10-Foot Wide Office Trailers: The Complete California Guide
The most versatile office trailer series available , more room, more layout options, and restroom configurations that fit virtually any California job site or commercial application. Here is everything you need to know about the 10×20, 10×28, 10×32, 10×40, 10×44, and 10×52.
The 10-foot wide office trailer series is the most widely used configuration across California job sites, government projects, schools, and commercial applications. Available from 10×20 (200 sq ft) up to 10×52 (520 sq ft), these units provide significantly more layout flexibility than 8-foot wide trailers , with restroom options starting at the 10×28, plan table configurations, private office layouts, and conference areas available across the range. API Trailers carries all 10-foot wide sizes for rent, lease, or purchase with delivery anywhere in California.
When a project outgrows the 8-foot wide office trailer series but does not yet need a double-wide configuration, the 10-foot wide office trailer is the answer. The extra two feet of interior width changes what is possible inside , private offices become more comfortable, plan tables fit without crowding the workspace, and restroom configurations stop feeling like an afterthought.
This guide covers every standard 10-foot wide configuration in detail. You can also view API Trailers’ full office trailer floor plan gallery and browse the complete office trailer lineup for all available sizes.
The 10×20 Office Trailer
10×20 Office Trailer Floor Plan · View Full Floor Plan Gallery
The 10×20 is the entry point into the 10-foot wide series. At 200 square feet it provides the same square footage as a standard 10-foot wide single office but with a noticeably more open feel compared to the 8-foot wide units. The extra width changes how the space works , there is room for a proper workstation layout rather than a narrow desk along one wall, and movement within the trailer is more comfortable for day-to-day use.
For a single project manager or superintendent who wants more than the 8-foot series offers but does not need the additional length of a 10×28 or 10×32, the 10×20 is a strong fit. It can also be configured with an optional restroom for sites without separate facilities.
Best Uses
- Single project manager or superintendent office with a more comfortable layout
- Two-person engineer or inspection field office
- Small contractor office for short to medium-term projects
- Permit and documentation office on government projects
- Temporary business office during renovation or expansion
The 10×28 Office Trailer
10×28 Office Trailer Floor Plan · View Full Floor Plan Gallery
The 10×28 is the first configuration in the 10-foot wide series that includes a full integrated restroom as standard. At 280 square feet it provides a proper office workspace for 2 to 3 people alongside a dedicated restroom , making it a fully self-contained unit that does not depend on external facilities for a complete workday.
For California job sites where porta-potties are the only alternative, stepping up to the 10×28 adds meaningful comfort and professionalism to the site office setup. It is a strong choice for mid-size contractors, government inspection teams, and projects where the office will be used by rotating crews across multiple shifts.
Best Uses
- Job site office where a self-contained restroom is needed but the 10×32 is more than necessary
- 2 to 3 person contractor or inspection field office
- Remote project site with no separate restroom facilities
- Government or municipal project requiring ADA compliant restroom access
- School district or healthcare temporary administrative office
The 10×32 Office Trailer
10×32 Office Trailer Floor Plan (with restroom) · View Full Floor Plan Gallery
10×32 Office Trailer Floor Plan (open layout) · View Full Floor Plan Gallery
The 10×32 is the most rented office trailer configuration in California , and for good reason. At 320 square feet with a full integrated restroom, it hits the sweet spot between size, usability, and cost. It comfortably handles 2 to 4 workstations, fits a plan table if needed, and includes a proper restroom without sacrificing meaningful office space.
For general contractors, project managers, and site superintendents who need a professional, self-contained field office that works from day one, the 10×32 is the go-to unit. It is available in two primary layouts , with the restroom at one end leaving the full remaining length as open office space, or in a partitioned layout with a private office and open area. Both floor plans are shown above.
Best Uses
- General contractor job site office , the California industry standard
- Project manager and superintendent combined office
- Government and municipal field office requiring ADA compliance and restroom
- School district temporary administrative office
- Real estate developer sales office for small to mid-size projects
- Engineering and inspection field office for 2 to 4 person teams
- Healthcare or nonprofit temporary administrative space
Looking for a 10×32 in California?
It is our most requested unit. Call us and we will confirm same-week availability from our 1,000+ unit fleet anywhere in California.
The 10×40 Office Trailer
10×40 Office Trailer Floor Plan · View Full Floor Plan Gallery
The 10×40 is the natural step up from the 10×32 for projects with a slightly larger crew or more complex workspace needs. The additional 80 square feet makes a meaningful difference in layout flexibility , enough to add a dedicated plan table alongside full workstations, configure two private offices with a shared restroom, or create a small open bullpen with a separate supervisor office.
For project teams that rotate multiple people through the office across a shift, or for contractors who hold regular on-site subcontractor coordination meetings, the 10×40 provides the space to do that comfortably without stepping up to a double-wide configuration.
Best Uses
- 3 to 5 person contractor or developer field office
- Job site office with dedicated plan table and separate supervisor office
- Government project headquarters requiring restroom and meeting space
- School or healthcare temporary administrative office for a small team
- Real estate sales office with reception area and private closing office
- Energy or industrial field headquarters for rotating crew shifts
The 10×44 Office Trailer
10×44 Office Trailer Floor Plan · View Full Floor Plan Gallery
The 10×44 provides 440 square feet in the standard 10-foot wide footprint , enough to configure a proper conference or meeting area alongside individual offices and a restroom. This makes it the right choice for project teams that regularly host client meetings, subcontractor briefings, or safety training sessions on-site and need a dedicated space for that activity without pulling the office area out of commission.
It is also a strong fit for government and institutional projects where the site office needs to function as a proper administrative facility with room for multiple staff members working simultaneously across different functions.
Best Uses
- Contractor field office with on-site conference or meeting room
- 4 to 6 person project team headquarters
- Government or municipal administrative office
- Developer sales or leasing center with meeting space
- Healthcare or school district team office requiring conference capability
- Safety training and orientation facility on large California construction projects
The 10×52 Office Trailer
10×52 Office Trailer Floor Plan · View Full Floor Plan Gallery
The 10×52 is the largest configuration in the standard 10-foot wide series. At 520 square feet it provides the maximum space available in a single-wide 10-foot unit , enough for a full multi-room office layout with multiple private offices, a conference or break area, and a restroom, all within a single footprint that still fits on most California job sites without the logistics of a double-wide delivery.
For large projects, multi-discipline project teams, or any application where the 10×40 and 10×44 feel slightly short but a double-wide is more than needed, the 10×52 is the right answer. It is also a practical choice for longer-term installations where the site office needs to function as a complete, professional administrative facility for an extended period.
Best Uses
- Large project headquarters with multiple private offices and a conference room
- 4 to 7 person multi-discipline project team office
- Long-term government or institutional field office
- Healthcare administrative facility requiring multiple private consultation rooms
- Construction management office for a major California infrastructure project
- Real estate leasing center with multiple private offices and a reception area
All 10-Foot Wide Sizes at a Glance
| Size | Sq Ft | People | Restroom | Best For |
|---|---|---|---|---|
| 10×20 | 200 | 1 to 2 | Optional | Single office, wider footprint than 8-foot series |
| 10×28 | 280 | 2 to 3 | Yes | Self-contained office with restroom for remote sites |
| 10×32 | 320 | 2 to 4 | Yes | Most popular in California , standard contractor unit |
| 10×40 | 400 | 3 to 5 | Yes | Multi-workstation with plan table or private office option |
| 10×44 | 440 | 4 to 6 | Yes | Office plus dedicated conference or meeting area |
| 10×52 | 520 | 4 to 7 | Yes | Maximum single-wide space, multi-room layout |
Why the 10-Foot Wide Series Is the California Standard
The 10-foot wide office trailer has become the default choice for California job sites for practical reasons. The extra two feet over the 8-foot wide series adds enough interior space to change how a trailer actually functions without creating delivery challenges. 10-foot wide trailers are a standard oversize transport width in California , they move on the state’s road network without the same permitting complexity as 12-foot wide units, and they fit on the vast majority of California job sites without access issues.
The restroom availability across the 10-foot wide range starting at the 10×28 also makes a meaningful difference. A self-contained unit eliminates the coordination required for separate restroom facilities and the ongoing cost of porta-potty service, while providing the kind of professional on-site environment that reflects well on the project.
Delivery and Setup Across California
API Trailers delivers all 10-foot wide office trailer configurations from our Santa Maria, California manufacturing facility to any location in the state. Our in-house delivery team is licensed, bonded, and insured , the same team that builds the trailers handles the delivery, positioning, and setup.
Standard 10-foot wide units are transported as a single load and positioned on your site using our delivery trucks and trans-lift equipment for tight-access locations. Setup typically takes 2 to 4 hours for a single unit including utility connections. Same-week delivery is available on standard configurations across California , call 805-328-6031 to confirm availability for your site and timeline.
Built in California. By the People Who Designed Them.
Most companies renting office trailers in California are dealers. They purchase units from a third-party manufacturer, mark them up, and lease them out. When something goes wrong , a quality issue, a layout that does not match what was promised, a maintenance problem that takes weeks to resolve , you are dealing with a middleman who did not build the unit and has limited ability to fix it.
API Trailers is different. We are the manufacturer.
Every 10-foot wide office trailer in our fleet was designed and built in our own factory at 1916 W. Stowell Road in Santa Maria, California. Our engineers draw the floor plans. Our craftsmen frame, wire, insulate, and finish each unit. Our delivery team transports and installs them. When you rent or buy a 10×32 from API Trailers, you are dealing directly with the company that built it , no middlemen, no distribution chain, no markup passed through a dealer network.
in California
for rent or purchase
building every unit
API Trailers has been manufacturing office trailers and modular buildings in California since 1983. Over 42 years we have built units for UC campuses, county fire stations, government water districts, state parks, healthcare organizations, school districts, wineries, churches, and thousands of California contractors. The 10-foot wide units in our fleet today are built to the same standard of quality we have held since we opened , California DOH certified, ADA compliant, and built to last.
That factory-direct model also means competitive pricing without dealer markup. The rate you pay reflects what it actually costs to design, build, deliver, and maintain the unit , nothing more. For California contractors and developers who are comparing quotes, that difference is often meaningful.
When you call API Trailers at 805-328-6031, you are talking to the manufacturer. Not a sales rep at a national chain. Not a regional dealer. The people who answer the phone at our Santa Maria office are the same people connected to the factory floor, the delivery team, and the service technicians. That is what 42 years of doing one thing in one state looks like.
Frequently Asked Questions
Ready to get the right 10-foot wide unit on your site?
API Trailers manufactures and leases all 10-foot wide office trailer configurations from our Santa Maria, California factory. 1,000+ unit fleet. California DOH certified. ADA compliant. Same-week delivery available anywhere in California.