Unilock Home Additions & ADU Nationwide

Unilock Home Additions & ADU: The Boca Raton Owner’s Guide

Unilock hardscape components for home additions and ADU projects in Boca Raton typically run $45,000-$130,000 installed, depending on whether you’re extending an existing foundation with a paver patio connector or building a full detached ADU with permeable driveway and walkway integration. We stock Unilock Beacon Hill Flagstone, Umbriano, and Richcliff series pavers in our Boca Raton warehouse, and most ADU hardscape tie-ins can be priced and scheduled within 48 hours. Most owners realize their Unilock surface is failing when settling cracks appear where the original structure meets the new addition, or when pool deck pavers adjacent to an ADU footprint start draining toward the foundation instead of away from it.

Call (754) 254-8065

Which Unilock Models This Applies To

Unilock’s home addition and ADU applications in Boca Raton fall into three series families, and matching the existing substrate to the right paver system determines whether your warranty transfers and whether the surface handles our limestone-sand soils without differential settling.

Beacon Hill Flagstone is the workhorse for patio-to-room additions. It’s 60mm thick, tumbled for texture, and comes in a three-piece random bundle that hides the joint line where old concrete meets new paver base. The critical spec: the 3 1/8″ x 6″ x 9″ small rectangle must match the existing bundle ratio exactly, or the pattern breaks at the transition. We’ve seen Boca Raton homeowners order from a 2022 lot and try to blend with 2024 stock; the color drift in Umbriano’s exposed-aggregate face is visible in South Florida sun within two years.

Umbriano serves ADU driveway and walkway connectors. It’s a 70mm paver with ColorFusion technology, cast with real granite and quartz particles. The gotcha: Umbriano’s permeable version (Umbriano Permeable, 80mm) uses a different edge spacing and cannot be feathered into standard Umbriano without a saw-cut control joint. We keep both in our Boca Raton inventory because inspectors in Palm Beach County now require permeable surfaces for ADUs over 600 square feet under the current stormwater retention code.

Richcliff handles high-end pool deck and lanai extensions where the addition opens to outdoor living. It’s 80mm, embossed with a real-cast slate face, and the only Unilock paver we install with an optional EasyClean stain resistance upgrade. For ADU rentals in Boca Raton’s eastern neighborhoods, that stain resistance pays for itself on turnover cleaning.

We are an independent contractor; Rowan Construction Group Boca Raton is not affiliated with Unilock Corporation. We source through Unilock’s authorized Florida distributors and maintain compatibility cross-references for every series back to 2012.

Signs Your Unilock Home Additions & ADU Is Failing

• Step cracking along the original-to-addition joint. This happens when the ADU’s compacted base was built to a different spec than the original structure’s footing, and the Unilock surface telegraphs that differential settlement. In Boca Raton’s coral rock substrate, we see this most often in Mission Bay and west Boca additions where the builder used recycled concrete base instead of limestone screenings.
• Standing water 24 hours after rain, or white efflorescence blooming on the paver face. Both mean the bedding sand layer has washed out or the joints have lost polymeric sand. Unilock’s permeable series depends on open-graded base drainage; when that clogs with our sandy soils, water backs up and carries calcium to the surface.
• Loose pavers that rock underfoot or sound hollow when tapped. The paver hasn’t failed; the bedding course beneath it has eroded. This is common where ADU downspouts discharge directly onto the paver surface without a drain tile extension, a detail we correct on every Boca Raton job.
• Color fading or surface spalling on south-facing exposures. Unilock’s ColorFusion is UV-stable, but the cement-rich matrix in some production lots from 2018-2020 was susceptible to salt air degradation. We’ve documented this on oceanfront ADUs in Highland Beach and east Boca Raton; replacement requires matching the lot code stamped on the paver edge.
• Weeds or ant mounds pushing through joint sand. This indicates the polymeric sand broke down, usually from improper water activation during original installation or from pressure-washing with too narrow a tip. The fix is joint removal to 1″ depth and re-sanding with Unilock’s recommended compound, not generic hardware-store polymeric sand.

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Replacement Cost & What’s Included

The range depends on three factors: how much of the existing surface must be removed to access the failed base, whether Palm Beach County requires a permeable surface for your ADU footprint, and whether we can match your existing Unilock lot code or must transition to a complementary series. Every quote is a flat written price with line-item scope, delivered before work starts. Under Clause 1 of The Haven Standard, that number does not change unless you sign a change order. Our 365-Day Done Right Promise covers the installation, and we document every phase with a photo record you receive at project closeout.

DIY or Call Us?

There’s a safe middle ground for Unilock paver issues, and then there’s the point where DIY costs more than calling us.

What you can check safely: Walk the surface with a screwdriver and probe any soft spots. Photograph the paver’s stamped lot code (usually on the edge or underside) and the pattern layout. Measure the joint width, standard is 1/16″-1/8″ for Unilock tumbled series, 1/8″-3/16″ for permeable. This information lets us price accurately over the phone.

Where DIY goes wrong: Relaying pavers without correcting the base layer guarantees recurrence within two Florida wet seasons. Compacting a new base requires a plate compactor that won’t fracture the paver face, and the lift thickness matters, 6″ of limestone in two 3″ passes, not one. More critically, any ADU hardscape tied to stormwater management requires Palm Beach County inspection; unpermitted work voids your certificate of occupancy and can trigger a full removal order. We’ve been called to three Boca Raton properties in the past eighteen months where the homeowner’s self-installed paver patio had to be torn out for the ADU final to pass.

Call (754) 254-8065 and we’ll schedule a free estimate. We bring sample boards, measure your existing Unilock for lot matching, and deliver a written price before we leave.

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