Foundation repair in Seguin, from courthouse-square bones to new corridor slabs.

Each era needs its own playbook. The old homes need beam, block, and crawlspace moisture work more often than piers; the mid-century slabs are deep into their clay-cycle years; and the new sections are hitting their first droughts on fresh pads.

AREAS WE SERVE IN SEGUIN: THE COURTHOUSE SQUARE AND ITS VICTORIAN STREETS, THE STARCKE PARK AND TLU-AREA NEIGHBORHOODS, NAVARRO, AND THE NEW CORRIDOR GROWTH — MILL CREEK CROSSING, CORDOVA CROSSING, AND THE NORTHEAST SUBDIVISIONS TOWARD I-10 AND SH 130.

The ground in the Guadalupe valley

Seguin sits on Blackland clay laced with Guadalupe River alluvium.

Seguin is the seat of Guadalupe County, built on the alluvial plain of the Guadalupe River. The uplands away from the river carry the Blackland Prairie's high shrink-swell clay — deep, dark, and strongly expansive, the same wet-dry cycle that works foundations all along the corridor. But near the river the soils change: the USDA actually named a soil series after this place — the Seguin series — for the deep, well-drained silt loams and clays that formed in river-terrace alluvium along the Guadalupe. So Seguin is a two-soil town: expansive upland clay versus river-bottom alluvium, with markedly different moisture behavior between them.

That distinction drives the diagnosis. On the upland clay it's the classic cycle — drought drops the perimeter, a wet spring pushes it back. Homes nearer the river live with higher water-table variability, so their slab edges respond to wet-dry swings faster than the town average, and the oldest slabs — with the most cycles absorbed — move most. Reading which ground your house sits on is exactly what the free elevation survey is for.

One of the oldest towns in Texas

Courthouse-square Victorians, a mid-century grid, and new corridor slabs.

Seguin was founded in 1838 and is one of the oldest towns in Texas, and its foundations span the whole history. Around the courthouse square and the Texas Lutheran University blocks sit pier-and-beam Victorians and early-1900s homes; near Max Starcke Park, opened during the 1938 centennial along the river, the neighborhoods run older too. These homes usually need crawlspace-level work — beams, sills, blocks, and moisture control — not perimeter piers, and that's typically a friendlier scope than a slab job.

The established mid-town grid holds 1950s–70s slabs built lighter than modern pads, now deep into their clay-cycle years and showing the classic drought-corner cluster. And the new growth pushes northeast toward I-10 and SH 130: Mill Creek Crossing (developing since about 2008, with much of its housing built around 2015), Cordova Crossing, and the newer Navarro-ISD corridor subdivisions sit on engineered pads hitting their first droughts around years three to seven, right as builder coverage ends — often at prices that undercut closer-in San Antonio suburbs. Each era needs its own playbook, and a dated elevation map is what tells us which one your house is on.

Nearby

Also serving the communities around Seguin.