Concrete Calculator › Cost by city › Denver, CO
Concrete Cost in Denver, CO
Concrete for a 20×20 ft (400 sq ft) 4-inch concrete slab in Denver, CO costs about $800 ($680–$920). Local 2026 price is around $162 per cuyd. Free calculator inside.
What goes into concrete cost in Denver
The line items below are 2026 national averages adjusted by the CO construction-cost factor (×1.08). A written Denver quote is usually built from these pieces — use them to sanity-check any bid line by line before you sign.
| Cost item | Typical Denver price | Unit |
|---|---|---|
| Ready-mix concrete, 3,000–4,000 PSI | $162 – $200 | per cu yd delivered |
| Labor: forming, pouring & finishing | $4.32 – $8.64 | per sq ft |
| Gravel base & subgrade prep | $1.08 – $2.16 | per sq ft |
| Wire mesh / rebar reinforcement | $0.38 – $1.08 | per sq ft |
| Short-load fee (orders under ~4 cu yd) | $81 – $162 | per delivery |
| Residential flatwork permit | $54 – $324 | per project |
Permit fees are set by the city rather than the market — confirm current fees with the local building department.
What’s different about building in Denver
The frost line around Denver is roughly 36 inches, so footings for anything structural (stairs, walls, covered patios) must bear below that depth — confirm the exact figure with Denver Community Planning & Development. A patio or driveway slab itself floats above the frost line, but its thickened edges and base prep are what keep it from heaving.
Outdoor concrete in Denver should be an air-entrained mix (about 5–7% air) so it survives freeze-thaw cycles and de-icing salt. Skipping air entrainment is the most common cause of surface scaling here.
The bigger local issue is soil: expansive bentonite clay in many neighborhoods. Slabs on expansive clay crack when the subgrade wets and dries unevenly, which is why post-tensioned slabs and pre-pour moisture conditioning are standard practice in the Denver market.
Denver combines expansive clay, intense sun, hail, and 60°F daily temperature swings — brutal on flatwork.
Permits: for larger flatwork, driveways, or anything structural, check requirements with Denver Community Planning & Development before work starts.
Estimate your own Denver project
Prices in Denver, CO run about +8% versus the national average. Enter your dimensions — the calculator starts from the local $162 per cuyd rate; change it to your supplier's quote for an exact figure.
Material shopping list
- Order about 4.94 cubic yards of concrete.
- Budget about $800 before delivery, taxes, and labor.
- Add 5–10% waste for uneven subgrade, cuts, settling, or spillage.
Formula & assumptions
Area = length x width. Volume = area x depth / 12. Cubic yards = cubic feet / 27. Cost = quantity x local unit price.
- Default depth: 4 inches
- Default price: $162 per cuyd
- 80-lb bags yield: 0.6 cu ft each
These assumptions make the estimate easy for search engines and AI answer tools to verify. Replace the default price with your supplier quote for a local estimate.
Concrete cost in Denver by project size
Material quantities use the local Denver unit price; the last column adds delivery, base prep, and labor at CO-adjusted rates. Click any size for its full breakdown and calculator.
| Project size | You need | Material cost | Installed estimate |
|---|---|---|---|
| 10×10 ft · 4 in | 1.23 cu yd | $200 | $648 – $1,080 |
| 12×12 ft · 4 in | 1.78 cu yd | $288 | $933 – $1,555 |
| 12×16 ft · 4 in | 2.37 cu yd | $384 | $1,244 – $2,074 |
| 16×20 ft · 4 in | 3.95 cu yd | $640 | $2,074 – $3,456 |
| 20×20 ft · 4 in | 4.94 cu yd | $800 | $2,592 – $4,320 |
| 24×24 ft · 4 in | 7.11 cu yd | $1,152 | $3,732 – $6,221 |
| 30×40 ft · 4 in | 14.81 cu yd | $2,400 | $7,776 – $12,960 |
| 40×50 ft · 4 in | 24.69 cu yd | $4,000 | $12,960 – $21,600 |
Installed ranges assume straightforward access and a buildable subgrade; steep, tight, or poor-soil sites price above the top of the range.
Concrete questions Denver homeowners ask
- How much does a concrete slab cost in Denver?
- Materials alone for a 20×20 ft (400 sq ft) 4-inch concrete slab run about $800 in Denver. Fully installed — gravel base, forms, reinforcement, labor, and finishing — most homeowners pay $2,592 to $4,320 for the same slab, roughly $6.48–$10.8 per square foot.
- What does ready-mix concrete cost per yard in Denver?
- Plan on $162–$200 per cubic yard delivered for a standard 3,000–4,000 PSI mix in the Denver area. Orders under about 4 cubic yards usually add a short-load fee of $81–$162, so small pours cost noticeably more per yard.
- Do I need a permit to pour a concrete slab in Denver?
- Driveways, sidewalks, and anything structural almost always require one; small detached patio pads sometimes fall under the permit threshold. Confirm with Denver Community Planning & Development before you pour — a permit costs far less than being ordered to remove finished work.
- Is it cheaper to pour concrete myself in Denver?
- Labor and finishing account for $4.32–$8.64 per square foot of the installed price, so DIY can roughly halve the cost of a simple pad. But concrete is unforgiving: once the truck arrives you have under two hours to place, screed, and finish. Most first-timers cap DIY at about 100–150 square feet.
- Can you pour concrete in winter in Denver?
- Below about 40°F, fresh concrete needs curing blankets, heated enclosures, or accelerating admixtures to gain strength — all of which add cost. Most residential work in Denver is scheduled between spring and fall, and winter quotes often carry a cold-weather premium.
- How can I save money on concrete in Denver?
- Combine small pours into one delivery to clear the short-load threshold, handle your own excavation and gravel base, and collect at least three written Denver quotes — 30% spreads between local bids are normal.
Concrete cost in nearby cities
Regional estimate = national average adjusted by a CO cost factor. Not a quote. Actual prices vary by site conditions, access, and supplier.