Tremron Home Additions & ADU Nationwide

Tremron Home Additions & ADU: The Pomona Owner’s Guide

We stock and install Tremron-compatible pavers, retaining-wall block, and hardscape components for home additions and ADU projects in Pomona, with typical installed pricing for addition hardscapes running $45,000-$130,000 depending on footprint and finish. Most Tremron product failures we see are cracked pavers, settled retaining walls, or failed edge restraints on outdoor living spaces tied to new additions, and we can usually match your existing color and profile from our supplier network within a day. In Pomona’s clay-heavy soils near the foothills, we’ve learned that Tremron’s Olde Towne and Stonehurst lines hold up well when the base prep is done right, but the edge restraint is almost always the first thing to go.

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Which Tremron Models This Applies To

Tremron manufactures several product families that show up on Pomona addition and ADU projects, and matching the right one matters for both structural performance and visual consistency. The most common we encounter are the Olde Towne paver series (60mm and 80mm thicknesses), Stonehurst (the tumbled, larger-format option), Aqua Bric permeable pavers used for driveway extensions off new ADU garages, and retaining wall block in the Mini-Creta and Celtik Wall lines. Check the paver itself for a molded Tremron logo on the spacer lug, or look for a color code sticker on the pallet if you have leftover material. Thickness is the critical spec: 60mm is standard for pedestrian patios, 80mm for vehicular or heavy-use areas, and swapping one for the other without adjusting base depth leads to differential settlement within two seasons. We source OEM Tremron where the color is still in production; for discontinued shades, we match to quality aftermarket equivalents from Belgard or Techo-Bloc and document the substitution in your project file. Measure twice, then we can talk.

Signs Your Tremron Hardscape Is Failing

• Sunken or tilting pavers near the addition threshold. This usually means the aggregate base washed out or wasn’t compacted to 98% standard Proctor density. In Pomona, where Caltrans Class 2 base rock can shift during our dry-to-wet winter transitions, we see this most on ADU patios poured over old irrigation trenches.
• Retaining wall leaning or cracking. Mini-Creta walls fail when drainage aggregate behind the block is missing or clogged, hydrostatic pressure builds, and the setback angle reverses. We find this on south-facing addition sites where sprinkler runoff concentrates.
• Pavers spalling or flaking at the surface. This is a manufacturing defect in some 2018-2021 production lots where excess air entrainment weakened the face, but it’s often misdiagnosed as salt damage. Tremron acknowledged the issue on specific color runs; we verify lot codes before quoting replacement.
• Edge restraints pulling away from the perimeter. Plastic edging degrades in UV faster than the pavers themselves, especially on west-facing Pomona lots. Once the edge goes, the field pattern loosens and individual units migrate.
• Weeds growing through joints despite polymeric sand. The sand bedded improperly or washed out before activation, leaving voids. On Tremron permeable installations (Aqua Bric), this signals the No. 8 stone reservoir is clogged with fines and needs extraction.

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Replacement Cost & What’s Included

For Tremron hardscape repair or replacement tied to a Pomona home addition or ADU, expect installed pricing in these ranges:

• Partial patio/paver repair (up to 200 sq ft): $2,500-$7,500
• Full patio replacement with base reconstruction: $8,000-$18,000
• Mini-Creta retaining wall repair (localized): $3,500-$9,000
• Complete addition hardscape package (pavers, walls, steps): $45,000-$130,000

The spread depends on three things: whether we can salvage and relay existing pavers (saves 30-40% on material), how much base reconstruction is needed after excavation, and whether your project triggers Pomona’s planning department site plan review for impervious surface ratios. Our quote is a flat written price with a written scope, delivered before anyone picks up a shovel. Under Clause 1 of the Haven Standard, that number doesn’t move unless you sign a change order. Every project carries our 365-Day Done Right Promise, and the photo record we deliver at completion shows before, during, and after.

DIY or Call Us?

There’s a clear line here. A homeowner can safely pull a few loose pavers, check for obvious base erosion, and relay them with a rubber mallet and fresh joint sand, provided the edge restraint is still sound. What goes wrong fast: compacting base without a plate compactor (hand tamping leaves voids that collapse in six months), guessing at drainage slope (Pomona requires 2% minimum away from structures, and inspectors check it), or attempting to cut retaining wall block with anything less than a wet saw with a diamond blade, which risks kickback and hand injury. For wall rebuilds, any height over 30 inches triggers California Building Code requirements for engineered footings and permit inspection. We pull those permits as standard, and the signed-off documentation protects your resale value. If you’re unsure whether you’re looking at a relay or a rebuild, call (626) 606-1081 and we’ll walk through what you’re seeing. Estimates are free, and we deliver them in writing.

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