Office Trailer Sizing Guide — How Many Workers?
Choose the right trailer size based on headcount, use type, and configuration. Use the tables below to match your crew size to the correct trailer.
Square Footage Per Worker
The amount of space each worker needs depends on how the trailer will be used. Private offices require more square footage per person than open plan layouts.
- Private Offices
- 100-150 sq ft per worker. Accounts for desk, chair, filing, and guest seating. Best for project managers, superintendents, and roles requiring phone privacy.
- Open Plan / Shared
- 50-75 sq ft per worker. Workstation-style layout with shared plan tables and common areas. Best for engineering teams, field coordinators, and administrative staff.
Trailer Size Comparison
The table below shows every standard office trailer size, the interior square footage, maximum worker capacity, transport weight, and the most common configuration for that size.
| Size | Interior Sq Ft | Max Workers | Weight (lbs) | Common Configuration |
|---|---|---|---|---|
| 8x20 | 160 | 1-2 | 4,000-5,000 | Single office, guard shack |
| 8x32 | 256 | 2-3 | 6,000-7,000 | Office + small meeting area |
| 8x40 | 320 | 3-4 | 7,500-9,000 | Open plan office |
| 10x40 | 400 | 4-5 | 8,000-10,000 | Office + conference room |
| 10x50 | 500 | 5-6 | 10,000-12,000 | Office + conference + break room |
| 10x56 | 560 | 6-8 | 11,000-13,000 | Multi-room office |
| 12x60 | 720 | 8-10 | 14,000-18,000 | Full office suite |
| 12x64 | 768 | 10-12 | 15,000-20,000 | Large office suite |
| 24x60 (double-wide) | 1,440 | 15-20 | 28,000-35,000 | Open plan + conference |
| 36x60 (triple-wide) | 2,160 | 25-30 | 42,000-50,000 | Full site office complex |
Quick Sizing Recommendations
Use these rules of thumb based on your crew size. These assume a mix of private and shared space.
1-2 workers
8x20 (160 sq ft) — single office or guard shack. Single axle, bumper pull delivery.
3-4 workers
8x40 (320 sq ft) — open plan office with room for plan tables and shared equipment.
5-8 workers
10x50 to 10x56 (500-560 sq ft) — multi-room layout with conference and break areas.
8-12 workers
12x60 to 12x64 (720-768 sq ft) — full office suite. Wide load delivery, escort required.
15-20 workers
24x60 double-wide (1,440 sq ft) — two units joined on site. Requires crane for assembly.
25-30 workers
36x60 triple-wide (2,160 sq ft) — full site office complex. Three units, crane set required.
Configuration Options
Office trailers can be configured for a range of uses. The configuration you need affects the trailer size — a break room or conference room takes space away from workstations, so you may need to size up.
Single Office
One room with desk, chair, filing cabinet, and guest seating. Best for site superintendents or project managers who need a private workspace. Typical size: 8x20.
Open Plan Office
One large room with multiple workstations and shared plan tables. Maximizes worker capacity per square foot. Typical size: 8x40 or larger.
Office + Conference Room
Divided layout with office space on one side and a meeting room on the other. Allows owner meetings and coordination without leaving the site. Typical size: 10x40 or larger.
Office + Break Room
Includes a kitchenette area with microwave, refrigerator, and sink. Required on many long-duration projects. Typical size: 10x50 or larger.
Transport Considerations
Trailer width determines how the unit is transported. This matters for your delivery timeline and access road requirements.
- Single-wide (8 ft wide):
- Towable on public roads without special permits. Bumper pull or tandem axle. Most common for construction sites.
- Single-wide (10-12 ft wide):
- Requires wide load permits and may need escort vehicles. Tandem axle. Allow extra delivery lead time.
- Double-wide (24 ft):
- Two units transported separately, joined on site with a crane. Provides open interior space not possible in single-wide units.
- Triple-wide (36 ft):
- Three units, crane set required. Used for large site offices and project headquarters.
Frequently Asked Questions
Not Sure What Size You Need?
Tell us your crew size and how you will use the space. We will recommend the right trailer.