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Unilock Construction in Hillsborough, CA | Ashford Contractors
Ashford Contractors provides independent Unilock installation and repair across Hillsborough’s 94010 ZIP code as a Hillsborough General Contractor, and the work here is shaped by one reality most contractors miss: clay soils, steep lots, and strict tree-protection review mean a Unilock paver driveway or retaining wall lives or dies by what’s underneath it, not just what’s on top. We’re a full-scope general contractor led by Glen Mossier, and we’ve spent years building on Peninsula hillsides where excavation, drainage, and root zones decide whether a hardscape holds. Call (877) 752-3868 for a free estimate on Unilock paver driveways, patios, and segmental retaining walls in Hillsborough.
Why Hillsborough Residents Choose Us for Unilock Service
Unilock makes a genuinely well-engineered paver. The Brussels Block, Beacon Hill, Estate Wall, and Tribeca lines hold up well when the base beneath them is built correctly. Hillsborough’s slopes and clay subgrade don’t forgive shortcuts, and that’s where our work differs. We source genuine Unilock units through regional distributors, not whatever’s close at hand, and we pair them with commercial-grade geogrid and drainage components rather than hoping the base does the job alone. Glen Mossier trained in construction technology at Skyline College in San Bruno, where materials science and mechanical systems were part of the curriculum from day one, and that background shows up every time we recompact a clay subgrade in lifts or reset a base course on a hillside. When a repair calls for matching edge restraints and caps, we order the exact Unilock profile so colors and dimensions stay consistent. One contractor. Every system, from the paver surface down to the drain rock.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Hillsborough
- Settled paver fields on driveways and motor courts. Beacon Hill and Brussels Block fields settle unevenly when base compaction was undersized over Hillsborough’s clay subgrade. The result is lippage at the joints and ponding at the apron after winter rains. We saw-cut the affected area, recompact the subgrade in lifts, and reset the pavers on a proper base.
- Leaning or bowing segmental retaining walls. Estate Wall-style systems push out of batter after rainfall when geogrid and drain rock were value-engineered out on the hillside cut. We rebuild the affected section with grid installed at the right spacing and drainage that moves water away from the back of the wall.
- Surface spalling and efflorescence from hillside runoff. Where runoff sheets across Unilock pavers instead of being collected and piped away, the surface takes a beating season after season. We correct the drainage path first, then address the paver surface.
- Joint sand loss and edge restraint separation near protected trees. Root-zone movement along wooded property lines works paver edges loose over time. We rebuild with deeper edge restraints and re-establish the joint sand once the root influence is managed.
- Failed wall sections that someone tried to patch with glue or caps. When a wall has lost its batter or the base has failed, re-gluing caps or topping with new pavers over a failing subbase doesn’t work. We rebuild the affected section to spec, matching the existing Unilock units so the terrace looks right.
Unilock Service in Hillsborough: What Local Conditions Mean for Your Equipment
Hillsborough’s planning and architecture review can approve a hardscape design while the excavation still stalls on hillside grading, drainage, and tree-protection conditions written into the lot. We’ve scoped paver and wall base work around slope and root zones enough times to know the difference between a flat-lot production schedule and what a sloped Hillsborough lot actually demands. On a wooded lot off Crystal Springs Road, we rebuilt the failing lower course of a Unilock Estate Wall system where the original wall had been built without geogrid and the winter rains had pushed it out of batter. We saw-cut the affected section, recompacted the clay subgrade in lifts, reset the base course, reinstated geogrid and drain rock, and capped it with matching Unilock units so the wall matched the rest of the terrace. Runoff was collected and piped to daylight the same week, and the wall has held its line through the following wet season. That’s the kind of site-specific work Hillsborough requires, and it’s why we don’t bid these jobs from a catalog drawing.
Unilock Models & Products We Service in Hillsborough
We install, repair, and maintain the Unilock lines most common on Hillsborough estates: Brussels Block and Beacon Hill for paver driveways, walkways, and motor courts; Estate Wall for segmental retaining walls and terraced garden beds; and Tribeca for patios and pool surrounds where a smoother surface profile is preferred. We stock matching edge restraints, caps, and joint sand for Unilock systems in common Hillsborough colorways, which means repairs don’t wait on long lead times. For failuredriveway aprons or wall sections, we use genuine Unilock units so the repaired area blends with the existing field rather than announcing itself as a patch. When a wall has lost its batter or the base has failed, we recommend rebuilding the affected section instead of re-gluing caps or topping with new pavers over a failing subbase. Our Unilock sales & service work covers both new installations and repairs to existing fields.
See the difference
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AfterUnilock Service Pricing in Hillsborough
What you’ll spend depends on the scope, the access, and what’s beneath the surface. Hillsborough’s clay subgrade and slopes mean base prep and drainage typically account for a larger share of the budget than they would on flat lots. Here’s what to expect for common Unilock work:
| Service | Typical Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Driveway Sealing | $250 – $700 |
Every free estimate includes a site walk to check slope, drainage patterns, and the condition of the existing base. We give you a written line-item quote, not a round number pulled from the air. Call (877) 752-3868 to schedule yours.
Serving Hillsborough, CA — Our Local Coverage Area
We’re based in the Hillsborough 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 Hillsborough
Clay subgrade expands and contracts with winter moisture, and when base compaction was undersized or the drainage wasn’t piped away, the paver field shifts and the apron collects water. We recompact the subgrade in lifts, install proper base, and correct the drainage path before resetting pavers. Call (877) 752-3868 and we’ll walk your driveway with you.
Yes. We order the same Unilock profile and colorway through our distributors, and we match edge restraints and caps so the repaired section blends with the existing field. The repaired area may weather slightly differently at first, but dimensions and color are the same unit.
It changes where we dig, how deep we can go, and how we manage root zones. We work within Hillsborough’s architectural and tree-protection conditions, designing base work and drainage around protected root systems rather than cutting through them. Call (877) 752-3868 for an estimate that accounts for your lot’s specific conditions.
On any wall over about two feet, yes. Below that, we still install drain rock and a proper base. Grid spacing depends on the wall height and the soil behind it. Shortcutting either is how walls end up leaning after one wet season.
Sealing protects against staining and gives the surface some protection from winter runoff, but it doesn’t fix a failing base. We seal pavers after we’ve confirmed the base and drainage are sound, or the sealer is just lipstick on a problem that’ll keep moving. If your field shows lippage or ponding, call (877) 752-3868 first.
Service Areas Near Hillsborough
In addition to our work across Hillsborough service area properties, we serve Foster City, Redwood Shores, Belmont, San Mateo, San Carlos, and Highlands-Baywood Park. For Unilock work near those communities, see our Unilock service in Emerald Lake Hills and Unilock service in Millbrae pages.
Book Your Unilock Service in Hillsborough Today
Glen Mossier and the Ashford Contractors team are ready to scope your Unilock driveway, patio, or retaining wall in Hillsborough. Call (877) 752-3868 for a free estimate. Build it right the first time, and you won’t be rebuilding it in ten years.
Written by Glen Mossier, Owner at Ashford Contractors, serving Hillsborough and offering Unilock service in San Mateo and the wider county area.