How Much Does a 20x20 Concrete Driveway Cost?
A 20x20 concrete driveway — 400 square feet — is one of the most common sizes we pour in Lawrence and Giles County. It's the right fit for a single-car pad, a smaller double-car approach, or a parking slab alongside an existing driveway. If you're getting quotes and trying to figure out if the numbers you're hearing are reasonable, this guide is for you.
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A freshly poured concrete driveway pad — broom finished with control joints, ready for 35+ years of use.
Quick answer: what does a 20x20 concrete driveway cost in Tennessee?
In Middle Tennessee, a 20x20 concrete driveway (400 sq ft) runs $2,800 to $5,200 installed — covering excavation, compacted gravel base, wire mesh, 3,500 PSI concrete, broom finish, and joint cutting. Your number moves based on site conditions, existing driveway demo, thickness spec, and finish type. You need an on-site look for a firm number because subgrade and access vary significantly between properties.
What drives the price on a 20x20 pad
Thickness spec
A 4-inch slab is the standard for passenger vehicles on a 20x20 pad. If you're regularly parking a truck over 6,000 lbs or towing a trailer, 5 inches is worth the additional $300–$500 on a 400 sq ft pour. We match thickness to load — we'll ask what you're parking on it during the site visit and spec accordingly.
Site preparation
A flat, stable site that drains naturally is the cheapest situation. Lawrence County's red clay neighborhoods often need 4–6 inches of compacted crushed stone base to isolate the slab from seasonal soil movement. Rural properties with rocky upland subgrade need less. We look at this before we quote — base prep isn't something to guess at on a slab that needs to last 30+ years.
Demo of existing surface
Replacing old asphalt or concrete adds $1.50–$2.50 per square foot for break-up and haul-off. On a 400 sq ft pad, that's an additional $600–$1,000 on top of the pour cost. If your existing surface is just gravel or bare ground, demo isn't a factor.
Finish type
A standard broom finish is included in the base price. Stamped concrete or exposed aggregate adds $4–$12 per square foot to the cost of a 20x20 pad — meaningful on a small slab. For most driveways, broom finish is the right call.
| Scenario | Estimated installed cost |
|---|---|
| Basic 20x20, 4 in, broom finish, clean site | $2,800 – $3,600 |
| 20x20, 4 in, demo old asphalt first | $3,400 – $4,400 |
| 20x20, 5 in with rebar, clay subgrade | $3,800 – $5,200 |
| 20x20, 4 in, stamped finish | $5,200 – $8,000 |
What's included in our quote
When we quote a 20x20 slab in Lawrenceburg or Pulaski, the price covers: excavation to stable subgrade, compacted crushed stone base, wire mesh reinforcement, concrete placement and finishing (broom), control joint cutting, and cleanup. What it doesn't include unless specified: demo of an existing surface, stamped or colored upgrades, or significant grading beyond establishing drainage slope.
How long before you can use it
Foot traffic is fine at 24–48 hours. Passenger vehicles at 7 days. Heavy trucks and trailers should wait the full 28 days. Driving on fresh concrete too early is the single most common cause of surface cracking we see on jobs poured by other contractors. We leave you with written cure instructions after every pour.
Frequently asked questions
How much does a 20x20 concrete driveway cost in Tennessee?
In Lawrence and Giles County, a 20x20 driveway (400 sq ft) runs $2,800 to $5,200 installed. Base scope includes excavation, gravel base, wire mesh, 3,500 PSI concrete, broom finish, and joint cutting. Site conditions, thickness, and demo determine where on that range you land.
Is 20x20 big enough for two cars?
A 20-foot-wide driveway fits two standard passenger cars side by side. For two full-size trucks, 24 feet is more comfortable. If you're borderline, adding 2–4 feet of width on a 400 sq ft pad adds only $300–$600 and makes the driveway significantly more usable.
How thick should a 20x20 driveway be?
Four inches for passenger vehicles. Five inches for pickups or SUVs over 6,000 lbs. Six inches for heavy trucks, trailers, or equipment. We spec this based on what you're actually parking — it's a conversation we have at the site visit, not after the pour.
Does a 20x20 driveway need a permit in Lawrenceburg or Pulaski?
A new connection to a city street in Lawrenceburg typically requires a driveway permit. Rural driveways on state roads need a TDOT permit. We handle permit applications — you don't need to visit any office.
What does your quote include?
Excavation, compacted stone base, wire mesh, concrete, broom finish, joint cutting, and cleanup. Demo and decorative finishes are separate line items discussed at the site visit.
Ready for a free estimate on your concrete driveway in Lawrenceburg, Pulaski, or surrounding Middle Tennessee? Call (931) 369-2134 or request a quote online. See our concrete driveway service page and our full Lawrenceburg driveway pricing guide.