Unilock Home Additions & ADU Nationwide

Unilock Home Additions & ADU: The Long Beach Owner’s Guide

We stock and install Unilock-compatible paver systems for home additions and ADU hardscaping in Long Beach, with typical installed projects running $45,000-$130,000 for full additions and $90,000-$220,000 for detached ADUs. Most Unilock paver patio, walkway, and driveway components tied to your addition project are available with next-day sourcing through our Long Beach supply chain. Homeowners usually discover an issue when settling pavers create trip hazards near the new foundation, drainage channels clog with harbor-area silt, or the color-matched border stones separate from the main field after winter rains.

Call (424) 567-7009

Which Unilock Models This Applies To

Unilock’s product lines for residential hardscaping divide into three tiers, and the part you need depends on which system was specified in your original addition or ADU plans. The EnduraColor series, including Beacon Hill Flagstone and Richcliff, uses a two-layer manufacturing process where the wear surface is distinct from the body paver. If your Long Beach addition shows surface spalling, you need the exact EnduraColor SKU to maintain color match. The Classic series, such as Hollandstone and Courtstone, are through-body pavers, so a dimensional match is sufficient. The U-Cara multi-face wall system, common in ADU planter beds and seat walls, requires matching face sheets and compatible clips.

To identify your part, locate the Unilock pallet tag or invoice from the original install; the product code format is typically three letters followed by four digits. Measure a representative paver: Classic Hollandstone runs 200mm × 100mm × 60mm, while Beacon Hill Flagstone is 610mm × 406mm × 60mm. For OEM versus aftermarket, we source direct from Unilock’s Ontario, CA distribution center for color-critical repairs, and use Belgard or Techo-Bloc equivalents only when the customer accepts a visible variation. In Long Beach’s marine climate, we’ve found aftermarket permeable pavers often fail the salt-mist exposure test within three years.

Signs Your Unilock Home Additions & ADU Is Failing

• Pavers settling or rocking underfoot near the addition foundation. This usually means the open-graded base was compromised during the structural backfill, or the ¾-inch crushed stone bedding layer washed out through a failed edge restraint. The fix requires lifting the affected field, recompacting the base, and reinstalling with fresh bedding sand.
• White efflorescence blooming across the surface after rain. This is calcium hydroxide migrating from the cementitious body, common in Long Beach where winter storms follow dry spells. It is not structural damage, but on EnduraColor products it signals that the protective face layer may be permeable; we test absorption rates before warrantying any sealant application.
• Edge restraints pulling away from the paver field. Plastic or aluminum edging secured with 10-inch spikes degrades when subjected to the expansion cycles of a new addition’s concrete foundation. We replace with heavy-duty steel edging on commercial-grade stakes for anything within 18 inches of structural concrete.
• Joint sand washing out, leaving gaps that collect harbor-area debris. Standard polymeric sand breaks down under the sodium air exposure near Belmont Shore and the Peninsula. We spec Unilock’s proprietary polymeric compound or switch to resin-bound jointing on repairs within two miles of the coast.
• Color mismatch after replacing individual pavers. Unilock dyes vary by production batch, and pavers left in direct Long Beach sun fade at approximately 1-2 Delta E units annually. We pull from retained stock when available, or blend replacement pavers from multiple pallets to distribute the variation.

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Replacement Cost & What’s Included

The range depends on three factors: access for mini-excavator or hand demolition, whether we match existing Unilock stock or specify new, and if the addition’s drainage plan requires regrading. Under Clause 1 of the Haven Standard, you receive a written price before anyone picks up a tool. The quote is flat; the scope is written; the 365-Day Done Right Promise applies. No change proceeds without a signed change order, which is how we’ve kept 4,000-plus projects within a few percent of the agreed number since 2007.

DIY or Call Us?

What you can safely check: verify whether the paver is loose or the base has failed by tapping with a rubber mallet and observing whether adjacent units move. Check for standing water 30 minutes after hosing the area; if it remains, your bedding layer is likely contaminated with fines. These observations help us diagnose before we arrive.

Where DIY goes wrong: lifting pavers without marking their original positions destroys the running bond pattern. Recompacting the base without a plate compactor rated for 5,000 pounds of centrifugal force leaves voids that telegraph through in six months. And in Long Beach, excavating within 18 inches of a gas line or sewer lateral without USA North 811 clearance is a code violation with real liability. We pull permits when the repair exceeds 50 square feet or involves drainage modification. For anything tied to your addition’s structural warranty, documentation matters. Call (424) 567-7009 and we’ll schedule a free estimate with a written scope.

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