Depending on the size of the project, condition of the concrete slab, and complexity of the design, the pricing of decorative concrete flooring may range between $4-$6 per square foot using existing concrete, or between $6-$10 per square foot using a concrete overlay. The important points to note here are that decorative concrete flooring is almost always considerably less than the material it mimics (e.g., marble and other forms of natural stone); and basic applications, such as acid staining, are also usually notably less than competing traditional alternatives, such as quality carpets, ceramic or porcelain tiles, and hardwood or wood laminates. There is no other flooring media that provides such a high end look at such an affordable cost.
On top of this, because of the durability of decorative concrete, there are long term savings involved as well. Unlike with carpeting or tile, a stained concrete floor will never need to be torn out or replaced. It will uniquely withstand both time and abuse. So beyond the initial investment, the only costs involved with a decorative or stained concrete floor are for periodic maintenance.