JL Modular

Smarter Modular Building

JL Modular specializes in permanent modular building projects throughout California. Our permanent modular construction includes modular schools, classrooms, commercial modular buildings, and medical institutions.  Browse our portfolio of modular construction projects.

Let the JL Modular team take it one step further. As General Contractors, Jeff Luchetti and his team approach your project with the expertise we bring to all of our construction projects. When it comes to modular building, that expertise translates into even greater savings of time, money, and stress.

Whether you need an efficiently built project within a tight schedule or a sophisticated LEED-certified building, we offer our customers a unique, full menu of design and construction services — and unparalleled flexibility that comes with working smarter.

Learn more about Modular Construction.

The Difference

At JL Modular, we are not limited by factory capabilities, like our competitors. No matter what your design and space requirements, as a modular manufacturer, we will source, procure, design, and build in a time frame that will meet or exceed your expectations, regardless of the sophistication of your project.

Warm Springs Elementary School Classroom Interior

For example, our panelized systems for floors, walls, and roofs can be made to your exact specifications, without limitations to size or height.

A Cut Above

Community is important to us. That means our schools, childcare and medical centers, and other public buildings need to serve us well. Our team of experienced builders works closely with you to make sure your project is completed to the highest quality standards and best value. When JL Modular completes your building we want you, our client, and everyone who uses the building to feel safe, proud, and satisfied.

Marin Community Center

As experienced builders, JL Modular provides knowledgeable insight into the entire construction process and a finished product that exceeds typical modular quality and design standards. By approaching each project as a unique design and layout we build a better modular project, without sacrificing budget or time.

Our panelized design allows you to design and build beyond standard transportation size limitations. Whether your project has specific features such as vaulted ceilings or clerestory roofs, or the structure will be a two-story building or a green building, we can deliver.

PRODIGi21 Modular Classroom Design

JL Modular is proud to offer PRODIGi21, our customizable classroom design that provides the flexibility and efficiencies of prefabricated construction with the quality and sophistication of a site-built structure. Learn more.

Building Systems

Modular Size

  • 10’ x 32’ and 12’ x 40’ PC Designs
  • Custom sizes up to 60’ clear spans

Modular Design

  • 4:12 double slope roof with 9’ and 10’ wall plate heights
  • Single pitch with 9’ to 12’ plate heights and clerestory windows


  • Rigid steel frame design for optimum opening flexibility
  • Slab on Grade
  • Stem wall with spread footing
  • Piers with grade beams
  • Metal stud framing infill
  • Rating, 1 hour and 2 hour construction where required



  • Window configuration to meet architects specifications
  • Metal doors and frames
  • Stucco, metal or hardie panel siding
  • Prefinished metal, built up, and composition shingle roofing


  • Ceilings, Vaulted T-bar acoustical, gyp board at restrooms
  • Walls, drywall, tackwall, FRP, ceramic tile at restrooms
  • Floors, VCT, carpet, ceramic tile or epoxy at restroom

Specialty Construction

  • Cabinetry to architects specification
  • Markerboards
  • Miscellaneous Specialties

Mechanical and Electrical

  • Plumbing: ABS, copper, or cast iron. Fixtures as specified by architect.
  • Fire Sprinklers: structure designed to carry sprinkler piping loads
  • HVAC: Gas/Electric HVAC units located on roof, in classroom closet or on exterior wall
  • Electrical: power, data, lighting, and low voltage systems to architects specifications.


Call us at 707.527.5788
Customers Say It Best

Norman Wilson


“Wilson Architecture, Inc. has worked with JLC and JL Modular for more than 12 years on modular school projects as well other public school projects in both Design Bid Build projects and Design-Build projects where we are an integral part of their team for the complete turn-key development of school projects. We have found him pro-active, timely, and very professional in their approach on projects from design thru DSA closeout and certification.”