If you are pouring new concrete, either over a floor covering, or as a micro-topping to a concrete slab, then the process can get rather expensive. In the end you can end up paying as much as $15 - $30 per square foot for a concrete floor, which is more than many premium surface covering products.However this has to be balanced by the fact that concrete flooring in a kitchen can last practically forever if properly cared for.That means that long after you would have paid for a replacement for other materials, concrete will still be solid, strong, and looking the same as the day you first installed it.owever this has to be balanced by the fact that concrete flooring in a kitchen can last practically forever if properly cared for. That means that long after you would have paid for a replacement for other materials, concrete will still be solid, strong, and looking the same as the day you first installed it.