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Tremron Home Additions & ADU: The Woodland Hills Owner’s Guide
If you own a home in Woodland Hills and you’re planning an addition or accessory dwelling unit with Tremron hardscape materials, the typical installed cost runs $45,000 to $130,000 for the addition itself, with ADU construction in the $90,000 to $220,000 range. Most Woodland Hills owners reach out to us when they discover their existing Tremron pavers or retaining wall blocks have shifted, settled, or cracked, creating uneven surfaces around the new construction area. You’ll usually notice it after a rain season, when the soil beneath Woodland Hills’ clay-heavy ground expands and contracts differently under new structural loads.
We’re an independent contractor, not affiliated with Tremron directly, but we’ve installed and worked alongside their product lines across the Valley for years. Isaac Pruett, our owner, learned early that a home addition in this part of Los Angeles means accounting for how Tremron pavers interact with new foundations, drainage, and grade changes, and that getting that detail wrong costs real money later.
Key Takeaways
- Tremron home additions and ADU projects in Woodland Hills run $45,000 – $130,000 for additions, $90,000 – $220,000 for ADUs.
- We give you a written price before any work starts, every time.
- Every crew member is background-checked, uniformed, and introduced by name and photo before they walk through your door.
- Our 365-Day Done Right Promise covers the work for a full year after completion.
Which Tremron Models This Applies To
Tremron manufactures a wide range of concrete pavers, retaining wall blocks, and hardscape materials, and compatibility matters more than most homeowners realize. Their paver lines include the Bullnose, Double Bullnose, and Holland Stone profiles, each with different thicknesses ranging from 60mm to 80mm depending on whether the application is pedestrian or vehicular. When we’re tying a new addition or ADU into an existing Tremron surface, the first thing we verify is the paver thickness and joint width on what’s already installed. An 80mm paver set for driveway traffic cannot simply be swapped for a 60mm unit meant for a walkway without creating a height mismatch at the transition.
For retaining wall blocks, Tremron’s product lines like the Estate Wall and Diamond Wall systems use different lip designs and setback angles. Mixing series means the wall won’t lock together correctly, and in a hillside community like Woodland Hills, a wall that doesn’t lock correctly is a liability, not a cosmetic issue. We match by physical measurement and product stamp where visible, and we carry specification sheets for the common Tremron lines so we can confirm compatibility on site before we recommend a path forward.
When it comes to OEM versus aftermarket replacement pieces, our position is simple: for structural applications like retaining walls and driveways, we use Tremron product or a proven equivalent matched to the exact profile and compressive strength. For decorative accents like caps and edging, a quality aftermarket piece that matches the face texture and color blend can save you 15 to 20 percent without a visible difference. We’ll tell you which situation you’re in and why.
Styles & brands we work with
Signs Your Tremron Home Additions & ADU Is Failing
- Pavers sinking or creating low spots near the new foundation. This usually means the subgrade wasn’t compacted properly before the addition was built, or drainage from the new roofline is washing out the base material. In Woodland Hills’ clay soil, water moves sideways more than it drains, which accelerates erosion under pavers.
- Retaining wall blocks tilting or bulging outward. That’s lateral pressure from soil and water building up behind the wall. It typically means the drainage aggregate or weep holes are clogged or missing, and on a hillside lot, this is a repair you don’t want to wait on.
- Visible cracks running across multiple pavers in a line. A crack that jumps from paver to paver in a straight pattern often follows a stress line from differential settling between the existing home slab and the new addition footer. The pavers are just showing you where the ground is moving.
- Joint sand washing out after every rain. If you’re sweeping sand back into joints after each storm, the edge restraint has likely failed or the base is eroding underneath. You can keep filling joints forever, but you’re treating a symptom, not the cause.
- Standing water pooling against the addition’s exterior wall. When the Tremron surface pitches toward the structure instead of away from it, water ends up against your sill plate or stucco. In Woodland Hills, where we get concentrated bursts of rain rather than steady drizzle, even a half-inch of incorrect pitch will cause problems quickly.
See the difference
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After
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AfterReplacement Cost & What’s Included
For a home addition in Woodland Hills, plan on $45,000 to $130,000 depending on square footage, foundation type, and how much of the existing Tremron hardscape must be removed, salvaged, and reinstalled. ADU construction runs $90,000 to $220,000, with the spread driven by whether you’re doing a garage conversion, a standalone structure, or an attached unit, plus site prep and utility runs. When the project includes refreshing or extending existing Tremron surfaces, that work is typically priced as a line item, and we walk you through every number before you sign anything.
The written price you receive covers the full scope: labor, materials, permits where required, demolition and haul-off, and the reinstallation or replacement of any affected Tremron pavers or wall blocks. We don’t issue verbal estimates that grow on the final bill. If something changes mid-project because we uncover a condition behind a wall or under the slab, we stop, show you what we found, and give you a revised written number before proceeding. No surprises.
Our work is covered by the 365-Day Done Right Promise. That means if anything we installed is not right within one year of the completion date, we return and fix it at no charge. The guarantee terms are written on your contract: what’s covered, what’s excluded, and for exactly how long. If a repair or installation fails, you get a free second visit. No dispute process, no fine print gymnastics.
DIY or Call Us?
There are a few things a careful homeowner can check. Walk the paver surface after a rain and mark any low spots with chalk. Look at your retaining wall from the side and see if the face is plumb. Check that joints still have sand in them and that edge restraints haven’t pulled away. These observations help you describe the problem accurately when you call, and they help us scope the job before we arrive.
What you shouldn’t do is start excavating soil from behind a bulging Tremron wall, or try to re-grade around the foundation of a new addition yourself. The pressure behind a retaining wall in Woodland Hills hillside soil is enormous, and releasing it the wrong way can turn a repair into a collapse. Cutting into your own foundation or drainage system is not a homeowner project, and botching it will cost far more than the repair you were trying to avoid. If the surface has shifted enough that you can see daylight under a paver, call (831) 290-6866. We’ll assess it, give you a written price, and get it handled.
FAQs
Tremron concrete pavers typically last 25 to 40 years in Southern California conditions when installed on a properly compacted base with correct joint stabilization. The bigger variable in Woodland Hills is drainage: pavers on a badly drained base can shift within five years. Call (831) 290-6866 and we’ll tell you honestly whether your surface has another decade in it or needs attention now.
Yes, in most cases individual sections can be lifted, the base re-compacted, and the original pavers reinstalled, especially if they’re still in good shape. Full replacement usually only makes sense when pavers are cracked through or the base has been completely compromised. We’ll show you on site which approach fits your situation.
For a typical repair like re-setting a sagging section of pavers or rebuilding a section of retaining wall, expect one to three days including re-compaction and joint sand. A full addition or ADU project runs several weeks to months depending on scope, and we’ll give you a schedule in writing before we start.
We work directly with masonry and hardscape suppliers in the Los Angeles area to source Tremron products and compatible equivalents, and we confirm lead times before we quote your job so you’re not waiting on material surprises. For common profiles we can often match stock quickly; for less common series, we’ll tell you upfront how long the order will take.
Tell me what you need done. I’ll tell you what it takes and what it costs. Then we get to work. Call (831) 290-6866 to schedule a free estimate for your Tremron home addition or ADU project in Woodland Hills.
Written by Isaac Pruett, Owner, Mason Remodeling Co – Woodland Hills, CA at Mason Remodeling Co Woodland Hills, serving Woodland Hills and nearby areas.
