What are foundation and soil conditions in ZIP code 74127 (Tulsa)?

Reviewed by Preston · Updated 2026-11-12

In short: ZIP code 74127 has a mix of ground: about 21% high shrink-swell soil, 13% moderate and 34% low ¹. The soil survey also maps a water table within 2 feet of the surface at some point in the year under about 46% of it and bedrock within 40 inches under about 46% ¹.

What does the soil survey show for 74127?

ZIP code 74127 covers about 21 square miles of land and had 15,669 people in the 2020 Census ²; its center falls in Tulsa.

Which soils matter most for houses in 74127?

• Niotaze, about 10% of the area ¹: Moderately deep, somewhat poorly drained, slowly permeable soils that formed in residuum from weathered shale and colluvium from sandstone of Pennsylvanian age ³.
• Bigheart, about 9% of the area ¹: Shallow, well drained to somewhat excessively drained soils formed in material weathered from sandstone of Pennsylvanian age ⁴.
• Kamie, about 7% of the area ¹: Very deep, well drained soils that formed in material weathered from predominantly loamy alluvium of Pleistocene age ⁵.
• Choska, about 5% of the area ¹: Very deep, well drained, soils on low terraces of flood plains ⁶.
• Steedman, about 5% of the area ¹: Moderately deep, well drained or moderately well drained, slowly permeable soils that formed in material weathered from shale containing thin strata of sandstone of Pennsylvanian age ⁷.
• Urban land, about 11%, is ground the survey maps as covered by buildings and pavement rather than classifying its soil ¹.
• Rock outcrop, about 6%, is exposed bedrock ¹.

What does this mean for houses in 74127?

Shallow water. A water table near the surface, often perched on tight clay or shale in winter and spring, keeps soil at slab edges and in crawl spaces wet and swollen. See groundwater and perched water, crawl space moisture and surface drainage and grading.

Shallow rock. Where bedrock is close to the surface, lots are often cut into rock on one side and built up with fill on the other, so fill settlement and slope creep matter more than clay swell, and piers can stop at very different depths across one house. See depth to rock from borings.

Flood-prone soils. Floodplain soils are layered stream deposits: softer, wetter and more variable than upland soils, and they flood. See soft soil consolidation and Quaternary alluvium and terraces.

Which soils cover 74127?

Looking for a foundation company near ZIP code 74127?

Companies that serve ZIP code 74127 can appear on the company map in the Homeowner Hub. Paid listings there are marked Sponsored; the library and the AI guide don't rank or recommend any of them.

Buying or selling a house in ZIP code 74127? Realtors who serve the area can be on the same map, also marked Sponsored, and for realtors covers the seller disclosure form, inspections and the sale timeline. Seeing cracks at home? Start with for homeowners.

How were these numbers measured?

We overlaid the ZIP code tabulation area (the Census approximation of a ZIP code) from the Census Bureau ² on the USDA soil survey's map units ¹ and added up the area of each soil. Where a map unit is a mix of soils, its area was split by the percentages the survey lists for its major soils, so shares leave out minor inclusions and do not add to 100%. Shrink-swell is rated by the linear extensibility of a soil's most expansive layer, the survey's measure of how much it changes length between wet and dry (6% or more is high). Water table, bedrock and flooding come from the survey's map-unit summaries: the shallowest water table in any month, the shallowest bedrock, and the most common flooding frequency. Bedrock here includes soft, weathered sandstone and shale that a pier can push through, so it is not the depth where piers stop. These are mapped averages, not a test of any one lot; fill, grading and the soil actually under a house can differ, which is why a site visit or soil boring still decides a repair.

Related

• Tulsa
• Tulsa metro
• ZIP code 74103
• ZIP code 74106
• ZIP code 74119
• ZIP code 74107
• Shrink-swell and the active zone