroke Grove to the east.”

Officer report

Why officers supported it

Officers concluded that the proposal would preserve the building and conservation area, protect neighbours’ living conditions and safeguard structural stability, subject to conditions.

“The overall degree of excavation is therefore justified in this instance and the proposals are acceptable in this regard. 6.9The decisive issues are: iWhether the proposals would preserve or enhance the character or appearance of the conservation area; iiWhether the proposals would continue to ensure good living conditions for those living nearby. iiiWhether the structural stability of the application property and neighbouring buildings would be safeguarded.”

“/PP/26/02003:6 behind the main rear garden. 6.13Overall, the proposals would preserve and/or enhance the character and appearance of the individual building, the group of mews properties of which it forms part and those of the Ladbroke Conservation Area, in line with relevant policies of the Local Plan 2024 including CD1, CD, CD3, CD4, CD7, CD10, CD11 and CD15 accordingly.”

Officer report

Consultation responses

Highways, environmental health and arboricultural officers found the proposal acceptable subject to conditions, while several statutory consultees gave no comments.

“This has been addressed within para 6.8. The proposed equipment including the currently existing unit which the proposals seek to marginally relocate would have an acceptable impact upon the living conditions of the occupiers of nearby properties subject to safeguarding recommended conditions. Statutory consultees ConsulteeComment Where in the report this is considered GLASSNo comments to date received.”

“/PP/26/02003:10 development is acceptable in terms of LP 2024 policy CD6. The Gardens Trust No comments to date received. The proposals would have an acceptable impact upon the rear communal listed gardens.”

Officer report

Who spoke

Steven Ashley addressed the committee in objection to the application.

The committee vote

The committee granted permission by a majority, with Cllr Marshall dissenting.

“Resolved by majority (with Cllr Marshall dissenting): that planning permission be granted with the conditions listed in Section 9 of the committee report.”

Minutes