The Valley Vault
Model #3: Premium 10' x 12' Custom Western Red Cedar Gambrel Barn (180 Total Sq Ft)
High-Capacity Gambrel Barn Architecture
Dual-slope gambrel roofline maximizes vertical headroom, creating 60 sq ft of integrated overhead loft storage on top of the 120 sq ft ground footprint.
“Engineering 180 total square feet of usable storage within a 100% permit-exempt 10x12 ground footprint.”
Valley Vault Pricing & Finish Tiers
Select the finish tier matching your storage or workshop setup.
Base Shell Only
Includes pier pad foundation, heavy-duty floor joists, dual overhead loft decking, Western Red Cedar siding, and metal/shingle roof.
Semi-Finished
Includes full weather seal house wrap, double-pane vinyl windows, and electrical rough-in conduit.
Full Turnkey Finished
Fully finished high-loft workspace. Complete wall cavity insulation, drywall finish, solid oak floors, integrated loft ladder, and LED lighting setup.
Watch The Gambrel Barn Video
See our crew build the Valley Vault on-site in Yuba City.
Gambrel Barn Architecture Tour
Model #3: The Valley Vault 10x12 Gambrel Barn
Shed Building
100% Permit-Exempt Backyard Architecture
Every Boxpro Express shed model is custom designed and precision built to satisfy exact California Residential Code (CRC R105.2) and City of Yuba City Development Code guidelines for zero-permit residential installation.
120 Sq Ft Maximum Floor Area Limit
One-story detached accessory structures used as storage sheds, tool sheds, or home studios do NOT require a building permit provided the floor area does not exceed 120 square feet.
Under 12-Foot Peak Height Limitation
Permit-exempt residential accessory structures must remain 1-story with an overall height profile under 12 feet from finished grade to peak.
Pier Pad Foundation (No Permanent Concrete Slab Permit)
Structures built on high-density concrete pier pad matrices are classified as non-permanent elevated wood frame foundations, avoiding deep foundation excavation permits.
Property Line Setback & Fire Safety
Allows installation in side and rear yards provided a minimum 3-foot clearance is maintained from side/rear property lines. Real Western Red Cedar siding provides natural fire and rot defense.
Retail Manufactured Product & CSLB Minor Assembly Compliance
Boxpro Express operates as a manufacturer of modular timber shed structures sold as retail product units. On-site assembly labor performed under minor handyman limits is strictly capped under statutory California limits ($1,000 assembly allowance).
Hassle-Free Backyard On-Site Delivery & Assembly
No city plan submissions, zero architectural filing fees, and no waiting months for municipal approvals. Modular panels manufactured in-shop and delivered to your property across Yuba City, Marysville, Sutter, Plumas Lake, and Olivehurst.