Portland Porta Pros rents mobile office trailers for job sites across Portland, from small single-room units to larger layouts with a restroom built in, with day rates starting around $175 and monthly terms typically landing near $1,397 for the week. Most trailers move in on a flatbed and need clear ground to set skids or blocks. If you are staging a jobsite trailer alongside portable toilets and a dumpster, we coordinate the whole construction site services package in one delivery window.
Pricing runs by length of job, not just square footage. A short-term trailer for a quick project costs less per day than a unit held for months, but the math flips once you're past a few weeks. Ask about bundling delivery with storage container rental if you need file storage or tool lockup next to the office. We quote against actual site access, since a tight urban lot near downtown Portland can add setup time that a suburban lot in Milwaukie, 8.3 miles south, would not need.
| unit | duration | low | typical | high |
|---|---|---|---|---|
| trailer | day | 175 | 800 | 2500 |
| trailer | week | 150 | 1397 | 1650 |
| trailer | weekend | 900 | 2000 | 3000 |
| trailer | event | 2499 | 3500 | 3899 |
Delivery is billed separately and depends on distance and site prep. For projects further out, like a build near Hillsboro at 17.8 miles west or Vancouver, WA at 13.3 miles north, factor drive time into your delivery window. If you're comparing against a full restroom trailer instead of an office unit, our restroom trailer rental cost page breaks that out separately, since the two are priced and built differently.
Most single-supervisor jobs fit in a small mobile office trailer, while multi-crew projects need something closer to a double-wide with a private office and a shared workspace. A small mobile office trailer works fine for a foreman's desk, a plan table and storage for paperwork. Bigger crews on longer builds often add a mobile office trailer with bathroom configuration so staff aren't walking to a separate unit every time, though on most sites we still recommend standalone portable toilet rental for the crew since office restrooms fill fast under daily use.
Mobile office trailer weight matters more than people expect once you're planning ground protection or a temporary ramp. Heavier units need firmer ground and sometimes steel plates under the jacks, especially on a site that's been recently graded or is still soft from grading equipment. If your access route is narrow, measure clearance the same way you would for a roll-off dumpster rental delivery, since both need a straight approach and enough turning room for the truck.
Yes, and most of what moves through rental fleets is used stock that's been reconditioned between jobs. A used mobile office trailer usually costs less to place short-term than chasing a mobile office trailer sale and owning one outright, especially for a project with a defined end date. Interior condition varies unit to unit. A mobile office trailer interior with clean flooring, working outlets and a functional HVAC unit is worth asking about directly before delivery, not after.
If you're weighing "rent mobile office trailer" against buying, run the math against your project timeline first. A trailer held for a single season almost always rents cheaper than the carrying cost of ownership, insurance and eventual resale on a mobile office enclosed trailer. For jobs needing power alongside the trailer, ask about a temporary power pole or a light tower rental if the site runs work into early morning or evening hours.
Placement depends on grade, access and how the rest of the site is laid out. Crews searching "mobile office trailer near me" usually want it close to the entrance so deliveries and inspectors can find it fast, but that also means keeping it clear of the main equipment path. OSHA 1926.25 requires scrap and debris cleared from work areas, so keep the trailer's approach and steps free of material staging. If the trailer sits near active work with paints, coatings or similar contaminants, OSHA 1926.51(f)(1) requires washing facilities on site, separate from the general crew restrooms.
Pair the office trailer with a temporary fence rental around the immediate footprint if the site is open to foot traffic after hours. For power runs to the trailer, GFCI protection under OSHA 1926.404(b)(1)(ii) applies to temporary circuits on the site. And don't forget crew sanitation nearby. OSHA 1926.51(c) sets toilet counts by crew size, so even a well-equipped office trailer doesn't replace the need for portable restroom rental units sized to your headcount, which our how many porta potties do I need guide can help you figure out.
Placement in the public right of way needs confirming with the city before delivery. We don't guess at permit rules since they vary by lot and by how close the trailer sits to a street or sidewalk. Check with the City of Portland before your delivery date, and see our porta potty permit requirements page for related sanitation permit basics that often come up on the same job.
As long as your project runs, though pricing shifts favorably the longer you commit. A week-long rental costs more per day than a month-long one, so if your timeline is uncertain, ask about extending rather than booking short and renewing repeatedly. Monthly terms usually work out cheaper overall for jobs running past a few weeks.
Some units do, others don't. A mobile office trailer with bathroom setup adds plumbing and a holding tank, which needs periodic service just like a standalone unit. Most crews still run separate crew toilets since office bathrooms aren't built for high daily traffic across a full workforce.
An office trailer is workspace: desks, plan tables, sometimes a small bathroom. A restroom trailer rental is built entirely around plumbing and stalls, sized from 2 stall up to 8 stall layouts for events or larger crews.
Yes. Day and weekend terms exist for exactly this. A short job doesn't need the same footprint as a multi-month build, and a smaller trailer sets up faster with less ground prep required.
Yes. Portland Porta Pros delivers mobile office trailer rental across Portland and the surrounding metro, with same-day and next-day drop-off available on most orders.
Pricing depends on the unit and how long you need it. See our cost breakdown and request a free quote for an exact figure.
Standard rentals include scheduled service — a pump-out, a clean, a restock and fresh deodorizer. Busy or hot-weather sites can be serviced more often.
Call now or request a free quote — clean units, on-time delivery, transparent pricing.
