Basement and roof extension at 95 Lansdowne Road, Kensington, London W11

The site and its setting

The property is a three-storey Victorian terrace building within the Ladbroke Conservation Area, backing onto a registered listed communal garden.

“3.The site and its surroundings 3.1 The property is a three-storey (over lower ground floor level) mid terrace Victorian building, which is sited on the northern side of Lansdowne Road, backing onto a designated communal registered listed garden. 3.2The property is not listed but lies within the Ladbroke Conservation Area.”

Officer report

Flooding and drainage

The assessment identified surface water and drainage exceedance risks but proposed pumped drainage, SuDS and permeable paving to reduce flooding impacts.

“2.2The submitted Flood Risk Assessment has considered the risk of flooding from all sources and has identified that there is a risk of surface water flooding and a risk from drainage exceedance to the property. The surface water flood risk has been considered in detail based on site observations as well as a thorough review of the site’s topography in Section 7 of the report.”

“2.9Overall, the submitted Flood Risk Assessment has provided a detailed assessment of the risk of flooding to the property, has noted the existing flood risks and has identified mitigation measures to account for these risks. This is in line with the National Planning Policy Framework, London Plan Policy SI 12 and Local Plan Policy GB11.”

Officer report

Concerns about flooding

Objectors said the basement could redirect groundwater or surface water towards neighbouring properties, while officers considered the submitted investigations and mitigation adequate.

“The submitted Flood Risk Assessment has considered the risk of flooding from all sources and has identified that there is a risk of surface water flooding and a risk from drainage exceedance to the property. It is noted that the primary mechanism for flooding in the area is through thesewer network, which would be mitigated for by: ·protecting the new basement from flooding; and ·reducing the rate at which Surface water enters the local sewer network.”

Officer report

Speakers at the meeting

No speakers addressed the committee.

Committee discussion

The committee considered an addendum addressing further representations, agent comments and changes to several conditions, including flooding measures.

“Alice Culver introduced the report and drew attention to the addendum report that included: an additional objection, the re-circulation of a letter from Cllr Petit, an additional response from the agent to representations, amendments to Conditions 8, 10 and 15 and, an amendment to Informative 4 and paragraph 6.28.”

Minutes

The vote

Permission was granted by a majority, with one councillor voting against and one abstaining.

“Resolved by a majority (with Cllr Verboven dissenting and Cllr Areti abstaining): that planning permission be granted with the conditions in section 9 of the officer report.”

Minutes