Tremron Home Additions & ADU Nationwide | Barrett & Sons Construction

Tremron Home Additions & ADU: The Los Angeles Owner’s Guide

We install and service Tremron home additions and ADU projects throughout Los Angeles, with typical full-scope addition work running $53,100 to $153,400 depending on size, permits, and finish level. Most Tremron-related addition failures we see are not the pavers themselves but the base prep, drainage, and connection details where the block meets the house. You’ll usually notice the problem as a shifting course, a cracked corner block, or water pooling against the foundation after rain.

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Tremron is one of the paver and block brands we stock and install regularly, and we’ve worked with their full hardscape line on ADU pads, walkways, and retaining details for years. Barrett & Sons Construction is an independent contractor and not affiliated with Tremron, but we know their block dimensions and installation patterns well enough to match existing work without guesswork.

Key Takeaways:

• Full Tremron home addition or ADU hardscape work in Los Angeles typically runs $53,100 to $153,400 installed.
• We match existing Tremron block by dimension, color code, and series, not by eyeballing a photo.
• Most failures trace back to base prep or drainage, not the block itself.
• Written change orders before any scope change, every single time.

Which Tremron Models This Applies To

Tremron manufactures several paver and wall block series, and the right match depends on what was originally installed. Their line includes Holland stone, Bullnose, Olde Towne pavers, and a range of retaining wall blocks in multiple face styles. The critical thing most Los Angeles homeowners don’t realize is that block color code and manufacturing batch both matter. A “charcoal” paver poured in 2019 may not match the same named color poured in 2024. We order by the stamped color code on the original paperwork when it exists, and when it doesn’t, we take a physical sample from the site and match it under daylight, not store lighting.

For OEM versus aftermarket, we’ll be straight with you. Tremron blocks have precise dimensional tolerances, and for load-bearing details like ADU foundation pads or retaining courses, we use genuine Tremron product. For non-structural pavers where color matching is the bigger issue, a quality aftermarket block in the same dimension and finish can work, but we’ll show you the comparison and put the choice in writing before we order anything.

Signs Your Tremron Home Additions & ADU Surface Is Failing

• Pooling water against the foundation after rain. This usually means the base under the pavers has compacted unevenly or the drainage slope was never cut correctly. In Los Angeles clay soil, this is the most common failure we repair.
• A course of wall block leaning outward. Almost always a sign the original install skipped geogrid or skimped on the buried setback. The block is fine; the engineering behind it was not.
• Cracked corner blocks at walkway edges. Corners fail first because they carry point load from foot traffic and any vehicle that clips the edge. The cause is often a missing edge restraint.
• Pavers shifting underfoot near a downspout or irrigation line. Water erodes the bedding sand and the blocks float. We fix the water source first, then re-bed the area.
• Visible gaps opening between blocks over time. In Southern California heat cycling, pavers expand and contract. Without proper joint sand and edge restraint, gaps widen every summer.

Replacement Cost & What’s Included

For Tremron home addition and ADU hardscape work in Los Angeles, installed pricing runs from about $53,100 on the low end for a modest paver expansion to $153,400 for a full ADU pad, walkways, retaining details, and drainage work. The spread comes down to square footage, base depth requirements, permitting, and whether we’re matching existing block or doing everything fresh.

Every estimate we write includes parts, labor, base prep, joint sand, edge restraint, and clean-up, itemized so you see exactly where the money goes. We pull permits on every eligible job and the inspector signs off before we’re done. The work carries our 90-Day Done Right Promise in writing. If it’s not right, Tom Barrett comes back and makes it right, one call.

DIY or Call Us?

For this kind of work, the honest answer is call us. Pouring a proper base, cutting drainage slope, and matching existing Tremron block takes equipment and an eye for what’s happening under the surface. We’ve torn out enough DIY paver pads in Los Angeles to know that what looks level on top is usually wrong underneath. You can safely check your own drainage by watching where water sits after the next rain, and you can measure the visible square footage to get a rough picture of scope.

What you shouldn’t do is start pulling blocks and re-bedding them yourself on any surface tied to your foundation or a retaining wall. If the slope is wrong or the base is compromised, you’ll be back in the same spot in a year. Call (877) 610-1318 and we’ll come look at it, tell you what’s actually wrong, and write the fix down in plain English.

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