CAT CLASS: HQ-10886

Up to 320 sq ft Mobile Office Trailer

The up to 320 sq ft mobile office trailer is the entry size in the mobile office category, designed for one or two people and a plan table on sites with limited space. These units—typically 8×20 or 8×16 configurations—deliver basic climate-controlled workspace where a full-sized modular building cannot fit. Above this size, the 320–600 sq ft class adds separate workstations and meeting space for larger site teams.

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Cat classes

Pick a size class — capacity and reach differ across the range.

Key specifications

Specification	Typical range	What it means
Floor area	128–280 sq ft	Workable space for one or two desks, plan storage, and interior circulation
Maximum height	16–32 ft (4.9–9.8 m)	Overall transport height including chassis, hitch, and any roof-mounted HVAC
Footprint	8×16 to 8×20 ft	Narrow profile fits between existing structures and utility corridors

How to choose

Up to 320 sq ft mobile office trailers are the standard choice when site footprint is constrained and only one or two supervisors need covered workspace. The compact dimensions allow placement in alleyways, between buildings, or on partially completed pads where a larger unit would block access. When the project requires separate desks for three or more people, dedicated meeting space, or distinct office and storage zones, the 320–600 sq ft class becomes necessary.

What this size handles

Urban renovation sites with narrow street access and no staging area for larger modular units
Residential subdivision phases where one superintendent manages daily trades
Utility repair projects requiring temporary field office near the work zone
Small industrial maintenance shutdowns with a single crew lead and plan table
Retail tenant improvement jobs where on-site coordination space must fit within the lease line
Pipeline or linear infrastructure projects that relocate the office every few weeks

Safety & operation

Egress doors must remain unobstructed; compact interiors leave minimal space for stored materials
Anchoring or tie-down straps required in high-wind regions to prevent trailer movement
Ground-fault protection necessary for any exterior outlets or temporary extension cords
Leveling and blocking must be verified before occupancy to prevent door binding and ensure HVAC drainage

Transport & logistics

Towed to site on integral tandem-axle trailer chassis; typically requires Class 3 or larger tow vehicle
Low overall height and short length allow navigation through residential streets and congested job sites
Some units ship on flatbed trailers and are crane-set or forklift-placed onto permanent blocking

Power & supply

Most units accept single-phase 120/240V shore power via twist-lock or RV-style connector for lighting and HVAC
Electrical panel capacity typically 100 A or less, sufficient for office loads and window air conditioning
Generator backup is standard practice on sites without utility service or during pre-energization phases

Frequently asked

How many people can work full-time in a unit this size?

One to two people comfortably. A typical 8×20 layout accommodates two desks, a plan table, and minimal storage; three or more occupants require the next size class.

What site preparation does this trailer size require?

A level, compacted gravel or asphalt pad approximately 10×25 ft to allow door swing, hitch clearance, and utility connections. Soft soil requires additional matting or blocking.

Can these units stack or connect to form larger complexes?

Most trailers in this size range are designed as standalone units. Multi-unit complexes and vertical stacking typically begin at the 320 sq ft threshold with purpose-built modular sections.

Compare popular models

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Normalised to the same units. A dash means the figure was not published.

Model	Load capacity	Max height
Pac-Van 8 x 16 Mobile Office	-	16 ft (4.9 m)
Pac-Van 8 x 20 Mobile Office All Office	-	20 ft (6.1 m)
Pac-Van 8 x 24 Mobile Office All Open	-	24 ft (7.3 m)
Pac-Van 8 x 28 Mobile Office 1 Restroom	-	28 ft (8.5 m)
Pac-Van 8 x 30 Mobile Office 1 Main office 1 Private Office	-	30 ft (9.1 m)
Pac-Van 8 x 32 Mobile Office with 1 Private Office and 1 Main Office	-	32 ft (9.8 m)