What Can We Build For You?
ZSM General Contractor Services
As experienced general contractors, we manage everything from permits through final inspection—custom homes, remodels, and commercial projects.
Custom Home Building
We build custom homes from foundation through final inspection. Site prep, framing, mechanical systems, and finishing work handled by licensed professionals.
Residential Remodeling
Our residential remodeling covers single rooms through whole home renovations. We handle kitchen remodels, bathroom renovations, whole home remodels, basement remodeling, home additions, main floor remodeling, and exterior work.
Commercial Construction
We manage commercial construction throughout Sonoma County and Marin County—office buildings, retail spaces, restaurants, warehouses, tenant improvements, and commercial remodeling.
Why Choose ZSM Construction Co.
Learn more about ZSM Construction Company.
Complete project management
Transparent pricing
Licensed crews
Quality materials
Direct communication
Frequently Asked Questions
Getting Started
How do I know which service I need?
Building on vacant land = custom home. Updating existing home = remodeling. Business property = commercial. Call (707) 849-1961 if you’re not sure.
Do you offer free consultations?
How long for an estimate?
Remodeling: 1-2 weeks. Custom homes: 2-4 weeks. We review plans, visit site, price everything accurately.
What areas do you serve?
Sonoma County and Marin County—Santa Rosa, Petaluma, Healdsburg, Sebastopol, Rohnert Park, Windsor, Sonoma, San Rafael, Novato.Relocating to California? We help clients moving from out of state plan projects before arrival.
Are you licensed and insured?
Yes.Fully licensed, bonded, insured in California. Copies available on request.
Project Planning
How much will my project cost?
Custom homes: $400-600/sq ft. Kitchen remodels: $30,000-100,000+. Bathroom remodels: $15,000-50,000+. Written estimates after plan review and site visit.
Can you work within my budget?
Do I need permits?
Most projects require permits. We handle applications, submit plans, schedule inspections, ensure California Building Code compliance.
How do payments work?
What if I want changes during construction?
Project Timelines
How long does a custom home take?
12-18 months for most homes. Larger homes, complex sites, extensive custom work takes longer. Weather affects foundation and framing schedules.
How long does a remodel take?
Kitchens: 6-8 weeks. Bathrooms: 4-6 weeks. Whole home: 3-6 months. Detailed schedules provided at consultation.
Can I live in my house during remodeling?
What causes delays?
Do you work year-round?
Quality & Process
How do you ensure quality?
What warranties do you provide?
One-year workmanship warranty. Material warranties vary by manufacturer—we help register products, maintain documentation.
Are your subcontractors licensed?
How often will you communicate?
Weekly updates by phone or email. Visit site anytime during work hours. Walkthroughs scheduled for major milestones.
What if I have concerns?
Call or email immediately. Project manager responds within 24 hours on weekdays.
Customer Reviews
Visit our reviews page to read client experiences.
Contact ZSM Construction Co.
Ready to start? Contact ZSM Construction Co. at (707) 849-1961 for a free consultation. We’ll review plans, visit your site, provide detailed estimate.
Service Areas
We work throughout Sonoma County and Marin County—Santa Rosa, Petaluma, Healdsburg, Sebastopol, Rohnert Park, Windsor, Cotati, Sonoma, San Rafael, Novato.Relocating to Northern California? We help clients moving from out of state plan projects before arrival.