IN Brief:
- The two developments will provide a combined 169,300 sq ft of commercial and hospitality accommodation.
- The programme combines refurbishment, listed-building work, office retrofit, retail, and public-realm coordination.
- Both schemes form part of the Crown Estate’s largest development pipeline to date.
The Crown Estate has unveiled plans for two West End developments that will deliver a combined 169,300 sq ft of office, retail, and hospitality space at 10 Piccadilly and 21–29 Glasshouse Street.
Forming the latest phase of the organisation’s largest development pipeline to date, both schemes sit within its 10 million sq ft London portfolio. Each combines commercial redevelopment with the retention and upgrading of existing buildings in one of the capital’s most constrained and heavily used districts.
At 10 Piccadilly, the Crown Estate is proposing a 90,800 sq ft mixed-use refurbishment of the Grade II-listed building completing the Regent Street curve at Piccadilly Circus. Originally built as the Swan & Edgar department store, the property later housed Tower Records.
The completed development is expected to provide 62,700 sq ft of office accommodation, a 26,400 sq ft hospitality destination extending across the basement, ground, and first floors, and a further 1,700 sq ft of Regent Street retail space.
At 21–29 Glasshouse Street, two existing office buildings will be combined into a single commercial development containing 63,000 sq ft of workplace accommodation. Larger floorplates, upgraded interiors, a new rooftop space, and an enhanced reception will be accompanied by 15,500 sq ft of retail accommodation at basement and ground-floor levels.
Both projects are being coordinated with proposed public-realm improvements across Regent Street, Haymarket, and Piccadilly Circus. Building entrances, servicing, pedestrian routes, traffic arrangements, utilities, and temporary works will therefore have to be planned alongside the wider street environment.
Retrofit carries complex delivery interfaces
Retaining and adapting the existing buildings reflects changing carbon priorities and development economics in central London. Prime offices continue to attract investment, although occupiers and funders increasingly expect strong operational performance, high-quality amenities, resilient services, and evidence that embodied carbon has been considered alongside energy use.
At 10 Piccadilly, the Crown Estate is targeting NABERS 5 Star, WELL Platinum, BREEAM Outstanding, WiredScore Platinum, and EPC A. Its wider pipeline is also working towards an embodied-carbon target of 400kg per sq m, placing substantial emphasis on retention, material choice, structural intervention, and the carbon cost of replacement.
Heritage-led retrofit remains a demanding construction exercise because existing structures must be surveyed and tested before designers can confirm capacity. Hidden conditions frequently emerge after opening-up work begins, while floor strengthening, façade retention, fire performance, acoustic separation, vertical transport, and modern building services all need to be integrated without eroding the elements that justify retention.
Comparable constraints are shaping the planned refurbishment of the Lloyd’s Register estate, where historic fabric, commercial performance, and extensive services upgrades must be reconciled within a dense London setting.
At Piccadilly Circus, construction logistics will be particularly demanding because deliveries, waste removal, crane operations, scaffold, hoarding, workforce access, and temporary pedestrian arrangements must coexist with retail, hospitality, offices, tourism, public transport, and neighbouring projects.
The combination of hospitality and office uses creates further technical interfaces. Commercial kitchens, extract systems, acoustic treatment, odour control, fire separation, servicing, and extended operating hours must be accommodated alongside workplace floors above and around them.
Combining the Glasshouse Street buildings should create more efficient floorplates, though it will require close analysis of structural levels, cores, circulation, fire strategy, and servicing. Rooftop additions and plant may introduce reinforcement requirements that only become clear after detailed surveys.
Retained façades and structures can also restrict the routes available for new mechanical and electrical services. Risers, ducts, cable routes, plant replacement, and maintenance access must be fitted around heritage fabric and existing geometry, often requiring more bespoke coordination than a new-build scheme.
Tenant fit-out will influence the eventual operational performance, particularly where base-build systems are designed around ambitious energy targets. Controls, metering, ventilation, lighting, and equipment loads must remain aligned through occupation rather than being undermined by later alterations.
Commissioning and post-occupancy tuning will therefore be central to whether the schemes achieve their design intent. High-performing refurbished offices depend on the interaction between building fabric, services, controls, tenant behaviour, and facilities management, rather than certification at practical completion alone.
The projects follow the Crown Estate’s nearby One Hanover Street redevelopment and earlier schemes at New Zealand House, 10 Spring Gardens, and 33–35 Piccadilly. Treating the work as a sustained pipeline should allow lessons on logistics, retained fabric, supply-chain capacity, and operational performance to transfer from one West End asset to the next.
