Galveston County 2021 IRC as adopted here TDI windstorm area

Barndominium Builders in League City, TX

League City is the clean case on the Texas coast. It sits in Galveston County, one of the fourteen counties wholly inside the windstorm catastrophe area the Texas Department of Insurance designates, so there is no line to be on the right side of, as there is in Pasadena or Pearland. That one fact runs through the job. The city enforces the 2021 International Residential Code, but its own ordinance holds the permit until an engineer registered with TDI has produced windstorm design documentation, and holds the final inspection until the WPI-8 certificate is on file. Add section 22-14, which requires every foundation and framing plan over 250 square feet to be sealed by a Texas structural engineer, and a League City barndominium is an engineered building from the first sketch. There is still open land here, nearly 4,000 acres on the west side, but the zoning stops at half-acre lots.

League City at a glance

County: Galveston County
Population: 119,905
Where we build: League City, Pasadena, Pearland, Houston
Site visits: We meet you on the parcel, anywhere in League City or Galveston County

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Building conditions in League City

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 League City, drawn from the sourced facts on this page. Every figure above is cited in the quick-facts panel below, with its source and vintage.

A whole designated county, so there is no boundary test

Galveston County is one of fourteen Texas counties that sit wholly inside the windstorm catastrophe area designated by the Commissioner of Insurance. TDI puts it plainly: except for Harris County, the entire county of each of the counties on its map is part of the windstorm program. The question that decides a Pasadena or a Pearland project - which side of a line the parcel sits on - does not arise for the Galveston County side of League City.

Texas Department of Insurance, Adopted Building Codes (tdi.texas.gov/wind/adopted-codes.html, page dated 23 April 2026); Texas Insurance Code sec. 2210.003, first tier coastal counties

The city holds the permit until TDI's engineer has signed off

Code of Ordinances section 22-35 requires the building official to be given design documentation from a state licensed engineer registered with TDI to perform windstorm inspections, for construction, renovation or modification of any structure over 250 square feet inside the city limits, before the permit is released - and a TDI report certifying compliance with the current TWIA plan of operation at completion. The city's own single-family checklist goes further: the WPI-8 is one of the final documents that must be approved before final building and MEP inspections can even be scheduled.

League City Code of Ordinances sec. 22-35, Windstorm and hurricane protection; City of League City, New Single Family Construction permit page (leaguecitytx.gov/791/Residential)

Every foundation and framing plan here is engineer-sealed

Section 22-14 requires all foundation and framing plans for structures over 250 total square feet to be designed and sealed by a structural engineer licensed in Texas. State law reaches the same place from a different direction: Occupations Code section 1001.056(c)(1) removes the private-dwelling exemption from the Engineering Practice Act for anyone providing engineering design or inspection services needed to comply with windstorm certification standards. Everywhere else in Texas an ordinary house needs no engineer at all.

League City Code of Ordinances sec. 22-14, General design requirements; Texas Occupations Code sec. 1001.056(c)(1)

Two code editions apply to the same building

The city adopted the 2021 International Residential Code by Ord. No. 2022-06. The windstorm certificate is measured against a different edition: TDI's rule at 28 TAC section 5.4013 requires WPI-1 applications for work begun on or after 1 April 2026 to be certified to the 2024 International Residential Code or the 2024 International Building Code. That is the newest residential code in force anywhere in Texas, and it is not a stricter code than the IRC - it is the IRC, three years newer than the city's own edition.

League City Code of Ordinances sec. 22-15; 28 Texas Administrative Code sec. 5.4013; TDI, Adopted Building Codes

What the certificate is worth, and it binds the insurer

Insurance Code section 2210.258(b) says the association may not insure a structure in the catastrophe area until a certificate of compliance has been issued for it. Section 2210.251(g) makes the certificate evidence of insurability. TWIA's own wording is that without one, TWIA lacks evidence that the structure conforms to applicable building codes and it may be considered uninsurable and ineligible for coverage with TWIA. Section 2210.258(d) allows a policy of no more than 30 days on an inspection verification while the certificate is processed. TDI says expressly that windstorm insurance is not required by law in Texas - but that a coastal lender will likely require it.

Texas Insurance Code secs. 2210.258(b), 2210.258(d) and 2210.251(g); TWIA, Windstorm Certification; TDI, What is windstorm insurance

The certificate chain, and the two deadlines on it

A WPI-1 application, TDI form PC350, goes in first. The inspector then files a WPI-2 inspection verification - form WPI-2-BC-8, TDI form PC439, for work begun on or after 1 April 2026 - and TDI issues the WPI-8 certificate. Insurance Code section 2210.2515(b) requires that notice before construction begins, and section 2210.2515(e) bars TDI from issuing the certificate if the completed forms and all inspection fees have not reached it within six months of the final inspection. The completed-construction route, WPI-2E on form PC434 leading to a WPI-8-E, is open only to a Texas licensed professional engineer, and TDI says it may cost more because a finished structure is harder to inspect.

TDI, Windstorm forms listing (tdi.texas.gov/forms/form13windstorm.html); Texas Insurance Code sec. 2210.2515(b), (c) and (e); TDI, What you need to know about windstorm inspections

Also worth knowing before you build in League City

97.8 percent of the city is on the Galveston County side: The Census Bureau's 2025 population estimates put League City at 119,905 people, of whom 117,255 live in the Galveston County part of the city and 2,650 in the Harris County part north of Clear Creek. Galveston County is wholly in the windstorm catastrophe area. The Harris County sliver is not: TDI's Harris County rule reaches only structures east of State Highway 146 that are also inside Seabrook, La Porte, Shoreacres, Pasadena or Morgan's Point, and League City is not on that list.
There is land here, but the zoning stops at half an acre: League City is not built out. The Westside Master Plan adopted in May 2025 covers nearly 4,000 acres on the southwest side of the city, west of Hobbs Road and north of FM 517, and in June 2025 the city annexed about 211 more acres by owner request, roughly 131 along NASA Road One and 80 along FM 517. What the zoning does not offer is rural lot sizes: the largest single-family district, RSF-20, has a 20,000 square foot minimum and a 120-foot minimum width, and the UDC describes single-family lots as ranging from 2,000 to 20,000 square feet. For true acreage the land is west and south of the city, in unincorporated Galveston County - which is still wholly inside the windstorm area.
The flood rule is stricter than the federal minimum: Code of Ordinances section 50-81(13) requires the lowest floor and all attendant utilities of new and substantially improved construction, in areas of special flood hazard and in the 0.2 percent annual chance floodplain alike, to be elevated at least 24 inches above the base flood elevation and at least three inches above the nearest 500-year flood elevation. Fill that reduces floodplain storage must be compensated for elsewhere in the same floodplain. A form survey and a FEMA elevation certificate are required to prove the elevation, and the elevation certificate is on the single-family submittal checklist.
Published permit and registration fees: The city's building department fee schedule effective 1 August 2026 charges a new single-family building permit at $0.42 per square foot with a $0.21 per square foot plan review, a $0.16 per square foot repeat plan review, and a $150 minimum permit fee. Contractor registration and annual renewal is $150; the city requires a copy of the state trade licence where applicable and proof of insurance naming the City of League City as certificate holder. Re-inspections cost $100, then $300 for a second failure of the same item and $500 thereafter.
The windstorm inspectors are fifteen miles down the freeway: TDI runs its windstorm program from four field offices on the Texas coast. The one covering Galveston and Harris counties is in La Marque, reachable on 800-248-6032, option 4 then option 2. During construction the inspection can be done by an engineer appointed by TDI or by a TDI inspector; only a Texas licensed professional engineer can certify a completed structure.
Local amendments a metal building has to answer for: Section 22-35 also sets specific hurricane requirements inside the city limits: masonry wall ties of galvanized or electroplated material at 16 inches on centre both ways, asphalt shingles complying with ASTM D 3161 Class F, all outdoor mechanical equipment and building components anchored against overturning, uplift and sliding in a design wind event, and glazing that is impact-resistant or protected by an impact-resistant covering meeting ASTM E 1996 or ASTM E 1886. Section 22-16 separately bars wood shingles and wood shakes as roofing on new residential structures.

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 League City

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 Galveston 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.

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What a build looks like

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

Stage one

The parcel

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

Stage two

Pad and permit

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

Stage three

Frame to finish

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

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

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Where we build around League City

Galveston 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 League City service area, covering Galveston 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 League City allows.

Barndominium Cost Guide

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

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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.

Pasadena

Harris County

Pearland

Brazoria County

Houston

Harris County

Building in League City: common questions

7 questions we get asked most often about building in League City. If yours is not on the list, ask it directly.

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Is all of League City in the windstorm area?

Very nearly. League City is in Galveston County, and Galveston County is one of the fourteen Texas counties that lie wholly inside the catastrophe area designated by the Commissioner of Insurance - TDI's rule is that except for Harris County, the entire county of each county on its map is in the windstorm program. A small part of the city extends north of Clear Creek into Harris County, about 2,650 of the city's 119,905 residents on the Census Bureau's 2025 estimates, and that part is outside the program: TDI's Harris County rule reaches only structures east of State Highway 146 inside Seabrook, La Porte, Shoreacres, Pasadena or Morgan's Point.

Does a barndominium in League City need an engineer?

Yes, on two separate grounds. City ordinance section 22-14 requires foundation and framing plans for any structure over 250 square feet to be sealed by a Texas licensed structural engineer, and section 22-35 requires design documentation from an engineer registered with TDI to perform windstorm inspections before the permit is released. Separately, Occupations Code section 1001.056(c)(1) removes the private-dwelling exemption from the Engineering Practice Act for engineering design or inspection services needed to meet windstorm certification standards. The city's single-family checklist calls the submittal an engineering package: framing plans, foundation plans and windstorm plans together.

Which code edition applies in League City?

The city enforces the 2021 International Residential Code, adopted by Ord. No. 2022-06 at Code section 22-15, with local amendments at section 22-16. The windstorm certificate runs on a separate track: TDI's rule at 28 TAC section 5.4013 requires WPI-1 applications for work begun on or after 1 April 2026 to be certified to the 2024 International Residential Code or the 2024 International Building Code. Both apply to the same building - the city's ordinance requires the TDI report as a condition of its own permit.

What is the design wind speed in League City?

There is no single published figure to quote, and any that is quoted at you should be checked. TDI's current position is that the required wind speed must be determined for each structure based on the location of that structure, using tools such as the ASCE 7 hazard tool, and that most of the designated catastrophe areas now sit inside the windborne debris region, so opening protection is a design question rather than an upgrade. League City's own guidance asks that plans state the ultimate design wind speed and comply with the city's adopted codes in addition to TDI requirements.

Can I insure the building without the certificate?

Not through TWIA. Insurance Code section 2210.258(b) prohibits the association from insuring a structure in the catastrophe area until a certificate of compliance has been issued for it. Section 2210.258(d) allows a bridge policy of no more than 30 days on an inspection verification form while the certificate is processed. TWIA's own wording is that without a certificate a structure may be considered uninsurable and ineligible for coverage with TWIA. TDI is clear that windstorm insurance is not required by law in Texas, but a lender on the coast will likely require it.

When does the paperwork have to start?

Before anyone breaks ground. Insurance Code section 2210.2515(b) requires written notice to the department of the intent to construct on a form TDI prescribes - the WPI-1 - before the person begins to construct. There is a deadline at the other end too: section 2210.2515(e) bars TDI from issuing the certificate if the completed forms and all inspection fees have not reached it within six months of the final inspection. And in League City the WPI-8 is one of the documents that must be approved before final building and MEP inspections can be scheduled at all.

Is there anywhere in League City to put a barndominium on acreage?

Inside the city limits, not really at rural sizes. The zoning has no agricultural or rural district; the largest single-family district, RSF-20, sets a 20,000 square foot minimum lot and a 120-foot minimum width, and it is the only residential district where crop and animal raising is a permitted use. The city is not built out - the Westside Master Plan covers nearly 4,000 acres west of Hobbs Road and north of FM 517, and the city annexed roughly 211 more acres in June 2025 - but that land is being planned for platted subdivisions. Real acreage is west and south in unincorporated Galveston County, where the city's building code does not reach but the windstorm certificate still does, because the whole county is in the catastrophe area.

Building in League City?

Start with the plan. Tell us what you want to build and we will draw it, then confirm what Galveston 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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