7 October 2025
29 Gloucester Place goes to market as the first fully inclusive design led workspace in the Estate’s London portfolio | 7,855 sq ft of prime flexible office space in the heart of Marylebone
The Portman Estate today unveils Portman WorkWell, a new to market premium flex office offer, with the launch of 29 Gloucester Place, the first in a network of fully inclusive, design-led workspaces across the 110-acre Estate in London’s West End.
Portman WorkWell responds directly to the shift in workplace culture, where demand for agility, shorter leases, and turnkey accommodation has transformed the West End into a hub for creative studios, hybrid-ready environments, and future-facing businesses. With fully fitted offices, dedicated meeting rooms and ESG- led occupier amenity, Portman WorkWell meets the evolving expectations of SMEs and founder-led firms.
Set within two beautifully restored 18th century Grade II listed Georgian buildings in the heart of Marylebone, 29 Gloucester Place redefines flexible workspace and exemplifies The Portman Estate’s forward-thinking approach to sustainability and hybrid working. The freshly refurbished address provides 7,855 sq ft of prime Cat A+ flexible, all-inclusive office space, with 11 fully fitted office spaces which vary in size from 268 sq ft to 892 sq ft, across basement, ground and first to fourth floors.
The refurbishment of the building, described by Historic England as part of one of the most extensive and intact sequences of Georgian terraced houses in London, has been thoughtfully designed by Garnett Architecture. Retaining the original heritage features and charm from fanlights to cornicing, each office offers natural light from floor to ceiling windows or restored lightwells and has access to two terraces. This exceptional central London address is just five minutes from Marble Arch, and Bond Street underground stations, and 15 minutes’ walk from both Regents Park and Hyde Park.
29 Gloucester Place aligns with The Portman Estate’s commitment to placing sustainability at its core with the property equipped with air source heat pumps, sensor controlled lighting and double and secondary glazing, all ensuring greater energy efficiencies and reduced operational carbon emissions will be achieved and an Energy Performance Rating of B.
The property is located opposite the new open-air 27,200 sq ft courtyard Loxton Walk, due to open in early 2026, offering future occupiers of 29 Gloucester Place a new vibrant retail and leisure offer right on the doorstep. Brands that will be joining this new retail destination include Melrose & Morgan, Matchado, Notto and Atis. It’s also conveniently located close by to the independent retail streets of Portman Marylebone, including New Quebec Street, Seymour Place and Chiltern Street.
Chris Dunlop, Director – Head of Commercial Property, The Portman Estate said: “With Portman WorkWell, we are responding to the continued growth in demand for flexible office space. The Portman WorkWell product matches occupiers’ demand for autonomous fitted space with the right balance of service and amenity. This is a major moment for our office portfolio, following on from the recent successful letting of One Great Cumberland Place, our flagship retrofitted Marylebone office development. Adding the Portman WorkWell offering to our portfolio further cements our commitment to managing best in class office space across the West End.”
Each Portman WorkWell space is fully fitted and ready to move in, with flexible terms and inclusive pricing that covers business rates, service charges, utilities and high-speed WiFi making it desirable for businesses seeking out a simple, stylish, hassle-free solution.
All Portman WorkWell office occupiers will have access to a special membership rate at the business led clubspace The Orchard at One Great Cumberland Place. The Orchard is an excellent new amenity for businesses across the neighbourhood to connect and collaborate with outstanding views across Hyde Park.
Whether a startup, scale-up, or established team, Portman WorkWell offers a seamless solution – combining flexibility, hospitality, and a sense of home in one of London’s most sought-after neighbourhoods.
Joseph Mishon, Head of Flexible and Managed Workspace at Colliers adds: “Portman WorkWell is an innovative new platform which will re-define workspace across one of London’s great Estates. It is an excellent new addition to the capital’s flex space market. These flex spaces provide dynamic businesses across all sectors from tech to creative and from finance to digital with attractive, well-appointed workspace that not only improves staff retention through a collaborative and sociable set up but also delivers the right prime central London address.”
Imogen Purvis at Associate Partner at RX London adds: “29 Gloucester Place sets a new benchmark for premium flex space in Marylebone. Businesses are increasingly seeking a simple, all-inclusive offer that combines design, heritage, and convenience and Portman WorkWell delivers exactly that. With the added benefit of Loxton Walk opening nearby in 2026, this will bring vibrant new retail and leisure to the doorstep, this is a truly compelling opportunity for ambitious SMEs and established firms alike, and we very much look forward to welcoming them to the Estate.”
Managed workspace operator RE-DEFINED – a MAPP company – is leading the management of 29 Gloucester Place, providing a seamless and curated occupier experience and day-to-day support.
Now available: 29 Gloucester Place, Marylebone – Colliers and RX London are the appointed agents. For further details please visit www.portmanworkwell.co.uk
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