Volumetric BuildingEst. 2026

Reference · living document

North American Factory Ledger

Who builds volumetric modules on this continent, where, out of what, for whom, and under whose ownership. The last column — published capacity or output — is the one that matters most and is almost always empty. That absence is the finding. No trade body publishes plant-level data; this ledger makes the gap visible one row at a time, and fills it as manufacturers and filings allow.

Scope and rules

Permanent volumetric modular first; relocatable-building lessors and panelised manufacturers are included where they matter to the market and labelled as such. Capacity records only figures a company or filing has published, with the date — a 2019 press release is listed as a 2019 figure, not a current one. "None published" means exactly that. Status uses the same three tags as the Reciprocity Tracker: Verified against a dated 2025–26 source, Partial, or Unverified for entries carried from directories or general knowledge pending confirmation.

United States

CompanyPlantsStructureSegmentsOwnership · statusPublished capacity / outputStatus
Volumetric Building CompaniesPhiladelphia PA; Tracy CA (ex-Katerra); Berwick PA; PolandSteel / hybridMultifamily, hospitality, student & workforce housingPrivate; grew by buying distressed plants; units run as independent P&LsNone publishedVerified
Z Modular (Zekelman Industries)Chandler AZ; Killeen TX; Birmingham AL; Kitchener ONHot-rolled & cold-formed steel (VectorBloc)Multifamily, hospitality, healthcare, educationPrivate division of Zekelman"10M sq ft/yr" — 2019 press release; likely stalePartial
AutovolNampa IDLight-gauge steel, robotic lineMultifamily, workforce housingPrivate; $102M automated plant (as Prefab Logic, 2018)1,600 units/yr — announced target at launch, not reported outputPartial
GuerdonBoise IDWood / steelMultifamily, hospitality, education; Lahaina rebuildPrivate, long-established; 2026 expansion coverageNone publishedVerified
Harbinger Production (ex-Factory_OS)Vallejo CAWoodAffordable & supportive multifamilyWARN notice Feb 2026 (~290 staff); assignment for benefit of creditors Apr 30, 2026; asset sale, bids due Jun 12. Outcome unconfirmed~4,000 units cumulative (company claim, 2026)Verified
Fading WestBuena Vista COWoodAttainable & workforce housing; Lahaina rebuildPrivate, Norwood-affiliatedNone publishedVerified
BoxablNorth Las Vegas NVSteel / composite panel (folding)Single-family, ADUPublic — Nasdaq: BXBL since Jul 21, 2026 (SPAC with FG Merger II); 1H26 net loss $13.6M~600 units cumulative (analyst, 2025); quarterly output will now be disclosedVerified
RISE ModularOwatonna MNWoodMultifamily; Alora at Dry Creek (329 units, Centennial CO)PrivateNone publishedPartial
Sunbelt Modular platform (incl. Whitley, Titan, Apollo)18 plants, US Southeast and beyondSteel / woodEducation, healthcare, workforce, commercial; relocatable and permanentPE-owned (Littlejohn & Co.); Whitley acquired Jul 2025; Titan/Apollo Sep 2026None publishedVerified
Champion Homes (Genesis)Multiple US plantsWood / steelSingle-family; Genesis multifamily line relaunchedPublic (NYSE: SKY)Segment data in filings; no modular-specific unit countPartial
Cavco IndustriesMultiple US plantsWood / steelSingle-family; some commercialPublic (Nasdaq: CVCO)Homes shipped in filings; modular share not broken outUnverified
Clayton HomesMultiple US plantsWoodSingle-family, primarily HUD-code; some modularBerkshire Hathaway subsidiaryNone modular-specificUnverified
Plant PrefabTejon Ranch CA (automated); Rialto CA earlierWoodSingle-family, small multifamilyPrivate; 2026 operating status not confirmedNone publishedUnverified
BlokableVancouver WASteel, stackableWorkforce & supportive housingPrivate; current scale not confirmedNone publishedUnverified
Connect HomesLos Angeles CASteelSingle-family, small multifamilyPrivateNone publishedUnverified
VantemPuerto Rico; US expansionInsulated structural panel / hybridMultifamily, hospitality, resilient housingPrivate, growth-stageNone publishedUnverified
SamaraMexicali, Mexico (serving California)Steel / panelADU; Altadena fire rebuildPrivate (Airbnb spin-out)~2 units/day factory capacity — company claim, 2025Partial
Icon Legacy · Signature Building Systems · Ritz-Craft · Simplex · Westchester ModularPennsylvania and New YorkWoodCustom single-family, light commercialPrivate, regionalNone publishedUnverified
WillScot · McGrath RentCorp / Mobile ModularNational yard networksSteel, relocatableSite offices, portable classrooms, healthcare — lessors, not permanent volumetricPublic (Nasdaq: WSC, MGRC)Fleet and utilisation in filings — the only segment with audited utilisation dataPartial
Closed: Katerra (Chapter 11, Jun 2021; Tracy plant to VBC) · Veev (shut down Nov 2023) · Kullman · Capsys

Canada

CompanyPlantsStructureSegmentsOwnership · statusPublished capacity / outputStatus
MODUS Structures + ROC ModularCrossfield AB; Bow Island AB (three plants, 260,000+ sq ft)Steel / wood; CLT hybrid (ROC)Multifamily, social & Indigenous housing, hospitality, workforcePrivate; MODUS acquired ROC Sep 10, 2026; 460+ employeesFloor area onlyVerified
ATCO Structures incl. NRB Modular SolutionsAlberta; Ontario; multi-siteSteel / woodWorkforce, healthcare, education, multifamilyPublic parent (TSX: ACO); NRB acquired from DexterraNone modular-specificVerified
Nordic Structures (Chantiers Chibougamau)Chibougamau QCMass timber (CLT / glulam) modulesEducation (modular classrooms), multifamilyPrivate, forestry-integratedNone publishedVerified
RCM Groupe / RCM ModulaireSaint-Benoît-Labre QCWoodWorkforce & remote housing, multifamilyPrivateNone publishedPartial
Pro-Fab · Maisons Laprise · BonnevilleQuebec (Chaudière-Appalaches, Montmagny, Beloeil)WoodSingle-family, small multifamilyPrivate, established Quebec manufacturersNone publishedUnverified
BOXX Modular (formerly Britco) · Metric ModularBritish ColumbiaSteel / woodWorkforce, healthcare, education, multifamilyPrivate; Britco rebranded; Metric's relationship and current status need confirmationNone publishedPartial
Stack Modular (with Bird Construction)BC office; manufacturing in ChinaSteelMultifamily, hospitality, workforcePrivate; offshore production modelNone publishedUnverified
HonomoboEdmonton ABSteelADU, small commercialPrivateNone publishedPartial
KaroleenaAlbertaWoodSingle-family, small multifamilyPrivateNone publishedUnverified
Intelligent CityVancouver BCMass timber panels, robotic — panelised, not volumetricMid-rise multifamilyPrivate; "commercial volume production" announcedNone quantifiedPartial
Grandeur Housing · Triple M HousingManitoba; AlbertaWoodSingle-family, multifamily, remotePrivateNone publishedUnverified

What the ledger shows

Of thirty-six entries, exactly one has a dated, audited production figure on the way — Boxabl, because it is now a public company and must file — and one relocatable segment publishes fleet utilisation, because lessors always have. Every permanent volumetric manufacturer on this continent, from the largest platform to the smallest Quebec shop, reports output on its own terms or not at all. The two "capacity" figures that circulate most widely are a 2019 press release and a 2018 launch target.

This is why the sector's market-sizing depends on trade-body surveys rather than production statistics, and why nobody can answer the question a lender or a public buyer most wants answered: how much of this industry's capacity is actually busy? Until manufacturers publish, the honest answer is that no one outside their own finance departments knows — and the pattern of the past five years, in which factories with visible order books and prominent backers closed within months of a pipeline gap, suggests the utilisation figure would not flatter the industry.

Manufacturers: publish and we will list it

We will record any output or utilisation figure a manufacturer publishes, with its date and definition, and link to the source. Units shipped per quarter, square feet per month, line-days utilised — any consistent metric is better than none. Write to editor@volumetricbuilding.com. The first permanent-modular manufacturer in North America to publish audited quarterly output gets a profile.