Fill Dirt — Reliable, Compactable Earth Material
Bulk Fill Dirt Delivery Across Marin, Sonoma, Alameda, Contra Costa, San Francisco & San Mateo
 
Fill Dirt is a raw, unprocessed earth material collected directly from excavation and construction jobsites. Unlike topsoil or garden mixes, fill dirt contains little to no organic matter, making it ideal for structural and foundational applications where compaction, stability, and load-bearing performance matter most.
 
At North Bay Materials, our fill dirt is sourced locally and delivered in bulk by small, residential-friendly dump trucks—perfect for projects throughout Marin County, Sonoma County, Alameda County, Contra Costa County, San Francisco, and San Mateo County.
 
This material is not screened or amended and may include a natural blend of clay, sand, and native soil particles. That variability is exactly what makes fill dirt effective for backfilling, leveling, and building up grade where strength—not plant growth—is the priority.
 
Common Uses & Applications for Fill Dirt
Ideal for Structural, Grading & Backfill Projects Across the North Bay & Bay Area
Fill dirt is a utility-focused material designed for strength, stability, and compaction—not aesthetics or planting. Because it contains minimal organic matter, it won’t break down over time, making it a dependable choice for projects that require a solid base.
Typical applications include:
Backfilling foundations & trenches
Perfect for filling around footings, retaining walls, utility lines, and plumbing or electrical trenches where long-term stability is required.
Raising grade & site leveling
Commonly used to build up low areas, correct drainage slopes, or prepare uneven ground before installing base rock, concrete, or pavers.
Under slabs, patios & driveways
Provides a compactable sub-layer beneath concrete slabs, asphalt, walkways, and driveway base materials.
Erosion repair & land restoration
Useful for filling washed-out areas on residential lots, rural properties, vineyards, and construction sites.
General construction & landscape prep
Frequently used by contractors, landscapers, builders, plumbers, and homeowners preparing sites throughout San Rafael, Novato, Mill Valley, Petaluma, Santa Rosa, Walnut Creek, Concord, San Mateo, Daly City, and San Francisco.
Because fill dirt is not screened or blended, it’s a cost-effective solution for projects where appearance doesn’t matter—but performance does.
 
Coverage Rates & Ordering Information
Coverage Per Cubic Yard
~150 sq ft at 2" depth
~75 sq ft at 4" depth
~50 sq ft at 6" depth
~38 sq ft at 8" depth
Tip: Order an additional 5–10% to account for compaction and grade adjustments.
 
Coverage, Ordering & Bulk Delivery
North Bay Materials makes it easy to get bulk fill dirt delivered directly to your home or jobsite—without the hassle of yard pickups or oversized semi-trucks. Our delivery-only model is designed for residential, urban, and tight-access projects throughout the North Bay and greater Bay Area.
Delivery Areas We Serve
We provide reliable fill dirt delivery across:
Marin County – San Rafael, Novato, Mill Valley, Tiburon, Larkspur, Corte Madera
Sonoma County – Petaluma, Santa Rosa, Rohnert Park, Sebastopol
Alameda County – Oakland, Berkeley, Piedmont, San Leandro
Contra Costa County – Walnut Creek, Concord, Orinda, Lafayette
San Francisco – All neighborhoods
San Mateo County – Daly City, San Mateo, Burlingame, Redwood City
If your project site is nearby but not listed, we can typically accommodate—just request a quote.
 
Access & Site Requirements
Suitable dump locations: gravel driveways, soil pads, or other open areas
Tight-access properties should be evaluated prior to delivery
Material is loose and dusty; take precautions to protect nearby landscaping and hardscape
 
⚠ Important Note: This is an unscreened material. It may contain fines, dirt clumps up to ~2", small wood fragments, and occasional bits of metal from demolition sources. While it is compactable and works well for non-engineered fill, it is not suitable for applications requiring precise grading or clean, screened dirt.
 
Get your site project-ready—order Fill Dirt today from North Bay Materials Delivery Services.
 
 
Frequently Asked Questions – Fill Dirt
Q: What exactly is fill dirt?
A: Fill dirt is a compactable, low-organic-content soil composed primarily of natural earth and fine mineral particles. Unlike topsoil, it has minimal organic matter, making it dense, stable, and ideal for grading, leveling, and rough structural base work.
 
Q: How is this fill dirt different from topsoil?
A: Topsoil contains organic matter that can decompose and shift over time, which is not ideal for structural stability. Fill dirt is screened for compacts well, making it better suited for foundations, retaining wall backfill, slope correction, and construction prep.
 
Q: Can I use fill dirt for planting?
A: Fill dirt is not recommended for planting because it lacks nutrients and organic matter. If your project requires planting, we recommend adding a layer of enriched topsoil or compost above the fill dirt.
 
Q: What are the most common uses for fill dirt?
A: Contractors and homeowners in North Bay and around the Bay Area use fill dirt for site grading, backfilling retaining walls, creating stable building pads, correcting slopes, and filling in low areas before landscaping or paving.
 
Q: Does this fill dirt come screened?
A: No, our fill dirt is locally sourced and its un-screened for consistency, oversized rocks and debris are expected instead we use Screened Fill Dirt.
 
Q: Is fill dirt good for drainage projects?
A: Fill dirt can be used for certain drainage grading applications, but if you need materials that allow high water permeability, such as under French drains, consider a more free-draining aggregate like drain rock.
 
Q: What areas do you deliver to?
A: We deliver fill-dirt throughout Marin, Sonoma, Alameda, Contra Costa, San Francisco and San Mateo counties.