Concrete for a Standard Sidewalk
Free calculator with pre-filled dimensions • Updated March 2026
A 30-foot sidewalk (4 ft wide, 4 inches deep) needs 1.48 cubic yards — about 67 bags of 80-lb mix.
Open calculator with these dimensions →Concrete Sidewalk: Material & Installation Guide
Standard residential sidewalks are 4 feet wide and 4 inches thick, meeting most local building codes and ADA requirements. A 30-foot sidewalk connecting a driveway to the front door is one of the most common residential concrete projects.
Material Breakdown
| Material | Quantity | Cost (2026) |
|---|---|---|
| Concrete | 1.63 yd³ (with 10% extra) | $245–$275 (truck) or $400–$510 (bags) |
| Gravel base | 1.5 yd³ | $30–$53 |
| 2×4 form lumber | 8 boards (8-foot) | $28–$48 |
| Wire mesh | 3 sheets (3.5×10) | $24–$45 |
Sidewalk Design Standards
- Width: 4 feet is standard residential. ADA requires 5 feet for public sidewalks. Check your local code.
- Thickness: 4 inches is standard. Use 6 inches where vehicles may cross the sidewalk (driveway aprons).
- Control joints: Every 4–5 feet (equal to the width). A 30-foot walk gets 6–7 joints.
- Cross-slope: 1/4 inch per foot (2%) toward the lawn side for drainage. Must not exceed 2% per ADA guidelines.
Pro Tips
- Pour in sections. A 30-foot sidewalk is easier to manage if you pour in 10-foot sections with expansion joints between. This gives you more working time for finishing.
- Broom perpendicular to foot traffic. This provides maximum slip resistance in wet conditions. Always broom sidewalks for safety — smooth finishes are dangerous when wet.
- Set forms to grade stakes. Sidewalks should follow the lawn's grade smoothly. Use a string line between stakes to ensure consistent height and cross-slope.
Frequently Asked Questions
How much concrete for a 30-foot sidewalk?
A standard 4-foot-wide, 4-inch-thick sidewalk that is 30 feet long needs 1.48 cubic yards of concrete. Order 1.63 yards to account for waste. That is about 67 bags of 80-lb mix.
How much does a concrete sidewalk cost per linear foot?
In 2026, DIY materials cost approximately $8–$12 per linear foot for a 4-foot-wide walk. Professional installation runs $15–$25 per linear foot including demolition of old walkway.
How wide should a residential sidewalk be?
Standard residential sidewalks are 4 feet wide. If your sidewalk is a public walkway, ADA requires a minimum of 5 feet to allow wheelchair passage. Some municipalities require 5 feet for front sidewalks.