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Tremron Home Additions & ADU: The Austin Owner’s Guide
If you’re planning a home addition or ADU in Austin and want Tremron pavers or wall block worked into the design, a full addition or accessory dwelling unit typically runs $45,000 – $130,000 installed, with ADU construction landing between $90,000 – $220,000 depending on size, foundation work, and finishes. We handle the framing, foundation, site prep, and the Tremron paver and retaining wall details that most GCs treat as an afterthought. The telltale sign we see on existing structures: Tremron pavers settling unevenly against a slab edge, wall block leaning outward, or drainage that sends water toward the addition instead of away from it. That’s usually when a homeowner realizes the hardscape wasn’t built to hold up against Austin’s clay soil and flash-flood rain cycles.
We’re an independent contractor, and we’re not affiliated with Tremron. We do, however, specify their block and pavers on a regular basis because the product holds up in Central Texas when the base and drainage are done right. Luca Romano has been reading plans and calling out exactly those failure points before demo starts since he first picked up a hammer at Los Angeles Trade-Technical College, and his crew has been working Austin jobs for years, from Bouldin Creek to the east side.
Which Tremron Models This Applies To
Tremron manufactures wall block and pavers across several product lines, and the right choice depends on what the addition or ADU is actually doing structurally. Their retaining wall block series generally splits into two groups: the smaller, setback-style block for garden walls under three feet, and the larger, heavier block engineered for load-bearing walls that hold back soil against a foundation. If you’re building an ADU on a sloped lot in Northwest Austin or near the Barton Creek greenbelt, you’re almost certainly looking at the heavier block, and that changes the base spec, the drainage plan, and the labor.
Here’s the compatibility gotcha most people miss: the paver thickness matters more than the color or pattern. Driveway-rated Tremron pavers run thicker than patio pavers, and if you pour a foundation apron next to a paver patio and the pavers sit at the wrong elevation, you get a trip hazard at the door within two seasons. We measure the existing hardscape, verify the product number stamped on the bottom of the paver if it’s still legible, and match thickness and color before we ever cut a check for material. For additions, we also confirm whether the Tremron product on site is current production or a discontinued color, because matching a 10-year-old color blend from a big-box store photo never ends well.
On the OEM versus aftermarket question for Tremron specifically: there is no aftermarket equivalent. Tremron is the OEM. What you can do is choose a different manufacturer’s block or paver that meets the same ASTM load and absorption spec, but the color won’t match, and the dimensions rarely line up cleanly with existing work. For an addition that ties into an existing patio or walkway, we spec Tremron whenever the match matters. For a standalone ADU where nothing needs to match, we’ll compare material costs honestly and let you decide.
Styles & brands we work with
Signs Your Tremron Home Addition or ADU Hardscape Is Failing
- Pavers settling or sinking at the slab edge. This is almost always a base failure. Austin’s clay soil expands and contracts through wet-dry cycles, and if the base under the pavers wasn’t compacted to spec, the top layer sinks into the voids. It starts as a quarter-inch lip and becomes a tripping hazard within a year.
- Retaining wall block leaning or bowing outward. This is a water problem before it’s a block problem. When drainage behind the wall fails, hydrostatic pressure pushes the wall forward. By the time you see the lean, the wall has already moved more than you think, and resetting it means rebuilding the base course.
- Water pooling against the foundation after rain. If the grade around the addition doesn’t slope away at least six inches over ten feet, water sits against the slab and works its way into every crack. We see this on Austin homes built before the current drainage code, especially in older neighborhoods where lots are tight and runoff has nowhere to go.
- Efflorescence or white crust on the block face. Mineral salts leaching through masonry means water is moving through the wall where it shouldn’t be. It’s cosmetic at first, but the same water movement is slowly degrading the block and the footing under freeze-thaw cycles.
- Gaps opening between the pavers and the foundation or between wall courses. When the gap sits against a concrete edge, the sub-base washed out or was never fully restrained. Every rain event pulls more material out, and the gap widens. On a wall, course gaps mean the setback or the adhesive failed, and gravity is doing the rest.
See the difference
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After
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AfterReplacement Cost & What’s Included
For the full scope of a Tremron-integrated home addition or ADU in Austin, plan on $45,000 – $130,000 for an addition and $90,000 – $220,000 for a permitted ADU with foundation, framing, mechanicals, and hardscape. Where paver work is a smaller piece of the project, paver patio installation runs $3,500 – $11,000 and paver driveway installation runs $7,000 – $18,000 in this market. What drives the range: the condition of the subgrade, whether we’re cutting into an existing slab, retaining wall height, and how much demo and haul-off the lot requires.
Every quote includes a written line-item price before work starts, the material and labor split, and the permit scope. We don’t do change orders unless you change the scope, and you’ll know the number before a single tool gets picked up. The work is covered by the 365-Day Done Right Promise: if it’s not done right, we make it right, backed in writing.
DIY or Call Us?
You can safely inspect your own hardscape: walk the perimeter after a dry week and look for settlement, run a hose along the base of any retaining wall and watch where the water goes, and check for gaps at all the slab-to-paver transition points. Photograph anything you find and mark the spot with painter’s tape so it’s easy to locate later.
What you shouldn’t DIY: pulling up pavers and re-compacting a base without knowing the existing base depth and soil type. If the base is wrong, you’ll rebuild it wrong and pay twice. Retaining walls over three feet are a structural matter, and Austin requires engineering for walls over that height in most cases. A failed wall or settlement against a slab edge is not a weekend project. Call (409) 834-4854 and we’ll give you a straight answer on what you’re looking at.
FAQs
With a properly compacted base and good drainage, a Tremron paver patio in the Austin area should last 20 to 30 years before the base needs serious attention. The pavers themselves often outlast the base. The failure we see first is almost always sub-base settlement from clay soil movement, not the paver product.
Isolated settlement can often be repaired by lifting the affected section, re-compacting the base, and relaying the pavers. If the settlement runs across a large area or against a foundation, you’re usually better off pulling the section and redoing the base properly. Call (409) 834-4854 and we’ll tell you which one you’re looking at, no charge for the assessment.
A typical home addition runs 10 to 16 weeks from permit approval to final walkthrough, and an ADU runs 4 to 8 months depending on foundation type, utility runs, and the finish level. Austin’s permitting timeline is part of that equation, and we’ll give you a realistic schedule before we start, not a best-case scenario.
We order Tremron material to the job spec for every project, and we keep common repair quantities of pavers, edge restraint, and joint sand on hand for smaller hardscape fixes. For a full addition or ADU, the material order is cut specifically to the plan and the Tremron product line you’ve selected.
Call (409) 834-4854 for a free estimate on your Tremron home addition or ADU project in Austin. We’ll get you a written price before work starts, and Luca will walk the site himself. Measure twice, cut once, then we actually build the thing.
Written by Luca Romano, Owner, Sawyer Remodel Austin at Sawyer Remodel Austin, serving Austin and nearby areas.
