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Unilock Construction in Foster City, CA | Ashford Contractors
We’re an independent Unilock paver and retaining wall contractor serving Foster City, and our Home Remodeling in Foster City is different from anywhere else on the Peninsula: nearly every installation sits on engineered bay fill, not natural ground. That means the base, subgrade prep, and drainage plan matter more than the paver you pick. Ashford Contractors builds Unilock systems around that reality, from lagoon-front patios to driveways on reclaimed marshland. Led by Glen Mossier, we’ve worked these lots long enough to know what holds. Call (877) 752-3868 for a free estimate.
Why Foster City Residents Choose Us for Unilock Service
Our crew has spent years installing and repairing Unilock systems across Foster City’s lagoon neighborhoods, from Marlin Cove to the waterways off Edgewater Boulevard, and we’re familiar with the Highlands-Baywood Park Unilock service area as well. That matters because Unilock pavers are only as stable as the ground beneath them, and Foster City’s ground is unique. Glen Mossier grew up in Marlin Cove watching lagoon-side homes get rebuilt after Bay weather did its work, and he’s been reading this fill soil ever since. We specify genuine Unilock units, matching caps and coping pieces for repairs and extensions, plus compatible geogrid, joint sand, and drainage aggregate sourced locally. We’re independent, not manufacturer-authorized. When a base is built right, we reset and extend honestly. When the subgrade is the problem, we say so before any paver goes down.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Foster City
- Base failure from settlement. Unilock pavers installed over compacted bay fill without a properly compacted aggregate base migrate, dip, and tent along the sand joints as the subgrade shifts. The pavers are fine. The base is not. We rebuild it.
- Efflorescence and moisture staining. High groundwater along lagoon-front lots wicks upward, leaving white mineral staining on tumbled gray pavers like Brussels Block and Bristol Valley. Trapped water between units keeps concrete damp. We address the drainage, then the staining.
- Joint sand washout. Foster City’s flat grade and drainage swales push water through paver joints, eroding sand so units shift and rack out of running bond on slopes and at the crest of retaining walls. We re-sand and re-compact with the right aggregate.
- Segmental retaining wall movement. Beacon Hill and U-Cara systems fail when geogrid and drain rock were undersized for saturated fill. Caps separate and courses lean toward lagoon banks. We re-set and reinforce from the drainage layer up.
- End-of-life timber decks over water giving way to paver patios. Many original 1970s decks on Foster City lagoons are failing at once. When we replace them with Unilock patios, the base and drainage design is what protects the investment.
Unilock Service in Foster City: What Local Conditions Mean for Your Equipment
Foster City sits almost entirely on engineered fill over old Bay marshland, so a Unilock patio or driveway here lives or dies on base thickness, compaction, and dewatering, not on the pavers themselves. That is a different engineering problem than the same install on natural ground in San Mateo or Redwood City. Our crews over-excavate, lay geotextile separation fabric, and thicken the aggregate base to spread load over bay mud that moves with moisture. On lagoon-front lots, we add perimeter French drains and grade surfaces away from the house. On a lagoon-front lot in the planned-community streets near Foster City’s waterways, we pulled up an end-of-life 1970s timber deck and built a Brussels Block patio on a thickened, geotextile-separated aggregate base to spread load over the bay mud. We added a perimeter French drain and graded the surface away from the house, then capped the adjacent Beacon Hill retaining wall and re-set its geogrid so saturated fill wouldn’t push the courses toward the water. That’s what this market demands, and it’s what we deliver.
One contractor. Every system. From the roofline to the foundation, inside and out. We source from a curated roster of 50+ manufacturers, and for hardscape we work with Belgard, Unilock, Tremron, Cambridge Pavers, and Techo-Bloc. Your project, not our portfolio.
Unilock Models & Products We Service in Foster City
We install and repair Brussels Block, Beacon Hill, U-Cara, and Bristol Valley product lines across Foster City. That covers tumbled dimensional pavers, smooth-faced wall and cap systems, multi-piece modular retaining walls, and old-world-style pavers. When a repair or extension is needed, we specify genuine Unilock units and matching cap and coping pieces so the bond pattern and color lot stay consistent. We source compatible geogrid, joint sand, and drainage aggregate from local Peninsula suppliers, which keeps turnarounds shorter. Related hardscape work includes Unilock sales & service, paver patios, paver driveways, and concrete driveways, all handled in-house by our own crews rather than subbed to a landscaper.
See the difference
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AfterUnilock Service Pricing in Foster City
What you pay depends on the size of the area, the condition of the existing base, and how much dewatering and drainage work the lot requires. A paver patio that can go down on a solid base costs less than one where we’re removing a failed timber deck and rebuilding the ground to shed water. Here are the ranges for the most common Unilock construction projects in Foster City:
| Service | Price Range |
|---|---|
| Paver Patio Installation | $3,500 – $11,000 |
| Paver Driveway Installation | $7,000 – $18,000 |
| Concrete Driveway Installation | $4,500 – $12,000 |
Every free estimate includes a site walk, a look at what’s under the pavers you have, and a written line item quote. Call (877) 752-3868 to get exact numbers for your project.
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
They will if the base isn’t engineered for it. Foster City’s engineered fill and high groundwater mean a standard base that works in San Carlos or Belmont on natural ground can migrate and dip here. We over-excavate, lay geotextile fabric, thicken the aggregate base, and add drainage where the groundwater table is high. Call (877) 752-3868 and we’ll tell you honestly what your lot needs.
Yes. Lagoon-front lots have saturated fill, higher groundwater, and drainage pressure toward the water. We build these with perimeter French drains, thickened geotextile-separated bases, and grading that moves water away from the house and the seawall. Inland Foster City lots still sit on engineered fill but without the same hydraulic pressure. Call (877) 752-3868 for a site-specific read.
In most cases, yes. We specify genuine Unilock units and matching caps and coping pieces so the bond pattern and color lot stay consistent. Older pavers may have weathered to a slightly different tone, but we can usually blend the addition so it reads as intentional. Call (877) 752-3868 and we’ll look at what you have.
If it’s over three feet or holding back soil near a property line or lagoon edge, yes. As a Foster City General Contractor, we know the local building department reviews retaining wall plans, and HOA architectural boards govern many lagoon-front and planned-community lots. We pull permits and manage the HOA approval package for you. Call (877) 752-3868 for specifics on your lot.
Paver driveways run $7,000 – $18,000. Paver patios run $3,500 – $11,000. Concrete driveways run $4,500 – $12,000. The spread is driven by base condition, drainage needs, and any demolition of failed decks or existing concrete. Estimates are free. Call (877) 752-3868 for exact numbers.
Service Areas Near Foster City
We serve Foster City and the surrounding Peninsula communities. Our crews cover Foster City service area, Unilock service in Redwood Shores, Unilock service in Belmont, San Mateo, and San Carlos. That includes lagoon-front lots, planned-community homes, and everything in between.
Book Your Unilock Service in Foster City Today
Building it right the first time, and you won’t be rebuilding it in ten years. Call (877) 752-3868 to schedule your free estimate. We’ll walk the site, check the base, and give you a written quote.
Written by Glen Mossier, Owner at Ashford Contractors, serving Foster City since 2004.