Welcome
The European Union is promoting the adoption of Local Digital Twins to accelerate the transformation of cities and communities. Many municipalities face common challenges: fragmented digital systems, varying levels of maturity, and a lack of shared standards that make it difficult to scale digital innovation.
The EU LDT Toolbox addresses these challenges by providing a single access point where public administrations can find interoperable tools, datasets, algorithms and documentation. Every component is aligned with European standards, helping cities build, expand or connect their Local Digital Twin efficiently and consistently.
What is a Local Digital Twin?
A Local Digital Twin (LDT) is a digital replica of the city that describes and represent the current state of the city.
To create a simulation of the Local Digital Twin, cities need to collect data about their city, use algorithms (like mathematical instructions) to process this data, and build models (like representations of how things work) to understand the city's needs.
The Living-in.EU initiative defines a Local Digital Twin as ”A virtual representation of a city’s physical assets, using data, data analytics and machine learning to provide simulation models that can be updated and changed (real-time) as their physical equivalents change”
What is the EU LDT Toolbox?
The EU LDT Toolbox is a set of tools that enables cities to simulate and predict scenarios of local digital twins.
Why the Toolbox Matters
The EU Local Digital Twin (LDT) Toolbox is not only a catalogue of tools; it is a practical enabler for evidence-based policymaking.
By offering accessible, interoperable components, the Toolbox helps cities reduce complexity, reuse proven resources, and accelerate their digital transformation in key urban domains such as mobility, energy, planning and sustainability.
Its purpose is to support cities, regions and public administrations in adopting Local Digital Twins grounded in trustworthy data, European interoperability principles, and long-term digital sovereignty.
Benefits
What’s in the Toolbox?
The EU LDT Toolbox brings together three key building blocks designed to help cities create, operate and scale their Local Digital Twin:
Interoperable Core Tools & Marketplace
Main components
EU Building Database
It provides detailed structural, physical, energy and occupancy attributes that support modelling, simulation and scenario analysis across urban domains.
The dataset includes information such as structural type, construction year, number of dwellings, materials, roof type, heating systems, height, population patterns, replacement costs and U-values.
These attributes enable cities to perform accurate simulations for energy performance, renovation strategies, vulnerability assessment and environmental impact.
Algorithm Models
EU LDT TOOLBOX IN ACTION
A guided tour showcasing the EU LDT Toolbox suite and how interoperable European tools work together to support smarter urban planning and public service innovation.
WHAT’S COMING?
Available in its first version by June 2026, the EU LDT Toolbox will deliver a phased set of milestones:
These milestones ensure a progressive rollout, allowing cities to test, adopt and scale Local Digital Twins using interoperable, EU-aligned components.
JOIN OUR COMMUNITY
Connect with the EU LDT ecosystem and stay updated on releases, pilots and collaboration opportunities.
THE CONSORTIUM
The EU LDT Toolbox is being developed by a multidisciplinary consortium of European technology providers, research institutes and innovation partners. Together, they contribute technical, scientific and operational expertise to support the development of interoperable Local Digital Twin solutions for cities across Europe.
Funded by the European Union.
FROM PROJECT TO LONG-TERM EUROPEAN SERVICE
The EU LDT Toolbox is developed under a European Commission initiative and will be transferred to the European Digital Infrastructure Consortium (EDIC) for long-term operation, maintenance and further development.
This ensures continuity, sustainability and alignment with EU standards as the Toolbox evolves and is adopted by cities across Europe.
