Willmott Dixon Pushes £40m Princes Exchange to EPC A with Full Envelope Retrofit

Willmott Dixon will overhaul Princes Exchange, an eight-storey glass building next to Leeds City Station, in a £40 million project procured by Network Rail through the SCAPE Construction framework. The refurbishment centers on a complete replacement of the existing glazed façade and a new roof, designed to lift the building's Energy Performance Certificate rating from D to A—a jump rarely achieved in commercial retrofit projects of this scale.

The contractor will install new flexible mechanical, electrical, and plumbing (MEP) systems alongside an internal fit-out across all eight storeys. The project, delivered in partnership with rail-regeneration specialist Platform4, is scheduled to open in summer 2027. Upon completion, the building will consolidate track and train operations staff in Leeds into a single workspace, with energy efficiency, sustainability, and digital connectivity forming the core design brief.

What sustainability certifications will Princes Exchange achieve?

Princes Exchange is designed to meet BREEAM Excellent standards, Fitwell certification, and WiredScore recognition. BREEAM Excellent requires stringent performance thresholds across energy, water, materials, and indoor environmental quality. Fitwell certification, developed by the Centers for Disease Control and Prevention and the General Services Administration in the United States, assesses building design's impact on occupant health and wellbeing. WiredScore certification benchmarks digital infrastructure, recognizing buildings with best-in-class connectivity—a critical consideration for office environments reliant on data-intensive rail operations.

The simultaneous pursuit of three internationally recognized standards signals a strategic alignment with tenant demand for low-carbon, digitally resilient Grade A workspace. Commercial occupiers increasingly require verifiable sustainability credentials to meet their own corporate reporting obligations under frameworks such as the Task Force on Climate-related Financial Disclosures (TCFD) and emerging ESG disclosure mandates.

How much embodied carbon will the project save through reuse?

Willmott Dixon expects to save approximately 80 tonnes of embodied carbon by reusing furniture and materials from the site. The contractor will donate £10,000 worth of equipment to local charities, diverting items from landfill and extending their service life. While 80 tonnes represents a modest fraction of total project emissions, the figure underscores the growing role of circular economy practices in commercial refurbishment.

Embodied carbon—emissions associated with material extraction, manufacturing, transport, and disposal—accounts for roughly 11 percent of global carbon emissions, with building construction responsible for the majority. Refurbishment projects inherently carry lower embodied carbon than new-build alternatives, as the structural frame and core remain intact. However, façade replacement and MEP upgrades still introduce significant material quantities. The decision to reuse furniture and salvage fixtures reflects a pragmatic approach to urban mining, extracting value from assets already on site rather than sourcing new products.

What role does the full envelope replacement play in the EPC upgrade?

The replacement of the entire glazed façade and installation of a new roof are the primary levers for achieving the EPC rating improvement from D to A. The existing envelope evidently suffered from thermal bridging, outdated glazing specifications, and air leakage—common pathologies in commercial buildings constructed before stringent energy regulations took effect. A full envelope retrofit allows the design team to integrate contemporary U-value performance, airtightness detailing, and solar control glazing optimized for Leeds' latitude.

Achieving an EPC A rating in a refurbishment context requires operational energy demand below approximately 25 kWh/m² per year, depending on building use and floor area. The new envelope, combined with efficient MEP systems, positions Princes Exchange well within this threshold. The project illustrates a broader trend: landlords and public-sector clients are increasingly investing in deep energy retrofits to future-proof assets against tightening Minimum Energy Efficiency Standards (MEES) and tenant expectations.

Who are the key delivery partners and what frameworks govern the project?

Network Rail procured Willmott Dixon through the SCAPE Construction framework, a publicly available procurement route used by public-sector bodies across the UK. SCAPE enables early contractor engagement, allowing Willmott Dixon to provide strategic input during design development—an approach that can compress programme durations and identify value-engineering opportunities before construction begins.

Platform4, Network Rail's property development company, acts as the development partner. Platform4 was established to unlock value from rail-adjacent land and buildings, with a dual mandate: generate revenue to reinvest in rail infrastructure and deliver wider public benefit through regeneration. Andrew Ferguson, Platform4's interim chief executive, noted that the project "unlock[s] critical land, enabling rail growth in Leeds." The reference to land unlocking suggests that consolidating Network Rail's Leeds operations into Princes Exchange may free up other sites for future rail expansion or mixed-use development.

Mark Robinson, Group Chief Executive at SCAPE, described the project as "currently Network Rail's largest project commission through the SCAPE Construction Framework," highlighting the scale and strategic importance of the retrofit within Network Rail's broader estate strategy.

What local economic and community commitments accompany the project?

Willmott Dixon will deliver apprenticeships, work experience placements, educational activities, and support for community projects as part of the project's social value obligations. These commitments align with the Social Value Act 2012, which requires public-sector commissioners in England to consider economic, social, and environmental wellbeing in procurement decisions. SCAPE framework contracts typically embed measurable social value Key Performance Indicators (KPIs), including local labour hours, apprenticeship starts, and engagement with small and medium-sized enterprises (SMEs).

Anthony Dillon, Managing Director for Willmott Dixon in the North, emphasized the firm's regional presence: "With our regional office in Morley, we're proud to be working on a local landmark project that supports Network Rail's ambition for a sustainable workplace that will benefit the rail industry for many years to come." Morley lies approximately seven miles southwest of Leeds city centre, positioning Willmott Dixon's supply chain and workforce within close proximity to the site.

How does this project fit within Willmott Dixon's wider regeneration portfolio?

Princes Exchange forms part of a growing pipeline of urban regeneration schemes delivered by Willmott Dixon across the UK. The contractor is currently on site delivering a £32 million Grade A tech hub in Doncaster and was recently appointed to The Stage in Luton, a £114 million town-centre scheme comprising 292 apartments, including 84 affordable homes. The firm also completed the £115 million Stockport Interchange, which includes 196 apartments and a new bus interchange.

This portfolio reflects a strategic focus on mixed-use, transit-oriented development in secondary cities—locations where public investment in transport infrastructure creates conditions for commercial and residential densification. Transit-oriented schemes benefit from proximity to rail or bus networks, reducing car dependency and aligning with net-zero transport policies. The colocation of workspace and transport hubs also supports modal shift objectives, encouraging rail commuting and reducing Scope 3 emissions associated with business travel.

What are the implications for commercial retrofit standards in the UK?

The Princes Exchange project demonstrates that deep energy retrofits achieving EPC A ratings are technically and financially viable for commercial buildings, particularly when driven by public-sector clients with long-term asset-holding strategies. However, the £40 million investment—approximately £5 million per storey—underscores the capital intensity required for such upgrades. Private landlords with shorter investment horizons may struggle to justify similar expenditure without regulatory compulsion or tenant incentives.

The UK government's trajectory toward stricter MEES thresholds for commercial property—potentially requiring EPC B ratings by 2030—will likely accelerate demand for full-envelope retrofits. Princes Exchange offers a replicable template: complete façade replacement, integrated MEP renewal, and pursuit of multiple certification standards to enhance tenant appeal and asset value. For procurement professionals and sustainability managers in public-sector organizations, the project illustrates how framework contracts can facilitate early contractor collaboration, compressing risk and enabling holistic sustainability outcomes.

Andrew Banks, Network Rail's finance director, framed the project as both operational necessity and asset strategy: "We're proud to be providing upgraded space for Network Rail and train operator colleagues to support them to deliver great service for rail passengers in the north, while opening up this iconic property to the wider market." The dual emphasis on operational efficiency and commercial lettability reflects the financial pressures facing public-sector landlords, who must balance service delivery with portfolio optimization.

For the UK construction materials sector, projects of this scale drive demand for high-performance glazing systems, low-carbon insulation, and digitally integrated MEP components. The full envelope replacement creates opportunities for manufacturers offering thermally broken curtain-walling, triple-glazed unitized façades, and prefabricated MEP modules. As retrofit volumes grow, supply-chain capacity in these product categories will become a critical constraint—and a competitive differentiator for contractors able to secure preferential terms with specialist subcontractors.