Pre-engineered commercial and industrial steel buildings for Northern California businesses. Warehouses, workshops, hangars, and agricultural structures — designed, permitted, and erected by locals who know Sonoma County.
Pre-engineered metal building systems for every commercial and industrial need — designed to your specs, engineered for Sonoma County's seismic and wind requirements, and built by an experienced local crew.
Clear-span steel warehouse buildings with high eave heights, dock-high doors, skylights, and full insulation packages. Designed for storage, logistics, and distribution operations across Sonoma County.
Heavy-duty pre-engineered steel structures for fabrication shops, auto service centers, machine shops, and light manufacturing — with crane-ready framing, bay doors, and high eave options.
Office, retail, and mixed-use steel buildings with architectural wall panels, glass storefronts, custom mezzanines, and interior buildouts — designed to meet California commercial code.
Equipment storage, hay barns, livestock shelters, winery storage, and multi-bay agricultural buildings built for Sonoma County farms, ranches, and vineyards. Engineered for California ag loads.
Wide clear-span hangars with bi-fold or hydraulic doors sized for single-engine through multi-engine aircraft. Designed to meet FAA standards, local fire codes, and Sonoma County building requirements.
Upgrade your existing metal building with new roof panels, wall systems, spray foam or blanket insulation, and structural retrofits for seismic compliance under California's current building code.
Copeland Steel Buildings handles every phase of your project — from initial design and engineering through Sonoma County permitting, foundation, and final erection. One team, one contract, zero runaround.
Talk to a builder today (707) 210-1485Design, engineering, permitting, foundation, structural erection, and interior finishes — one contract, one point of contact. We own every phase so nothing falls through the cracks.
We know Sonoma County building codes, California seismic requirements (CBC), fire zone restrictions, and permitting processes inside and out — saving you time and costly revisions.
Detailed line-item proposals with no hidden fees, change-order surprises, or bait-and-switch pricing. Our online quote builder gives you a real budget estimate upfront.
Pre-engineered steel buildings erect 30–50% faster than comparable conventional construction. Most Copeland projects are occupied in 8–16 weeks from permit approval.
Based in Petaluma, we serve commercial and agricultural clients throughout Sonoma County, Marin County, Napa County, and the broader North Bay — with projects considered throughout Northern California.
Call us for a free consultation. We'll discuss your building needs, site conditions, and timeline — no pressure, no obligation.
(707) 210-1485 Get an Online Estimate →Everything you need to know before starting your steel building project in Sonoma County or the North Bay.
Configure your building and get a ballpark price range in under 2 minutes. Our team will follow up with a detailed line-item proposal — no obligation, no pressure.
A selection of completed commercial, industrial, and agricultural steel buildings across the North Bay.
Ready to start your project? Call us, send an email, or stop by our Petaluma office. A builder — not a sales rep — will answer your questions.
15 Copeland Street
Petaluma, CA 94952
Monday – Friday: 9:00 AM – 5:00 PM
Saturday – Sunday: Closed
Sonoma, Marin & Napa Counties — projects considered throughout Northern California
CA Contractor License #XXXXXXX
Fully Bonded & Insured