How to Install a Gravel Driveway: Complete Step-by-Step Guide

A properly installed gravel driveway is durable, well-draining, and costs significantly less than asphalt or concrete. In the Pacific Northwest, it also handles freeze-thaw cycles and heavy rain far better than many hard surfaces. Here's how to do it right.

Is a Gravel Driveway Right for Your Property?

Advantages

• Cost: Typically 50-75% less than asphalt, 70-85% less than concrete per linear foot
• Drainage: Permeable — rainwater drains through rather than running off. Excellent for Kitsap County clay lots.
• DIY-friendly: No special equipment required beyond a tamper or plate compactor (both rentable)
• Repairs: Easy to top-dress and maintain. Potholes just need more gravel.
• Environmental: Permeable surface reduces stormwater runoff

Disadvantages

• Requires periodic top-dressing (every 3-5 years)
• Gravel scatters onto lawn edges over time
• Can be difficult for wheelchair or bicycle use
• Not permitted in some HOAs or urban lots

Materials You'll Need

The Three-Layer Approach (Professional Standard)

A quality gravel driveway has three layers of progressively finer material:

• Layer 1 — Base Course (4-6" deep): 4" clean crushed rock or large crushed aggregate. Provides structural support. Goes directly on subgrade.
• Layer 2 — Sub-base (2-3" deep): 3/4" minus crushed rock. Fills voids in base layer, begins to compact together.
• Layer 3 — Surface Course (2" deep): 3/4" minus or crusher run. Compact surface that sheds water and provides clean appearance.

Minimum total depth for vehicle traffic: 6-8 inches compacted. For heavy vehicles (RVs, equipment), use 8-12 inches.

Quantities: How Much Gravel Do You Need?

Formula for each layer: Length (ft) × Width (ft) × Depth (inches) ÷ 324 = Cubic Yards

Then add 10-15% for compaction.

Driveway Gravel Calculator

Step-by-Step Installation

Step 1: Mark and Excavate

• Stake out the driveway width (typically 10-12 feet for single lane, 16-20 feet for two lanes)
• Remove existing vegetation, sod, and topsoil to a depth of 8-12 inches
• The subgrade (bottom of excavation) should slope slightly to one side for drainage — 1-2% cross-slope
• Remove any soft or organic material; replace with compacted fill if needed

Step 2: Compact the Subgrade

• Rent a plate compactor and make 2-3 passes over the subgrade
• Any soft spots need to be addressed now — they'll cause settling later
• In western Washington, subgrade is often clay — ensure it's not saturated before compacting

Step 3: Install Geotextile Fabric (Optional but Recommended)

• Lay non-woven geotextile fabric over the subgrade before adding gravel
• Prevents gravel from mixing into soft subgrade over time — significantly extends driveway life
• Overlap seams by 12-18 inches; pin every few feet

Step 4: Install Edging

• Set landscape edging or timber edging along both sides of the driveway
• This keeps gravel from spreading into lawn over time
• Metal landscape edging is the cleanest option; timber or concrete block for heavier-duty borders

Step 5: Lay the Base Layer

• Order 4" clean crushed rock and spread to 4-inch depth
• Use a rake to level; doesn't need to be perfect at this stage
• Make 2-3 passes with plate compactor

Step 6: Add the Sub-base Layer

• Spread 3/4" minus to 3-inch depth over compacted base
• Compact again — 2 passes minimum
• Check for low spots; add material and recompact

Step 7: Surface Layer

• Spread 3/4" minus or crusher run to 2-inch depth
• Rake smooth — attention to cross-slope for drainage
• Compact thoroughly — this is the final surface

Step 8: Top Dress After First Winter

• After the first winter, check for low spots, rutting, or thinning edges
• A top-dress of 3/4" minus in spring is normal for a new driveway
• Plan to top-dress every 3-5 years thereafter

Pacific Northwest Gravel Driveway Tips

Drainage First

Before installing, address drainage around the driveway. If water drains onto the driveway from slopes, it will wash material away over time. A simple swale or culvert on the uphill side prevents this.

Best Season to Install

Late spring through early fall. Avoid installing in saturated soil conditions — compaction on wet clay subgrade is ineffective and you risk creating a soft base that settles unevenly.

Frequently Asked Questions

How long does a gravel driveway last?

A properly installed gravel driveway with a good base layer lasts indefinitely with maintenance. Plan on top-dressing the surface every 3-5 years. The base layers don't need replacement — just the surface course.

What is the best gravel for a driveway in the Pacific Northwest?

3/4" minus crushed rock (also called road base or crusher run) is the standard choice for the surface layer. It compacts well, drains quickly, and handles our freeze-thaw cycles. For the base, use clean crushed rock.

How much does a gravel driveway cost?

Material cost for a 12×60 ft driveway runs approximately $400-$800 for gravel (depending on depth), plus delivery. DIY installation keeps labor costs near zero. Compare this to $3,000-$6,000 for asphalt or $8,000-$15,000 for concrete on the same footprint.

Ready to build your driveway? Harbor Soils delivers crushed rock, road base, and driveway gravel throughout Gig Harbor, Port Orchard, and Kitsap County. We can help you calculate quantities. Order gravel → | See our driveway materials guide →