Decomposed granite installation typically costs $4-$12 per square foot, with a 500-square-foot project averaging about $3,500. Final price depends on excavation, base depth, drainage, local labor, and whether the granite is loose or stabilized.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed DG area | $4 per sq ft | $7 per sq ft | $12 per sq ft | Typical prepared installation |
| 500-square-foot project | $2,000 | $3,500 | $6,000 | Before unusual access or drainage work |
| Loose granite material | $30 per cu yd | $50 per cu yd | $80 per cu yd | Material only; delivery may be extra |
| Stabilized DG installation | $6 per sq ft | $9 per sq ft | $15 per sq ft | Binder and added installation work |
Installed Decomposed Granite Prices for a 500-Square-Foot Area
For a standard path or patio, contractors commonly quote $4-$12 per square foot installed. That puts a 500-square-foot area at roughly $2,000-$6,000, with an average around $3,500. Quotes generally assume accessible ground, ordinary excavation, a compacted base, and a modest granite layer.
Most straightforward projects land near $6-$8 per square foot when the site needs limited grading. A small job may exceed that rate because mobilization and equipment costs are spread over fewer square feet. Assumptions: typical U.S. labor rates, standard DG, normal access, and no major drainage correction.
How Base Preparation and Crew Labor Shape the Quote
Base preparation and labor often make up a substantial share of the installed price. Excavation, grading, and compaction can cost $1-$4 per square foot, while spreading and finishing DG may add $1-$3 per square foot. Material and delivery commonly contribute another $1-$3 per square foot, depending on depth and distance from the supplier.
| Quote component | Low | Average | High |
|---|---|---|---|
| DG material and delivery | $1 per sq ft | $2 per sq ft | $3 per sq ft |
| Excavation and base work | $1 per sq ft | $2 per sq ft | $4 per sq ft |
| Placement and compaction labor | $1 per sq ft | $2 per sq ft | $3 per sq ft |
| Equipment and disposal | $100 total | $400 total | $1,000 total |
Labor may be billed as part of a project rate or estimated at $50-$100 per worker-hour. Confirm whether the quote includes haul-away, edging, compaction, and delivery rather than comparing only the DG line item. A quote that separates base work, material, labor, and disposal is easier to compare.
How Depth, Stabilizer, and Drainage Change the Price
Layer depth affects both material volume and labor. A 2-inch DG surface over a sound base is less expensive than a 3- to 4-inch layer, which can require more excavation and material. For a 500-square-foot area, each additional inch of compacted depth requires about 1.5 cubic yards before allowing for compaction and waste.
Stabilizer can add roughly $1-$4 per square foot compared with loose DG, depending on binder type and application. Drainage slopes, soft soil, or water collecting near a house may add $500-$2,500 for grading, a drain, or more base material. Depth changes above 2 inches and drainage corrections are common reasons an estimate rises beyond the basic per-square-foot range.
Should a Path Use Loose or Stabilized Granite?
Loose DG is usually the lower-cost choice for garden paths and lightly used areas, at about $4-$9 per square foot installed. It is easier to refresh but may migrate, develop ruts, or track indoors. Stabilized DG often costs $6-$15 per square foot and holds together better under foot traffic, though it still needs a well-prepared base.
For a driveway or frequent vehicle traffic, DG may require a deeper engineered base and careful drainage; installed costs can exceed $10-$18 per square foot. It is not equivalent to asphalt or concrete in durability under repeated heavy loads. Match the surface to the expected traffic before paying for a binder or thicker layer.
How Long Does a 500-Square-Foot Installation Take?
A two- or three-person crew can often complete a simple 500-square-foot installation in one to two days. A typical sequence includes excavation, base placement, compaction, DG spreading, and final grading. Difficult access, hand excavation, extensive edging, or a drainage system can extend the work to three or more days.
Contractor labor rates commonly fall around $50-$100 per worker-hour, but crew size and equipment affect the total more than the hourly figure alone. Ask whether the schedule includes delivery and compaction passes. For budgeting, allow $500-$1,500 in labor on a straightforward mid-size job, with higher charges for intensive site preparation.
Why Do Decomposed Granite Prices Differ by Region?
Local quarry supply and labor rates create meaningful price differences. In areas near DG pits, material and delivery may run 10%-20% below a market that relies on longer hauling. Major metro areas can price 15%-30% above nearby rural markets because of higher labor, disposal, and equipment costs; remote sites may also pay more for delivery.
Climate and soil affect the scope as well. Steep slopes, heavy rain, or expansive clay can require more grading and drainage than a flat, dry site. Compare quotes from contractors serving the same area and verify delivery distance, base depth, and disposal charges.
Which Prep Tasks Can Lower a DG Installation Quote?
Keep the footprint and specified depth consistent when requesting bids. Clearing loose plants or movable items may reduce crew time, but avoid removing soil or setting grades without confirming the contractor’s plan. A prepared site is useful only if it preserves the drainage slope and required base depth.
Ask whether usable excavated soil can remain on the property instead of paying for haul-away, and compare loose versus stabilized DG for the actual traffic level. Get at least three itemized quotes that state square footage, depth, material, compaction, edging, and disposal. Controlling scope and comparing the same installation specifications are safer savings measures than cutting base preparation.