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Unilock Construction in Foster City, CA | San Bernardino Contractors
We provide independent Unilock paver installation and repair across Foster City, from Brussels Block driveways to lagoon-side patios, as well as Belmont Unilock service nearby. The one thing that separates Unilock work here from anywhere else on the Peninsula is the ground underneath: nearly every lot sits on dredged bay fill, so base prep, drainage, and edge restraint carry the job, not the paver itself. Call (855) 473-5620 for a free estimate on any Unilock project in Foster City.
Why Foster City Residents Choose Us for Unilock Service
Ruben Castillo, owner of San Bernardino Contractors, grew up watching his uncle frame garages and reroof houses on a tight budget in San Bernardino’s Westside. That hands-on education, followed by construction technology training at San Bernardino Valley College, taught him to read load paths and never cut corners on anything structural. Those habits carry over to every Unilock job we run in Foster City.
We buy Unilock product directly and install it as an independent contractor, meaning we’re not tied to a manufacturer script. We specify the base, drainage, and edge restraint to the actual site, not to a catalog page. That approach matters in Foster City, where high groundwater and settled lagoon fill punish a shallow base faster than almost any other soil condition on the Peninsula.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Foster City
- Base failure and rutting on paver driveways. Unilock units are sound, but when they’re set over a thin base on engineered fill, the bedding layer telegraphs movement and pond water. We see this constantly on 1960s and 1970s Foster City lots where original fill has settled unevenly.
- Joint sand washout along lagoon-side patios. Winter storm and king-tide overtopping strip polymetric sand from seawall-adjacent walks faster than rain alone. On canal-backing properties, this is a seasonal fight unless the base drains properly.
- Efflorescence and salt staining on Brussels Block and flagstone profiles. Foggy bayside exposure leaves mineral deposits on tumbled and dimensional profiles. It’s cosmetic, but it tells you moisture is moving through the system.
- Paver creep at bulkhead edges. Where original fill and bulkheads have settled over decades, pavers migrate toward the lagoon. Edge restraint that works on stable soil fails here if it isn’t anchored to a sound subgrade.
- Edge restraint heave from high groundwater. Foster City’s water table sits close to the surface, and when groundwater wicks into the base course, the restraint pattern freezes and shifts in winter. We re-anchor restraint to a deeper, better-drained base rather than resetting the same failure.
Unilock Service in Foster City: What Local Conditions Mean for Your Equipment
Foster City’s master plan built the lagoon and canal network by dredging bay fill, which means paver patios and docks on the water side of a lot often sit on decades-settled fill and original bulkheads. A paver job there is really a base-rebuild and edge-restraint job before a single unit goes down. That’s not true in San Mateo or Unilock in Redwood Shores, where you’re mostly on stable inland soil. Here, if you skip the base work, the Unilock units will hold up fine and the patio will still fail. On a lagoon-backing lot off Port Royal Avenue, a homeowner’s Brussels Block patio had heaved and lost joint sand along the seawall edge. We found the original fill had settled under the beach-entry course. We pulled the units, re-graded and compacted a deeper base with proper drainage away from the bulkhead, reset the Brussels Block with fresh polymeric joint sand, and re-anchored the edge restraint. The patio has stayed flat and tight through two winter king-tide cycles.
Unilock Models & Products We Service in Foster City
We work with the full Unilock line relevant to Foster City homes: Brussels Block (tumbled, dimensional), Beacon Hill Flagstone (smooth flagstone-look pavers), Bristol Valley (traditional tumbled wall and paver), and Unilock’s permeable and open-joint paver systems. For anything visible or load-bearing, we specify genuine Unilock units and Unilock-recommended polymeric joint sand. We’ll substitute a compatible paver profile only when thickness and color match. We stock common Unilock profiles locally for fast Foster City turnaround, and our team is familiar with every model we install. That brand depth is part of why we’re also known for Unilock sales & service across the wider Peninsula.
See the difference
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AfterUnilock Service Pricing in Foster City
Paver work in Foster City costs more than it does on stable inland soil because the base and drainage are heavier lifts here. You’re paying for excavation to solid ground, deeper aggregate, and edging that holds against groundwater. That’s the honest math. Here’s where things land:
| Project | Cost Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Driveway Replacement | $5,000 – $14,000 |
Every estimate includes a walk of the site, a look at what’s underneath, and a written line-item quote. If it’s not built right the first time, you’re just paying for it twice. Call (855) 473-5620 to schedule yours.
Serving Foster City, CA — Our Local Coverage Area
We’re based in the Foster City area and know this community well, offering Foster City General Contractor expertise. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Foster City
No. Dredged bay fill compacts unevenly over decades, and anything set directly on it will shift, rut, or pond water. The pavers need a properly compacted, well-drained base built up from stable subgrade. On lagoon-side lots this almost always means excavation first. Call (855) 473-5620 and we’ll tell you exactly what’s under your existing patio before we quote.
Because king-tide and winter storm overtopping strips sand faster than rain alone, and if the base doesn’t drain away from the bulkhead, water lingers and erodes the joints from below. The fix is re-grading the base and using fresh polymeric joint sand, not just topping off the surface. Call (855) 473-5620 for a free estimate on a proper sand and base reset.
Usually the base. Unilock units themselves hold up, but a thin or poorly compacted base over Foster City fill will rut, heave, and pond water, which shows up as uneven pavers and cracked joint sand. If you see waves or dips in the field, the base has moved. We’ll assess whether a partial repair makes sense or a full rebuild is the honest call. Call (855) 473-5620 to have us look.
Beacon Hill Flagstone works well on lagoon-side decks because its smooth profile sheds water cleanly and resists salt staining better than tumbled finishes like Brussels Block. But the paver choice is secondary to base and edge restraint. Get those wrong and even the best profile will creep toward the water. Call (855) 473-5620 and we’ll spec both the profile and the base for your specific canal exposure.
Yes. We rebuild the paver field up to and including the bulkhead transition, re-anchoring edge restraint against settled fill and grading drainage away from the water. We don’t rebuild the seawall itself, but we coordinate with your bulkhead contractor so the paver edge locks in correctly. Call (855) 473-5620 to schedule a look at the whole edge condition.
Service Areas Near Foster City
We serve Foster City and neighboring Peninsula communities, including San Mateo, Redwood City, Belmont, and San Carlos. For homeowners further up the Bay, we also offer Unilock service in San Mateo and Unilock service in Highlands-Baywood Park. Visit our Foster City service area page for full coverage details.
Book Your Unilock Service in Foster City Today
If your Unilock patio, driveway, or lagoon-side walk needs work, don’t patch over a base problem that will come back—explore our Home Remodeling in Foster City for comprehensive solutions. Call (855) 473-5620 to schedule a free estimate with Ruben Castillo and our team. We’ll tell you straight what’s underneath and what it’ll take to make it hold.
Written by Ruben Castillo, Owner at San Bernardino Contractors, serving Foster City and the wider Peninsula.