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Unilock Construction in Alum Rock, CA | San Bruno Construction
We’re an independent general contractor providing Unilock paver installation and repair across Alum Rock, and here’s the short version: the work we do here has less to do with the pavers themselves and more to do with the ground under them. Alum Rock’s hillside lots, concentrated winter rains, and unincorporated county permitting mean a paver project that would be straightforward five miles west on flat San Jose land needs real site work up here. Call (866) 472-1908 to schedule a free estimate, and we’ll tell you exactly what your slope and your drainage are going to require before we ever talk paver color.
Why Alum Rock Residents Choose Us for Unilock Service
Noel Carvalho grew up in San Bruno, trained in construction technology at Skyline College, and has spent more than two decades running residential projects across the Bay Area. When a homeowner in Alum Rock calls about a paver driveway that’s shifting or a patio where the joint sand washes out every winter, we know the first question isn’t which Unilock line to order. It’s what’s happening underneath the surface. We’ve worked with Unilock Brussels Block, Cambridge Pavingstones, Copthorne, and Beacon Hill on enough slope-adjacent Alum Rock properties to know that base preparation, not paver selection, is what determines whether the job holds.
We’re an independent contractor, not a Unilock dealer or authorized installer. That means we recommend what works for the site, not what we’re obligated to push. It also means we can combine Unilock pavers with the drainage, grading, and retaining wall work that Alum Rock lots so often need. If your project scope is bigger than the paver field itself, we handle it under one contract rather than handing you off to a second crew.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Alum Rock
- Base erosion and paver settlement on sloped lots. Alum Rock’s hillside parcels shed water fast during the wet season, and that water finds its way under paver edges. By the time homeowners notice a sunken section near the driveway apron, the compacted base underneath has usually been partially washed away. We excavate to stable soil, recompact, and add drainage before re-laying the pavers.
- Efflorescence and surface staining in shaded hillside areas. White mineral deposits on pavers are common where Alum Rock lots sit against the hillside and stay damp for months. The moisture pulls salts through the paver face. We clean the surface and address the moisture source, not just the stain, because sealing over trapped moisture makes the problem repeat.
- Edge restraint failures at driveway aprons. Where Alum Rock driveways meet the street or transition from slope to flat, runoff concentrates and undercuts the edge restraints. Once the restraint fails, the whole field starts to move. We reset with Unilock’s OEM edge restraints, which match the paver system’s interlock geometry.
- Polymeric sand washout in poorly drained joints. Joint sand doesn’t just disappear. On Alum Rock lots where hillside runoff crosses a paver field, the sand gets flushed out over a season or two. The fix is usually more than re-sanding; it’s intercepting the water before it hits the joints.
- Paver shifting on unpermitted additions from decades past. A good number of Alum Rock homes have informal second units or expanded driveways that were never pulled through county plan check. When we’re called in to repair a paver surface on one of these, the project often becomes a legalization job, and we coordinate that with Santa Clara County rather than pretending the old work doesn’t exist.
Unilock Service in Alum Rock: What Local Conditions Mean for Your Equipment
Here’s something you won’t find on a generic Unilock page: because Alum Rock sits in unincorporated Santa Clara County rather than the City of San Jose, paver projects here frequently trigger county building permits with grading and drainage review. That means the county’s plan-check turnaround, not our installation schedule, determines when we can legally start excavation. This is especially true for hillside properties where retaining walls or slope stabilization are part of the scope. In practice, a driveway replacement on a flat parcel with Unilock repair in San Jose might start within a week of signing. The same job off Alum Rock Avenue can wait several weeks for the county to clear the permit. We factor that timeline into the project plan from day one, so you’re never standing in the driveway wondering where the crew is. We also sequence the work around it: drainage corrections and base prep get scheduled as soon as the permit clears, and paver installation follows immediately. The county reviews the drainage plan closely here because the hills above the neighborhood move water fast, and they want to know exactly where it’s going.
Unilock Models & Products We Service in Alum Rock
We install and repair the full range of Unilock paver lines homeowners in Alum Rock ask for. Unilock Brussels Block is the workhorse for driveways because its modular shape and thickness hold up under vehicle loads. Cambridge Pavingstones offer a different texture profile for patios and walkways. Copthorne, with its larger format, is what we often recommend when a homeowner wants a clean, less busy surface on a hillside patio. Beacon Hill adds a tumbled, aged look that works well with Alum Rock’s mid-century stucco homes.
When repairing an existing Unilock field, we use Unilock’s OEM edge restraints and joint sand because those components are engineered to match the paver system. For base aggregates, we source aftermarket stone that meets or exceeds spec for the soil conditions we actually find on Alum Rock slopes. And we always recommend repair over replacement when the base is still sound. A re-sanded, re-seated paver field that’s properly drained can look like a brand-new install for a fraction of the cost.
See the difference
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AfterUnilock Service Pricing in Alum Rock
Pricing for Unilock paver work in Alum Rock depends on three things: the size of the field, the condition of the existing base, and what drainage work the site demands. A flat patio with good base underneath is straightforward. A hillside driveway that’s been washing out for years takes more excavation, more aggregate, and possibly a French drain or retaining work. Here’s what those ranges look like:
| Service | Typical Range in Alum Rock |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Driveway Replacement | $5,000 – $14,000 |
Every estimate is free and written as a line-item breakdown, so you can see exactly what’s going toward materials, drainage, base work, and labor before you sign anything. Call (866) 472-1908 to schedule yours.
Serving Alum Rock, CA — Our Local Coverage Area
We’re based in the Alum Rock area and also provide Unilock service in East Foothills, so we 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 Alum Rock
In most cases, yes. Because Alum Rock is unincorporated Santa Clara County, a paver driveway replacement that changes the surface or involves regrading typically requires a county permit with drainage review. We handle the permit process and coordinate directly with the county. Call (866) 472-1908 and we’ll tell you whether your specific project triggers review before you spend a dollar.
We over-excavate to stable soil, install a geotextile separator, and compact the aggregate base in lifts. On Alum Rock hillsides—and on similar jobs where we do Unilock in Seven Trees—we typically add subsurface drainage at the uphill edge of the paver field so water never gets under the pavers. Skipping that step is the most common reason sloped paver work fails within a few seasons. We’d be happy to walk your property and show you exactly what we’d do. Call (866) 472-1908 for a free walkthrough.
Unilock Brussels Block is what we recommend for most Alum Rock driveways. Its thickness and interlocking geometry handle vehicle loads well, and it drains better than a solid concrete slab, which matters on hillside lots. The real difference-maker here isn’t the paver choice though. It’s the base and drainage underneath. Get that right and nearly any quality Unilock line will work. Get it wrong and even the best paver shifts.
We can match Unilock pavers in most cases, especially for current production lines like Brussels Block, Cambridge Pavingstones, and Copthorne. Older or discontinued colors are harder, and we’ll tell you honestly if a perfect match isn’t possible. Where the match is close but not exact, we often suggest blending new pavers with the existing field so the transition reads as intentional rather than patched.
Those white deposits are efflorescence, a mineral salt that rises through moist pavers and crystallizes on the surface. In Alum Rock it’s especially common on shaded, hillside-adjacent patios that stay damp for months during the wet season. Cleaning the surface helps, but if you don’t address the moisture source, the stains return. We’ll find where the water is coming from and decide whether drainage work or a breathable sealer is the right fix. Call (866) 472-1908 for an exact assessment.
Service Areas Near Alum Rock
While Alum Rock’s hillside and unincorporated county conditions are our specialty in this pocket, we also serve nearby communities. If you’re in Unilock service in Cambrian Park, we handle paver work there too. So do we in Boulder Creek, where hillside drainage is equally unforgiving. We take Unilock and paver projects in San Bruno, South San Francisco, Millbrae, Brisbane, Burlingame, and Colma as well. Unilock sales & service is something we take seriously across the whole region, and our Alum Rock service area remains a core focus.
Book Your Unilock Service in Alum Rock Today
If your paver driveway is shifting, your patio is stained, or you’re ready to replace cracked concrete with Unilock pavers—whether here or for Unilock in Buena Vista—call (866) 472-1908 to schedule a free estimate. We’ll put eyes on the site, tell you what the ground is actually doing, and write you a line-item quote that shows every dollar. Good construction doesn’t announce itself, it just works, year after year. Let’s make sure yours does.
Written by Noel Carvalho, Owner at San Bruno Construction, serving Alum Rock and the greater Bay Area since 2004.