Gravel in Forest Knolls, CA

Costs vary by material, distance, and supplier, but expect roughly $40 to $90 per ton (about $30 to $70 per cubic yard) for common crushed gravels in Marin County. Hello Gravel has a minimum order of 3 tons and offers free delivery in many areas, though delivery fees or fuel surcharges may apply for remote or steep drop-off locations; contact us for an exact quote.

For steep, coastal slopes choose angular, crushed rock (such as 3/4u0022 crushed stone or 3/8u0022 crushed gravel) because the edges lock together and resist movement. Decomposed granite (DG) with a stabilizer can work well for paths and patios, while pea gravel and river rock are more likely to roll or wash downhill and are less ideal for driveways on steep grades.

Using 4u0022 compacted depth as a common driveway target, a single car driveway (about 10' x 40' = 400 sq ft) needs roughly 5 cubic yards, which is about 6.5 to 7 tons. A double car driveway (20' x 40' = 800 sq ft) at 4u0022 needs about 10 cubic yards, or roughly 13 to 14 tons; increase quantities by 50% for a 6u0022 depth or if you need extra to account for settling and washout.

Yes — local Marin County quarries and landscape suppliers commonly deliver into Forest Knolls, but their minimums vary. Hello Gravel will connect you with trusted local suppliers and most residential deliveries start at our 3-ton minimum, though some quarries or direct-haul services may require 5 to 10 tons and charge extra for steep or difficult access.

The dry summers mean dust and washout are concerns; choose a denser, angular material and consider a finer top dressing or stabilizer to reduce dust. For wildfire defensible space, use noncombustible mineral materials (crushed rock, DG) within required setbacks and check Marin County and local fire department guidance before major changes.

Because labor and access in Marin County are relatively costly, expect full installation (site prep, base, material, compaction) to run about $2.50 to $7.50 per sq ft depending on slope, access, and whether a geotextile or retaining work is needed. A small single-car driveway (about 400 sq ft) typically costs $1,000 to $3,000 installed, while steeper or heavily prepared jobs will be at the higher end.

Minor residential driveways often do not require a permit, but changes that alter drainage, increase impervious coverage, or impact roadside access likely need review or permits from Marin County. Always check with Marin County Planning and the local fire district, especially for properties in high fire-risk zones or near creeks and protected areas.

Permeable gravel can help infiltration and reduce sheet runoff on gentle slopes, but on steep slopes or clay subgrades it is often insufficient alone. Use a coarse drainage sub-base, geotextile to separate materials, and grade controls (berms, terraces, or french drains) when slopes exceed about 8% to 10% or where erosion is active.

Plan on seasonal maintenance: regrading and raking after winter storms, topping up lost material every 1 to 3 years depending on traffic, and periodic weed control. Typical homeowners add small replenishment loads (1 to 3 tons) every couple of years; steep sites will need more frequent attention and occasional edge repairs after heavy rain.

Gravel is the most affordable up front and allows good drainage, but it requires periodic upkeep and can erode on steep terrain. Asphalt and pavers are more durable and lower maintenance but cost substantially more and reduce permeability; on hilly sites a properly constructed gravel driveway with geotextile, sub-base, and good drainage is often the best balance of cost and performance.

Use Hello Gravel's online calculator to estimate yards or tons, then enter your zip code to see local supplier options and availability. For an exact price, request a quote through our site or contact our team with project dimensions and drop-off details; we will confirm material type, delivery window (standard 2+ business days), and any access or spreading notes before processing the order.