Who permits a barndominium in Bastrop, TX: the city or the county?
Outside that line, Bastrop County Development Services issues a development permit for any development anywhere outside the cities, and Bastrop County Environmental and Sanitation permits the septic. The county issues no building permit and no certificate of occupancy and inspects nothing itself. Even so, three inspections are required on a new house there, at the foundation, at framing and mechanical, and at completion, because the Commissioners Court adopted residential building code standards by resolution on September 14, 2009. Your builder contracts those inspections with a private inspector. A builder who cannot tell you which desk your tract answers to has not read your map.
Start with the city limit line. Inside the City of Bastrop, the city permits residential construction under the International Residential Code and publishes a checklist for Infill Development New Residential Construction. The code in force is the 2018 International Residential Code, adopted as part of the 2018 IBC family, with the 2023 National Electric Code and the 2000 International Property Maintenance Code.
Inside those limits the city is also your septic authority. Bastrop County has exactly two on-site sewage authorized agents: Bastrop County for all of the county but the City of Bastrop, and the City of Bastrop for its city limits. The Lower Colorado River Authority, which permits septic around the lakes, has no jurisdiction here.
Outside the line the answer changes. Bastrop has subdivision authority inside the city limits and throughout its extraterritorial jurisdiction, and an interlocal agreement gives Bastrop County review of part of it, so an ETJ tract can face both city subdivision review and county development permit review. Septic in the ETJ goes to the county, because a state delegation of the septic program to a municipality covers only the incorporated area. Ask Bastrop County Development Services which reviews apply to your parcel. The full picture is on the Bastrop County permit page, and the six-county comparison is in the county-by-county permit page.
City of Bastrop Building and Permitting, as read September 13, 2026.
City of Bastrop Development Services, as read September 13, 2026.
City of Bastrop Development Process, as read September 13, 2026.
TCEQ OARS county search, Bastrop County (CNTY_CD 11), as read September 13, 2026.
TCEQ OARS county search, identical entry returned for Travis, Burnet and Llano counties, as read September 13, 2026.
TCEQ publication RG-472, 30 TAC 285.10(a), as read September 13, 2026.
Bastrop County Development Services, as read September 13, 2026.
Which Bastrop County office permits the building, septic, floodplain and driveway?
In the unincorporated county a development permit covers all development, and the county counts a single-family home, a manufactured home, an RV and a tiny home as development. The permit class is set by the parcel's relationship to the mapped 100-year floodplain, so floodplain review rides inside the permit instead of arriving as a separate one. Here is who signs off.
Where there is no public sewer, the development permit and the septic permit are applied for at the same time. The permitting authority has 30 days after the papers come in to say yes or no. Only an installer licensed or registered by TCEQ may build the system. The septic permit walkthrough walks the application through.
Building: Bastrop County Development Services, on a development permit, not a building permit.
Septic: Bastrop County Environmental and Sanitation, the state's authorized agent everywhere outside the city.
Floodplain: the Bastrop County Floodplain Administrator, inside Development Services.
Driveway: Bastrop County Development Services, engineering inspector, on a county-maintained road, and TxDOT on a state highway.
The 911 address rides on the same county application.
TCEQ, Getting a Permit for an On-Site Sewage Facility, as read September 13, 2026.
TCEQ, Occupational Licenses: On-Site Sewage Facilities (Septic Systems), as read September 13, 2026.
Bastrop County Development Services, as read September 13, 2026.
What inspections do barndominium builders in Bastrop, TX have to arrange?
Three inspections happen even though the county inspects nothing itself. Its Commissioners Court adopted residential building code standards by resolution on September 14, 2009, so a new house in the unincorporated county must meet the code that resolution brought in. The timing is fixed: foundation before the concrete is placed, framing and mechanical before drywall, and on completion. The builder contracts those inspections, not the county, and the inspector has to be one of six listed qualified persons.
Texas issues no state license for general contracting, and the Texas Residential Construction Commission no longer exists: it was abolished, and its enabling Act lapsed on September 1, 2009. Every builder you meet here is an independent builder. In Bastrop County that carries weight, because the only sign-off on your framing comes from an inspector your builder hires, not from the county. Licensed attaches to the trades instead: septic installer, electrician, plumber. Ask who they contract as the third-party inspector, and ask for the reports from their last Bastrop County house. Cross into Caldwell County and the same house gets a Residential Construction Permit that is not a building code permit, with no county inspection of framing or electrical work. Read Lockhart if you are shopping both sides of that line, and the build sequence on turnkey barndominium construction.
Texas Local Government Code Sec. 233.152, as read September 13, 2026.
Texas Local Government Code Sec. 233.153(a), as read September 13, 2026.
Texas Local Government Code Sec. 233.154(a)(1), as read September 13, 2026.
Texas Local Government Code Sec. 233.154(a)(3), as read September 13, 2026.
Office of the Texas Governor, Business Permit Office, Texas Business Licenses and Permits Guide, as read September 13, 2026.
Texas Sunset Advisory Commission, as read September 13, 2026.
TCEQ, Occupational Licenses: On-Site Sewage Facilities (Septic Systems), as read September 13, 2026.
Texas State Board of Plumbing Examiners, as read September 13, 2026.
Texas Department of Licensing and Regulation, Electricians program, as read September 13, 2026.
Bastrop County Development Services, as read September 13, 2026.
Caldwell County Development Ordinance, revised February 14, 2023, as read September 13, 2026.
What is under a Bastrop lot: a clay pan and Houston toad habitat?
Ask your septic designer one question before anything else: does a clay pan sit under your lot? Post Oak Savannah uplands are sands and sandy loams, bottomlands are clay or clay loams, and a dense clay pan almost impervious to water underlies all of those soil types at only a few feet deep. If it is under you, ask what it does to drainfield sizing and to drainage around the pad, and get that answer before the site plan is drawn. Bastrop County permits every septic installation regardless of acreage, setting aside the state exception for one dwelling on ten acres or more, and its minimum lot size is half an acre with a public water supply and one acre without.
The Lost Pines is over 75,000 acres of loblolly pines across parts of five counties, the westernmost stand of loblolly pine in the United States. Its seasonally moist sandy soils are critical habitat for the endangered Houston toad, federally listed since October 13, 1970. Critical habitat was designated in portions of Bastrop and Burleson counties on January 31, 1978. The county's permit list includes a Lost Pines Habitat Conservation Plan decision where the tract is in the covered area. Ask Development Services whether your parcel is in it, and ask before you clear a single pine.
Texas Parks and Wildlife Department, as read September 13, 2026.
TCEQ adopted rule text, 30 TAC Chapter 285, Rule Project No. 2021-030-285-CE, section 285.3, as read September 13, 2026.
Texas Parks and Wildlife Department, Bastrop State Park, as read September 13, 2026.
U.S. Fish and Wildlife Service, as read September 13, 2026.
Bastrop County Development Services, as read September 13, 2026.
Does a house well near Bastrop need a Lost Pines permit?
It needs registering either way. The Lost Pines Groundwater Conservation District, which covers Bastrop and Lee counties from its office in Giddings, has barred drilling or running any new well without first registering it since June 22, 2000. For a house well the paperwork is the district's Form 100 drilling application, approved when it is complete and the spacing works, and the district then issues a registration certificate. That certificate lapses if the well is not finished and its driller's log filed with the district within 365 days, so time the registration to the drilling, not to the closing.
Whether the well also needs an operating permit turns on the tract. A house or stock well built so it can never draw over 25,000 gallons in a day is exempt on a tract of more than ten acres. Under a rule added October 15, 2025, the same well on less than ten acres can qualify too, but only at the general manager's discretion, and the question can go to the board. A well serving a subdivision that has to be platted is never exempt. Exempt wells pay the district no fees but still report production.
The spacing rule is short. An exempt well sits at least 50 feet from the nearest property line, against 100 feet for a permitted well. Where a lot is too tight, the general manager can approve a variance without a hearing if every neighbor inside the line signs a notarized waiver. Ask the driller to check the district's online well database for nearby wells and depths before choosing the spot, and keep the well clear of where the septic designer wants the drainfield.
Rules of the Lost Pines Groundwater Conservation District, last amended October 15, 2025, Rules 4.1.B and 4.3.D and F; Form 100, as read October 27, 2026.
Rules of the Lost Pines Groundwater Conservation District, last amended October 15, 2025, Rules 2.3.A and 3.1.A and G, as read October 27, 2026.
Rules of the Lost Pines Groundwater Conservation District, last amended October 15, 2025, Rules 4.4.A, 8.2.A and 8.3.B, as read October 27, 2026.
What does an Aqua WSC water tap cost for a new house near Bastrop?
Much of rural Bastrop County buys water from Aqua Water Supply Corporation, which says more than 100,000 residents in the county and parts of its neighbors rely on it. Check its service area map for the tract before planning a well at all. Its posted connection price for one house, set straight off an existing main with no line extension and no road crossing, is $9,070 with a 5/8-inch meter: $470 to set the meter, an $8,400 system development fee, a $100 membership and a $100 customer service inspection. A 3/4-inch meter totals $14,614 and a 1-inch meter $20,492. A lot in a subdivision that still needs capacity reserved pays $9,670.
Timing moves that number. Aqua has published its system development fee for the next several years, charged when the lot connects: $8,400 per living unit equivalent today, $9,700 from June 1, 2027, then $11,200, $12,900 and $14,900 in each June that follows through 2030. A build that connects before June 2027 saves $1,300 on the fee alone. A tap that needs a line extension or a road bore is priced beyond these figures, so get that answer in writing before the lot is bought.
Two rules shape the site plan. One meter serves one dwelling: a second house, a guest quarters or a barndominium beside an older home needs Aqua's knowing approval and a second monthly charge, and a meter feeding homes on separate parcels can be shut off. Aqua can also disconnect where land was split against the county's subdivision rules. Monthly service starts at a $38.60 customer charge, plus $5.80 per 1,000 gallons up to 10,000 gallons, $8.70 up to 20,000 and $10.40 above that. Buying a lot with a membership already on it costs $25 to transfer.
Aqua Water Supply Corporation home page, as read October 27, 2026.
Aqua WSC Rates and Fees, as read October 27, 2026.
Aqua WSC Water Service, as read October 27, 2026.
What does the 2011 fire scar change about building near Bastrop?
The 2011 Bastrop County Complex fire covered 32,400 acres, with 75 percent of it burning at extreme fire intensity. It destroyed 1,660 homes and 36 commercial buildings and burned for 37 days. Texas A&M Forest Service defines three home ignition zones by distance: Immediate at 0 to 5 feet, Intermediate at 5 to 30 feet, and Extended at 30 to 100 feet. In the intermediate zone tree crowns should be at least 18 feet apart and the mature canopy no closer than 10 feet to the home. Settle those distances before the site plan is drawn, because they decide where the house sits and which pines come down.
Ask the insurer, in writing, what it wants to see in the immediate zone. Ask the lender how it will handle the appraisal, because where few truly comparable sales exist an appraiser may use properties that are not truly comparable if the analysis is documented. Texas Farm Credit and Capital Farm Credit both state that they finance barndominiums. Fannie Mae's Selling Guide recognizes single-closing construction-to-permanent financing, where the construction loan converts when building is finished. The barndominium cost page separates what the building costs from what the site costs on top of it.
Texas A&M Forest Service, as read September 13, 2026.
Texas A&M Forest Service, as read September 13, 2026.
Fannie Mae Selling Guide, as read September 13, 2026.
Fannie Mae Selling Guide, as read September 13, 2026.
Texas Farm Credit, as read September 13, 2026.
Capital Farm Credit, as read September 13, 2026.
What should you ask Bastrop barndominium builders first?
Pull the flood map at the FEMA Flood Map Service Center, then file the development permit and the septic permit together. Then ask every builder the same three questions. Which Bastrop permit class your parcel falls in, and why. Who they will contract for the foundation, framing and completion inspections. What their septic designer found in your soil, including the pan. The rest of the sequence, from raw tract to finished home, is in building a barndominium in Central Texas.
FEMA Flood Map Service Center, as read September 13, 2026.
Bastrop County Development Services, as read September 13, 2026.
Close by: Cedar Creek, Smithville, Elgin, Paige, Red Rock, Rosanky. The whole county: Bastrop County. The next town along: Lockhart.
Lot and permit questions near Bastrop
Does the City of Bastrop or Bastrop County permit my septic system?
It depends on the city limit line. Bastrop County has two on-site sewage authorized agents: the county for everywhere except the City of Bastrop, and the City of Bastrop inside its city limits. A state septic delegation to a city covers only the incorporated area, so an ETJ tract goes to the county. The county permits every system regardless of acreage, which sets aside the state ten-acre exception.
Does Bastrop County inspect my barndominium?
No. Bastrop County issues no building permit and no certificate of occupancy and inspects nothing itself. Because its Commissioners Court adopted residential building code standards by resolution on September 14, 2009, three inspections are still required: foundation, framing and mechanical, and completion. Your builder contracts them privately with one of six listed qualified persons.
Do I need a floodplain permit if my Bastrop tract is in Zone X?
Possibly. Bastrop County requires two feet of freeboard above base flood elevation and extends that to some Zone X areas where base level engineering has set flood depths, with a surveyor certifying the elevation. Check the address at the FEMA Flood Map Service Center, then ask the county Floodplain Administrator inside Development Services which permit class applies.
Can I finance a barndominium in Bastrop County?
Some lenders say so publicly. Texas Farm Credit and Capital Farm Credit both state that they finance barndominiums, and Capital Farm Credit names metal homes under its construction lending. Fannie Mae's Selling Guide recognizes single-closing construction-to-permanent financing, where the construction loan and the permanent mortgage close together.
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