Prefabricated Steel Frame Kits

Ready-to-assemble LGS frame kits for backyard offices, saunas, garages, and full ADUs. Delivered across California. Under 120 sq ft — no permit needed!

Choose Your Frame Kit

120 sq ft prefabricated backyard office frame kit SALE
Backyard Offices

Office — 120 sq ft LGS Frame Kit

$7,500 $7,200

Frame kit only. No permit required.

Turnkey 120 sq ft modular backyard office build POPULAR
Backyard Offices

120 sq ft Backyard Office — Turnkey

$26,999

Fully finished. No permit required.

Modular LGS gym studio interior with fitness equipment
Studios

Gym Studio — 120 sq ft LGS Frame

$26,999

Perfect for home gym or yoga studio.

LGS sauna and lounge room frame kit
Saunas / Bath Houses

Modern Sauna with Lounge Room — 160 sq ft

$34,000

LGS frame kit. Assembly included upon request.

Modern 2-car steel frame garage kit
Garages

Modern 2-Car Garage — 308 sq ft

$68,000

Steel frame construction. Heavy-duty.

450 sq ft turnkey ADU or backyard office PREMIUM
ADU / Turnkey

Turnkey ADU or Backyard Office — 450 sq ft

$139,000

Full-size living space. Everything included.

Want to Customize Your Kit?

Whether you're building a home office, gym, or garage — we can tailor a Light Gauge Steel frame kit to your exact needs.

Can I order a custom size frame kit?

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Yes! Just contact us with your desired dimensions and usage — we'll prepare a personalized quote and 3D concept.

Do you offer assembly services?

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Absolutely. If you prefer a hassle-free experience, our licensed team can deliver and assemble your structure on-site.

What's included in each kit?

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Each kit includes galvanized LGS framing, fasteners, drawings, and assembly instructions.

Do I need a foundation?

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Yes. All our LGSF buildings require a solid, level foundation — typically a concrete slab. We can help design and build it upon request.

Can you handle finishing (insulation, drywall, siding)?

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Yes. Our team can handle insulation, drywall, siding, windows, doors, flooring, and more. Just ask us for a full-service quote.

Do I need a permit?

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If your structure is under 120 sq ft and not intended for habitation (like a storage shed or small workshop), you usually do not need a permit in most California cities. For anything larger, a permit is required. We can assist with the permitting process.

Ready to Order Your Frame Kit?

Contact us to place an order or request a custom quote. Delivery available across California.