Size is only the starting point
A small backyard patio with narrow access can involve different work from a larger slab beside a driveway. Existing paving, elevation changes and the distance from delivery access influence construction. Discuss the usable layout before treating square footage as the only pricing variable.
Price the finish deliberately
Plain broom-finished concrete, borders and stamped patterns involve different materials and labor. Ask whether coloring, sealing and selected edge details are included. Compare the maintenance requirements as well as the initial price.
Identify work outside the slab
Drainage corrections, landscape removal, irrigation changes and electrical or gas work can be separate. A patio cover, outdoor kitchen or hot tub may require a support design beyond ordinary flatwork. Have these plans reviewed before setting the concrete budget.
Get a scope you can compare
A useful estimate identifies dimensions, elevations, preparation, finish, curing protection and restoration. Ask what happens if excavation reveals unsuitable material. Confirm the expected construction sequence and how long access will be restricted.