Global Consultancy for the Built Environment

De Leeuw International combines specialist professional expertise with digital intelligence, AI-enabled solutions and integrated technology to improve how projects, assets and infrastructure are planned, designed, tendered, built and managed.

Our services connect people, processes, data and technology to provide greater visibility, stronger governance, improved decision-making and measurable outcomes across the asset lifecycle.

Development & Infrastructure Advisory

Supporting better decisions from strategy to delivery.

Strategic, commercial, technical and digital advisory supporting major developments, infrastructure programmes and capital investments.

Project Management Consulting

Delivering greater certainty across complex projects.

Integrated project and programme management supported by AI-enabled project controls, predictive insights, intelligent reporting and digital portfolio intelligence.

Cost & Commercial Intelligence

Turning project cost data into commercial intelligence.

Independent cost consultancy driven by digital workflows, analytics and AI-enabled forecasting and decision support.

Design Management Office

Connecting design, data and delivery.

Integrated design management supporting coordinated, efficient and informed design decisions from concept through construction and into operations.

Integrated Digital Services

Connecting data, Technology and Intelligence.

Integrated digital solutions that connect projects, assets, people and information—enabling smarter decisions, greater efficiency and intelligent outcomes across the entire lifecycle.