About ZSM Construction Co.

(707) 849-1961Schedule Your Consultation
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About the Owner

Zack Murphy founded ZSM Construction Co. with a commitment to delivering top-quality work at affordable prices in Sonoma County. As Principal of ZSM Construction, Zack brings hands-on expertise across residential and commercial projects, from custom home builds to complete remodels and tenant improvements.

Zack built ZSM Construction on the principle that quality craftsmanship shouldn’t come with premium pricing. His approach combines technical expertise with straightforward communication—clients know what to expect, when to expect it, and what it’ll cost.

Operating from Santa Rosa, Zack oversees every project personally, ensuring ZSM’s standards are met from initial consultation through final walkthrough. His focus on Sonoma County means he understands local building requirements, works with trusted local subcontractors, and knows what construction challenges wine country properties present.

Our Vision

ZSM Construction envisions becoming Sonoma County’s most trusted contstruction company— the general contractor homeowners and businesses call first for honest assessments, quality work, and projects completed right the first time.

We’re building a reputation where “quality meets craftsmanship” isn’t just our tagline—it’s what clients experience on every job site. Our vision includes expanding our capabilities while maintaining the personal attention and craftsmanship standards that define our work today.

Our Mission

Our mission is simple: Deliver top-quality construction work at affordable prices throughout Sonoma County.

We accomplish this by:

  • Managing projects efficiently from permits through final inspection
  • Maintaining transparent pricing with clear estimates and no hidden costs
  • Using quality materials that provide long-term value
  • Employing skilled tradespeople who take pride in their craftsmanship
  • Communicating clearly so clients understand progress, timelines, and any project changes
  • Standing behind our work with solid warranties and responsive follow-up

Whether building a custom home, remodeling a kitchen, constructing an ADU, or completing a commercial tenant improvement, we handle every project with the same commitment to quality and fair pricing.

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Why Choose ZSM Construction Co.

Looking for a construction company in Sonoma County who delivers quality work without the premium pricing? Here’s what sets ZSM Construction apart:

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Comprehensive Construction Services

We handle everything—new construction, complete remodels, additions, ADUs, decks, concrete work, and commercial tenant improvements. One contractor for all your construction needs means consistent quality and simplified project management.
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Top Quality Work at Affordable Prices

Quality construction doesn’t require luxury pricing. We provide transparent estimates, source materials efficiently, and manage projects to stay on budget without cutting corners on craftsmanship.
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Sonoma County Expertise

Based in Santa Rosa and serving Sonoma County exclusively, we understand local building codes, work with reliable local subcontractors, and know the construction challenges specific to wine country properties.
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Hands-On Project Management

Principal Zack Murphy stays involved throughout your project, ensuring ZSM’s quality standards are maintained from demolition through final inspection. You get direct access to the owner, not layers of project managers.
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Skilled Craftsmanship

We employ experienced tradespeople who take pride in their work. Whether framing a custom home or installing custom cabinetry, craftsmanship quality matters on every aspect of your project.

Customer Reviews

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

Frequently Asked Questions

Project Process & Timeline

How long does a typical project take?

Project timelines vary significantly by scope. Custom home builds typically take 8-14 months, full kitchen remodels require 6-10 weeks, bathroom renovations need 4-6 weeks, and ADU construction runs 6-9 months. We provide detailed schedules during your consultation and keep you updated throughout construction.

What's included in your project management?

We handle everything—permit applications, inspection scheduling, subcontractor coordination, material ordering, daily site supervision, and quality control. You get one point of contact managing all aspects of your project from start to completion.

Do you work on weekends or evenings?

Standard work hours are Monday through Friday, 7:00 AM to 5:00 PM. We can arrange weekend or extended hours for specific situations, though this may affect project costs. Emergency repairs are addressed as quickly as possible regardless of schedule.

How do you handle project changes?

Changes happen—we get it. When you want to modify plans mid-project, we assess the impact on timeline and budget, provide a written change order with updated costs, and get your approval before proceeding. Clear documentation protects both parties.

What happens if we encounter unexpected issues?

Construction surprises happen, especially in remodels—hidden water damage, outdated electrical systems, or structural issues. We stop work on affected areas, document the problem with photos, explain options and costs, and get your approval before addressing the issue.

Service Areas & Scheduling

Where do you provide services?

We serve Sonoma County and Marin County from our Santa Rosa base. This includes Santa Rosa, Healdsburg, Windsor, Sebastopol, Petaluma, Rohnert Park, Cotati, and surrounding communities. Contact us to confirm service to your specific location.

How far in advance should I schedule?

Scheduling depends on project size and current workload. Small projects may start within 2-4 weeks, while major remodels and custom homes typically require 1-3 months lead time. Contact us early to discuss your timeline and secure your preferred start date.

Can you work around our schedule?

We coordinate schedules to minimize disruption—planning noisy work during your work hours, scheduling messy demolition before vacations, or timing completion before specific events. Clear communication about your needs helps us plan effectively.

Do you work during holidays?

We’re closed for major holidays—Thanksgiving, Christmas, New Year’s. Projects underway may pause for a few days around holidays. We discuss holiday schedules during project planning so you know what to expect.

Pricing & Estimates

How much does a typical project cost?

Project costs vary widely based on scope, materials, and complexity. Kitchen remodels range from $25,000 to $80,000+, bathroom renovations run $15,000 to $40,000+, and custom homes start around $300-500 per square foot. We provide detailed estimates during your free consultation.

What's included in your estimates?

Our estimates include all labor, materials, permits, subcontractor fees, project management, cleanup, and our standard warranty. We itemize costs so you understand exactly what you’re paying for—no hidden fees or surprise charges.

Do you require a deposit?

Yes, we typically require a deposit to secure your project schedule and order initial materials. Deposit amounts vary by project size but are generally 10-30% of the total project cost. Remaining payments follow a schedule tied to project milestones.

Can we make payments in installments?

Absolutely. We structure payment schedules around project phases—deposit at contract signing, payments at major milestones (framing complete, drywall, final inspection), and final payment upon project completion. This protects both you and us throughout the project.

What if the project goes over budget?

Our detailed estimates and careful project management minimize budget overruns. If unexpected conditions require additional work, we provide written change orders with costs before proceeding. We never do extra work without your approval.

Warranties & Quality

What warranty do you provide?

We provide a one-year workmanship warranty covering installation quality and construction defects. Many materials and systems (roofing, appliances, HVAC) carry manufacturer warranties we help you register and maintain. We return promptly to address any warranty issues.

What if something breaks after completion?

Contact us immediately if you discover problems after project completion. Workmanship issues within the warranty period are repaired at no charge. For items outside warranty coverage, we provide service calls at our standard hourly rates.

How do you ensure quality work?

Principal Zack Murphy oversees every project personally, conducting regular site inspections and quality checks. We employ experienced, skilled tradespeople, follow building codes rigorously, and address issues immediately rather than covering them up. Our reputation depends on quality work.

Can we request specific materials or brands?

Absolutely. We’re happy to work with your preferred materials, fixtures, and finishes. We provide recommendations based on our experience with durability and value, but ultimately you choose what goes into your project. We’ll source whatever materials you select.
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Contact ZSM Construction Co.

Ready to talk about your construction project? Contact ZSM Construction Co. today to schedule your free consultation and get answers to your questions about building or remodeling in Sonoma County.

ZSM Construction Co.

Santa Rosa, CA 95403

(707) 849-1961

zsmco@icloud.com

Call us today to discuss your project—we’ll schedule a site visit, review your plans, and provide a realistic estimate for bringing your construction vision to life.