Since 1968, Mark Line Industries has been delivering custom modular buildings to clients across North America and overseas.  From our roots, as a manufacturer of relocatable offices and classrooms, Mark Line grew from a single location, to one of the country’s foremost custom fabricators of modular buildings and permanent modular construction.  We serve clients in need of modular schools, modular classrooms, modular offices, modular medical buildings, modular urban housing, and modular hotels.

Today, we are recognized as one of the industry’s most innovative fabricators, serving both private and public sector clientele across North America as well as delivering mission critical facilities overseas.  We are proud to be a family-owned fabricator, proving that American manufacturing and innovation is alive and well.

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Construction is one of the oldest professions known to man.  Over several thousand years, humanity has built structures for a variety of purposes, and surprisingly, there has been relatively little process innovation over the millenia.  Materials are delivered to a site, labor travels to the site each day and then assembles the material into a finished building.

The Bureau of Labor Statistics shows that since the second World War, the construction sector is the only one in which productivity has actually DECREASED.  Mark Line leverages the latest in technology, equipment, and parametric design to deliver high-quality space with a high-degree of cost certainty on an accelerated timeline for clients across North America.

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Mark Line News

WABC7 in NYC features ML MODULAR


Mark Line in Dwell (December)

Long time inspiration and champion of prefabrication and modularization, Dwell magazine (if you don’t have a subscription Read more

modular urban housing

CurbedNY Tours an ML Building

Our urban density interim housing prototype fabricated for NYC OEM and FEMA with partners Garrison-Architects Read more


Mark Line at WOM

WOM Mark Line’s own John Morrison will be presenting at World of Modular 2015 in Las Read more

2015 Sectors to Watch

CMD is out with their latest data on non-residential starts.  Interpret the numbers as you wish, Read more


High Performance Fiber Cement

Low-end fiber cement products can be found cladding relocatable modular buildings across the country.  For Read more

Tech Innovation

Kitchen Cartridge of the Future

KITCHEN CARTRIDGE The FutureHAUS prototype being researched and designed by Virginia Tech Center for Design Research (long been Read more

ARCHITEXTURE Offers Seamless Files

As any architect or visual designer knows, applying appropriate, seamless and high-quality textures is always Read more


Must-Have Gift for Designers

With the holidays fast approaching, here is an affordable and high-tech stocking stuffer sure to Read more


Mark Line fabricates modular structures off-site in a climate controlled indoor fabrication facility.  Our company’s sustainability goals are to reduce the amount of materials diverted to landfills and re-use materials wherever feasible.  The controlled shopfloor environment allows us to do this in a manner that conventional construction never could.

Off-fall steel and lumber is recycled or re-used in appropriate places (backers, etc) and the indoor secure fabrication building keeps stored materials out of the elements and eliminates theft and vandalism.  Mark Line generates much less than 2% waste compared to site construction which can exceed 5%.


Modular fabrication can dramatically compress and accelerate construction timelines, delivering reductions of 25-50% depending on the details of the project.  From an overall process standpoint, modular fabrication allows for concurrent construction:  the building is being fabricated offsite as modular units at the same time that site development and foundation construction is happening at the site.

By working indoors, using an assembly line process similar to that of the automated, lean manufacturing employed by the automotive industry, buildings are completed faster and more efficiently, while the indoor nature of the process eliminates weather delays that plague conventional projects.


Modular buildings are a smart solution in today’s economy.  By working offsite in a manufacturing environment, there is a much greater degree of cost certainty.  The overruns that can be commonplace in conventional construction can be removed from one phase of the project by utilizing offsite fabricated modular units.

The modularity of structures also allows for flexibility for the owner as their needs change over time. Too often a new building is a captive solution and owners must project their needs far out into the future.  Modular buildings can be designed to scale overtime, adding to the overall footprint or height of the building all while minimizing disruption to the current occupants.