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Unilock Construction in Foster City, CA | Seaside Contractors
We install, repair, and maintain Unilock pavers, walls, and outdoor living spaces across Foster City as your local Foster City General Contractor. The thing that separates our Unilock work here from any neighboring city: we detail every base for dredged bay fill and a high water table, because Foster City’s ground consolidates, shifts, and holds moisture in ways compacted native soil never does. If a patio or driveway goes down on this land without that accounting, it lipps within a few seasons. Call (833) 589-8103 for a free estimate – Glen Sorrento and the Seaside Contractors crew know exactly what we’re getting into before we cut the first excavation.
Why Foster City Residents Choose Us for Unilock Service
We’ve built hardscape on this engineered fill long enough to know its moods. The original 1960s and 70s housing stock sits on land dredged from San Francisco Bay, and that ground has been consolidating for half a century. Our approach to Unilock construction starts with that reality, not with the paver catalog. Glen Sorrento grew up in the Shell Cove neighborhood, studied building construction technology at College of San Mateo, and has spent the decades since watching how lagoon-side hardscape behaves over time, including projects needing San Mateo Unilock service. That’s why we’re the contractor Foster City homeowners call when a patio settles, a driveway edge spreads, or a wall cap starts corroding. One contractor, every trade – and with Unilock, that means base, drainage, edge restraint, and jointing all handled by the same crew that grades and sets.
Styles & brands we work with







Common Unilock Construction Problems We Solve in Foster City
- Base settlement and paver lippage: Pavers laid over the original engineered fill without a properly rebuilt base will settle unevenly. We see this most on 1960s and 70s ranch homes where the original fill has compacted inconsistently. The fix is excavation, an open-graded base, and re-setting on fresh edge restraint.
- Efflorescence and salt staining: Marine fog sits on Foster City pavers for hours each morning, and salt-laden air keeps surfaces damp. Unilock units on lagoon-side patios often develop white mineral deposits or dark staining where the base never fully drains. We address the drainage first, then clean and re-joint.
- Joint sand washout and edge failure: Winter rains push water off patios that were pitched toward the house or lagoon instead of to a positive drain. Washed-out polymeric sand and loose edge restraint follow, then paver courses spread. We re-pitch, re-restrain, and re-joint.
- Corroded metal edging and loose courses: Salt-laden bay air eats fasteners and steel edging faster in Foster City than anywhere inland on the Peninsula. Driveway aprons and wall caps show it first – loose courses, spreading patterns, rust staining at the restraint line.
- Water table complications at excavation: On lagoon-adjacent lots, digging for a proper paver base often hits groundwater before you’d expect. Dewatering and daylighted drainage become part of the job, not an afterthought. We plan for it from the first site visit.
Unilock Service in Foster City: What Local Conditions Mean for Your Equipment
Here’s the checkable fact most contractors won’t tell you: Foster City is built almost entirely on dredged bay fill between two lagoons. That is not metaphor – the land under your patio came out of San Francisco Bay, placed there to create a master-planned community in the 1960s and 70s. What this means for Unilock work is specific. On a typical inland lot, you cut, compact native soil, and build up a base. On Foster City fill, the water table sits high, the fill consolidates unevenly as decades pass, and anything near lagoon frontage has a grade that has to sit above a tidal-influenced water line. A patio that’s perfectly flat today will settle where the fill is loosest, lipping toward the water or toward whatever weak spot the original grading left behind. Glen’s approach: treat every Foster City paver job as a dewatering and settlement problem first, a finish problem second. That’s the difference between a patio that lasts twenty years here and one that needs re-leveling in five.
Unilock Models & Products We Service in Foster City
We install and service the full Unilock line that fits Foster City’s aesthetic and conditions: Brussels Block for driveways and patios that need a classic tumbled edge, Beacon Hill Flagstone for larger-format walkways and pool decks, Town Hall for a cleaner, more contemporary paver, and Avondale Wall units for seating walls and grade changes. When we tie into an existing field, we always spec genuine Unilock units and Unilock’s matching edge and jointing products – color, thickness, and dimensional tolerance stay consistent, so a repaired section doesn’t read as a patch. We keep common Unilock edge restraint, polymeric sand, and base aggregate on hand for fast turnaround on Foster City projects. Unilock sales & service is what we do all year, not a seasonal add-on.
See the difference
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AfterUnilock Service Pricing in Foster City
| Service | Price Range |
|---|---|
| Paver Patio Installation | $3,500 – $11,000 |
| Paver Driveway Installation | $7,000 – $18,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Driveway Sealing | $250 – $700 |
What drives cost in Foster City specifically: base depth and dewatering requirements, access to the work area on narrow lagoon-side lots, and whether we’re rebuilding foundation layers or just resetting surface units. A free estimate from us includes a site walk, base assessment, drainage review, and a line-item quote. Call (833) 589-8103 to schedule yours – we’ll tell you what the job actually needs before we talk materials.
Serving Foster City, CA — Our Local Coverage Area
We’re based in the Foster City area and know this community well, with experience extending to Belmont Unilock service nearby. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Foster City
Unilock pavers settle faster in Foster City because the entire city sits on dredged bay fill that has been consolidating unevenly since the 1960s and 70s. Inland cities like those served by Unilock in Redwood Shores build on compacted native soil, which moves far less. Here, a base laid to standard depth without accounting for fill consolidation and a high water table will fail within a few seasons. We rebuild the base from the disturbed layer up. Call (833) 589-8103 for an assessment of your existing patio or driveway.
Yes, and significantly. Near the lagoons, the finished grade often has to sit above a tidal-influenced water line, which changes excavation depth, base design, and drainage direction. We dewater when needed and daylight drainage away from the lagoon edge, not toward it. These are standard details for us on Foster City work, not upgrades. Call (833) 589-8103 to discuss your lot’s specific conditions.
Unilock pavers hold up well to marine air, but salt accelerates corrosion on metal edging and fasteners, and fog-season moisture drives efflorescence and joint sand degradation. We spec corrosion-resistant edging and fasteners on Foster City projects and build drainage so fog-season moisture moves through the system rather than sitting on it. Call (833) 589-8103 for an inspection of existing corrosion or staining.
Yes. We buy genuine Unilock units in the matching color, thickness, and dimensional tolerance, and use Unilock’s matching edge and polymeric joint products. The key is matching the original laying pattern and re-compacting the base at the tie-in point so the new courses settle at the same rate. Done right, it blends. Call (833) 589-8103 for a patching and tie-in estimate.
A paver patio in Foster City typically runs $3,500 to $11,000, and a paver driveway runs $7,000 to $18,000, depending on square footage, base conditions, and dewatering requirements. Driveway sealing runs $250 to $700. Your exact price depends on what we find when we dig, not a per-square-foot guess. Call (833) 589-8103 for a free line-item estimate.
Service Areas Near Foster City
We serve Foster City and the surrounding Peninsula and coastal communities. Foster City service area is our home base. For Unilock work in nearby coastal spots, see our Unilock service in Half Moon Bay page. We also cover Unilock service in Highlands-Baywood Park and the broader San Mateo County area.
Book Your Unilock Service in Foster City Today
One crew handles your Unilock patio, driveway, or wall from excavation through final jointing. Call (833) 589-8103 to schedule a free estimate. We’ll walk the site, check the base, and give you a straight answer on what your Foster City project actually needs.
Written by Glen Sorrento, Owner at Seaside Contractors, serving Foster City’s lagoon-side homes and engineered-fill lots since 2010.