Unilock Construction in Hillsborough, CA

Unilock Construction in Hillsborough, CA | Seaside Contractors

We install, repair, and rebuild Unilock paver driveways, patios, and retaining walls across Hillsborough, CA. The difference here isn’t just the product knowledge, it’s understanding Hillsborough’s own design-review process and hillside drainage requirements, which shape how every Unilock installation has to be built from the base up. We’re an independent contractor, not Unilock-affiliated, and we’ve been working on Hillsborough’s estate lots long enough to know what holds up on a slope and what doesn’t. Call (833) 589-8103 to schedule a free estimate.

Call (833) 589-8103

Why Hillsborough Residents Choose Us for Unilock Service

Unilock makes a genuinely good paver system. But the product is only as good as the base it sits on, and in Hillsborough that base has to contend with things most flat-lot installs never face: wet winters, sloped grades, expansive clay pockets, and a town that wants to see your drainage plan before you move a yard of earth. We know the product lines, the base specs they demand, and where they fail on Hillsborough’s particular parcels. Glen Sorrento grew up on the Peninsula, studied building construction technology at College of San Mateo, and has spent two-plus decades working through every project type this area throws at a Hillsborough General Contractor. He’s the one who’ll walk your estate lot, look at the grade, and tell you whether that Unilock Brussels Block driveway needs a deeper open-graded base or a different joint sand. Let’s figure out what the job actually needs, then we’ll talk materials. That’s how we approach every Hillsborough Unilock project, from a small paver patio to a full driveway replacement.

We’re not authorized, sponsored, or endorsed by Unilock. We’re an independent outfit that installs their systems and stands behind our own work. That independence actually works in your favor: we’re not obligated to push a full tear-out when a section repair will do, and we spec materials based on what the site needs, not what the catalog says.

Common Unilock Construction Problems We Solve in Hillsborough

• Joint sand washing out on sloped driveways: Hillsborough’s winter rains hit hard, and on a 10% grade or steeper, generic joint sand literally washes downhill. We see this constantly on estate driveways. The fix is compatible polymeric joint sand plus edge restraints that actually hold, and we’ll tell you if the slope itself needs a better drainage detail.
• Efflorescence on paver surfaces: That white chalky bloom on Brussels Block or Beacon Hill flatwork isn’t a defect, it’s moisture migrating through the paver and leaving mineral salts behind. On Hillsborough lots where drainage planes pond water against the base, it shows up more often. We’ll diagnose whether it’s cosmetic or a sign of a drainage problem underneath.
• Base failure and rutting on sloped driveways: This is the big one. If the open-graded aggregate was under-compacted, or the installer didn’t account for Hillsborough’s hillside runoff, you’ll get ruts and settlement within a season or two. A paver is only as strong as what’s under it, and we rebuild bases properly.
• Retaining wall settlement and bulging on sloped lots: Pisa2 and similar modular retaining systems need geogrid reinforcement when the wall is holding back real grade. On a Hillsborough hillside, skipping that step means a wall that bulges outward over time. We’ve fixed enough of them to know what the original installer skipped.
• Edge restraints loosening on curved drives and walkways: Hillsborough’s larger lots often mean curved paver fields, and a curved edge needs proper restraint or the units creep outward. We replace loose edges with Unilock-compatible restraint and reset the field so it stays put.

Unilock Service in Hillsborough: What Local Conditions Mean for Your Equipment

Here’s the thing about Hillsborough that nobody outside the town fully appreciates: it runs its own design-review and hillside/grading approvals on top of geotechnical review. So a Unilock paver driveway, retaining wall, or patio that changes grade or runoff on a sloped estate lot often has to clear town architectural and drainage scrutiny that a neighboring Unilock service in San Mateo or Burlingame job would never trigger. We’ve worked with Hillsborough’s process long enough to know what the reviewers look for: drainage plans that show where runoff goes, retaining wall details that prove structural stability, and material choices that fit the architectural character of the neighborhood. On a gated estate off Floribunda Avenue, we rebuilt a failing paver driveway that had settled along the slope and was ponding water against the garage. The old base had been laid too shallow and under-compacted. We pulled the units, re-excavated to a deeper open-graded base, reset Unilock Brussels Block with proper edge restraint and polymeric joint sand, and regraded so runoff sheeted away from the structure. The finished drive now holds through the wet season instead of rutting. That’s the kind of local knowledge that matters more than a product spec sheet.

Unilock Models & Products We Service in Hillsborough

We work with the Unilock lines that perform best on Hillsborough’s slopes and in its landscaping aesthetic. That includes Brussels Block, the classic three-stone modular paver that reads as natural stone and holds up well on estate driveways; Beacon Hill Flagstone, which gives walkways and patios a more organic, irregular look; Town Hall pavers, a cleaner rectilinear option for more formal hardscape designs; and Pisa2, a modular retaining wall system that’s well-suited to tiered garden walls and short retaining applications when installed with proper geogrid. We stock Unilock’s own edge restraints and compatible polymeric joint sand locally so we’re not waiting on parts when a Hillsborough project needs to move. Where a base or drainage detail is failing, we repair and rebuild that section honestly rather than upsell a full tear-out that the surface doesn’t need. We also handle Unilock sales & service for clients who want to spec the materials with one contractor and have the work done right the first season.

Unilock Service Pricing in Hillsborough

FAQs – Unilock Construction in Hillsborough

Does a Unilock paver driveway in Hillsborough need town design review?

It depends on the scope. If the project changes grade, runoff patterns, or adds retaining walls, you’ll likely need Hillsborough design review and possibly geotechnical sign-off. We’ve been through the process enough to tell you early whether your project will trigger it and what the reviewers will ask for. Call (833) 589-8103 and we’ll give you a straight answer after seeing the site.

Why do my Unilock pavers shift and settle on a sloped Hillsborough lot?

Nine times out of ten it’s the base, not the pavers. On a sloped lot, water moves through the subgrade and under-compacted aggregate settles, which lets units shift and edges loosen. We excavate to the correct depth, re-compact in lifts, and rebuild the edge restraint so the field stays locked. The units might be fine, the base was the problem.

Can Unilock pavers be used on the hillside retaining walls around my property?

Yes, but the system matters. Pisa2 is well-suited to smaller retaining walls and tiered garden walls on mild to moderate slopes. For walls holding back significant elevation or a lot of water, we’ll spec geogrid reinforcement and proper drainage behind the wall. Skipping those details is how walls bulge and settle. Call (833) 589-8103 and we’ll tell you what your specific slope actually requires.

How does winter rain affect a Unilock patio on my estate lot?

Hillsborough’s wet winters put real pressure on paver flatwork. If the base and drainage details are correct, a Unilock patio shrugs off rain and dries out fine. If the installer didn’t slope the surface or the joint sand was cheap stuff, you’ll see ponding, efflorescence, and shifting units within a season or two. We fix the underlying issue, not just the surface symptom.

Do you use Unilock’s own joint sand and edge restraints, or generics?

We use Unilock’s own units, edge restraints, and compatible polymeric joint sand. Generic substitutes are exactly what let a paver field creep or wash out on a Hillsborough slope. Using the right restraint and sand is a small cost that prevents expensive failures.

Service Areas Near Hillsborough

We serve Hillsborough and the surrounding Peninsula, including Burlingame, Millbrae, San Mateo, and Atherton. We also support clients further south near Watsonville, Pajaro, and Freedom when projects call for it. See our Hillsborough service area page for full details, or check our Unilock service in Burlingame and Unilock service in Millbrae pages for coverage specifics in those cities.

Book Your Unilock Service in Hillsborough Today

If you’re planning a Unilock paver driveway, patio, or retaining wall in Hillsborough, or if an existing installation is shifting, ponding, or washing out, call us. We’ll walk the site, tell you what’s actually wrong, and give you a written line-item quote. Reach (833) 589-8103 to schedule your free estimate.

Written by Glen Sorrento, Owner at Seaside Contractors, serving Hillsborough and the greater Peninsula, including Unilock repair in Highlands-Baywood Park.