Steel Frame Modular Buildings
Durable, scalable and code-compliant structures with engineered steel chassis—delivered 30–50% faster than site-built construction.
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High-Performance Modular Buildings, Delivered Fast
Steel frame modular and custom container structures—designed, engineered and factory-built by one team.
Custom Container Structures That Stand Out
Bold, code-compliant builds for retail, food & beverage and brand experiences.
Scalable From One Unit to Full Developments
Multi-site rollouts and container parks, built in our Houston factory.
Engineered for Remote & Extreme Sites
From mountain summits to Caribbean islands—delivered and installed.
40,000 sq. ft.Houston manufacturing facility
30–50%Faster than traditional construction
100%In-house design, engineering & fabrication
2024 & 2025Modular award recognition
What We Build
Modular Construction Services for Commercial Buyers
Four ways to build with ROXBOX—each backed by in-house architects, engineers and fabricators working from a single factory floor.
Custom Container Structures
Bold, flexible builds for retail, events and food & beverage—designed to stand out and deployed quickly.
See container projects →
Pre-Designed Models
Start from a proven modular template, then customize the layout, finishes and systems to local code requirements.
Browse models →
Renewable Energy Solutions
Add off-grid capability with Helios Solar Models and a Battery Energy Storage System (BESS) for remote or resilient sites.
Off-grid solar guide → Who We Are
A Design / Build Modular Construction Firm
ROXBOX specializes in steel frame structures and custom container buildings for fast-moving industries. With a 40,000 sq. ft. manufacturing facility in Houston, a design studio in Denver and a proudly employee-owned team of architects, engineers and fabricators, we control quality from first sketch to final installation.
For procurement teams, that means one contract, one accountable partner and fewer handoffs between design, factory and site.
- Concept Design
- Architecture & Engineering
- Code Compliance, Permitting & Inspections
- Offsite Factory Construction
- Construction Management
- General Contracting
- Quality Control & Assurance
- Delivery & Installation
How It Works
From Concept to Installation in One Workflow
Factory fabrication runs in parallel with site preparation—the core reason modular projects open weeks, not months, sooner.
- 01
Concept & Feasibility
Program, site review, budget alignment and model selection.
- 02
Architecture & Engineering
Stamped drawings, structural and MEP design by our in-house team.
- 03
Permitting & Compliance
Code review, approvals and third-party inspections managed for you.
- 04
Factory Construction
Precision fabrication and QA/QC in our climate-controlled Houston plant.
- 05
Delivery & Installation
Transport, crane set and final connections—ready for operation.
Why ROXBOX
Your Modular Partner Every Step of the Way
Faster ROI
Get your structure up and running in weeks—not months—so revenue starts sooner.
Scalable
From single-unit builds to multi-unit buildings and large-scale developments.
Nationwide & Beyond
Licensed in key states with coast-to-coast delivery and projects as far as the Bahamas.
In-House Team
Architecture, engineering and manufacturing under one roof—no finger-pointing between vendors.
More Control
Factory-built quality means less weather risk and less onsite disruption to your operations.
Trusted by Leaders
Chosen by brands such as Nike, Live Nation, Coca-Cola and Aspen Snowmass.
Steel Frame Modular Applications
Purpose-Built for High-Stakes Sectors
Where speed to open, brand consistency and logistics complexity matter most.
Hospitality
Lodges, beach clubs, guest amenities and resort facilities built to premium finish standards.
Hospitality solutions → Quick Service Restaurants
Repeatable, drive-thru-ready prototypes that let national brands roll out multiple locations fast.
QSR solutions →
Islands & Remote Sites
Shipped complete, installed with minimal local labor and optionally powered by solar + storage.
Remote solutions → Who We Serve
Modular Solutions Built for Bold Builders
We partner with forward-thinking businesses, developers and creatives who value modular construction done right. Whether you are scaling a national brand or bringing a one-of-a-kind space to life, our team delivers structures that are efficient, durable and built to move with you.
- Quick Service Restaurants
- Commercial Developers
- EPC, Industrial & Energy Firms
- Event Venues & Experiential Brands
- Architects & Design Teams
- Hospitality & Resort Operators
Project Map
Built Where You Are
From single mobile units to multi-site rollouts, ROXBOX projects are at work across the country and beyond. Explore container and steel frame modular builds on our interactive map—each with photos, specs and the story behind it.
Explore the Map →
Client Trust
Trusted by Leading Brands
Case Studies
Real-World Results, Designed & Built by ROXBOX
Three projects that show how modular solves very different challenges: altitude, island logistics and seasonal urban retail.
Aspen Snowmass — The Cabin
Aspen Skiing Company overhauled the Lynn Britt Cabin, a mid-mountain lodge, using factory-built modules craned to a high-altitude site with a short construction window.
Coconut Club — Solar-Powered Beach Club
A complete beach club experience shipped to the Bahamas and powered by solar energy—proof that modular performs where local labor and grid access are limited.
Detroit Holiday Market Pop-Up Retail
Commissioned via Groundswell Design Group for Bedrock Detroit and the Gilbert Family Foundation, these retail huts transformed Cadillac Square for the holiday season.
Buyer's Guide
Steel Frame Modular vs. Container vs. Site-Built
A quick framework to help procurement and development teams choose the right building system.
| Criteria | Steel Frame Modular | Shipping Container Structure | Traditional Site-Built |
|---|---|---|---|
| Schedule | 30–50% faster; factory and site work run in parallel | Fastest for compact, repeatable units | Sequential; exposed to weather and labor delays |
| Design flexibility | Custom spans, heights and multi-story layouts | Defined by ISO container dimensions | Fully flexible, highest cost of change |
| Best for | Hospitality, QSR, developments, remote islands | Retail, bars, concessions, events, activations | Large, one-off permanent buildings |
| Quality control | Controlled factory environment with QA/QC | Controlled factory environment with QA/QC | Varies by site conditions and trades |
| Relocation | Possible depending on design | Highly transportable | Not relocatable |
| Off-grid option | Solar + battery storage integration | Solar + battery storage integration | Project-specific |
Every project is engineered individually; final specifications depend on site, code jurisdiction and program.
FAQ
Questions Buyers Ask Before Building Modular
What is the difference between steel frame modular and shipping container buildings?
Steel frame modular buildings use purpose-engineered steel chassis sized to the project, enabling wider spans, larger footprints and multi-story configurations. Shipping container buildings repurpose ISO containers for a bold industrial look and rapid deployment. ROXBOX designs and manufactures both under one roof, so we can recommend the system that fits your program—not the one we happen to sell.
How much faster is modular construction with ROXBOX?
Our steel frame modular structures are typically delivered 30–50% faster than traditional construction because modules are fabricated in our Houston factory while foundations and utilities are prepared on site.
Can ROXBOX deliver projects outside the continental United States?
Yes. ROXBOX projects are at work across the country and beyond—including the solar-powered Coconut Club in Exuma, Bahamas. Shipping, logistics and installation support are scoped for each project.
Are ROXBOX buildings code compliant?
Yes. Our in-house architects and engineers handle code compliance, permitting and inspections, and each pre-designed model can be customized to meet local code requirements.
Can a modular building operate off-grid?
Yes. ROXBOX can integrate Helios Solar Models and a Battery Energy Storage System to add off-grid capability—ideal for islands, remote sites and operations that need resilient power.
Ready to Build Smarter?
Whether you are expanding across regions or designing your first modular location, ROXBOX makes the process fast, efficient and reliable.