Foundation Tunneling in Houston, TX

Tunneling in Houston generally runs $250 to $450 per linear foot, and tunnel length is by far the biggest cost driver. Dense clay digs slower than sandy fill, and obstacles like patios, sidewalks, mature trees, and AC pads can force a longer route to reach the work area. We measure the route and give you a written per-foot scope before we dig, so the number does not move on you mid-project. Keep in mind this covers the access, the pier work, and the restoration. Whatever your licensed plumber charges for the pipe repair is separate and billed by them.

No, and we would rather be plain about that up front. Pipe repair under a slab is licensed plumbing work, so your plumber performs it and handles the permit and inspection. What we do is dig the tunnel, keep it open, shored, and lit while they work, then restore the soil support and close it up. If you do not have a plumber lined up yet, we are glad to coordinate scheduling so the tunnel is not sitting open longer than it needs to be.

Breaking out interior concrete means jackhammers running inside your living space, dust in everything, and tile, wood, or carpet torn out and replaced afterward. It also puts new holes in the slab you are trying to keep strong. Tunneling keeps all of that outside, so your finished floors stay whole and your family can stay in the home. We will be straight with you about the tradeoff: tunneling usually costs more than an interior breakout and it takes longer. Most homeowners still choose it once they price out replacing the flooring.

This is the part that separates a thorough tunnel job from a careless one. Standard soil compaction equipment does not fit inside a three-foot tunnel, so a crew that simply shovels the dirt back leaves voids under your slab. Those voids are unsupported soil, and they are a common cause of new settlement a year or two down the road. We backfill in lifts and then mud-pump a slurry into the tunnel to fill the voids and restore bearing support against the underside of the slab. That method costs more to perform, and it is the only one we use.

Most tunnels take two to five days depending on soil conditions, the length of the run, and how much pier or plumbing work happens underneath. All of the digging happens outside, so there is no jackhammering indoors and no reason to move out. You will have a work area and a spoil pile in the yard for the duration, and we keep it marked off for safety while the tunnel is open. We give you a firm schedule at the estimate and tell you the day we expect to backfill.

Yes. Piers we install through a tunnel carry the same transferable warranty as the rest of our foundation work, so it follows the house to the next owner if you sell. We also stand behind the backfill and mud-pumping, because restoring support under the slab is the entire point of doing the work properly. You get written documentation of the tunnel route, its measured length, and the backfill method for your records and for resale.