Custom-built Mobile-Stor unit mounted on a tandem-axle with generator compartment
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Customized Solutions — Built to Your Exact Requirements

Not every job fits a standard unit. When your project demands something built to spec — a mobile lab, a field command station, a power unit, or a specialty workspace — Mobile-Stor designs and builds custom units from the ground up.

We've built custom units for healthcare providers, mining and oilfield operations, research organizations, and contractors who needed a solution that didn't exist off the shelf. Tell us what you need — we'll build it.

Built In Billings
Our Own Shop
Configuration
Fully Custom
Applications
Lab, Office, Power & More
Delivery
Statewide

What We Build

Every custom unit starts with a conversation about what you actually need. We've handled a wide range of configurations — here's what our shop has built.

Mobile laboratories with casework, sinks, and climate control
Field command and communications units
Generator and power distribution units
Medical and healthcare screening stations
Specialty office units with custom layouts
Oilfield and mining service units
Custom-wrapped branded units for events and deployments
Multi-function units combining office, storage, and utility space
From Our Shop

Custom Builds — Inside and Out

Every custom unit is designed, framed, insulated, wired, and finished in our Billings shop before delivery. The result is a purpose-built unit ready to work from day one.

20-Foot On-Ground Office

Front exterior of a custom 20-foot on-ground office
Rear exterior of a custom 20-foot on-ground office
Custom 20-foot office interior with an L-shaped desk
Custom 20-foot office interior with built-in desk and file drawers
Storage section of a custom 20-foot office unit

8' × 12' Gravel Pit Control Office

Exterior of a custom 8-by-12-foot gravel pit control office
Windowed exterior of a custom gravel pit control office
Entry to a custom gravel pit control office
Control office interior with wraparound windows and desk
Climate-controlled interior of a gravel pit control office

8' × 20' Mine Laboratory

Exterior of a custom 8-by-20-foot mine laboratory
Custom mine laboratory interior with cabinets and sink
Sink and work surface inside a custom mine laboratory
Workbench and storage inside a custom mine laboratory

8' × 40' Highway Laboratory

Exterior of a custom 8-by-40-foot highway laboratory
Main work area inside a custom highway laboratory
Reverse interior view of a custom highway laboratory
Connected work rooms inside a custom highway laboratory
Office area inside a custom highway laboratory

8' × 40' Office With Bathroom

Exterior of a custom 8-by-40-foot office with bathroom
Finished office area inside a custom 8-by-40-foot unit
Bathroom vanity and toilet inside a custom office unit
Water storage system inside a custom office with bathroom
Water heater and plumbing system for a custom office bathroom

8' × 40' OSB Interior

Exterior of a custom 8-by-40-foot unit with an OSB interior
Full-length OSB-lined interior of a custom 8-by-40-foot unit
OSB-lined interior viewed through the open cargo doors of a custom 8-by-40-foot unit

8' × 40' Door and Window Installation

One side of a custom 8-by-40-foot unit with multiple installed doors and windows
Opposite side of a custom 8-by-40-foot unit with multiple installed doors and windows

8' × 20' Radio Tower Build

Generator side of a custom 8-by-20-foot radio tower support unit
HVAC side of a custom 8-by-20-foot radio tower support unit

8' × 40' Shelf Bracket Build

Exterior of a custom 8-by-40-foot shelf bracket storage unit
Interior of a custom shelf bracket unit with personnel door, lighting, and electrical service
Installed heavy-duty shelf brackets inside a custom 8-by-40-foot storage unit
Shelf bracket storage interior viewed through open cargo doors

How the Custom Build Process Works

We keep it simple. No layers of project managers or national call centers — just a direct conversation with the people building your unit.

01

Tell Us What You Need

Call or submit a quote request. We'll ask about the application, interior requirements, utility needs, size, and delivery location. No RFP required — just a conversation.

02

We Design & Quote

Our team puts together a build scope and quote based on your requirements. We'll walk you through the plan and make adjustments before any work begins.

03

Built in Billings, Delivered to You

Every custom unit is built in our Billings shop. When it's done, we deliver it directly to your site, ready to connect and operate.

Customized Unit Questions

What makes a unit 'custom'?

Custom units are containers or office units that have been purpose-built or significantly modified to serve a specific function — specialty interiors, unique floor plans, built-in workstations, custom exterior finishes, or purpose-specific layouts. If a standard office or storage unit doesn't fit your use case, a custom build might.

What types of configurations are available?

We've built and modified units for mobile command centers, field offices with specialized equipment, ADA-accessible units, and purpose-built work environments. Tell us what you need the space to do and we'll work from there.

How long does a custom build or modification take?

It depends on the scope of the project. Simple modifications can often be done quickly; full custom builds take longer. When you request a quote, we'll give you a realistic timeline based on what you're asking for.

Can I rent a custom unit, or is it purchase only?

Both options are available depending on the unit and configuration. Some custom units are available for rental; others may be built to purchase. We'll walk you through what makes sense for your situation when you call.

What's the first step to getting a customized unit?

Call us at (406) 259-9175 or fill out the quote form below. Describe what you need the unit to do — dimensions, function, any specific features — and we'll get back to you with options and a quote.

Request a Custom Quote

Describe what you need and we'll get back to you with options. There's no obligation — just a straightforward quote from people who build this stuff every day.

We respect your privacy. Your information is used solely to provide a quote.