Can you extend or widen an existing concrete driveway?
Yes. A concrete driveway can be widened along its side or extended with a parking pad, turnaround or longer run. The new section is poured on its own compacted base and tied to the old slab with steel dowels or an isolation joint so the two move together without cracking each other. The new concrete will look newer at first, and the difference fades as it weathers.
Written by Morgan's Concrete and Excavation. Published 2026-10-18.
How is new concrete joined to an old driveway?
The edge of the old slab is cleaned up, and the new section is formed on a base excavated and compacted to the same level. Where the new slab should stay flush with the old one, steel dowels are drilled into the edge of the existing slab to tie the two together. Where they should move independently, an isolation joint separates them.
Getting the base right under the new section is what keeps the seam from cracking or one side from settling lower than the other over time.
Will the new section match the old concrete?
A brand new slab is lighter than concrete that has weathered for years, so a widened section will stand out at first. The color evens out as the new concrete ages. Matching the finish, such as broom direction or an exposed aggregate look, narrows the difference from day one.
Some owners use the extension as a design feature: a contrasting border, a stamped band along the edge or a colored parking pad makes the new section look intentional.
What are the most common driveway extensions?
Widening a single car drive to fit two vehicles side by side is the most common. Others are a parking pad beside the garage for a truck, boat or camper, a turnaround so cars do not back out onto the road, and a walkway that ties the drive to the front door.
- Widen a single drive to double width
- Parking pad for a truck, trailer, boat or RV
- Turnaround near the house
- Walkway from the drive to the porch
Do I need a permit to widen a driveway?
Requirements depend on where you live. Inside Cookeville, a new curb cut or work in the city right of way goes through the city, and any new or modified driveway connection to a state highway needs a TDOT highway entrance permit. Work entirely on your own property and away from the road is often simpler. Check with your city or county codes office before the pour, and Joe can tell you what he typically sees in your area.
What does an extension cost?
The price follows the added square footage, thickness for what will park there, base and grading work, drilling dowels into the old slab, and access. Widening is often one of the best values in concrete, because the drive and the base are already there and the new section ties into them. Request a free written estimate at /request-estimate.
Related questions
Can you add onto an existing concrete driveway?
Yes. The new section is poured on its own compacted base and tied to the existing slab with steel dowels or separated with an isolation joint.
Will a driveway extension crack where it meets the old concrete?
A properly prepared base and a doweled or isolated joint keep the seam from cracking or settling unevenly.
What sets the cost of widening a driveway?
The price follows the added square footage, thickness, base work and the doweling into the old slab. Joe walks the drive and puts a firm price in writing at no cost.
Planning a concrete driveways project
See how Morgan’s handles concrete driveways jobs around Cookeville, or request a written estimate for your own project.