- 1997Median year homes were built, San Marcos (ACS)
- ComfortMost extensive soil series, Comal and Hays Counties (NRCS)
- 35.7 inYearly rain, New Braunfels
- 16 mi northeast of New BraunfelsStraight-line distance
Ground and housing
What is under San Marcos homes
Comal and Hays Counties soil mapping is led by the Comfort, Brackett, Rumple series. Ask your crew which one sits under your lot before they quote. Half of San Marcos homes were built before or around 1997 (Census ACS), a useful clue to original parts and methods. Permit rules for San Marcos are on the official site: https://www.sanmarcostx.gov
Services here
What we handle in San Marcos
San Marcos on the Balcones Fault
What shapes foundations here
Hays County seat
San Marcos is the Hays County seat, home to Texas State University, and was named the fastest-growing US city in 2013 and 2014. Its limits reach into Caldwell and Guadalupe counties.
On the Balcones Fault
The city sits on the Balcones Fault, the boundary between the Hill Country to the west and the coastal plains to the east. Ground conditions can change across town, from shallow rock to deep clay.
Springs and river
The San Marcos River rises from the Edwards Aquifer at San Marcos Springs. Low areas near the river and creeks have a history of flooding, so drainage deserves attention.
Rentals and older homes
With a large university, many homes are rentals. Owners often need to schedule inspections and repairs around tenants.
Fast-built subdivisions. New subdivisions along I-35 sit on graded pads. Poorly compacted fill can settle within a few years.
Local issues
Common foundation issues in San Marcos homes
Cracks in a rental property
Document them with dated photos and an elevation survey so you can track movement between tenants.
Home west of I-35 on rock
Movement on rocky lots usually comes from fill or runoff; drainage may solve it.
Home east of I-35 on clay
Seasonal heave and settlement are common; piers may be needed if movement keeps growing.
Before you sign
Questions to ask a crew working here
Soil type. Ask whether your lot is on rock, clay or fill.
Tenant plan. Ask how they schedule work in occupied rentals.
Survey. Ask for before and after elevation readings.
Permit. Ask whether the City of San Marcos requires a permit for pier work or drainage changes, and who pulls it.
Photos
