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Unilock Construction in Foster City, CA | Daly City Construction
We install and repair Unilock paver driveways, patios, and retaining walls throughout Foster City as an independent contractor, which means our specs come from the soil and drainage reality of engineered fill over tidal marsh, not a dealer program. The single factor that changes Unilock work here versus anywhere else on the Peninsula: almost every lot sits on soft bay mud with high groundwater, so base construction and drainage engineering determine whether your pavers last fifteen years or start heaving in three. Call (866) 505-5254 for a free estimate on Unilock construction in Foster City from a Foster City General Contractor who knows the local conditions, and we’ll tell you straight what your project actually needs.

Why Foster City Residents Choose Us for Unilock Service
We’ve pulled apart enough failed paver jobs in Foster City to know exactly where corners get cut: thin crushed-rock bases over uncompacted fill, no geotextile separation between aggregate and bay mud, edge restraints that pop loose when the ground shifts. Most of it looks fine the first year. Then the lagoon-side moisture works its way up through the joints, the pavers settle unevenly toward the water, and a patio that should have lasted decades needs full reconstruction by year five. We spec Unilock components by what the soil and shoreline actually demand, not by what’s stacked in a showroom.
Noel Cabrera, our owner, grew up in Daly City’s Westlake district watching his uncle re-frame a garage, then put in years on residential jobs across San Mateo and San Francisco counties before founding Daly City Construction. He’s seen what fog-weathered, salt-soaked bayfront homes do to exterior surfaces over time, and brings that same San Mateo Unilock service experience to every Foster City project. When it comes to Unilock work in Foster City, our approach is simple: build the base like it’s going to get wet and stay wet, because it will. We’re an independent Unilock service provider, not manufacturer-affiliated or authorized, and that independence means we’re not tied to a dealer sales program. We’re tied to the result in your yard.
We carry genuine Unilock pavers, caps, and edge restraints for color and dimensional match on repairs and extensions, and we use quality aftermarket geogrid, filter fabric, and polymeric joint sand where they outperform the stock spec. Single point of contact from excavation to final compaction.
Styles & brands we work with







Common Unilock Construction Problems We Solve in Foster City
- Efflorescence and salt bloom on Brussels Block and Uni-Stone pavers. Constant salt-laden marine air off the Bay plus wet-dry cycling on lagoon-adjacent lots pulls minerals up through the paver surface as a chalky white film. It’s not a product defect, it’s the Foster City environment. We clean and seal the field after repairing the drainage that feeds it.
- Joint sand washout and paver settlement over soft fill. When a compacted aggregate base goes down over engineered fill without a geotextile separation layer and a subdrain, the base erodes from below. Pavers shift, joints open, and water pumps mud up through the seams. We excavate to stable material, lay separation fabric, and build a base that handles high groundwater instead of fighting it.
- Moss, algae, and dark staining on shaded patios. The fog-cooled microclimate on north-facing Foster City lots keeps pavers damp for months at a time. Where drainage is slow, moss takes hold fast. We regrade and add surface drainage before treating the stains, so the fix lasts beyond the next fog season.
- Edge restraint heave where base drainage was never tied to lagoon-side grade. Water trapped in a paver field has nowhere to go, so it pushes the perimeter outward. We install edge restraints and subdrains that shed water toward the lagoon-side grade the way the site was engineered to drain.
- Retaining wall bulging and cap separation on Lineo walls. Walls built without proper geogrid and drainage aggregate backfill in high-groundwater fill soils start leaning within a few seasons. We rebuild the wall with geogrid reinforcement, clean aggregate behind the face, and a weeping system that reduces hydrostatic pressure. No surface fix solves a retaining wall moving under load.
Unilock Service in Foster City: What Local Conditions Mean for Your Equipment
Almost every Foster City lot sits on engineered fill over former tidal marsh, and the city’s building division runs the region’s tightest plan review for a city its size. That combination shapes every Unilock construction project here in ways a same-size job in San Mateo or Redwood City never sees, which is why our Highlands-Baywood Park Unilock service clients see similar attention to local soil conditions. A paver patio or driveway replacement on a standard Foster City lot can trigger fill-soil analysis, drainage review, and floodplain-elevation checks that a contractor in a neighboring city simply never touches. Add the lagoon’s buried sheet-pile edge on waterfront properties, and even a modest deck extension or patio addition needs engineering attention most crews aren’t prepared for. Off Shell Boulevard, we pulled up a failing Brussels Block patio where the original crew had set pavers on a thin base directly over fill with no separation fabric, and the whole field had settled toward the water. We excavated to stable material, laid geotextile and compacted aggregate with a subdrain tied to the lagoon-side grade, reset the Brussels Block and locked the edge with Unilock restraints and polymeric joint sand. The patio now sheds winter rain instead of pumping bay-mud moisture up through the joints. In Foster City, the base isn’t prep work. It’s the whole job.
Unilock Models & Products We Service in Foster City
We install and repair the Unilock line that actually fits Foster City conditions: Brussels Block for classic driveways and patios, Uni-Stone for a modern modular field, Beacon Hill for a more dressed look, and Lineo for structural retaining walls along canal slopes and grade changes. For repairs and extensions, we source genuine Unilock pavers and caps to match the existing color and dimension, so a patch doesn’t read as a patch six months later. Where aftermarket geogrid, filter fabric, or polymeric sand outperforms the standard spec in wet fill soils, we use it and tell you why. We stock common Foster City repair components locally, which keeps turnaround tight when a wall needs cap replacement or an edge restraint has let go.
See the difference
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After
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AfterUnilock Service Pricing in Foster City
| Service | Price Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Driveway Replacement | $5,000 – $14,000 |
What drives cost in Foster City is almost always below the surface: excavation depth to reach stable material, geotextile and subdrain installation, and whether the city requires fill-soil or floodplain review before we can even pull a permit. A patio on a well-drained lot costs less than the identical square footage on a lagoon-facing lot where we’re engineering against high groundwater and sheet-pile proximity. Your free estimate includes a written line-item breakdown of base construction, drainage, pavers, and edge restraints. Call (866) 505-5254 and we’ll walk the site and price it honestly.
Serving Foster City, CA — Our Local Coverage Area
We’re based in the Foster City area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Foster City
Yes, but only if the base and backfill are engineered for Foster City’s fill soils and high groundwater. Lineo is a structural segmental wall block, which means it needs geogrid reinforcement, clean drainage aggregate behind the face, and a weeping system to relieve hydrostatic pressure. Built correctly, a Lineo wall holds canal-side grade changes for decades. Built without those components, it will bulge and the caps will separate within a few wet seasons. Call (866) 505-5254 and we’ll assess the slope and soil before recommending a wall design.
No. Daly City Construction is an independent contractor that installs and repairs Unilock products, not a manufacturer-authorized dealer. That independence is the point: we spec Unilock components based on what your Foster City soil and drainage actually require, not on a dealer program’s inventory push.
Yes, for anything visible: pavers, caps, and edge restraints. We source genuine Unilock units so the color and dimensional match are consistent with your existing field. Where a quality aftermarket geogrid, filter fabric, or polymeric joint sand outperforms the standard spec in wet fill conditions, we use that instead and explain why it’s the stronger choice.
Most paver patios and driveways in Foster City run five to ten working days from excavation through final compaction, but city plan review can add weeks. Fill-soil, drainage, and floodplain-elevation checks are common here, and they move on Foster City’s schedule, not ours. We handle the permit submittal and coordinate with the building division directly.
A Unilock paver patio in Foster City typically runs $3,500 to $11,000, with the range driven mostly by excavation depth, drainage requirements, and site access. Lagoon-adjacent lots on fill usually land at the higher end because we’re building against high groundwater and possibly sheet-pile proximity. Call (866) 505-5254 for a free, written line-item estimate. No change orders, no surprises.
Service Areas Near Foster City
Beyond Foster City, we provide Unilock sales & service across the Peninsula and into the city. Our Foster City service area coverage extends to nearby communities including Unilock service in Belmont, Unilock service in Redwood Shores, San Mateo, and Brisbane. If you’re on the lagoon or a canal-side lot, we know the conditions.
Book Your Unilock Service in Foster City Today
Whether you’re replacing a settled paver driveway or building a new Unilock patio on a lagoon-front lot, the base and drainage are where the job gets won or lost in Foster City, and our Home Remodeling in Foster City approach starts with getting those fundamentals right. Call (866) 505-5254 to schedule your free estimate. Tell me what the house needs, not what you think it needs, then we’ll figure out the right fix.
Written by Noel Cabrera, Owner at Daly City Construction, serving Foster City and the Peninsula.