
On the Brazos, halfway up I-35
Barndominium Builders in Waco, TX
Farm and ranch land around Waco makes room for a shop house. Plan for the soil, the river and the storms.
- Free on-site land visits
- Written, line-item estimates
- County permit and septic research included
Your Barndo Plan for McLennan County
Barndominium builders serving Waco work with land spread out along the Brazos River, in the middle of I-35 between Dallas and Austin. Waco is the county seat of McLennan County, which covers 1,060 square miles, 1,037 of them land. Other McLennan County cities include McGregor, Mart, Valley Mills, Bruceville-Eddy and Golinda, and rural land around them is where acreage barndos usually go.
Step 1: Know the river and the lake
The Brazos and Bosque rivers meet in Waco, and Lake Waco is a reservoir on the city's western edge. Low land near either river or the creeks that feed them deserves a floodplain check before you close on it. Floodplain status changes the pad height, the septic layout and sometimes whether a building can go where you want it.
Step 2: Check the soil
The Houston Black series, the classic Blackland clay, is mapped across the Blackland Prairies and eastern Grand Prairies of Texas and is described by USDA as a fine, smectitic clay with high shrink-swell potential and very slow permeability. Where your lot has that kind of clay, the slab needs to be designed for movement, and roof water has to be carried well away from the foundation.
Step 3: Plan for wind
Waco has a hard tornado history. On May 11, 1953, an F5 tornado hit downtown and killed 114 people. It was the first tornado tracked by radar and helped lead to a national storm warning network. For a barndominium, that history is a reminder to take anchorage, connections and door openings seriously. Large shop doors catch wind, and a storm shelter or safe room is worth discussing at design time.
Step 4: Sort out permits
Inside Waco or another McLennan County city, local building permits apply. In a city's extraterritorial jurisdiction, Texas law gives that city's building code control. In unincorporated county areas covered by Local Government Code Chapter 233, Subchapter F, Section 233.153 requires new single-family homes to meet the IRC as published May 1, 2008, or the county seat's version, and states that the subchapter does not require prior county approval to start construction or authorize county zoning. We confirm which rules apply to your parcel before drawings are finalized.
Step 5: Septic and water
Rural lots without city sewer need an on-site sewage facility. TCEQ's OSSF program publishes a county map of authorized agents who issue septic permits. Very slow-draining clay often means an aerobic or other engineered system rather than a basic drain field, so the site and soil evaluation should happen early.
Step 6: Build for the weather
Waco's records run from 114 degrees on July 23, 2018, down to minus 5 on January 31, 1949. Average yearly precipitation at the regional airport is 36.40 inches. A metal-sided home here needs a continuous insulation plan to keep heat out in summer and avoid condensation on cold nights.
Growth around Waco
McLennan County grew from 234,906 people in 2010 to 260,579 in 2020, up 10.9 percent, with 105,817 housing units. It is slower growth than the Austin corridor, which is one reason buyers still find larger tracts here.
Have McLennan County acreage in mind? Call (254) 401-5175 or
to start.Waco Area Facts for Builders
- County seat. Waco is the county seat of McLennan County, which covers 1,060 square miles.
- Rivers. The Brazos and Bosque rivers meet in Waco; Lake Waco borders the city on the west.
- 1953 tornado. An F5 tornado struck downtown Waco on May 11, 1953, killing 114 people; it was the first tornado tracked by radar.
- Climate records. Waco's records are 114 F (July 23, 2018) and minus 5 F (January 31, 1949), with 36.40 inches of average yearly precipitation.
- Growth. McLennan County grew 10.9 percent between 2010 and 2020, to 260,579 residents.

Waco Questions
Can a barndominium be built near the Brazos River?
Often, but floodplain mapping comes first. If part of the property is in a flood zone, we place the building on higher ground and set the floor elevation to match the rules.
Should I add a storm shelter to a barndo near Waco?
Given the area's tornado history, it is worth considering. A reinforced safe room can be planned inside the floor plan or the shop area during design.
What septic system will my McLennan County lot need?
That depends on the site and soil evaluation. Tight clay that drains slowly often rules out a simple drain field. The county's authorized agent, listed by TCEQ, issues the permit.
Do small towns like McGregor or Mart have their own rules?
Incorporated towns set their own permits and zoning, and their ETJ follows the town's building code. Outside those areas, county and state rules apply.
Free Estimates in Waco, TX
Tell us about your land near Waco and the barndo you want on it.
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