Flat Texas Gulf coastal prairie with brackish sloughs, cordgrass, and wind-shaped live oaks leaning inland.
Hardin County No county building code

Barndominium Builders in Hardin County, TX

Hardin County is where the coastal regime stops. Its whole southern line is the Jefferson County line, and Beaumont is inside the Texas Department of Insurance windstorm programme, so a build twenty-five miles down US 69 has to meet the 2024 code and carry a certificate of compliance simply to be insurable against wind and hail. Kountze, Silsbee, Lumberton and the pine and bottomland north of that line are outside it. Insurance Code section 2210.003 names Hardin a second tier coastal county, and second tier is not designation: the commissioner has never designated it, so no windstorm certificate is required here and none can be issued. The other surprise is the septic. Hardin is one of a handful of Texas counties with no authorised agent at all, so the on-site sewage facility permit comes from the state, out of the Beaumont regional office, under the plain state rules with nothing added.

Hardin County at a glance

County
Hardin County
Population
58,723
Where we build
Kountze, Beaumont, Jefferson County, Liberty County

ZIPs 77625, 77657, 77656, 77659, 77585, 77663, 77374, 77519 and more

Site visits
We meet you on the tract, Kountze or anywhere else in Hardin County
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Building conditions in Hardin County

What actually changes from one Texas jurisdiction to the next: who issues the permit, whether the residential code is enforced there at all, what the structure has to be engineered to, and what the ground is like. These are the numbers your drawings have to satisfy.

Build conditions for Hardin County , Texas . BUILD CONDITIONS HARDIN COUNTY, TXHardin CountyNO COUNTY BUILDING…ADOPTED RESIDENTIAL CODENO COUNTY BUILDING…This jurisdiction publishes no design wind speed. It is settled in writing with the authority overyour parcel before the frame is ordered.ZONING · NO COUNTY ZONINGOne acre on a private well, half an…A Texas commissioners court has no zoning power. What does bindunincorporated land here is the county's own subdivision manual,…COUNTY RESIDENTIAL DEVELOPMENT PERMIT$100.00That covers the first 1,000 square feet, with 25 dollars for eachadditional 100 square feet. The application measures total living…WHO ISSUES THE PERMITHardin County Floodplain Administrat…Permit office at 225 Crocker Street, Kountze, TX 77625, mailingaddress 300 W Monroe Street, (409) 246-5250 or (409) 246-5251. The…
Build conditions for Hardin County, drawn from the sourced facts on this page. Every figure above is cited in the quick-facts panel below, with its source and vintage.
Outside the windstorm catastrophe area
TDI's designated catastrophe area is fourteen whole counties plus part of Harris County, and Hardin is not among them, so the 2024 code condition TDI attaches to catastrophe insurance does not reach a building here and no windstorm certificate of compliance is required or available

Texas Department of Insurance, designated catastrophe area county maps index and Adopted Building Codes page, tdi.texas.gov/wind/adopted-codes.html, read 1 September 2026

Second tier is not designation
Insurance Code section 2210.003 lists Hardin as a second tier coastal county and Jefferson as a first tier county, and section 2210.005 leaves designation to the discretion of the Commissioner of Insurance, who has never designated Hardin

Texas Insurance Code sections 2210.003 and 2210.005, read from the rendered chapter text 1 September 2026

The septic permit comes from the state
TCEQ's authorised agent search returns a single record for Hardin County, TCEQ Region 10 in Beaumont, whose own area served reads Hardin, Jasper, Newton, Sabine and Shelby counties. Jefferson and Orange counties next door each run their own programme

TCEQ OARS authorised agent search by county and Region 10 contact record, tceq.texas.gov/permitting/ossf/aa_search.html

The permit fee is measured on living area only
The county's residential development permit application has one size field and it reads total square feet, total living area only. The fee is 100 dollars for the first 1,000 square feet plus 25 dollars per additional 100

Hardin County Development Residential Permit Application, revised 12 September 2024, and the county permit and fee schedule updated 21 June 2024

The power connection is gated by a permit
A 30 dollar county electrical service permit must be obtained before any type of service will be provided by Entergy or SHECO, and it names the meter loop, meter base and temporary pole among its permit types

Hardin County Electrical Service Permit Application, revised 12 September 2024, and the county permit and fee schedule

Nearly half the county is poorly drained
268,600 of the county's 575,002 mapped acres, 46.7 percent, carry a drainage class of poorly or very poorly drained, and the single largest map unit, the 97,556 acre Sorter-Dallardsville complex, records a water table at the ground surface from November through May

USDA NRCS Soil Data Access, SSURGO survey area TX199, drainage class and soil moisture queries run 1 September 2026

Also worth knowing before you build in Hardin County

An exempt well still has to be registered
Hardin County is inside the Southeast Texas Groundwater Conservation District, whose Rule 3.5 requires exempted wells to be registered with the district before drilling, even where the well is exempt from permitting under Water Code section 36.117

Southeast Texas Groundwater Conservation District Rules 3.1 and 3.5, attached to the district management plan approved 3 May 2022

The shop bay does not enlarge the drainfield
With no authorised agent, there is no local instrument that could adopt a stricter definition, so chapter 285 applies here as written and capacity keys off living area, not total footprint

30 Texas Administrative Code section 285.10 and Health and Safety Code section 366.051(b), with the TCEQ authorised agent search result for Hardin County

There is no percolation test in Texas
Soil is classified by texture class, Ia sandy and gravelly down to IV silty clay and clay, with loading rates running from above 0.50 to 0.10 gallons per square foot per day

30 Texas Administrative Code chapter 285, on-site sewage facility soil classification and loading rates

Twelve inches above the base flood elevation
New residential construction in a special flood hazard area must have its lowest floor elevated to or above the base flood elevation plus a 12 inch freeboard, with a certification from a registered professional engineer, architect or land surveyor

Hardin County Floodplain Order, Article 5 Section B(1), revised order effective August 2022

The order names one Water Code section
The county's flood damage prevention order opens by reciting that the legislature delegated the responsibility to adopt these regulations in Texas Water Code section 16.315, and it applies to all areas within the jurisdiction of Hardin County, not only to special flood hazard areas

Hardin County Floodplain Order, Article I Section A and Article 3 Section A

The growth is landing outside the towns
The county added 2,366 residents between 2020 and 2025, and 1,933 of them, 81.7 percent, went to land outside every city limit, while Silsbee lost 4.3 percent of its population

U.S. Census Bureau Vintage 2025 estimates, co-est2025-alldata.csv and sub-est2025.csv

863 square miles of unincorporated land
Hardin County has 890.6 square miles of land and its five incorporated places cover 27.7 of them, leaving 96.9 percent of the county outside any city, at about 39 people per square mile

U.S. Census Bureau 2025 Gazetteer county and place files, with Vintage 2025 population estimates

Three regimes inside one county
Lumberton adopted the 2015 International Residential Code, Silsbee the 2018 edition, and the unincorporated 96.9 percent of the county's land falls under neither

Lumberton Code of Ordinances section 6-1 (Ord. No. 19-1239, 12 August 2019) and Silsbee Code of Ordinances section 8-19 (Ord. No. 21-15, 20 December 2021)

A county fire code cannot reach a house
Where a Texas county adopts a fire code, the statute limits it to commercial establishments, public buildings and multifamily dwellings of four or more units in the unincorporated area

Texas Local Government Code section 233.062(a), read from the rendered chapter text 1 September 2026

Ten acres skips the plat, and the address with it
A division where every lot exceeds 10 acres is exempt from platting, and the subdivision manual assigns street addresses through the plat, so an exempt tract gets its 911 address from the South East Texas Regional Planning Commission instead

Hardin County Subdivision Manual, June 2024 revised April 2026, Article 3 and Appendix C8, with the county permit page addressing note

Clay on an eighth of the county
76,037 acres, 13.2 percent of the county, carry smectitic mineralogy. Vamont clay reads 56.5 percent clay at the surface with a linear extensibility of 9.2 rising to 11.1 with depth

USDA NRCS Soil Data Access, SSURGO survey area TX199, component and horizon queries run 1 September 2026

Climate zone 2A
Hardin County is climate zone 2A, hot-humid, on both the pre-2021 and the 2021 IECC and IRC county maps, so the energy zone does not shift with the edition here

Pacific Northwest National Laboratory PNNL-33270, county climate zone data files

A licensed plumber is required even without a code
The rural plumbing exemption expressly excludes plumbing performed in conjunction with new construction

Texas Occupations Code section 1301.052

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Below the slab

The expensive surprises are in the ground, not the building

What moves a Texas budget is usually below grade, and it is soil rather than rock: shrink-swell clay. The Blackland Prairie and the Gulf Coast clays move enough between a wet season and a dry one to drive the foundation design across the state's largest markets, which is why several DFW cities require an engineer's seal on the foundation of every new house. Those are the same conditions that decide whether a septic field passes its soil and site evaluation, so the grading plan, the foundation and the drainfield get resolved together rather than one at a time. We price the dirt before we price the building.

What we build in Hardin County

All nine of our services — kits, custom plans, post-frame and steel construction, site preparation, permitting and engineering, through to turnkey builds — are available across Hardin County. What a project costs depends far more on the parcel than on square footage, so we work from your land rather than from a rate card.

See what we build

What a build looks like

Three stages every Hardin County project passes through, from a raw parcel to a finished home. Site work first, because that is where the budget is decided.

Aerial view of an undeveloped rural lot with cleared grass, a live oak and cedar elm treeline, and a pale gravel access track.
Stage one

The parcel

Zoning, setbacks, flood zone and utility access get checked before anything is drawn.

An excavator grading a compacted building pad on a cleared lot, with survey stakes and a drainage swale visible.
Stage two

Pad and permit

Clearing, grading and a compacted pad, while the submittal works through Hardin County.

A finished barndominium at dusk with warm interior lighting glowing through its large windows.
Stage three

Frame to finish

Shell erected and dried in, then systems, insulation and interior finish through to CO.

Those are the rules for Hardin County. Tell us what you want to build and we will draw it to them.

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Where we build around Hardin County

Hardin County and the rural land around it. The buildable acreage for a project this size usually sits outside the city limits, which is frequently what changes who issues your permit.

Our Hardin County service area, covering Hardin County and the surrounding rural acreage. This map marks the territory we serve, not a branch location.

Keep reading

The questions that usually come next once you know what Hardin County allows.

Barndominium Cost Guide

Sourced per-square-foot ranges by tier and by size, with a calculator built on the same figures.

Read it

Is It Legal in Texas?

Classification, zoning, the HOA gate, and why "nonresidential farm building" does not cover a home.

Read it

How Long Does It Take?

Census build-duration data, and what actually sets the permit clock where you are building.

Read it

Nearby areas we build in

Others we cover in this part of Texas. The permitting authority, the adopted design criteria and the zoning can all differ from one to the next.

Beaumont

Jefferson County
Jefferson County

Jefferson County
Liberty County

Liberty County

Building in Hardin County: common questions

12 questions we get asked most often about building in Hardin County. If yours is not on the list, ask it directly.

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Do I need a windstorm certificate to build in Hardin County?
No. The Texas Department of Insurance windstorm programme covers a designated catastrophe area of fourteen whole counties plus part of Harris County, and Hardin is not one of them. Insurance Code section 2210.003 does name Hardin a second tier coastal county, which catches people out, but the second tier is only the pool from which the Commissioner of Insurance may designate a catastrophe area under section 2210.005, and Hardin has never been designated. So there is no WPI-1 to file before you start, no inspection verification during the build and no WPI-8 at the end. Jefferson County, which forms the whole southern boundary of Hardin, is inside the programme. Beaumont is inside it. Kountze, twenty-five miles up US 69, is not.
Then does the 2024 code apply to a barndominium here?
No, and it is worth being exact about what that rule does. From 1 April 2026 the Texas Department of Insurance requires that, to be eligible for catastrophe property insurance, a structure located in the designated catastrophe area comply with the 2024 International Residential Code or International Building Code. That is a condition of insurability, not a replacement for whatever code the city or county has adopted, and inside the area both apply at once. Hardin County is outside the area, so the condition simply never attaches. What code applies to your build here is a purely local question: Lumberton has adopted the 2015 International Residential Code, Silsbee the 2018 edition, and the 96.9 percent of the county's land outside every city limit falls under neither. The commissioners court has never adopted a residential code order for the unincorporated area. It came closest in April 2024, when the County Judge posted notice that the court would consider one and attached a draft; that draft stayed unsigned, the item was posted for discussion only, and it has not returned to an agenda since. The permit office on (409) 246-5251 is the place to settle it for your parcel.
Who issues the septic permit in Hardin County?
The state does. TCEQ's authorised agent search returns exactly one record for Hardin County, and it is TCEQ Region 10 in Beaumont. There is no county authorised agent, no city agent and no health district holding a delegated programme. The region's own record lists its area served as Hardin, Jasper, Newton, Sabine and Shelby counties. That is unusual in this corner of Texas, because both neighbours run their own: Jefferson County and Orange County are each the authorised agent for their unincorporated areas. In practice it means your on-site sewage facility application goes to 3870 Eastex Freeway in Beaumont, (409) 898-3838, and not to the courthouse in Kountze.
Does my shop space count towards the size of the septic system?
Not here. TCEQ's application form asks for the number of bedrooms and the living area in square feet, and the wastewater usage table is headed number of bedrooms or living area of home. Both tests apply and the higher one governs, but the area figure is living area, not total structure area. In many Texas counties the next question is whether the local authorised agent has adopted something stricter, because 30 TAC section 285.10 lets an agent do exactly that with written justification and TCEQ approval. Hardin County has no authorised agent, so there is no local instrument in which a stricter definition could live. Chapter 285 applies as written and the shop bay does not enlarge the drainfield.
What permits does Hardin County actually require?
More than most people expect, all of them from the Floodplain Administration. A residential development permit is required before any man-made change to real estate begins, at 100 dollars for the first 1,000 square feet of living area plus 25 dollars for each additional 100. A 30 dollar electrical service permit must be in hand before Entergy or SHECO will connect power. Culverts are 50 dollars each and the county installs them, the first one at no charge. There are separate permits for manufactured home placement, solar panels, landscape culverts, subdivisions and commercial or industrial development. What none of them includes is a code edition, a plan review or a structural inspection. The permit conditions are about when work may start, when the permit expires and access for the local administrator to verify compliance with the flood order.
Is the ground in Hardin County a problem to build on?
The problem here is water before it is anything else. Of the 575,002 acres the NRCS maps in the county, 268,600 carry a drainage class of poorly or very poorly drained, which is 46.7 percent, and the two highest-runoff hydrologic soil groups together account for 63.4 percent. The single biggest map unit in the county, the Sorter-Dallardsville complex at 97,556 acres, records a seasonal water table at the ground surface from November through May. About 11 percent of the county sits in map units the NRCS names as flooded. There is expansive clay too, on roughly an eighth of the county, and Vamont clay reads 56.5 percent clay right at the surface. Which of those two problems you have is a question about your parcel, not about the county.
Can I trust what the topsoil looks like?
Not on its own, and this is worth digging for. Several of the county's common series read sandy in the plough layer and much heavier below. Otanya very fine sandy loam is 3.6 percent clay and 71.8 percent sand at the surface, and 33 percent clay at 64 to 122 centimetres. Kirbyville fine sandy loam runs 6.5 percent clay at the top and 25.5 percent in the subsoil. Sorter, the county's most widespread soil, is only about 2.5 percent clay at the surface and is still poorly drained. Texas classifies soil for septic purposes by texture rather than by a drainage test, so the site evaluation is what settles both the drainfield and how the foundation is approached, and it should be done before the footprint is fixed.
Do I need a permit for a water well?
You need a registration, and it has to happen first. Hardin County is inside the Southeast Texas Groundwater Conservation District, whose boundaries are coextensive with Jasper, Newton, Hardin and Tyler counties. The district's Rule 3.1 says no person shall drill, modify, complete, plug or alter the size of a well within the district without first registering it, even though the well may be exempt from the requirement of a permit under Water Code section 36.117, and Rule 3.5 puts it plainly: exempted wells shall be registered with the district before drilling. A domestic well below 25,000 gallons a day still needs no operating permit, but the paperwork is not optional. The district is at (409) 383-1577.
Does my land have to be platted?
Not always, and the exemption has a consequence people miss. The county's subdivision manual reproduces the exceptions in Local Government Code section 232.0015: land used primarily for agriculture, farm, ranch, wildlife management or timber production, transfers to relatives within the third degree, and divisions in which every lot is more than 10 acres. A division into four or fewer parts, each at least one net acre with 60 feet of road frontage, can go through as a minor plat. The catch is that the manual assigns street addresses through the plat, with the 911 network signing off at that stage. Skip the plat and you skip the address, and the county's own permit application asks for the construction site physical address. The South East Texas Regional Planning Commission issues 911 addresses on (409) 347-1911.
Are there setbacks on unincorporated land here?
Yes, and they surprise people who have read that Texas counties cannot zone. That much is true, but the county's subdivision manual applies to all unincorporated areas and sets building lines of its own: 50 feet from the right-of-way edge on all state and federal roadways and county thoroughfares, 25 feet on other public roads, and a minimum of 20 feet between any structure and a structure on adjacent property. If your land falls inside a city's extraterritorial jurisdiction the manual says the municipal requirements prevail where they conflict, and the more stringent standard governs. The manual also requires a development review committee meeting at the start of any new subdivision or development, attended by engineering, the fire code official for the area, the utility district and the permit office.
What if I rent the barndominium out?
Ask before you assume the answer is the same. Some Texas counties route rental and income-producing residential through a commercial track where a fire code genuinely is enforced, and the fee basis changes with it. Hardin County does run a separate commercial and industrial development permit, priced on project cost rather than square footage, but nothing it publishes says a let dwelling goes there, and its own capability assessment records no county fire code and no building code official. There is also a statutory ceiling worth knowing: Local Government Code section 233.062(a) limits any county fire code to commercial establishments, public buildings and multifamily dwellings of four or more units, so a county fire code cannot reach a single family house whether you live in it or let it. If a rental is the plan, put the question to the permit office on (409) 246-5251 before the slab is poured.
I have more than ten acres. Am I exempt from the septic rules?
No, and TCEQ said so itself. When it amended the rule in 2023 the agency explained that the old wording had been misinterpreted by homeowners, installers, authorised agents and other stakeholders as meaning that single-family dwellings on ten acres or more were exempt from the entirety of chapter 285. Ten acres buys you out of the paperwork and the inspection, not out of the standards the system still has to meet. On land as wet as much of Hardin County that distinction matters, because the standards are what keep a drainfield working on a soil with a seasonal water table near the surface.

Building in Hardin County?

Start with the plan. Tell us what you want to build and we will draw it, then confirm what Hardin County will actually let you put on the parcel and what wind load it has to meet. That conversation costs nothing.

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