20ft Standard Pre-Owned Steel Container
From $1,450 / unit
Certified compact unit for quality conversions —
The 20ft Standard Cargo Worthy container gives you a structurally certified 150 sq ft shell that fits neatly on tight residential lots across St. Petersburg. With CSC certification confirming the integrity of walls, roof, floor, and corner castings, this unit satisfies the structural requirements that matter most when pulling permits for a conversion project.
An excellent starting point for pool house builds, backyard barber shops, personal gyms, and small retail kiosks in Pinellas County. The compact 20-foot length often falls within setback allowances that would rule out larger containers, making it the practical choice for properties with limited yard space. Minor surface wear disappears once the interior is framed out.
At $1,450, you get a certified steel building envelope for less than the cost of a pre-fab shed — and with a lifespan that outlasts wood construction by decades. Add insulation, run your electrical, and you have a climate-controlled space that holds its value far better than any temporary structure.
Technical Details
~150 sq ft
of usable floor space
8'6" Tall
standard height profile
4,916 lbs
tare weight
Modification Advantages for Building Projects
The 20ft Standard ranks among the most versatile containers for conversion work. Here is what makes it a preferred starting point for builders and property owners:
- Roughly 150 sq ft of habitable floor area — room for a complete one-bedroom layout including kitchen, bathroom, and lounge
- 7'10" raw interior ceiling — standard height suitable for workshops, storage, and office conversions
- Weathering steel (Corten) shell — self-protecting steel that forms a rust-resistant patina, engineered to endure 25-50+ years along Florida's Gulf Coast
- Works with conventional framing — inner measurements support standard 2x4 stud walls paired with closed-cell foam, so any licensed contractor can handle the job
- Full-width rear doors — keep them for a statement entrance, swap them for floor-to-ceiling glazing, or seal and reframe for additional wall area
- 28mm marine plywood subfloor — delivers a flat, sturdy base ready to accept any final flooring finish
- Modular and stackable — arrange units side-by-side or on two levels to form multi-room or two-story configurations
Did You Know?
Converting a 20ft Standard typically runs 40-60% below the cost of conventional stick-frame construction for equivalent square footage. Across St. Petersburg, property owners are turning to container-based ADUs (Accessory Dwelling Units) to earn rental income or provide housing for family.
Florida has become increasingly ADU-friendly, with new legislation making it easier to add a container-based dwelling to your property.
Understanding the Cargo Worthy Classification
Cargo Worthy (CW) is the most frequently selected grade for container modification work. A CW-rated unit has undergone inspection and received certification confirming it remains structurally adequate for transoceanic freight transport — meaning it far exceeds the demands of a fixed-position structure.
Expect typical service marks such as light surface oxidation, small dings, and general cosmetic patina. The load-bearing framework — floor, wall panels, roof deck, and corner fittings — stays fully intact. Each CW unit ships with a current CSC (Convention for Safe Containers) plate, confirming it cleared a formal structural review.
For renovation builds, Cargo Worthy frequently offers the strongest return on investment: surface blemishes become a non-issue once the exterior is painted or clad and the interior is framed and insulated. The result is a certified, structurally reliable building envelope at a considerably lower price than a One-Trip unit.
Cargo Worthy Grade Includes:
- Valid CSC certification
- Structurally sound walls & roof
- Intact floor (no holes)
- Working cargo doors
- Wind & water tight
- Corner castings intact
Certified for international shipping (ISO/CSC). Passed structural inspection. Working cosmetic wear — minor dents and surface patina. The best balance of quality and value for conversion projects.
Common Build Applications
St. Petersburg owners use the 20ft Standard for these projects
Compact Dwelling
Complete one-bedroom layout with cooking, bathing, and living zones
Accessory Unit / In-Law Suite
Yard-based living quarters for relatives or rental revenue
Private Home Office
Dedicated workspace separated from your main residence
Maker Studio
Steel-enclosed space for carpentry, crafts, or hands-on hobbies
Short-Term Rental
Eye-catching getaway unit with contemporary, photo-ready design
Delivery Information
St. Petersburg & Tampa Bay Delivery
- Typical delivery: 3-7 business days from order confirmation
- Method: Tilt-bed truck — container slides directly onto your prepared site
- Site requirements: Flat, level surface with clearance for an 18-wheel truck to maneuver
- Service area: St. Petersburg, Tampa, Clearwater, Pinellas County, Hillsborough County, Largo, Gulfport, Treasure Island, Pinellas …
- Delivery cost: Varies by distance — included in your free quote
- Scheduling: We coordinate a delivery window that works for you
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