Whether you’re building a new garage, paving your driveway, or adding a garden shed to your property, it’s difficult to guess how much you’ll spend on concrete. All of these projects require a sturdy, concrete foundation, and material prices fluctuate all the time. The best way to understand the cost of your unique project is to request several estimates from different concrete construction companies. However, if you’re trying to budget for a larger project, you’ll want to keep these cost factors in mind:
Size
The larger the project, the higher the cost typically is, because more materials and labor are required. However, some small slab projects may have a higher cost per square foot due to mobilization costs (the cost to deliver the concrete and set up the forms). Generally, though, larger concrete slabs require more expansion joints and longer pour times.
Requirements
Industrial or commercial jobs are likely to be higher because project requirements are more stringent for safety purposes. Local building codes may also mandate specific reinforcement or minimum thickness requirements, which can increase the project’s cost. Additionally, many areas in Michigan have expansive clay soil, requiring deeper excavation and thicker gravel bases, which in turn result in higher expenses.
Thickness
Thickness affects the volume of concrete needed to pour a slab. A standard 4-inch residential slab uses 1.23 cubic yards per 100 square feet, while a 6-inch slab uses 1.85 cubic yards per 100 square feet. If you’re taking on a garage, a high-traffic driveway, or another larger commercial project, you’ll need a thicker slab to handle heavier loads.
Design
Some unusual designs require more work to pour and form. Standard slabs on their own aren’t that complex, but when you add curved edges, irregular shapes, steps, or even decorative finishes like stamped patterns or exposed aggregate, the cost can increase because more labor is required. With decorative concrete, costs can increase if the pattern and color scheme are complex.
Why It’s Complicated to Make a Guess
It’s impossible to provide an accurate cost estimate without knowing the specific details of the project. All of these factors interact and influence the cost. If you’re planning a larger, decorative patio with curves, it may cost more than a garage floor. It just depends on the overall complexity and details of the project.
Rough Estimates
It can be helpful for property owners to have a base estimate to work off of. While we still recommend requesting quotes from multiple contractors, you can use these ranges to budget for potential projects:
- Per square foot: $6.50 to $10.50
- Per cubic yard: $160 to $195
Examples:
- A concrete driveway that’s 20 x 24’ could cost between $3,120 and $5,040
- A 24 x 24 garage may cost between $3,744 and $6,048.
- A shed slab that’s 10 x 12 could cost between $780 and $1,260. Since a garden shed doesn’t need to handle the same weight as a garage, you can use a 4-inch slab.
- A 12 x 12 patio may cost anywhere between $936 and $1,512.
Let Us Know About Your Project
G&G Concrete and Construction proudly serves homeowners and businesses throughout Macomb, Oakland, and Wayne counties in Michigan. We specialize in driveway, patio, walkway, flooring, parking lot, curbs, road, decorative concrete, and commercial slab projects.
If you have a project in mind, send us the details, and we’ll provide an accurate cost estimate within 24 hours.
