A 15x15 patio is the square entertaining patio: 225 square feet, enough for a full dining set with real circulation space, or a centered table under an umbrella with room left over. Square footprints host well because nobody sits in a dead-end corner.
225 square feet at example rates
The example rates below come from our demo calculator. Treat them as a sanity check, not a market price. A working contractor’s quote comes from his own rates.
| Finish | Example rate | 15x15 (225 sq ft) |
|---|---|---|
| Standard broom | $9 / sq ft | $2,025 |
| Colored | $12 / sq ft | $2,700 |
| Stamped | $16 / sq ft | $3,600 |
Two things specific to a 15 foot square
First, joints. A 4 inch patio wants control joints at roughly 10 to 12 foot spacing, and 15 feet is past that. So a 15x15 typically gets jointed into four quadrants. On a square patio those joint lines are front and center, which is why a good contractor will talk joint layout with you before pour day. It is a design decision, not just a crack-control one.
Second, the finish upgrade math scales fast now. On this footprint the gap between the example broom rate and the example stamped rate is $1,575. That same upgrade on a 10x12 was half as much. The bigger the patio, the more the finish decision is the budget decision.
Beyond the base rate
The table assumes a clear, level, truck-accessible site. Off that ideal: tear-out of an existing surface adds an example $4 per square foot, $900 here. Site prep and grading adds an example $2, $450. Sealing, another example $2, is $450 and earns its keep over colored or stamped work. And thickness stays at the typical 4 inches for patios, so the money moves with finish and site work, not with extra concrete depth.
The concrete patio cost calculator handles any other dimensions, or step up to the 16x16 patio page if you are sizing for a sectional. The full pricing method is in how to price a concrete patio.
If you are the one writing the quotes, PriceDesk puts this calculator on your phone with your own rates. Free for 14 days.