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Unilock Fence Installation: The San Antonio Owner’s Guide
If you already have Unilock fence panels, posts, or caps and need them installed, repaired, or matched to an existing run, we can help. A typical Unilock fence installation in San Antonio runs $3,500 to $9,000 depending on linear footage, terrain, and whether we’re doing a fresh install or working around existing hardscape. Most owners discover they need us after a storm knocks a panel loose, a post shifts in our clay soil, or they bought Unilock product for a DIY project that turned out bigger than the weekend allowed.
We’re an independent San Antonio contractor, not a Unilock dealer or affiliate. That means we don’t mark up product on a pass-through basis. You buy the Unilock materials or we source them for you, and we give you a written installation price before any work starts. The price you sign is the price you pay. Graham Stein built Elmstead Remodeling San Antonio on that rule: write it down, price it once, do it right.
Which Unilock Models This Applies To
Unilock makes a wide range of wall and paver systems, and their fence-compatible lines vary by series. The most common we see in San Antonio yards are estate wall blocks used as fence columns, freestanding fence panels built into Unilock wall systems, and the occasional Unilock post-and-panel kit from a big-box purchase. The important compatibility check is the block or panel code stamped on the product’s underside or side face, usually a three-to-five character code like “UE,” “UL,” or a series name followed by a number.
Here’s the gotcha most San Antonio owners hit: Unilock fence components are not always cross-compatible across product generations. A 2015-era Unilock fence panel from the Brussels Block line will not seat cleanly into a 2023-era Estate Wall column without a field modification. If you bought product from two different lots or two different stores, bring both product codes to your estimate. For aftermarket parts like post caps, brackets, and clip rails, quality equivalents exist and typically cost 20-40% less than OEM, but we’ll tell you where the aftermarket holds up and where it doesn’t before you spend a dollar. In San Antonio’s full sun and occasional freeze-thaw, aftermarket plastic caps fade faster than Unilock’s OEM blended colors, but a good aftermarket galvanized bracket will outlast either.
Styles & brands we work with
Signs Your Unilock Fence Installation Is Failing
- Post lean at the base. This is the big one in San Antonio. Our heavy clay soil expands when it rains and contracts in summer drought. Posts set with quick-mix concrete in a narrow hole will eventually tilt. The fix is a wider footing, gravel drainage, and in some yards, a deeper embedment below the frost line, which here is shallower than up north but still matters with clay heave.
- Panel sag between posts. If your Unilock fence panels are aluminum or vinyl inserted into block columns, sag usually means a clip rail or bracket has failed inside the column cap. The surface looks fine. Lift the panel gently and you’ll often find a cracked plastic clip that gave out in the heat.
- Caps cracked or lifting off the column. Unilock column caps take direct sun and rain. Hairline cracks from thermal cycling let water into the block core. Over time, the water makes its way down and spalls the block face. If you see white chalky residue on the block under a cap, water is already moving through it.
- Gate won’t latch or scrapes the ground. Usually the post holding the gate has moved, not the gate hardware. San Antonio’s clay does not move posts evenly. One side shifts, the gate goes out of square, and the latch stops lining up.
- Visible gaps between wall blocks and fence panel. If the fence was retrofitted into an existing Unilock wall, expansion and contraction can open a gap. Left alone, the panel can start working against the block and chip the face.
See the difference
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After
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AfterReplacement Cost & What’s Included
For a full Unilock fence installation in San Antonio, most projects land between $3,500 and $9,000. A straight run of 50 to 80 linear feet with two gate openings sits at the lower end, assuming the ground is level and posts can go in without rock excavation. The upper end covers longer runs, sloped yards, any work around stone outcroppings (common on the north and northwest sides of the city), and matching into existing Unilock wall systems that were built years ago.
Your written price includes removal and haul-away of the failed fence if there is one, post footings dug with gravel drainage, setting, panel and gate installation, and a final check of every latch, bolt, and cap. We do not create change orders for standard extras like leveling a slight grade or trimming a cap to fit. The few times a change order is real, we tell you before the work, not after. Our workmanship is covered by the 365-Day Done Right Promise: if it’s not done right after the job is complete, we make it right.
Line-Item Price Ranges for Unilock Fence Work
- Post replacement, single post with new footing: $350 – $700
- Post cap replacement, per cap: $25 – $60
- Gate re-hang and latch alignment: $150 – $400
- Panel clip or bracket repair, per panel: $75 – $200
- Full fence installation, 50 – 80 linear feet: $3,500 – $6,500
- Full fence installation, 100+ linear feet or sloped lot: $6,500 – $9,000
DIY or Call Us?
Fence installation does not carry the same danger as high-tension springs or electrical panels, but it can go wrong in ways that cost more than calling us in the first place. If you have a single warped picket or a loose cap, that’s a reasonable weekend fix with a drill and the right fasteners. What we tell San Antonio homeowners to avoid doing themselves is digging and setting posts. Setting a post in our clay soil without the right footing width, gravel base, and embedment depth is the fastest way to re-create the exact problem that brought the fence down the first time. We’ve been called out to fix post holes dug too narrow because the old concrete looked fine from the top. The failure was underneath, where you couldn’t see it.
That said, we’ll gladly work with a homeowner who wants to handle demolition or product pickup themselves. If you want to strip the old fence and have the Unilock panels stacked and waiting, that lowers your installed price. We just ask that you let us set the footings. When you’re ready to get a written number, call (432) 233-0976.
FAQs
A properly installed Unilock fence with correct footings in San Antonio should last 20 to 30 years on the structural side. The weak points are components that face direct sun, like plastic caps and clip rails, which typically show wear in 5 to 8 years in our heat. On many fences installed before 2015, the panel clips fail before the posts or blocks show any problem at all. If your fence is otherwise square and the blocks are sound, replacing clips and caps can extend the life by a decade for a few hundred dollars. Call (432) 233-0976 and we’ll tell you what’s worth fixing and what isn’t.
A leaning post can often be re-set if it is caught before the base cracks or the block face spalls. We excavate the old footing, widen the hole, add a compacted gravel base for drainage, and re-set the post with a proper concrete collar. In San Antonio clay, this is the difference between a post that stays for decades and one that leans again in two summers. If the block itself is cracked through its core, replacement is the honest call. A quote always starts with what we can see, and we’ll tell you if anything changes once the hole is open. Estimates are free at (432) 233-0976.
Most Unilock fence installations in San Antonio run three to five working days from first digging to final latch adjustment. Post footings need time to cure before we hang panels, which is not a step you want rushed. We protect the house during the work with drop cloths anywhere we pass through and shoe covers at the door, and we’ll work around nap hours with quieter tools where you have young children. If a hard rain comes through mid-job, schedule shifts, but the written price you signed before the first shovel does not. Call (432) 233-0976 and we’ll give you a straight answer on timing for your specific yard.
We carry common Unilock-compatible caps, clip rails, brackets, and gate hardware on the truck for most standard series. For OEM Unilock panels, column blocks, and specialty caps, we source through our supplier network and tell you the actual cost before we order anything. We never add a mystery markup to product you could price yourself; the material cost is listed separately from labor on every written estimate we produce. If you already have replacement product sitting in the garage, we’ll install it at labor-only pricing. Call (432) 233-0976 and tell us what Unilock series you have, and we’ll tell you what’s on the truck today.
Written by Graham Stein, Owner, Elmstead Remodeling San Antonio at Elmstead Remodeling San Antonio, serving San Antonio and nearby areas.
