74 Thurlow Hill London Lambeth SE21 8JN

1. 1.The submitted Basement Impact Assessment has not been prepared by a suitably qualified or competent professional and contains inaccuracies. As such, the Local Planning Authority cannot be satisfied that the assessment is robust or that the potential impacts of the development have been adequately assessed. Insufficient information has therefore been provided to demonstrate that the proposal would not result in harm to land stability, hydrology, or neighbouring properties, contrary to policy Q27 of the Lambeth Local Plan (2021)
2. 2.By reason of the scale and siting of the proposed basement extension and lightwells, the proposal would London planning@lambeth.gov.uk SW2 9QQ result in overly large and visually intrusive features that would fail to preserve the character and appearance of the host building and surrounding area, contrary to Policies Q5, Q11 and Q27 of the Lambeth Local Plan (2021). In addition, insufficient evidence has been submitted to demonstrate that the proposal would not result in the loss of a significant proportion of the rear garden, such that at least 70% would not be retained in a natural, undeveloped state at its original ground level, contrary to policy Q27(iv) of the Lambeth Local Plan (2021).

From the council's decision notice.

Postcode

SE21 8JN

Date validated

2 January 2026