Offices

Portable Office Buildings

Custom-built office units that give you flexible, finished workspaces - wherever you need them.

Why Choose an Office Building

Our portable offices are designed for flexibility and comfort, offering a fully finished workspace wherever your business needs it. Whether on a job site, remote property, or temporary setup during renovations — we’ll deliver a custom unit built to your specs.

Use a simple bullet list to explain benefits:

  • Fully finished interior
  • Insulated for all seasons
  • Delivered ready to use
  • Custom sizes and layouts
  • No property tax increase in most areas

Portable offices are often treated as business equipment – meaning they can offer tax advantages and avoid adding to your property value.

Design Your Own Office

1. Choose your Package

We offer a variety of office options, giving you a compact but functional space for on-site work, planning, or running your business.

2. Customize the Look

Finish your office with the features you need to stay productive and comfortable.

3. Place Your Order

Once your design is ready, we’ll handle the rest. Your storage unit will be built to spec and delivered in a few weeks.

1. Choose Your Package

The high-quality interior framing of an Amish-built shed, showing the sturdy wall studs and construction before finishing.

Standard
Shell

$5,450

A ready-to-finish shell, perfect for the DIYer.

Includes:

  • 8×20 Structure
  • 2 (30″ x 36″) Windows
  • 36″ Insulated Door
A finished metal portable office installed perfectly on a new foundation, demonstrating our complete site prep and installation services.

Comfort Package

$10,600

Includes essential comforts for a four-season workspace.

Includes Everything from Standard, PLUS:

  • Insulated Walls & Ceiling
  • Interior Paneling
  • Professional Electrical (4 outlets, 6 can lights)
Green Office Building

Turn-Key Office

$15,400

The complete, move-in ready office with all features.

Includes Everything from Comfort, PLUS:

  • Luxury Vinyl Plank Flooring
  • High-Efficiency Mini Split
  • Spray Foam Insulated Floor

2. Customize the Look

3. Place Your Order

Once you’ve chosen your size and customizations, just reach out to finalize your order. We’ll deliver your unit in 4–8 weeks, set it in place, and handle everything for you. Delivery is available across the region. We’ll provide a delivery quote and make sure you’re ready before arrival.

See Real Customer Units in Action

Get ideas and see how other customers designed their own storage units. From small job-site boxes to multi-unit setups, our gallery shows it all.

Have Questions? Contact Us!

    contacts

    Location

    50 Mill St, Christiana, PA 17509

    Email

    Sam@MillRunStorage.com

     

    Call 24 Hours

    717.962.0997