Excavation
Contractor
Sonoma County
Licensed, CSLB-insured excavation serving Santa Rosa, Windsor, Healdsburg, Petaluma, and across Sonoma County. Over a decade of local experience — precise, affordable, and accountable from first dig to final handoff.
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Call us directly for a free project consultation. We serve Sonoma County, Monterey County, and the California Central Coast.
(707) 601-9091CA LIC #1060838 · Licensed & Insured
DW Excavation, LLC is a licensed California excavation contractor serving Sonoma County since 2013 — delivering expert site preparation, grading, trenching, foundation work, and comprehensive excavation services with transparent pricing and owner-led accountability on every project.
Sonoma County's Licensed Excavation Team
When searching for a trusted excavation contractor in Sonoma County, homeowners and developers need more than just equipment — they need a team with the expertise, licensing, and reliability to get the job done right. At DW Excavation, LLC, we bring over a decade of hands-on experience, combining affordable service, high-quality workmanship, and a genuine commitment to every project we take on.
What truly sets us apart is our ability to deliver comprehensive excavation solutions tailored to your site's unique needs. From site planning and trenching to grading, pond excavation, road construction, underground utility installation, and eco remediation — we offer a complete range of services supporting both residential and commercial projects across Sonoma and Monterey Counties.
Our Excavation Services in Sonoma County
DW Excavation delivers a full range of excavation services tailored to both residential and commercial jobs, ensuring clean, efficient site preparation with precision and professionalism.
- Land Clearing & Preparation — We clear brush, trees, and debris; strip organics; and balance or export spoils to create a stable, build-ready surface. Protection of retained assets and sediment controls keeps the work area tidy and compliant from the first cut.
- Trenching for Utilities — Our team installs trenches for water, sewer, electrical, and communications with precise depths, bedding, and backfill, keeping separations and cover in line with typical codes. Safe ingress/egress, spoil placement, and traffic control minimize disruption and risk.
- Foundation Excavation — We cut, over-excavate when needed, and fine-grade building pads for structural reliability — managing export/import to hit target elevations. Clean edges, correct setbacks, and drainage awareness prepare your foundation crew for a faster, cleaner pour.
- Grading Services — From rough cut to finish grade, we shape sites to design elevations for pads, roads, and landscape, prioritizing positive drainage and erosion control. Our grading supports stability, stormwater intent, and inspection readiness throughout construction.
- Pond Installation — We excavate, contour, and compact ponds for irrigation, habitat, or aesthetics, evaluating soils, water table, and inflow/outflow to promote stability. Liners, berm shaping, and spillway considerations are planned up front to reduce seepage and erosion.
Benefits of Hiring DW Excavation
DW Excavation not only prepares your site but also provides tangible advantages that make the project smoother, safer, and smarter.
- Licensed & Insured — Full peace of mind knowing our work meets California state standards under a valid CSLB license (CA LIC #1060838).
- Experienced Local Team — Over a decade of practical, on-the-ground experience in Sonoma and Monterey Counties.
- Affordable, Transparent Pricing — Clear, itemized quotes designed to optimize your budget without compromising quality or timeline.
- Comprehensive Solutions — One contractor handles planning, grading, utilities, pond installation, remediation, and more — fewer handoffs, fewer delays.
- Environmentally Aware — We prioritize eco-friendly practices including erosion control and eco remediation to protect your land and local ecosystems.
Our 4-Step Process
- Consultation & Due Diligence — We walk the site, review goals, soils, access, and utilities; identify permitting needs; and provide a clear scope, sequence, and estimate so you can decide with confidence.
- Buildable Plan, Sequencing & Controls — We translate design into a field-ready plan: haul routes, staging, erosion controls, safety, and inspection checkpoints — sequenced to keep crews productive and your project moving.
- Precision Field Execution — Operators and labor work to spec with verified elevations, safe trench practices, and clean housekeeping. We coordinate with other trades to reduce conflicts and idle time.
- Closeout, As-Builts & Handover — We finalize grades, stabilize disturbed areas, document utilities and elevations, and hand over as-builts so subsequent trades can mobilize faster and inspectors can sign off smoothly.
Built for Sonoma County Conditions
Sonoma County's rolling clay soils, wildfire-impacted hillsides, and tight permitting environment require a contractor who knows the territory. DW Excavation is based in Windsor — this is our home turf, and we've been working these soils since 2013.
We understand Sonoma County's regulatory landscape: grading permits are required for cuts or fills over 50 cubic yards or greater than 3 feet depth, SWPPP stormwater controls are mandatory on most disturbed sites, and Sonoma County's new digital C&D tracking requirements apply to construction waste diversion. We handle all of it.
Sonoma County Site Considerations
- Heavy clay soils requiring moisture-conditioning and proper compaction protocols
- Wildfire history creating defensible space and erosion control requirements on hillside lots
- Grading permit thresholds: 50 cu yd or 3' depth triggers Sonoma County permit requirements
- Sonoma County rainwater cistern rebates available (up to $5,000) for qualifying drainage projects
- Atmospheric river weather events — proper drainage design protects your investment long-term
- Stormwater SWPPP and BMP requirements on all significant earthwork projects
Sonoma County Service Areas
DW Excavation operates across all of Sonoma County with established equipment routes, material suppliers, and inspection workflows — keeping your project moving efficiently.
Santa Rosa
Sonoma County's largest city — foundation excavation, utility trenching, subdivision grading, and residential site prep throughout the metro area.
Get a Quote ›Windsor & Healdsburg
DW Excavation's home base. New construction, agricultural parcels, vineyard site prep, and residential development throughout northern Sonoma County.
Get a Quote ›Petaluma & Rohnert Park
Southern Sonoma County residential and commercial projects — grading, trenching, foundation prep, and land clearing for builders and homeowners.
Get a Quote ›Sebastopol & Rural West County
Agricultural properties, hillside sites, and rural parcels requiring erosion control, pond installation, and access road construction.
Get a Quote ›Excavation Work Across Sonoma County
What Sonoma County Clients Say
"Dallas and his crew were professional from start to finish. They showed up on time, communicated clearly throughout the project, and the finished grading was exactly what we needed. No surprises — just solid work."
"I had a complicated foundation excavation on a sloped lot and DW handled it perfectly. They coordinated the soils report, managed the utility locates, and kept us on schedule. Highly recommend for anyone in the region."
"Great experience with DW Excavation. They were the only contractor who actually walked the site before giving us a bid. The work was done right and the cleanup was thorough. Will use again without question."
Common Questions
Answers to the most frequent questions we hear from homeowners, builders, and developers working in Sonoma County.
Ask Us Directly ›Are you a licensed excavation contractor, and can I verify it? +
Yes. DW Excavation, LLC operates under a valid California contractor license (CA LIC #1060838). You can verify any contractor's license status directly through the CSLB at cslb.ca.gov for added peace of mind before hiring.
Do I need a grading permit for my project in Sonoma County? +
Often, yes. Sonoma County requires a grading permit for cuts or fills exceeding 50 cubic yards or greater than 3 feet in depth, or when work supports structural elements. County guidance outlines the thresholds and exemptions, and DW Excavation can help you navigate the submittal process to avoid delays.
How do you handle trench safety on site? +
We follow OSHA trenching and excavation standards on every job — safe access and egress, protective systems in deeper trenches, and daily inspections by a competent person. This reduces risk, protects our crew and your property, and ensures the work passes inspection without issue.
Will you manage erosion control and stormwater best practices? +
Yes. Silt fencing, slope protection, stabilized entrances, and seasonal stormwater measures are planned to meet Sonoma County BMP expectations and protect neighboring properties. We prepare and implement SWPPP documentation as required by the project scope and county standards.
What factors most affect excavation cost and schedule in Sonoma County? +
Access constraints, soil type (Sonoma's heavy clay soils often require moisture-conditioning), rock presence, seasonal weather windows, and permitting/inspection cadence are the biggest drivers. Our preconstruction site review identifies each of these early so we can build realistic budgets and schedules before any equipment mobilizes.
Does DW Excavation handle projects outside of Santa Rosa? +
Absolutely. We serve all of Sonoma County from our Windsor base, including Healdsburg, Petaluma, Rohnert Park, Sebastopol, Cloverdale, Guerneville, and rural West County. We also regularly work in Monterey County and across the California Central Coast.
Excavation Done Right in Sonoma County
Windsor-based and locally owned since 2013. Licensed, insured, and owner-operated — let's talk about your project.
Serving All of Sonoma County
Sources & References
- CA Contractors State License Board (CSLB) — License Verification, cslb.ca.gov
- Sonoma County Permit Sonoma — Grading Permit Requirements (50 cu yd / 3' depth threshold)
- Sonoma Resource Conservation District — Rainwater Harvesting Rebate Program (up to $5,000)
- Sonoma County — Green Halo C&D Waste Tracking Program (2024)
- OSHA CFR 1926 Subpart P — Excavations and Trenching Safety Standards
- State Water Resources Control Board — SWPPP Requirements for Construction Activities