Overview

Stonecutter is a transformative redevelopment of an entire urban block in the City of London, reimagining a complex corner site at 1 Stonecutter Court and 81 Farringdon Street within the evolving Fleet Street Quarter. Commissioned by La Caisse and PIMCO Prime Real Estate and developed by CO—RE, tp bennett was appointed as lead architect to create a next-generation office building that would respond directly to contemporary workplace needs and post-pandemic office design requirements.

The project’s primary goal was to deliver an exemplary 240,000 sq ft, 13-story office building that would attract business occupiers seeking high-quality, experiential and flexible workspace while setting new standards for sustainable development. The design needed to address the complex challenges of an island site situated in close proximity to the Grade II listed 18th century Hoop & Grapes public house, the Fleet Street conservation area, and strategic viewing restrictions to St. Paul’s Cathedral. Creating a cohesive architectural response to these diverse streetscapes while ensuring the building appealed to a broad range of occupiers was fundamental to the project.

Central to Stonecutter’s ambition was the restoration and enhancement of the surrounding urban realm, contributing positively to the public realm through the creation of a new pocket park with glazed pavilion, relocated courtyard space, and improved accessibility to historic Harp Alley.

The building was designed to support hybrid working patterns with efficient, virtually column-free floor plates, floor-to-ceiling windows maximizing natural light, and multiple roof terraces offering exceptional city views.

Advanced sustainability measures, including the reuse of existing foundations and a fully electric-powered system, were integrated from the outset to achieve the City of London’s ‘Aspirational’ embodied carbon target. The project successfully secured leading international law firm Travers Smith as anchor tenant, with Trainline subsequently taking additional floors, resulting in full occupancy prior to completion in June 2025.

Project Details & Challenges

Stonecutter presented a complex array of design challenges that required innovative solutions across heritage, architectural, and workplace requirements. Most significantly, as one of the first new build office buildings to complete in the City of London designed in direct response to post-pandemic workplace concerns, the project needed to reimagine how office spaces could support hybrid working patterns and employee wellbeing. The interior design strategy focused on creating flexible environments that would address the evolved understanding of workplace needs revealed during COVID-19.

The ground floor was conceived as a dynamic, welcoming environment featuring dual reception areas, coffee bar, townhall space, and art gallery showcasing local emerging artistic talent. The double-height foyer, flooded with daylight and featuring interior planting that blends with exterior greenery, creates long vistas connecting occupiers with the urban landscape, responding directly to increased pandemic awareness of the critical importance of access to nature and natural light for tenant wellbeing. Six roof terraces provide exceptional city views and crucial outdoor amenity space, further prioritising occupier wellness and connection to the external environment.

The design team’s solution drew inspiration from the diamond cutting heritage of adjacent Hatton Garden, incorporating materials and geometries that reflect local character while creating a building that enhances rather than detracts from its historic context. Careful massing studies balanced heritage requirements with commercial needs, maximising lettable floor area while respecting viewing corridors and neighbouring listed buildings. The lightweight structural system with 13.5m x 9m grids enabled virtually column-free floor plates, providing unprecedented flexibility for occupiers while maximizing natural light penetration through floor-to-ceiling windows across all facades.

Beyond addressing heritage constraints, tp bennett leveraged the project to improve the public realm, relocating and enhancing the courtyard space to create better accessibility while adding a pocket park with glazed pavilion. The result is architecture that serves both commercial tenants and the broader neighborhood while celebrating the unique character of this historic quarter.

Key Products 

Overall Project Results

Stonecutter is an exemplar of post-pandemic office design and sustainable development. This is evidenced by the fact that the building achieved full occupancy prior to completion, with leading international law firm Travers Smith signing a 158,000 sq ft pre-let for its new London headquarters, followed by Trainline taking floors two through four totalling 61,500 sq ft in March 2025. This rapid commercial success demonstrates market confidence in tp bennett’s design strategy and approach to post-covid working environments. 

One of the project’s most significant outcomes is its sustainability achievements. Stonecutter is the first office building in the City of London to deliver the ‘Aspirational’ target for as-built embodied carbon, achieving 538kgCO2e/m2 compared to the London Plan benchmark of 950kgCO2e/m2. This represents lower upfront emissions than any other major new build in the City since Life Cycle Carbon Assessments came into force in March 2022. The innovative material specifications, including 40-60% cement replacement in concrete throughout the building and reusing existing foundations to save an estimated 2,600 tonnes of CO2, have created a replicable blueprint for future sustainable construction.

The building also prioritises operational sustainability performance, with a fully electric-powered system, 2,700 square feet of solar panels, and advanced energy conservation methods ensuring Net Zero Carbon operation in alignment with the Paris Climate Agreement. The smart building technology collates data around energy usage, allowing occupiers to monitor and react to their own emissions, supporting tenant sustainability goals.

In terms of design, the building’s standout features extend beyond the office spaces to create a genuine contribution to the local area. The pocket park with glazed pavilion provides much-needed publicly accessible green space along the Farringdon corridor, featuring a coffee shop and restaurant that add vibrancy to the streetscape. The pavilion itself showcases architectural innovation with its diagrid façade and inverted roofscape containing diverse flora, creating an activated garden space that draws visitors into the courtyard.

The interior spaces have been carefully crafted to support the evolving needs of modern workplaces. The elegant timber lattice ceiling in the reception echoes the exterior façade’s geometry, creating design coherence that references the cut stones and gems of nearby Hatton Garden. The super-flexible podium level can transform to support different tenant needs, while the six roof terraces provide exceptional city views and outdoor amenity space that has become increasingly valued in post-pandemic workplace design.

Stonecutter demonstrates that ambitious environmental targets can be achieved while creating commercially successful, architecturally distinctive buildings, evidenced by achieving full occupancy prior to completion. The building’s smart capabilities and dynamic welcome experience create an innovative post-pandemic office environment that supports the evolving needs of modern businesses in a vital part of the city. 

Main Contributors:

Client: La Caisse and PIMCO Prime Real Estate 

Developer: CO—RE

Architect: tp bennett

Structural Engineer: Thornton Tomasetti

Main Contractor: Mace 

LCA Assessor: Thornton Tomasetti

Meet the Design Team

Julian Sharpe – Principal Director

James Elliott – Director

Simon King – Project Director

John Pritchard – Project Director

Teresa Rodriguez – Associate Director

Thomas Cheek – Senior Architect

Erin Copland – Senior Technologist

Danny Leung – Senior Interior Designer

Photography

Hufton+Crow

The post tp bennett Delivers London’s First Post-Pandemic, Net Zero-Ready Office Landmark appeared first on Work Design Magazine.

Overview

Spanning nine floors of Renzo Piano’s 1 Paddington Square, Capital Group’s new London headquarters delivers a transformative working environment perfectly tailored to its needs. 

Architecture and design practice, tp bennett, was set the challenge of creating a transformative working environment that was effortlessly modern and visually striking, while supporting employee wellbeing and embracing a company culture of communication, interaction and collaboration.

The design concept draws on elements from the surrounding location to conceive a kinetic and warm environment.

Undulating forms throughout the interior take inspiration from the reflective ripples created by the Paddington Basin and surrounding waterways: softly-curved timber wall panelling connects the client suite to key amenity spaces; and fluid lighting bends around the circulation spaces to denote the more informal areas for connection and collaboration.

Layout

At the heart of these designs: two central staircases that would seamlessly unite all nine floors. Flowing from the top and bottom levels respectively and meeting in the middle, the staircases had to serve as both stunning centrepieces of the new environment and effective conduits for workplace interaction. An emphasis on flexibility and wellbeing, particularly post-Covid, created a space that can cater for a variety of needs and scenarios simultaneously. Strong early engagement with the client refined this dynamic approach to deliver a range of workspace configurations, social amenities and enriching environments. 

An enhanced social offer is located in the centre of the stack, where the two staircases meet, and acts as a natural convergence point for the entire office: this is where café, games area and wellness studios are located – contemplation rooms, a parenting suite, library, medical suite, tech-free recharge studio and ‘outside-in’ space which use biophilia to connect users with nature all contribute to a dedicated focus on employee experience and wellness. 

Moving down through the space, each floor shares a common design language but with subtle variations to support wayfinding and denote usage. Level 11 is set up as the heart of Capital Group’s headquarters, situated at the meeting point between the two central staircases. As the natural convergence point for the entire office, this level comprises numerous social spaces and amenities, as well as the client suite, featuring a warm-toned metallic feature ceiling and a bespoke chandelier which links the reception area to the multi-tiered auditorium. In an unusual move for an auditorium, the space celebrates access to natural light afforded by full-height glazing, orientating the viewers towards the immersive open backdrop overlooking sweeping views of central London.

Future-Proofing

From the earliest concepts, this project placed an emphasis on long-term adaptability. Capital Group’s dynamic mindset called for workspaces that could flex quickly and simply to accommodate different job types and head counts. 

The cellular spaces on the upper floors were designed to have open pockets initially that could then be infilled with spaces where needed, when needed. As well as the work areas, amenities and social spaces also come with built-in flexibility that enables them to be modified as usage and preferences evolve.

Project Details & Challenges

Capital Group and tp bennett assembled a design committee  that included representation from across all areas of the business, to ensure the final space was tailored down to the final detail. The committee reviewed key decisions throughout the design process, from spatial planning to furniture selection, including several bespoke items.

Special attention was paid to several bespoke artistic commissions intended to subtly integrate different spaces, aiming to inspire movement. For example: as the visitor enters the building, a specially designed self-supporting chandelier, made from brass and acrylic, marks the transition through the reception into the executive lounge and bar area subtly welcoming the guest into the workspace. Throughout the project there are also newly commissioned works of art from local artists, continually linking the immediate office space into the broader context of Paddington, rooting the visitor in a broader sense of place.

Health & Wellbeing

Employee wellbeing assumed a fundamental role in the creation of Capital Group’s new office, not just in terms of amenities but also the particular details of its finishes, lighting and biodiversity. Tp bennett has crafted an array of different wellness spaces spread across the nine floors, allowing occupants to select which environment suited them best. These include contemplation rooms, ‘outside-in’ spaces, a yoga studio, libraries, tech-free recharge zones and peaceful outdoor terraces. Dedicated parenting and medical suites meanwhile offer support for associates’ childcare and healthcare needs.

The libraries, as one example, provide quieter areas with gentler lighting and finishes. Crucially, the design team was not given any space restrictions when developing the wellbeing spaces, which were given equal priority within the overall floorplans. In contrast to many offices, these amenities were not hidden away in the basement or tacked on as afterthoughts; they occupy prime positions on their respective floors. Post-occupancy, several visitors have complimented the notable prominence and natural lighting of the wellness areas.

Materiality & Furnishing

From the outset of this project, the team adopted a long-term approach to design, delivery and material specification. Exceptional time and resource was committed to exhaustive lifecycle cost analysis plans, which underpinned every design decision taken. 

Capital Group’s new HQ benefited immensely from ADLib, tp bennett’s in-house responsible sourcing platform that specified each material deployed on the project. The system has an established track record on previous schemes, with its operators continually refining how to maximise its effectiveness. ADLib screens materials against a broad spectrum of attributes, from reliability and durability to embodied carbon and human rights records. For 1 Paddington Square it ruled out numerous suggested materials, ensuring only those of the highest quality were selected based on rigorous, objective analysis.

A dedicated and constantly updated onsite sample room helped assess the quality of every finish.

This approach also enabled the client to see how the interiors would come together, reducing the likelihood of costly and wasteful revisions post-completion. Intensive workshopping set out the modularity of each workspace, identifying waste and producing a knowledge bank to support long-term maintenance. The feature timber wall panelling, for example, was developed in modules to boost durability but also to simplify potential removal, repair and relocation.

Key Products 

• Glazed partitioning – Radii
• Office furniture and workstations – Knoll
• General Office Carpet – Shaw
• Acoustic panels – Kvadrat
• Timber flooring – Hakwood
• Ironmongery – Franchi
• Ceiling tiles – SAS
• Tiles – Domus
• Stone – Arena
• Feature staircase- Leytons

Tech Solutions

• Onsite twin-core UPS
• Multi-vendor Distributed Antenna System (DAS) to boost the signal of all four mobile networks in the building
• Outward facing auditorium with onsite broadcast and presentation technology
• LED lighting, daylight and occupancy sensors, ENERGY STAR-rated appliances and water-efficient fittings offer long-term reductions to the offices’ carbon footprint
• ‘Live trading lounge’ provides constant feed to other Capital Group offices. Enabling associates to walk up and talk to colleagues elsewhere for more incidental interactions
• Cloud-based Building Management System

Overall Project Results

Tp bennett set out to create a future-focused, perfectly tailored space that would fundamentally transform how the Capital Group’s team felt about coming into work. Comprehensive engagement with various stakeholders was essential for managing cultural change as Capital Group transitioned to the new space. This close consultation with the client allowed tp bennett to strike a balance in its designs between the traditional and progressive, creating a workspace that emphasizes connectivity and wellbeing.

Now that the Capital Group is using 1 Paddington Square, several steps have been taken to monitor and evidence the success of the project. Surveys were carried out throughout the company, offering several positive insights: associates express how much more they enjoy coming into work and note a growth in productivity, health and wellbeing. Feedback from visitors has been equally positive, underpinned by the increased accessible spaces allowing the company to host more guests, clients and industry events that ever before.

Main Contributors:

Interior Design: tp bennett

Project Manager: CBRE

Quantity Surveyor: CBRE

M&E Engineer: ChapmanBDSP

Structural Engineer: WSP

Technology Consultant: Mix Consultancy

Sustainability Consultant: WSP

Contractor: Overbury PLC

Agent: JLL

Meet the Design Team

Tajal Rutherford-Bhatt – Project & Design Lead

Julian Sharpe – Landlord Liaison  & Engagement 

Rachael Winsor – Design 

Andrew Tapsell – Technical

Photography

Hufton + Crow

The post Come Inside Capital Group’s new London HQ in Paddington Basin appeared first on Work Design Magazine.