Unilock Home Additions & ADU in Las Vegas, NV

Unilock Home Additions & ADU: The Las Vegas Owner’s Guide

Unilock-compatible hardscaping for home additions and ADU projects in Las Vegas typically runs $45,000-$130,000 for full additions and $90,000-$220,000 for detached ADUs, with paver patio and walkway components often installed within the same project timeline. We stock Unilock’s most requested lines - Beacon Hill Flagstone, Richcliff, and Copthorne - and can match existing installations for seamless expansion. Most Las Vegas homeowners discover their Unilock surface needs attention when expansion joints crack after summer heat cycles, or when settling reveals the base wasn’t compacted to spec during the original install.

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Which Unilock Models This Applies To

Unilock organizes its residential hardscape lines by application thickness and edge profile, and getting this wrong means your addition won’t match the existing plane height. The Beacon Hill Flagstone series runs 60mm for pedestrian use and 80mm for drive-adjacent loading - we see the 60mm spec ordered wrong most often when homeowners extend a patio into an ADU walkway. Richcliff carries a 70mm uniform thickness across all color blends, which simplifies matching but limits load-bearing retrofit options. Copthorne’s 60mm heritage brick profile requires a 12mm bedding sand layer minimum, not the 25mm some crews default to in Las Vegas.

Check your existing installation for the stamped manufacturing date on the paver edge - pre-2018 Unilock used a slightly different aggregate blend that shifts color differently under UV exposure. We source OEM-matched lots through Unilock’s western distribution center in Phoenix, or specify equivalent Belgard and Pavestone profiles when the original line has been discontinued. The paver itself is rarely the failure point; it’s the bedding course, edge restraint, or base compaction that shows symptoms first.

Signs Your Unilock Home Additions & ADU Is Failing

• Stepping or rocking under foot. This means the bedding sand has washed out or the base wasn’t compacted to 98% standard Proctor density. In Las Vegas, monsoon runoff through poorly sealed expansion joints accelerates this - we see it worst in Summerlin and Centennial Hills properties with sloped grades.
• Hairline cracks radiating from corners. Unilock’s high-density concrete mix resists freeze-thaw, but thermal expansion against rigid edging causes corner stress fractures. These start invisible and widen after two or three 115-degree summer cycles.
• Efflorescence that returns after cleaning. White mineral bloom indicates moisture migration through the base - usually a drainage layer failure or irrigation overspray keeping the bedding course saturated. Persistent efflorescence in Henderson and Boulder City often traces to caliche-heavy native soil left in the subgrade.
• Edge restraint pulling away from the border course. Plastic edging degrades in UV; steel spikes corrode in our alkaline soil. Once the edge goes, the interlock pattern loosens and the field spreads.
• Sunken areas near downspouts or HVAC condensate lines. Concentrated water flow washes fines from the base, creating voids. In Las Vegas, this typically shows within 18 months of install if the drainage plan ignored where summer storms sheet off hard surfaces.

Replacement Cost & What’s Included

The spread on full additions and ADUs reflects foundation type, utility extension distance, and whether we’re matching existing Unilock or specifying new. Paver-specific work breaks down as materials plus $8-$14 per square foot for removal, base prep, and reinstall - higher if we hit unexpected subgrade conditions or need to bring in structural fill. Our quotes include the 730-Day Done Right Promise on all workmanship, and we don’t charge for design consultation or permit expediting. Upfront pricing, no surprises - the number you see is the number you pay.

DIY or Call Us?

There’s safe checking, and then there’s work that requires proper equipment and sequencing. A homeowner can verify the paver model from stamped markings, photograph the failure pattern for diagnosis, and clear debris from drainage paths. What doesn’t work as weekend DIY: pulling pavers without understanding the base layer sequence, cutting edge restraint with the wrong tool and destabilizing the field, or guessing at bedding sand gradation.

Unilock’s interlock system depends on precise joint sand specification - polymeric sand application in Las Vegas low humidity demands exact water activation timing, and we’ve been called to fix haze-locked surfaces where homeowners rushed the cure. Base compaction requires a plate compactor with enough mass for the lift thickness; rental units often don’t. If your addition or ADU ties into permitted work, the city inspector will flag unlicensed structural modifications. Call (855) 951-4361 and we’ll walk through what you’re seeing - estimates are free, and most evaluations take under an hour.

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