later. We then insert a nozzle through the hole and pump grout under the slab. As the void under the slab begins to fill up, the slab is hydraullically lifted to its level position. We then patch the holes, matching the color as closely as we possibly can. The price will be determined by the size and difficulty of the job, but will range from $500 to whatever it might take. We have done very large jobs that might range in the many thousands, but they are the exception. Please go to our web site to learn more: www.concreteraisingnc.com. Also, for those who might be in the Raleigh, North Carolina area, please come and see us at our booth in the Southern Ideal Home Show in April.