Westminster Council has approved plans for an extension and alterations to the One Stanhope Gate office building in Mayfair.

Lothbury Investment Management Limited, on behalf of Lothbury Property Trust, is planning to add two additional floors to the building, along with a new rooftop terrace, façade alterations and internal reconfiguration of the ground floor and the cores, in order to update the building for the next stage of its life.

An additional seventh floor is being built for the building services. This has been designed so that it is not visible from any street-level views and occupies the minimum space required.

One Stanhope Gate will comprise 35,750 sq ft across six floors of Grade A office accommodation, increased from 32,850 sq ft.

Mark O’Mullane, Director at Lothbury Investment Management Limited, commented: “As well as being a highly desirable building in an unrivalled Mayfair location, One Stanhope Gate was the first direct development by Lothbury Property Trust back in 1999. The planning consent is in line with the fund strategy of repurposing prime assets to add value and respond to modern occupier requirements.

A major refurbishment and extension will enable us to enhance the value and liquidity of this prime asset, improving its sustainability credentials to achieve a BREAAM Excellent rating once complete.”

Des Curran, director of MCa, the architect, added: “Materials have been selected carefully to ensure visual cohesion with the surrounding buildings”.

Westminster Council ref. no. 20/08143/FULL.