The Smart Shopper’s Guide to Comparing Shipping Container Building Bids
When you’re shopping for a shipping container building, not all builders — or bids — are created equal. It’s easy to compare based on price alone, but that can be a costly mistake if you’re not asking the right questions.
Here’s a comprehensive guide to ensure you’re comparing apples to apples, and not getting shortchanged on quality, safety, or performance.
1. Will the Building Be Permitted?
🚨 Why it matters: Getting a building permitted adds cost and time — but it also ensures it’s legal, safe, and built to code. Some builders skip this step to keep prices low, but it could cost you big later.
Ask: Is this bid for a permitted or non-permitted building?
Red Flag: If one builder’s price is way lower, they may not be including permitting or inspections.
2. What Type of Insulation Is Being Used?
🧊 Why it matters: Insulation affects comfort, energy efficiency, and HVAC performance. Cheap insulation can lead to moisture problems, mold, and premature equipment failure.
Ask: What type of insulation are you using? What’s the R-value?
Look For: Double barrier insulation (like R-6), which prevents moisture buildup between container walls and fiberglass insulation.
3. HVAC System Type
❄️ Why it matters: Some builders use inexpensive window HVAC units that are loud, inefficient, and short-lived.
Ask: Are you installing a window unit or a mini split system?
Pro Tip: A quality mini split system can last 10–20 years and be much more efficient and quiet.
4. Interior Wall & Ceiling Materials
🛠️ Why it matters: Budget builders may use paneling or thin wall board instead of real drywall with texture and paint.
Ask: What interior materials are included? Is it painted, finished drywall?
5. Doors and Windows
🚪 Why it matters: Exterior doors need to withstand weather. Some builders cut corners with interior doors used outside — not safe or durable.
Ask: Are the exterior doors industrial-grade? Are windows energy-efficient?
6. Builder Credentials
👷 Why it matters: Licensed and certified builders follow strict safety, labor, and construction standards.
Ask: Are you a state-certified builder? Do you carry general liability and workers’ comp insurance? Do you follow a quality control manual?
7. Warranty Coverage
🧾 Why it matters: A solid warranty protects your investment.
Ask: What warranty do you offer on workmanship and individual components?
8. Experience & Project Complexity
🧠 Why it matters: Simple builds are one thing, but for complex projects, you need a builder who can solve problems quickly and has seen it all before.
Ask: How many similar projects have you completed? Can you share photos, references, or arrange a site visit?
9. Scope of Work – What’s Included?
📋 Why it matters: One bid might include everything; another might leave out appliances, finishes, or engineering.
Ask:
Does the bid include HVAC, appliances, cabinetry, and finishes?
Are design or engineering services included?
Does this include Title 24 or energy code compliance?
Are city/county fees and permits included?
10. Foundation and Finishes
🏗️ Why it matters: A complete bid should account for the foundation, tile work, waterproofing, and vapor barriers.
Ask:
What kind of foundation system is included?
Is tile installation included for floors and showers?
What waterproofing standard is used?
11. Timeline & Communication
⏱️ Why it matters: Understanding who’s managing the project and what delays might arise keeps your build on track.
Ask:
What’s the projected timeline, and what could cause delays?
Who will manage the project day-to-day?
12. Payment Schedule & Change Orders
💰 Why it matters: You should know exactly when and how much you’ll pay — and what happens if you want to make changes.
Ask:
What are your payment terms?
How do you handle change orders?
Final Tip: Compare Apples to Apples
Before you make a decision, line up every bid and compare each feature side-by-side. What seems like a “deal” might be missing crucial elements — or cut corners that will cost you more down the road.