The How and Why
The Coalition for Smarter Buildings (C4SB) exists to solve a problem the building industry could not solve alone: how to deploy smarter buildings at scale using open, interoperable technology that aligns with real owner needs. C4SB’s work focuses on identifying, developing, and publishing open standards, open specifications, and open resources that together form an Open Building Stack—a practical alternative to proprietary, vertically integrated “smart building” solutions.
Visit Booth C743 to learn how these efforts translate directly into deployable solutions—and how they connect to the 2026 C4SB sessions and working groups shaping the next phase of industry execution.
2022: From Foundations to Momentum
In 2022, C4SB focused on building the foundation—aligning stakeholders, defining shared language, and creating the conceptual “railroad tracks” for smarter buildings. By 2023, the emphasis shifted: the tracks were in place, and the challenge became getting owners, designers, integrators, and operators moving in the same direction with a clear destination.
That destination is now commonly framed through the 4 M’s:
Maintain · Migrate · Modernize · Monetize
These concepts anchor the 2026 C4SB sessions, tying technology decisions directly to operational and financial outcomes that owners care about.
2023: When Owner Demand Became Unmistakable
The 2023 C4SB session marked a pivotal moment. Building owners and operators stopped framing their needs in terms of individual systems and began articulating enterprise-level expectations—the same expectations they already place on IT and digital business platforms.
Key demand signals included:
- Health, Well-being, and Tenant Experience
Indoor air quality, visibility into environmental conditions, and digital amenities became essential for attracting and retaining tenants. - ESG, Carbon Reduction, and Electrification
Decarbonization, renewable integration, and EV charging shifted from aspirational goals to financial, regulatory, and reporting requirements. - Operational Cost and Workforce Constraints
Severe staffing shortages drove demand for systems that reduce complexity, automate insight, and allow smaller teams to manage larger portfolios. - Expanded Risk Management
Risk concerns broadened beyond cybersecurity to include physical security, air quality monitoring, resilience, and business continuity.
The conclusion was clear and widely shared:
Interoperability is the only viable response to these converging pressures.
Not ad hoc integration—but open, standards-based interoperability across systems, data, applications, and organizations.
2024: From Vision to Execution: C4SB’s Core Workstreams
Responding to this demand, C4SB deliberately shifted from advocacy to delivery, aligning its working groups around practical outputs that could be used immediately by owners and project teams.
1. The Smarter Stack: A Common Model for the Industry
The Smarter Stack provides an 8-layer, open framework that connects business intent to physical building systems:
- Purpose (outcomes and goals)
- Operations (people and workflows)
- Delivery (integrators, service providers)
- Applications
- Exchange (middleware, APIs, protocols)
- Data (governance, normalization, storage)
- Systems (BAS, lighting, security, etc.)
- Physical (equipment and infrastructure)
This model underpins multiple 2026 working groups, serving as the organizing structure for specifications, cybersecurity, analytics, and workforce definitions.
2. Division 25 Framework: Bridging Owners and Procurement
One of C4SB’s most significant outputs is the Division 25 Framework—a collaborative, open resource designed to close the long-standing gap between owner intent and construction specifications.
- Provides structured questions and requirements aligned with the Smarter Stack
- Moves “smart building” discussions from vague aspirations to procurement-ready language
- Supports true interoperability rather than one-off integrations
Division 25 remains a central focus of 2026 sessions and working groups, particularly those addressing scale, repeatability, and owner adoption.
3. Procurement, Delivery, and Workforce
C4SB also addressed systemic barriers that technology alone cannot fix:
- Procurement Models
Advocating early engagement of Master Systems Integrators (MSIs) and design-assist approaches to prevent interoperability from being value-engineered out of projects. - Workforce Development
Defining new IT-centric roles, standardizing job functions, and supporting modern apprenticeship and training pathways to address the skilled labor shortage.
These efforts directly inform 2026 working groups on workforce, delivery models, and systems integration.
4. Showcases and Playbooks
To move beyond theory, C4SB began cataloging real-world examples of successful interoperable projects—creating a practical playbook owners and teams can follow rather than reinventing solutions building by building.
2025: A Major Milestone: C4SB and the Linux Foundation
A defining development that happened in 2025 is that C4SB is now part of the Linux Foundation ecosystem. This is a major inflection point for the smart building industry.
The Linux Foundation represents the global governance model for open, trusted digital infrastructure—the same model that enabled Linux, cloud platforms, and modern enterprise software to scale worldwide. C4SB’s alignment with this ecosystem signals that open building standards are no longer peripheral experiments, but part of mainstream digital infrastructure.
For owners, policymakers, and technologists, this reinforces a critical reality:
Buildings are digital systems—and they must evolve using the same open principles that transformed IT.
This alignment strengthens C4SB’s credibility, accelerates collaboration, and directly supports the 2026 agenda focused on scale, trust, and repeatability.
Organizational Context and Leadership
C4SB originated from the Monday Live weekly webinar series and a parallel policy-oriented initiative focused on advancing smarter buildings without lobbying. It was formally established as a vendor-neutral 501(c)(3) nonprofit in 2021, designed to provide credible leadership across a multi-vendor, multi-discipline industry.
Rick Justis is the Founder and Executive Director of the Coalition for Smarter Buildings. Pete Scanlon assisted in founding C4SB and remains an active contributor to its ongoing work, including frameworks, specifications, and industry collaboration.
Semantic Interoperability: From Data Exchange to Meaning
C4SB’s next phase goes beyond connecting systems; it focuses on making building data understandable across tools and teams through semantic models. This is where work such as ASHRAE 223P matters: it defines consistent, machine-readable relationships between equipment, points, systems, and intent, so analytics, fault detection, commissioning, and operations can scale reliably across portfolios.
This semantic layer connects naturally to BIM and digital delivery by preserving context: what an object is, what it serves, and how it relates to other systems, not just where it is drawn.
BIM provides critical foundations for spatial and asset identity, but semantics are what turn models into operational systems of record. This is how buildings become first-class digital infrastructure: standardized semantics, open identifiers, and trusted exchange.
2026: Bottom Line: Where C4SB is today
The conversation has shifted decisively:
- Owner demand for interoperable, data-centric buildings is real and urgent
- C4SB has moved from coalition-building to delivering usable, open frameworks
- The Smarter Stack and Division 25 work provide a shared industry foundation
- Workforce and procurement reform are now inseparable from technology strategy
- And C4SB’s inclusion in the Linux Foundation ecosystem positions open buildings alongside the world’s most successful digital platforms
The groundwork is complete.
The standards are emerging.
The next phase is scale—and 2026 is where that work accelerates.
