Pier & Beam Foundations
in Houston, TX

How much does a pier and beam foundation cost in Houston?

We quote it per job, off your stamped plan and your soil boring. A pier and beam foundation costs more than a slab on the same footprint. The piers, grade beams, floor framing and crawl space are each their own piece of work. Five things move the number. Pier count and depth come off the soil boring. Floor height comes off the flood elevation. Then beam spans, drill rig access, and whether an old foundation has to be torn out first. People ask what a foundation costs for a 2,000 square foot house. The honest answer is that two houses that size on different lots can need very different pier counts. We do not publish a price per pier, because a number given before the boring is a guess. Ask for the free written estimate and you get every line. To compare, see concrete foundations and post-tension slabs.

Is pier and beam better than a slab in Houston?

The soil report, the flood elevation and the budget decide it, in that order. A slab costs less and is simple to maintain. Pier and beam gives you access under the floor and lets you raise the house without hauling in dirt. Here is the Houston decider. In the unincorporated Harris County 100-year floodplain you cannot use fill to elevate a house. The county calls for an open foundation, piers or foundation walls with flood openings, designed by a licensed engineer. Inside city limits, Chapter 19 puts a new house two feet above the 500-year flood elevation. On a lot near a bayou that often means a raised floor on piers is the practical answer. Either way, Houston borings come back with plasticity index numbers in the 40s and 50s, and the code calls soil expansive at 15. So both systems need an engineer's stamp here. Read more on our concrete slabs page, or send us the soil report and we will tell you which one your lot wants.

How deep and how far apart do the piers go?

Depth and spacing come off the stamped plan written for your lot. At documented Houston job sites, the clay that swells and shrinks with the seasons runs 10 to 25 feet deep. A pier that stops inside that zone moves with it. A pier that reaches below it does not. So the geotech report sets the bearing depth, and the engineer sets the shaft size and the bell. Houston crews call a belled drilled pier a bell bottom pier. The wider base spreads the load and resists uplift when the clay swells. Spacing follows beam size and the loads coming down, so a two-story house and a one-story shop will not share a layout. We stake every pier center off the plan, and the engineer inspects the open holes before concrete. Our drilled piers page covers the drilling side in more detail.

Do I need a permit or a floodplain permit for a pier and beam foundation?

Yes. A building permit comes from the City of Houston if the lot is inside city limits, or from Harris County Engineering if it is unincorporated. The application needs a foundation plan and sections with a licensed engineer's seal. Houston's first structural inspection now needs a legal form survey on site, and the city says so for pier and beam foundations by name. In a mapped floodplain there is one more step: a floodplain development permit and an elevation certificate when the floor is set. Since January 2018, a Harris County Class II floodplain permit calls for a pier and beam foundation with extra wind design. We pull all of it and track the inspections. If the lot still needs clearing or grading first, our site preparation and yard drainage crews run ahead of the drill rig.

Can you add on to an old pier and beam house in the Heights or Montrose?

Yes, and it is some of our favorite work. In the Heights, the city's own preservation manual says most homes sit on pier and beam. The first floor is about two and a half to three feet off the ground, and the foundation is skirted in lattice or lap siding. We drill new piers and pour new grade beams to match that floor height, so the addition does not step up or down. Exterior work in the Heights, Norhill and Woodland Heights historic districts goes through a Certificate of Appropriateness, and we build to what the commission approves. New beams tie to old with engineered connections, and the crawl space stays vented. People also ask how long a pier and beam foundation lasts. A well drained, well built one is serviceable for the life of the house with normal upkeep. Its parts can also be replaced one pier at a time, which a slab cannot. That is why 1920s houses in the Heights are still standing on them. If the old beams need work first, see foundation repair.

My pier and beam house is out of level. Is that a repair or a new foundation?

Almost always a repair: shimming, re-piering or sistering a beam. That work lives on our foundation repair page, and we will tell you which one you need. The Houston causes are familiar. The Foundation Performance Association says trees near the footprint cause most foundation repairs here, and a crawl space does not change that. A plumbing leak under the house, or a pier that stopped inside the active zone, does the rest. Grading the ground away from the piers at two to five percent and keeping the crawl space dry on all four sides fixes a lot of it. A French drain along the wet side helps too. A full new foundation only makes sense when the beams are rotted through or the piers are undersized everywhere. Call (832) 576-3278 and we will look before we quote.