STEEL BUILDING KIT GUIDE | Updated April 2026 | 11 min read
WHAT YOU’LL LEARN IN THIS REVIEW
- Who General Steel Buildings is and how they operate
- Actual price ranges for General Steel kits by size
- What’s included in a General Steel building package
- Warranty terms and what they actually cover
- BBB rating and real customer feedback summary
- Pros and cons from an independent perspective
- Who General Steel is best for (and who should look elsewhere)
- How General Steel compares to top competitors
General Steel Buildings is one of the most recognized names in the pre-engineered steel building industry, with a sales and marketing presence active for over 25 years. If you’ve searched for a steel building kit and received a quote from General Steel, you’re probably wondering whether they’re the right choice, what their pricing actually looks like, and whether their buildings hold up. This General Steel Buildings review gives you the independent, unbiased picture that General Steel’s own website won’t.
SteelBuildingKit.com does not receive referral fees or commissions from any manufacturer. For a full comparison of all major companies, see our Top 10 Steel Building Kit Companies review.
QUICK ANSWER: General Steel Buildings Review
General Steel Buildings is a legitimate, U.S.-based steel building manufacturer that sells direct to consumers. They specialize in red iron framed clear-span buildings from small garages to large commercial structures. Pricing is competitive but not the lowest in the industry, with 30×40 kits starting around $18,000–$24,000 and 50×100 kits ranging $32,000–$48,000. Their warranty is solid, customer service reviews are mixed, and they are best suited for buyers who want a well-supported purchase process rather than the lowest possible upfront price.
1. Who Is General Steel Buildings?
General Steel Corporation has been operating since the late 1990s. They are headquartered in Lakewood, Colorado, and sell pre-engineered steel buildings directly to consumers across the United States. Unlike brokers — companies that resell buildings fabricated elsewhere — General Steel operates as a direct manufacturer, meaning they design and fabricate their own steel building systems.
Company snapshot: Founded in the late 1990s (30+ years in business). Headquarters: Lakewood, CO. Building type: Red iron I-beam, clear-span framing. Size range: Small carports to 200+ foot commercial spans. Sales model: Direct-to-consumer with dedicated sales representatives.
KEY INSIGHT
General Steel is a manufacturer, not a broker. This distinction matters because manufacturers control their own fabrication quality and pricing. A broker adds a 15–30% markup while sourcing from the same manufacturers General Steel competes against. Always verify manufacturer vs. broker status before accepting any quote.
2. General Steel Buildings Pricing in 2026
Pricing varies based on size, configuration, region, and current steel pricing. Here are representative ranges based on current market data:
| Building Size | Kit-Only Price | Installed Estimate |
|---|---|---|
| 20×30 (600 sq ft) | $8,000 – $13,000 | $25,000 – $38,000 |
| 30×40 (1,200 sq ft) | $18,000 – $24,000 | $45,000 – $65,000 |
| 40×60 (2,400 sq ft) | $26,000 – $38,000 | $65,000 – $95,000 |
| 50×100 (5,000 sq ft) | $32,000 – $48,000 | $85,000 – $130,000 |
| 60×100 (6,000 sq ft) | $42,000 – $62,000 | $105,000 – $160,000 |
Use the Steel Building Cost Calculator to benchmark General Steel’s quote against industry averages for your size and zip code.
BUYER WARNING
General Steel’s initial online quotes are often lower than final purchase prices. As you configure openings, upgrades, and delivery, the final price typically increases 20–35% above the first number you see. Request a fully itemized quote before comparing General Steel to other suppliers.
3. What’s Included in a General Steel Buildings Kit
Standard components included:
- Red iron primary framing (I-beam columns and rafters)
- Secondary framing (purlins and girts)
- Anchor bolts (pre-set layout provided for your foundation pour)
- 26-gauge Galvalume steel roof and wall panels (standard)
- Roof and wall trim/flashing and ridge cap
- PE-stamped engineering drawings (standard in most states)
- Assembly manual and anchor bolt layout drawings
What costs extra: Concrete slab foundation, erection/installation labor, windows and additional walk doors beyond base package, roll-up or overhead doors, insulation, and interior finishing.
For context on what competitors include vs. exclude, see our steel building kit information, reviews and ratings page.
4. General Steel Buildings Warranty
| Warranty Item | Coverage Term |
|---|---|
| Structural framing | 50-year limited structural warranty |
| Roof and wall panels (paint) | 40-year paint warranty against peeling/cracking |
| Roof panels (Galvalume coating) | 20-year corrosion warranty |
| Hardware and fasteners | 1-year |
KEY INSIGHT
General Steel’s 50-year structural warranty is competitive and legitimate, but it is tied to proper installation by qualified personnel. Buildings assembled by DIYers without following manufacturer specifications may void structural warranty coverage. If you’re planning a DIY assembly, confirm with General Steel in writing which warranty provisions still apply.
5. BBB Rating and Customer Reviews
General Steel Corporation has a BBB accredited listing. Their rating has historically fluctuated between B and A-, with the primary complaint categories being delivery timeline delays, pricing discrepancies between initial quote and final purchase agreement, and communication gaps during the order fulfillment period.
Customer Review Patterns: Buyers who go through the full quote process carefully, ask for itemized pricing, and hire a certified erection crew consistently report positive outcomes. Negative patterns concentrate among buyers who locked in pricing without reading the full contract, or who attempted complex configurations without pre-approval.
6. General Steel Buildings vs. Competitors
| Criteria | General Steel | Worldwide Steel | Mueller Inc. | Rhino Steel |
|---|---|---|---|---|
| Manufacturer or broker | Manufacturer | Manufacturer | Manufacturer | Manufacturer |
| Price competitiveness | Mid-range | Mid-range | Budget-friendly | Premium |
| Warranty (structural) | 50 years | 50 years | Limited | 50 years |
| Lead time (2026) | 8–14 weeks | 10–16 weeks | 8–12 weeks | 10–14 weeks |
| PE-stamped drawings | Standard | Standard | Available | Standard |
| Commercial grade | Yes | Yes | Yes | Yes |
For a full breakdown on all major competitors, our best steel building kit companies comparison walks through each factor with scoring.
7. General Steel Buildings: Pros and Cons
Pros:
- Legitimate manufacturer (not a broker) — what you order is what they fabricate
- 50-year structural warranty is industry-standard and legitimate
- PE-stamped engineering drawings included as standard in most cases
- Wide size range from small garages to large commercial structures
- Established track record with 25+ years in operation
- Red iron I-beam construction at commercial sizes
Cons:
- Initial online quotes are often underpriced; final configuration adds 20–35% to total
- Delivery lead times of 8–14 weeks in 2026
- Customer service reviews are mixed; quality varies by representative
- Pricing is mid-range — not the most affordable option for budget-conscious buyers
8. Who Should Buy from General Steel Buildings?
General Steel is a strong fit if you: want a direct manufacturer with a 25+ year track record, need PE-stamped engineering documents for commercial permitting, are buying a mid-range to large building (30×40 and above), value a full-service purchase experience, or have a flexible 8–14 week lead time.
Look at other options if you: are on a tight budget (Mueller Inc. or Metal Building Depot may be better fits), need delivery within 6 weeks, or are buying a small residential structure under 30×30.
For size-specific options, see our guides on 40×60 steel building kits and 30×40 metal building kits to see how General Steel’s pricing compares at those specific sizes.
9. Common Mistakes When Buying from General Steel
| Mistake | Why It Costs You | Fix |
|---|---|---|
| Accepting the first quote without itemizing | Initial quotes exclude freight, upgrades, and add-ons | Request a full itemized quote before comparing |
| Not confirming PE-stamp inclusion | Some configurations require upgraded engineering packages | Verify PE-stamp is included for your state before signing |
| Skipping the site survey | Wrong anchor bolt layout means costly corrections | Confirm your foundation dimensions before ordering |
| Not reading the warranty exclusions | Improper installation voids structural coverage | Read the full warranty document before signing |
| Ordering too small | Buyers consistently wish they’d sized up | Add 15–20% to your current square footage need |
SteelBuildingKit.com Independent Verdict
General Steel Buildings earns a B+ rating from SteelBuildingKit.com’s independent review process. They are a legitimate manufacturer with a solid structural warranty and established industry presence. The main friction points are pricing transparency and variable customer service quality. Buyers who request itemized quotes, understand warranty terms, and hire a certified erection crew consistently report positive outcomes.
See our full manufacturer directory and Top 10 Steel Building Kit Companies for how General Steel ranks against all major players.
Article Summary
- General Steel Buildings is a direct manufacturer, not a broker, with 25+ years in operation.
- Pricing is mid-range: 30×40 kits start at $18,000–$24,000; 50×100 kits run $32,000–$48,000.
- Their 50-year structural warranty is legitimate but requires proper installation to remain valid.
- BBB rating is accredited; most complaints relate to delivery delays and pricing discrepancies.
- PE-stamped engineering drawings are standard in most states.
- Lead times are 8–14 weeks in 2026.
- Best for buyers in the 30×40+ size range who want a full-service manufacturer relationship.
- Not the best fit for budget buyers or anyone needing sub-6-week delivery.
- Always request an itemized quote and compare delivered price, not base kit price.
- SteelBuildingKit.com independent rating: B+
Frequently Asked Questions About General Steel Buildings
Is General Steel Buildings a legitimate company?
Yes. General Steel Corporation is a legitimate, accredited manufacturer headquartered in Lakewood, Colorado, with over 25 years of operation. They are a direct manufacturer, not a broker. They carry BBB accreditation and provide PE-stamped engineering drawings as standard.
How much does a General Steel building cost?
General Steel pricing depends on size and configuration. A 30×40 kit starts around $18,000–$24,000; a 40×60 runs $26,000–$38,000; a 50×100 ranges $32,000–$48,000. Installed costs are significantly higher when you add foundation, erection labor, insulation, and doors. Use our Steel Building Cost Calculator to model your total project cost.
What warranty does General Steel offer?
General Steel offers a 50-year limited structural warranty, a 40-year paint warranty on roof and wall panels, and a 20-year Galvalume corrosion warranty. The structural warranty is tied to proper installation; DIY builds or improper assembly may affect coverage.
How long does General Steel take to deliver a building?
In 2026, General Steel’s typical lead time is 8–14 weeks from signed purchase agreement to delivery. Complex configurations can push this to 16 weeks. Plan your project timeline accordingly and account for site preparation and permitting ahead of kit delivery.
Is General Steel better than Mueller Inc. or Worldwide Steel?
It depends on your priorities. General Steel has a stronger warranty and full-service purchase experience; Mueller is typically less expensive for budget-focused buyers; Worldwide Steel offers more flexibility for custom configurations. Our Top 10 Steel Building Kit Companies reviews all three side-by-side with independent scoring.