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How Much Does Decomposed Granite Cost?

Typical Range: $125 - $300

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Crushed Granite Cost

Installing crushed or decomposed granite on a 400-square foot area costs from $125 to $300, or between $0.30 and $0.70 per square foot. The cost of the materials alone is between $35 and $60 per inch of coverage, assuming you use basic crushed granite. The most important cost variables are the quality of the granite and depth of coverage. Your location and distance from the nearest quarry also affect the cost of crushed and decomposed granite.

On This Page:

  1. Decomposed Granite Cost Calculator
  2. Decomposed Granite Installation Cost
  3. Decomposed Granite Cost Per Cubic Yard
  4. Decomposed Granite Cost Per Ton
  5. Granite Rock Prices
  6. DIY vs. Hire a DG Installation Pro
  7. FAQs

Decomposed Granite Cost Calculator

Cost CategoryTotal Cost
Low$125
Average$215
High$300

Decomposed Granite Installation Cost

The labor cost of installing decomposed granite ranges from $70 to $80 per hour. However, contractors usually quote a price for the entire job, rather than the time required for each task. Contractors are more likely to provide an hourly rate when you’re supplying the granite and other materials yourself. The time that contractors require to complete a project depends on the size and type of the project.

Crushed Granite Driveway Cost

The labor cost of installing crushed granite for a driveway is usually between $120 and $240. This figure assumes a 10 by 50-foot gravel driveway covered to a depth of six inches, which is adequate for supporting the weight of vehicles. It doesn’t include the labor needed to level and grade the driveway, which is typically between $1,500 and $2,000. Clearing the ground of trees costs at least $200 to $500, depending on their size.

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Crushed Granite Patio Cost

The total labor cost of a crushed granite patio is between $400 and $700, assuming a typical 10 by 10-foot patio. The cost of installing the granite itself is less than $50, but contractors will also need to excavate and prepare the site. These tasks require much more labor, as it’s particularly important for a patio to be level.

Decomposed Granite Cost Per Cubic Yard

The cost of decomposed granite is between $30 to $50 per cubic yard for the cheapest types, depending on location and quality. Transportation is by far the greatest cost variable for decomposed granite, due to the density of this material. All suppliers will charge you for moving the granite to the work site in some way, although the specific pricing model varies. Some suppliers will charge a flat rate per mile for transportation, while others will charge a flat fee per cubic yard within a given service range.

Decomposed Granite Cost Per Square Foot

Covering a 20 by 20-foot area to a depth of six inches with decomposed granite costs between $220 and $370, which is less than $1 per square foot. This project would require 200 cubic feet of material, or about 7.4 cubic yards. You may also need to add a stabilizing agent to the gravel if you live in an area with heavy rainfall, which increases the cost of materials.

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Decomposed Granite Cost Per Ton

The cost for a ton of decomposed granite is between $10 and $16, assuming the gravel has an average size of ½ inch. A cubic yard of ½-inch decomposed granite weighs about three tons, although this weight will decrease as the size of the gravel increases. Calculate the cost per ton by dividing the cost per cubic yard by the number of tons in a cubic yard. This figure assumes the gravel isn’t compressed, which occurs when the gravel remains in one place for a prolonged period.

Granite Rock Prices

Granite TypeCost per Ton
Red Crushed Granite, 3/8”$60
Blue Crushed Granite, 3/8”$60
Gray Crushed Granite, 3/8”$60
Red Stabilized Decomposed Granite, 3/8”$185
Blue Stabilized Decomposed Granite, 3/8”$185

Crushed Red Granite Price

A typical cost for crushed red granite is $60 per ton. Granite is available in many colors, so color isn’t a significant cost factor. Cost is more dependent on other factors such as the supplier, location, distance from the quarry and gravel size. Suppliers typically list the price per ton assuming the customer orders a full truckload. They may also sell in lower quantities at the same price per ton when they have a surplus.

Stabilized Decomposed Granite Cost

Stabilized decomposed granite costs about $185 per ton. The price for this type of granite is much higher than that of simple crushed granite because the supplier must add and mix a stabilizing agent with the granite. The granite also requires time to decompose.

DIY vs. Hire a DG Installation Pro

The process of pouring and smoothing gravel doesn’t require much skill once the gravel is on site. The challenging aspect of projects involving gravel is leveling and grading the site, which generally does require a gravel driveway installer near you. Removing mature trees from the site is also a task you should leave to the pros.

FAQs

How deep should decomposed granite be?

The depth of decomposed granite primarily depends on the weight that the surface must support. A driveway must support vehicles, so it should be about six inches deep. A surface that people will walk on regularly will need at least two inches of gravel, while surfaces that are largely decorative can get by with only one inch of gravel.

How long does decomposed granite last?

Decomposed granite with a stabilizer should last seven to ten years before it shifts enough to require replacement. It primarily depends on how tightly packed the granite is and how often your location gets heavy rainfall. The slope of the surface is also an important factor for the length of time the site will retain the granite.

How much does a yard of decomposed granite cover?

A cubic yard of gravel will cover 54 square feet to a depth of six inches. This figure is for the depth at the time of installation, which will decrease over time. Gravel suppliers in your area recommend that you reduce this coverage by at least 15% when estimating the stable depth.

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