26/00351/FULL

Status: Pending
Application Details
Description

Internal alterations to 38 Portland Place throughout to change the use from sui generis (Institutional Use) to Class E office use throughout in connection with removal of link building between 38 Portland Place and 9 Cavendish Mews North at ground, first and second floors, formation of a new rear stair core to main building and new external fire escape stair. New terraces to office space in connection with plant space and the installation of air source heat pumps. Alterations to the front and rear facades of the mews building in connection with internal alterations to create new residential units and new plant space to mews roof level and new terrace spaces all in connection with the change of use of ground to first floors from sui generis (institutional use) and second floor Class E (office use) of 9 Cavendish Mews North to Class C3 residential use to form 3x 1 bedroom flats. (Part of a land swap with 1 Marylebone High Street and Moxon House). (Linked to 26/00352/LBC)

Council

Westminster

Application Type

Full Planning Permission Application

Date Received

21 Jan 2026

Date Validated

21 Jan 2026

Location
Address

Abercorn School 38 Portland Place London W1B 1LS

Postcode

W1B 1LS

Coordinates

51.520094800000000, -0.144533100000000

Source: Application UPRN

Quick Info
UID
26/00351/FULL
Reference
26/00351/FULL
Status
Pending
Last Updated
25 May 2026