Concrete Patios and Patio Extensions in Hornsby Bend, Texas
Heritage Concrete Austin pours concrete patios and patio extensions at homes in Hornsby Bend, Texas, whether that means widening the slab off the back door or laying a new patio where the yard is still lawn. Half of the community's homes date from 2009 or later, the median year built in the Census Bureau's 2020-2024 survey estimates.
Hornsby Bend lies on Farm Road 969 and the Colorado River, nine miles east of Austin in eastern Travis County, where Reuben Hornsby settled in 1832. It is an unincorporated community with no city government, so Travis County's rules govern concrete work here; its old Hornsby-Dunlap school district was annexed to the Del Valle Independent School District in 1967. Give us the patio's rough size in the form for a free estimate.
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Patio extensions for young homes and families
The Census Bureau counted 12,168 people in Hornsby Bend in 2020. Ten years earlier, when it first appeared as a census-designated place, it had 6,791. Its 2020-2024 survey estimates count 4,573 homes, about 76% of them built in 2000 or later, 1,725 in the 2010s alone and 445 since 2020. About 96% are single-family detached houses, and owners live in roughly 73% of the occupied homes (all survey estimates, with wide margins).
The households are young, too. At the 2020 Census the median age was 30.5, and 44.2% of the 3,751 households had children under 18. On a house that already has a small slab at the back door, an extension adds room for a grill, a table or a play area without breaking out what's there.
Joining new concrete to the existing slab
Old and new concrete shouldn't be poured as one piece. The American Concrete Pavement Association's guidance for the line between old and new pavement is an isolation joint ½ to 1 inch wide, filled with a pre-formed joint filler that runs the full depth of the slab. Expect a difference in color, too: fresh concrete is hard to match against a slab that has weathered for years, which is worth deciding on before the pour, not after.
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(512) 588-2862Travis County rules for a patio in an unincorporated community
Hornsby Bend sits outside every city's limits, so Travis County Development Services handles permits. The County's stance is broad: any development requires a permit, and its definition of development includes paving and grading. Its list of single-family permits (new homes, accessory buildings, additions, remodels, driveways, retaining walls, fences, pools, septic systems and solar) has no item for a patio on its own. Ask Development Services whether a backyard slab on your lot needs a permit before the pour; nothing the County publishes says a patio is exempt.
Impervious cover review
In its environmental review of a house on a single lot, the County treats roofs, concrete driveways, patios and other improved surfaces as impervious cover. If a lot that isn't part of a subdivision adds more than 10,000 square feet of it, the application has to propose permanent water-quality controls. For stormwater design in the eastern part of the county, and anywhere in Austin's extraterritorial jurisdiction, Travis County refers applicants to the City of Austin Environmental Criteria Manual.
A patio built as part of an addition
Where a patio is poured as part of an addition to the house, the County's addition permit brings inspections with it. When a professional builder does that work, a licensed third-party inspector has to inspect at least three times, the first at the foundation stage before any concrete goes in. A County permit also has to go up on the site, somewhere visible from the street right-of-way, before work starts.
Floodplain near the river
Floodplain authority in Travis County covers only the unincorporated areas, Hornsby Bend among them, and the County's floodplain and development-permit standards apply here. With the Colorado River along the community, check whether your lot is mapped in the floodplain before you settle on the size and spot for a patio.
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(512) 588-2862Pouring a patio through an Austin-area summer
The hot season is long. At Camp Mabry, the National Weather Service's official Austin station, normal highs climb to 90°F by May 26 and hold above 90 until September 23, and the 1991-2020 normals average 122.8 days of 90-degree heat or worse each year. In 2023 the Austin area went 45 days straight at 100°F or more, from July 8 to August 21.
What heat does to fresh concrete
Hot weather changes the pour. The American Concrete Institute caps concrete in its hot-weather specification at 95°F at the moment of discharge from the truck. The National Ready Mixed Concrete Association's hot-weather guidance goes further. Chilled mixing water can bring a batch's temperature down by as much as 10°F, and ice by as much as 20°F; a truckload more than 1½ hours old shouldn't get extra water, and when it's hot, curing runs no less than 3 days.
The best curing window
Concrete cures best when the air sits between 50°F and 80°F. A summer pour can still turn out well, as long as the mix stays within the temperature limit and curing begins the moment finishing is done.
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(512) 588-2862A community called the oldest settlement in Travis County
Reuben Hornsby, a surveyor by trade, surveyed his own land grant east of the Colorado River, thirty miles north of Bastrop, moved onto it in July 1832 and received title on March 4, 1841. The Handbook of Texas says the community named for him, also known as Hornsby or Hornsby's, has been called the oldest settlement in Travis County, and that he was its postmaster during the Republic of Texas era. He died on January 11, 1879, and lies in the family cemetery at Hornsby Bend. His great-grandson, Baseball Hall of Famer Rogers Hornsby, is buried in Hornsby Bend as well.
The post office opened in 1856, closed during the Civil War, reopened in 1886 and shut for good in 1901, after which Hornsby Bend's mail went to Austin. The community had two general stores in 1892, and the Handbook reports a population of ten in the 1930s and 1940s and twenty from the 1950s through 2000. In 1905 its schools joined Dunlap's to form the Hornsby-Dunlap common school district.
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(512) 588-2862Concrete patio costs around Hornsby Bend
Price guides don't publish figures for Hornsby Bend itself, so the closest are typical Austin-area numbers. For 2026 those put a patio 3½ to 4 inches thick at around $10 per square foot, with rebar at $1.40 to $1.85 for two feet of material. A September 2026 Austin-area figure for a basic 120-square-foot patio is $9.54 to $11.71 per square foot, under the same source's national $10.59 to $12.99. Nationally, rebar or wire mesh reinforcement adds $1 to $3 per square foot (2026).
Every figure here is a published average, not a price from us. What your patio costs depends on its size, the finish and the ground in your yard; pricing it costs you nothing.
- 100 sq ft, about a 10 by 10
- $400–$1,000
- 144 sq ft, about a 12 by 12
- $580–$1,440
- 225 sq ft, about a 15 by 15
- $900–$2,250
- 320 sq ft, about a 16 by 20
- $1,280–$3,200
Austin-area averages by patio size, 2026. Not a quote.
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(512) 588-2862Other concrete work near Hornsby Bend
Besides patios and extensions, we pour steps down from a back door, walkways out to the patio, stamped and stained finishes, pads for sheds and hot tubs, new driveways, and repair, leveling and resurfacing for older slabs. Along the same east-county roads, Heritage Concrete Austin puts in concrete driveways in Garfield on State Highway 71 and concrete pads in Webberville, farther east on Farm Road 969.
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(512) 588-2862How a patio extension job runs
These steps are general practice; the yard, the old slab and the County's answer decide the details.
Free estimate at the house
The estimate covers the existing slab, the area to be added, which way water runs off the yard, and anything in the way, such as downspouts or sprinkler lines.
Check with Travis County
Ask Development Services whether the slab needs a permit and whether the lot is in a mapped floodplain. A patio that is part of an addition goes under the addition permit and its inspections.
Forms and the joint at the old slab
Forms are set to the new outline, and a full-depth isolation joint separates the new pour from the existing patio, as the American Concrete Pavement Association recommends.
Pour, finish and cure
Exterior patios get a broom texture for grip. NRMCA tells finishers not to sprinkle water or cement on the slab to ease finishing, and curing starts as soon as finishing ends.
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(512) 588-2862Patio questions from Hornsby Bend
What does a 20-by-20 concrete patio cost near Hornsby Bend?
A 20-by-20 patio covers 400 square feet. Typical Austin-area figures for 2026 put one that size at $1,600 to $4,000, and national 2026 figures give $1,600 to $4,800 for a basic patio of the same dimensions. Stained or stamped finishes cost more per square foot.
Does a patio in Hornsby Bend need a permit?
Travis County decides, not a city, because Hornsby Bend is unincorporated. The County says any development needs a permit and counts paving as development, but its residential permit list has no patio item, so the answer for a plain backyard slab has to come from Development Services. A patio built as part of an addition falls under the addition permit, with a third-party inspection at the foundation stage before concrete is placed.
Get a free estimate on a Hornsby Bend patio
Phone us or use the form to say how big the patio should be and whether it adds onto an existing slab. Heritage Concrete Austin gives no-charge estimates for new patios and extensions in Hornsby Bend and across eastern Travis County, 24/7.