Build Ahead
CfOC-ICC-1220 (v0.2) Graduating into a Navigable as a Standard
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The Center for Offsite Construction has released a new working draft of CfOC-ICC-1220 that gives consensus committee members a clearer structure for developing repeatable interface requirements for off-site constructed products. The draft organizes the standard around three core concepts—location, clearance, and access—and introduces a sequence-neutral framework for testing, inspection, verification, and acceptance. This version marks an important milestone in connecting 1220 to the CfOC’s broader roadmap, including the CTO file type, the CTO Interface Standard, Handshake, and future interface standards such as CfOC-ICC-1230.
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A New Payment Instrument for Offsite Construction: Introducing the CTO Schedule of Values
Blog | Apr 28, 2026
The Center for Offsite Construction has released an April 2026 revision of From Handshake to Hardware, adding a new appendix on a proposed CTO Schedule of Values. The new exhibit models how offsite products can be tracked through ordering, fabrication, assembly, shipping, staging, rigging, hoisting, installation, commissioning, and staged acceptance. The update connects future standard forms of agreement to CfOC’s interface standards work and the emerging CTO file type.
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When Two CfOC Projects Meet: CfOC-ICC-1220 meets the CTO filetype. Announcing the CIS file type (CTO Interface Standard)
Blog | Apr 19, 2026
The Center for Offsite Construction has reached a major milestone: the CTO file type project has now spun off the CIS, or CTO Interface Standard, a new file type dedicated to describing how two manufactured building products connect at installation. This matters because it is another moment when two CfOC initiatives merge and strengthen one another, linking the digital CTO file type work directly to the CfOC-ICC-1220 standards effort being developed with ICC under the Center’s ANSI-accredited process. In practical terms, the CIS helps move interface standards out of static documents and into machine-readable infrastructure, bringing the larger Configure-to-Order marketplace one step closer to reality.
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Recent advances in the .cto file type.
Blog | Apr 17, 2026
This spring, the Center for Offsite Construction published two new versions of the .cto file type — the open standard for Configure-to-Order construction — introducing level datums that host cartridges and walls, stairwells as first-class bounding volumes, and roofs modeled as geometric prisms. Together these updates move the spec closer to how buildings are actually designed, built, and delivered, while laying the structured data foundation that AI agents and provenance tools need for 21st-century construction.
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What's Holding Offsite from Scaling -- Learning from the Hardware Lottery
Blog | Apr 14, 2026
Construction innovation rarely fails on merit alone; it fails when the surrounding system is not ready to support it. This conversation uses Sara Hooker’s “hardware lottery” idea to explain why offsite construction needs more than better products—it needs aligned standards, contracts, file structures, and market infrastructure. The Center for Offsite Construction’s work is presented as exactly that: building the missing commons that could finally let industrialized construction scale.
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The .CTO File Now Knows Who's Responsible, At Every Step of an Offsite Project
Blog | Apr 08, 2026
Version 0.1.4 of the CTO file format — the open standard for Configure-to-Order construction developed by the Center for Offsite Construction — now encodes the complete record of responsible parties and their insurers for every building component, from factory floor to final acceptance. Combined with the format's existing chain-of-custody framework, architects, developers, lenders, and legal professionals can trace ownership, risk, and insurance coverage at every stage of a product's journey from manufactured good to real property. The update also introduces a three-layer geometry standard separating spatial envelopes, 3D models, and 2D construction drawings — all within a single open file format designed for Configure-to-Order building delivery.
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What AI’s “Hardware Lottery” Reveals About Construction
Blog | Apr 03, 2026
A concept from AI research offers a useful lens for construction. Just as some ideas in artificial intelligence succeeded because they fit the hardware and software of their era, construction methods often succeed because they fit the incumbent delivery stack of contracts, codes, labor practices, software, review pathways, and interfaces. This essay argues that the future of offsite construction depends not only on better products, but on building the standards, agreements, and digital infrastructure that let better methods prove themselves.
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Big, New Configurator File Type Progress: announcing the .cto file type's Specification, Git Repository, & Updated Whitepaper
Blog | Apr 02, 2026
CfOC's April 2026 Rule Layer whitepaper releases the expanded .cto Configurator File Type schema — covering offsite product configuration, installation sequencing, logistics coordination, and chain-of-custody tracking in a single open, vendor-neutral file format. Built on the legal framework established in From Handshake to Hardware, the schema encodes UCC-aligned mateline definitions, warranty activation states, and firm MSRP pricing as first-class fields. The working schema is live on GitHub; formal standardization through CfOC's ANSI-accredited process is underway.
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Details on Why Supply Matters. (Not Just the System That Produces It.)
The Center for Offsite Construction reflects on Supply Skepticism Revisited by Vicki Been, Ingrid Gould Ellen, and Katherine O’Regan, a timely essay arguing that adding housing supply improves affordability by lowering rents, slowing rent growth, and reducing pressure across the market. The CfOC agrees that housing supply matters, but argues that the deeper challenge is building the production infrastructure needed to turn permission into delivered housing at speed, scale, and with repeatability. This post explores where the essay overlaps with the CfOC’s Future of Design & Delivery platform—and why standards, legal frameworks, product rules, and digital coordination tools are essential to making abundant housing possible.
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