Sonoma County Construction Experts

Based in Santa Rosa, we’ve built custom homes and completed remodels throughout Sonoma County. We know local building codes, hillside regulations, and wine country property requirements. Every project is managed by licensed professionals familiar with Sonoma County’s specific standards. We serve the following Sonoma county cities: 

Sonoma County Cities We Serve

  • Santa Rosa
  • Petaluma
  • Healdsburg
  • Sebastopol
  • Rohnert Park
  • Windsor
  • Cotati
  • Sonoma
  • Cloverdale
  • Geyserville

Sonoma County Fun Fact: Sonoma County produces more wine than the entire country of Australia, despite being just one California county. The region has over 425 wineries and 60 grape varieties grown across 18 wine appellations.

What Can We Build For You in Sonoma County

Custom Home Building

Building a custom home in Sonoma County? We handle luxury custom homes, wine country estates, and new construction from site prep through final inspection. Licensed custom home builder with local crews serving properties throughout Sonoma County.
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Home Remodeling

Our residential remodeling includes kitchen remodels, bathroom renovations, whole home remodels, additions, and exterior work. Licensed crews who show up on time and finish on schedule across Sonoma County.
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Commercial Construction

Commercial construction for office buildings, retail spaces, restaurants, and warehouses. We handle planning, permits, tenant improvements, and inspections throughout Sonoma County.
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ZSM General Contractor Services in Sonoma County

As experienced general contractors serving Sonoma County, 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 across Sonoma County. Site prep, framing, mechanical systems, and finishing work handled by licensed professionals.

Luxury homes

High-end finishes, premium materials

Wine country estates

Vineyard and rural properties

New construction

Complete build from site prep

Design-build

Architectural design through construction

Residential Remodeling

Our residential remodeling covers single rooms through whole home renovations in Sonoma County. We handle kitchen remodels, bathroom renovations, whole home remodels, basement remodeling, home additions, main floor remodeling, and exterior work.

Kitchen remodels

Cabinets, countertops, appliances

Bathroom renovations

Modern fixtures, finishes

Whole home remodels

Complete property renovation

Basement remodeling

Additional living space

Home additions

Added square footage

Main floor remodeling

Open concept living

Exterior work

Decks, patios, outdoor upgrades

Commercial Construction

We manage commercial construction throughout Sonoma County—office buildings, retail spaces, restaurants, warehouses, tenant improvements, and commercial remodeling.
zsm construction commercial construction services

Frequently Asked Questions

Getting Started in Sonoma County

How do I know which service I need in Sonoma County?

Building on vacant land = custom home. Updating existing home = remodeling. Business property = commercial. Call (707) 849-1961 if you’re not sure what your Sonoma County property needs.

Do you offer free consultations in Sonoma County?

Yes. Site visit, plan review, honest assessment anywhere in Sonoma County. No charge, no obligation. Contact us to schedule.

How long for an estimate in Sonoma County?

Remodeling: 1-2 weeks. Custom homes: 2-4 weeks. We review plans, visit your Sonoma County site, price everything accurately.

What areas do you serve in Sonoma County?

We work throughout Sonoma County—Santa Rosa, Petaluma, Healdsburg, Sebastopol, Rohnert Park, Windsor, Cotati, Sonoma (Sonoma County). San Rafael and Novato (Marin County).

Are you licensed and insured in Sonoma County?

Yes. Fully licensed, bonded, insured in California. We maintain all required credentials for working throughout Sonoma County. Copies available on request.

Project Planning in Sonoma County

How much will my Sonoma County project cost?

Custom homes: $400-600/sq ft. Kitchen remodels: $30,000-100,000+. Bathroom remodels: $15,000-50,000+. Costs vary by location within Sonoma County. Written estimates after plan review and site visit.

Can you work within my budget in Sonoma County?

Yes. Tell us your budget for your Sonoma County project—we’ll recommend materials and finishes that work. Honest about what’s achievable at different price points.

Do I need permits in Sonoma County?

Most projects require permits. We handle applications, submit plans, schedule inspections, ensure Sonoma County Building Code compliance.

How do payments work for Sonoma County projects?

Deposit to start, progress payments at milestones, final payment at completion. Never full payment up front. Terms in contract, compliant with California contractor regulations.

What if I want changes during construction in Sonoma County?

Clear pricing for modifications, timeline impact explained. Everything documented, approved before proceeding on your Sonoma County project.

Project Timelines in Sonoma County

How long does a custom home take in Sonoma County?

12-18 months for most homes. Larger homes, complex sites, extensive custom work takes longer. Weather conditions in Sonoma County affect foundation and framing schedules.

How long does a remodel take in Sonoma County?

Kitchens: 6-8 weeks. Bathrooms: 4-6 weeks. Whole home: 3-6 months. Detailed schedules provided at consultation for your Sonoma County project.

Can I live in my house during remodeling in Sonoma County?

Kitchen/bathroom remodels—manageable with temporary setups. Whole home remodels—difficult. We’ll discuss options for your Sonoma County property.

What causes delays in Sonoma County?

Permit processing, weather, material delivery, unforeseen structural issues. We build buffer time, communicate immediately if delays occur on Sonoma County projects.

Do you work year-round in Sonoma County?

Yes, but weather affects outdoor work in Sonoma County. Can’t pour concrete in freezing temps or frame in heavy rain. Interior work continues year-round.

Quality & Process in Sonoma County

How do you ensure quality in Sonoma County?

Project managers inspect at key milestones on all Sonoma County projects. Check work quality, verify code compliance, ensure subcontractor standards. Problems fixed immediately.

What warranties do you provide in Sonoma County?

One-year workmanship warranty on all Sonoma County projects. Material warranties vary by manufacturer—we help register products, maintain documentation.

Are your subcontractors licensed in Sonoma County?

Every subcontractor carries current California licenses and insurance. We verify credentials before anyone works in Sonoma County.

How often will you communicate during my Sonoma County project?

Weekly updates by phone or email. Visit site anytime during work hours. Walkthroughs scheduled for major milestones on Sonoma County projects.

What if I have concerns about my Sonoma County project?

Call or email immediately. Project manager responds within 24 hours on weekdays for all Sonoma County projects.

Why Choose ZSM Construction Co. in Sonoma County

Learn more about ZSM Construction Company and our work throughout Sonoma County.

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Complete project management

Permits, scheduling, inspections across Sonoma County
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Transparent pricing

No hidden fees on Sonoma County projects
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Licensed crews

Every trade verified for Sonoma County work
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Quality materials

Code-compliant suppliers throughout Sonoma County
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Direct communication

Weekly updates on your Sonoma County project
About us

Customer Reviews

See what our clients say about working with us throughout Sonoma County. Visit our reviews page to read more about their experience building with ZSM Construction Co.

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Contact ZSM Construction Co. for Sonoma County Projects

Ready to start your Sonoma County project? Contact ZSM Construction Co. at (707) 849-1961 for a free consultation. We’ll review plans, visit your Sonoma County site, provide detailed estimate.

ZSM Construction Co.
 Skylane Blvd
Santa Rosa, CA 95403
Phone: (707) 849-1961

(707) 849-1961Schedule Your Consultation

Service Areas in Sonoma County

Relocating to Sonoma County? We help clients moving from out of state plan projects before arrival.

Visit our service areas page for complete coverage information across Sonoma and Marin County.

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