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Unilock Construction in Hillsborough, CA | Milpitas Construction
We provide independent Unilock paver and retaining-wall construction across Hillsborough, CA, from driveway base rebuilds on old fill benches to Pisa2 retaining systems on steep lots, with Unilock repair in Highlands-Baywood Park available nearby. What makes our Unilock work different here is sequencing: we pull geotechnical and arborist input before we excavate, because Hillsborough’s hillside soils and tree ordinance don’t forgive guesswork. Call (877) 752-4194 for a free estimate on Unilock paver driveways, patios, and retaining walls in Hillsborough.
Why Hillsborough Residents Choose Us for Unilock Service
We’re a full-scope general contractor that installs Unilock sales & service pavers and retaining-wall systems the way the manufacturer specs them, not the way a flat-lot crew might improvise. Hillsborough is not flat-lot work. The lots here climb, and the soil underneath them shifts.
Ken Stafford, owner at Milpitas Construction, has spent two-plus decades on Bay Area residential builds and remodels, including ground-up work where the terrain fought back. That background matters when a Unilock paver driveway on a Hillsborough hillside needs a base course that won’t creep downhill after two wet winters. We use Unilock’s own system components – Pisa2 units, compatible edge restraints, manufacturer bedding – where the wall or driveway is structural, and quality aftermarket geogrid, drainage aggregate, and polymeric joint sand for the hidden layers. Ken’s rule from his job-site days: build it right the first time, because the Bay Area doesn’t give you a free pass on shortcuts.
We’re not Unilock-authorized. We’re an independent contractor that knows their product lines well enough to specify the right system for a hillside grade and slope-movement exposure. That independence lets us be honest about what needs replacing and what can be rebuilt.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Hillsborough
- Paver settlement and edge creep on old fill benches. Above the Burlingame line, graders and contractors routinely deal with old landslides and fill soils. A Unilock driveway or patio laid over uncompacted fill can lip and trip-edge after one wet winter. We rebuild the base, not just the surface.
- Drainage failure at the base course. When hillside runoff isn’t intercepted, water sheets under the bedding sand, pumping fines and rutting the surface. Hillsborough’s winter storms make this the most common Unilock failure we see.
- Wall-face staining and efflorescence on Pisa2 units. A hillside retaining wall built without proper weep and backfill drainage stains and effloresces as storm runoff pushes minerals through the face. The fix is drainage, not scrubbing.
- Heritage-tree root damage. Oak and redwood roots heave pavers when the tree-protection setback was never coordinated before base excavation. Hillsborough’s tree ordinance makes this a permit-level issue, not a cosmetic one.
- Under-designed retaining systems. If Unilock units are sound but the wall wasn’t engineered for the slope load, we recommend re-engineering rather than patching the face. Patching a hillside wall is paying twice for the same failure.
Unilock Service in Hillsborough: What Local Conditions Mean for Your Equipment
Hillsborough’s tree ordinance protects heritage oaks and redwoods, and its hillside streets sit on old landslide and fill soils. That combination means a Unilock paver driveway or patio here can require an arborist report plus geotech sign-off before the base is excavated. Unilock in Burlingame on flat lots don’t carry that burden. On a steep lot off the hillside streets above the Burlingame line, a homeowner wanted a Unilock Brussels Block driveway over an old fill bench that had crept downhill after a wet winter. We pulled geotech and arborist input first to keep the heritage oaks out of the excavation, then rebuilt the base with geogrid and interception drainage before relaying the Brussels Block. The driveway has held grade through two storm seasons and the oak-root zone was never cut. That’s the sequencing a generic Unilock page never addresses, and it’s the difference between a driveway that lasts and one that becomes a trip hazard by spring. In Hillsborough, the geotech report isn’t paperwork. It’s the first material on the job.
Unilock Models & Products We Service in Hillsborough
We install and service the Unilock lines most common on Hillsborough estates: Brussels Block for driveways that need a classic cobble look with structural integrity, Beacon Hill Flagstone for patios and walkways, Umbriano for a smoother contemporary finish, and Pisa2 for hillside retaining walls. For structural walls and driveways, we stick with Unilock’s own system components – Pisa2 units, compatible edge restraints, and manufacturer bedding. For the hidden layers, we specify aftermarket geogrid, drainage aggregate, and polymeric joint sand that hold up to Hillsborough’s runoff. We don’t stock every Unilock line in a yard; we order what the job needs and stage it locally for Hillsborough delivery. That keeps lead times short and keeps material choices specific to the lot.
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AfterUnilock Service Pricing in Hillsborough
Unilock paver work in Hillsborough costs what the base preparation demands. A flat patio over solid soil is one thing; a hillside driveway over old fill with drainage interception is another. Here’s what we quote:
| Service | Price Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Home Addition | $45,000 – $130,000 |
What drives cost here is what’s under the pavers: excavation depth, geogrid reinforcement, drainage interception, and whether an arborist report is required for protected trees. We quote line items, not lump sums, so you see exactly where the money goes. Call (877) 752-4194 and we’ll walk your Hillsborough lot and give you a number that holds.
Serving Hillsborough, CA — Our Local Coverage Area
We’re based in the Hillsborough area and know this community well, and we also provide Unilock service in San Mateo. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Hillsborough
Yes, if the base is engineered for slope load and drainage is intercepted before water gets under the bedding sand. We don’t lay Unilock pavers on a steep Hillsborough grade without geogrid reinforcement and a geotech review when the lot shows fill or landslide history. Call (877) 752-4194 for a site assessment.
Yes. Hillsborough protects heritage oaks and redwoods, and excavation near protected trees can require an arborist report before permits are issued. We coordinate the arborist and the geotech so the tree protection zone is set before the base is excavated. That sequencing keeps the install moving once the permit clears.
Almost always, it’s a base course failure – either uncompacted fill or drainage that wasn’t intercepted at the uphill edge. Hillsborough’s winter runoff sheets under the bedding sand, pumps fines out, and ruts the surface. The fix is rebuilding the base with drainage, not re-screeding sand on top. Call (877) 752-4194 for an honest look at what’s under your pavers.
Pisa2 can be the right choice if the wall height and slope load are within the system’s engineering limits, and if the backfill and weep drainage are done correctly. On a Hillsborough hillside, we verify the load before we spec the wall. If the wall is under-designed for the grade, we’ll tell you before we build it. Estimates are free – call (877) 752-4194.
Yes. We run Unilock paver driveways, patios, and retaining walls within the same permit scope as a Hillsborough home addition or remodel, so you get one point of contact instead of separate contracts. That matters when the geotech and arborist reports have to be filed together. Call (877) 752-4194 and we’ll map the whole scope.
Service Areas Near Hillsborough
We also serve Unilock construction projects in nearby communities including Unilock service in Half Moon Bay and Unilock service in San Martin, plus Marin City, Castroville, and Prunedale. If you’re in Hillsborough’s 94010 ZIP or just outside it, we’ll come take a look. Full service area details are on our Hillsborough service area page.
Book Your Unilock Service in Hillsborough Today
Call (877) 752-4194 to schedule a free estimate on Unilock paver driveways, patios, and retaining walls in Hillsborough. We’ll walk the lot, check what’s underneath, and give you a line-item quote that holds. Don’t wait for the next storm to find out what your base course is doing.
Written by Ken Stafford, Owner at Milpitas Construction, serving Hillsborough since the day he first set a grade stake on a hillside lot and watched the soil do what soil does.