Open Building Protocols

Defining and Describing Open Building Protocols

• Open Building Protocols treat buildings as changeable systems rather than finished, fixed objects.

• In architectural theory, Open Building separates long-life collective infrastructure—often called the support—from shorter-life, user-controlled infill such as partitions, finishes, equipment, and services. ^[1] The approach originated as a response to the rigidity of treating an entire building as one indivisible design solution. ^[2]

• In contemporary practice, the phrase Open Building Protocols can also describe rules, interfaces, data standards, and governance arrangements that let different building components, suppliers, users, and software systems interoperate without proprietary lock-in. ^{[3] [4] [5]}

• The concept applies across the building life cycle: initial design, construction, occupation, renovation, maintenance, adaptive reuse, and eventual component replacement. ^{[6] [5]}

flowchart TD
S["Long life support"] --> I["Replaceable infill"]
I --> U["User adaptation"]
U --> C["Change over time"]
C --> S

Uses in Context

• Housing and architecture: “Open Building” describes housing in which a durable structural and service framework allows residents or later designers to modify interiors over time. ^[1]

• Healthcare design: The framework separates a hospital’s “base building,” tenant fit-out, and furnishings, fixtures, and equipment so specialized units can change with limited disruption to other systems. ^[2]

• Incremental housing: Elemental’s projects use serviced, partially completed structures that residents can expand, presenting a practical form of open-building logic under financial and regulatory constraints. ^[7]

• Building automation: Open protocols connect systems such as HVAC, lighting, access control, and energy metering across vendors through common interfaces and data models. ^{[3] [4]}

• Digital construction: openBIM uses vendor-independent formats to exchange building information among technologies, disciplines, and organizations throughout a project’s life cycle. ^[5]

• Sustainability and circularity: Separating long- and short-life components can support repair, replacement, material reuse, and reduced dependence on whole-building demolition. ^[1]

History of Use

Origins

• The intellectual origin is generally attributed to Dutch architect and theorist N. John Habraken, whose 1961 book Supports: An Alternative to Mass Housing articulated a distinction between a collective structural support and individually controlled dwelling infill. ^{[2] [1]}

• Habraken’s proposal challenged mass housing’s assumption that a single authority should determine the complete form of every dwelling; instead, it gave inhabitants a continuing role in shaping their living environments. ^[1]

• The original architectural concept predates the newer software and building-automation usage of “open protocols.” In the latter context, openness means documented, vendor-neutral communication and data exchange rather than only physical adaptability. ^{[3] [4] [5]}

Evolution

• 1961 — Support and infill: Habraken introduced Open Building as an alternative to mass housing, distinguishing the long-lived collective support from changeable individual dwelling components. ^{[2] [1]}

• Late twentieth and early twenty-first centuries — Institutional and healthcare adaptation: Open-building theory was applied to complex facilities where spatial arrangements, technologies, and operational requirements change over time; the Sammy Ofer Heart Building case documents modifications driven by medical technology, healthcare norms, and policy changes. ^[2]

• 2020s — Protocol and data-layer expansion: The idea increasingly overlaps with openBIM, semantic building models, interoperable building-management systems, and community-governed software that connect heterogeneous systems without proprietary lock-in. ^{[3] [4] [5]}

Best Real-World Examples

• Elemental’s Quinta Monroy, an incremental-housing project in Iquique that delivered serviced structures designed for resident-led expansion. ^[7]

• Elemental’s Constitución housing, where “half-a-house” units supplied essential kitchens, bathrooms, roofs, and load-bearing walls while leaving room for later additions. ^[7]

• Aranya Community Housing, a housing precedent associated with incremental and participatory adaptation. ^[7]

• Sammy Ofer Heart Building, a hospital project documented as separating system levels so changes in one level had minimal impact on others. ^[2]

• OpenBMS, a community-driven, vendor-neutral building-management system connecting BACnet, MQTT, and other building and IoT protocols. ^[3]

• openBIM, an initiative maintained by buildingSMART International that promotes vendor-independent building-data exchange. ^[5]

• BRICK Schema, a semantic modeling approach identified among community-governed standards for integrating heterogeneous smart-building systems. ^[4]

Case Studies

Elemental’s Quinta Monroy, Iquique. In Quinta Monroy, Chile, Elemental worked within tight housing-subsidy constraints and delivered partially finished, serviced structures rather than conventional turnkey homes. ^[7] The project provided a durable core while deliberately leaving residents the ability to extend and customize their homes. ^[7] This operationalized Open Building principles through incremental construction: the initial intervention established essential infrastructure, while later occupants supplied additional space and finishes as their resources and needs changed. ^[7] The case shows that openness can be a social and economic strategy, not merely a technical one: the building is designed to accommodate future agency rather than treating the first construction phase as final.

Sammy Ofer Heart Building, Tel Aviv. The Sammy Ofer Heart Building at Tel Aviv Sourasky Medical Center was designed by Sharon Architects and Ranni Ziss Architects and constructed between 2008 and 2011. ^[2] Its organization applied open-building theory by separating the primary building system, tenant or departmental fit-out, and furnishings, fixtures, and equipment. ^[2] Over the following decade, the spatial environment changed in response to specialized medical units, advances in medical technology, changing healthcare norms, and adaptive policy standards. ^[2] The project demonstrates why protocol-like separation matters in complex buildings: changes at one system level can occur with less disruption to other levels. ^[2]

OpenBMS and interoperable building control. OpenBMS presents a contemporary software interpretation of openness as a community-driven, vendor-neutral building-management system. ^[3] Its stated architecture connects BACnet, MQTT, and modern IoT protocols while aligning with emerging ASHRAE standards. ^[3] More broadly, interoperable smart-building platforms use standardized APIs, protocol adapters, and semantic layers to combine HVAC, lighting, access control, energy metering, and other subsystems from different suppliers. ^[4] This shifts Open Building Protocols from a primarily architectural theory into an operational technology practice: openness is expressed through documented interfaces, shared data models, and the ability to replace or combine components without being locked into one vendor. ^{[3] [4]}

Sources