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Unilock Construction in Los Altos Hills, CA | Millwright Builders
Unilock paver work in Los Altos Hills runs $7,000 – $18,000 for a typical driveway and $3,500 – $11,000 for a patio, but the number that actually matters on a one-acre hillside lot is what’s happening under the pavers. We’re Millwright Builders, an independent Unilock service provider serving Los Altos Hills homeowners, not a manufacturer affiliate or authorized dealer. What makes our Unilock work different here is simple: we sequence base prep and drainage around the town’s well, septic, and fire-safety permitting, because on these lots the paperwork shapes the excavation as much as the grade does. Call (866) 925-0334 for a free estimate on any Unilock driveway, patio, or Unilock repair in Loyola.
Why Los Altos Hills Residents Choose Us for Unilock Service
We’ve installed Unilock in Stanford and on steep, fire-prone Los Altos Hills lots long enough to know that a spec-sheet base fails here. The town’s decomposed granite and clay interface behaves differently than the flat, municipal-service subdivisions most paver contractors cut their teeth on. Our crew reads Unilock technical bulletins and then adjusts for what the geotechnical report actually says about your hillside. Noel Castañeda, our owner, trained at Skyline College and spent two decades on Peninsula residential and light commercial work before founding Millwright Builders, so he treats base prep as a structural decision, not a guess. We specify the brand, explain the trade-off, and stand behind the install. That means genuine Unilock pavers, matching edge restraints, and aggregates chosen for how Los Altos Hills soil drains, not what’s cheapest on the pallet.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Los Altos Hills
- Shifting and rutting on sloped driveways. Winter rains saturate hillside soils, and where the compacted base wasn’t engineered for the decomposed granite and clay interface common in Los Altos Hills, Unilock pavers start to drift and rut within a season or two. We see it most often on steeper private lanes, where runoff concentrates along the paver edge and eats the base from underneath.
- Joint sand loss and paver movement on patios. One-acre-plus lots in Los Altos Hills often have unlined swales that cross the hardscape when it rains. Without a proper edge restraint, water pushes the joint sand out and the pavers follow. A patio that looked flat in August can look like a riverbed by February.
- Surface staining and color fade from well-water overspray. Lighter-toned Unilock lines like Umbriano pick up mineral staining fast when irrigation draws from a private well. Add wildfire-season ash settling on the surface and many owners mistake the discoloration for product failure. It’s usually water chemistry, not the paver.
- Efflorescence and freeze-thaw spalling on north-facing terraces. Where Unilock pavers meet retaining walls on shaded hillside terraces, moisture lingers. The base course stays damp longer, and efflorescence blooms white across the surface. Over enough wet-dry cycles, spalling starts at the paver edges.
- Drainage failures under driveways on private roads. Los Altos Hills properties sit on private roads with no municipal storm drain to carry runoff. When a paver driveway isn’t graded to shed water toward a swale or infiltration area, the base gets undermined and the whole run fails. The paver pattern is the last thing to blame.
Unilock Service in Los Altos Hills: What Local Conditions Mean for Your Equipment
Here’s what a generic Unilock page will never tell you: because Los Altos Hills properties are on private roads and wells, a paver driveway or patio project often needs a percolation test and water-supply verification before the town will issue a permit. That step surprises contractors used to municipal sewer and water, and it directly shapes how we sequence your Unilock job. You can’t just mark the paver layout and start cutting. The percolation test determines where water is allowed to go, which determines where the base excavation stops and the drainage swale begins. On a steep private lane off La Barranca Road, our crew replaced a rutted Brussels Block driveway where hillside runoff had undermined the base. We re-graded to shed water toward a new swale, rebuilt the base with compacted aggregate, re-laid the Unilock pavers with fresh edge restraint, and the owner had a stable, fire-safe access route before the next rainy season. That sequencing, permit approvals first, excavation second, paver layout third, is the difference between a driveway that lasts and one that’s back on our schedule in eighteen months.
Unilock Models & Products We Service in Los Altos Hills
We work with the full range of Unilock paver lines common in Los Altos Hills, including Brussels Block, Beacon Hill, Umbriano, and Town Hall. For repairs, we source genuine Unilock pavers and matching edge restraints so color and thickness match the original run. Where a quality aftermarket product outperforms the OEM accessory, we say so: we use aftermarket polymeric sands and base aggregates chosen for hillside drainage, not brand loyalty. If the failed area is isolated and the base is sound, we repair. If the base or grading is the problem, we tell you replacement is the honest call. Call (866) 925-0334 to schedule a free estimate, and visit our Unilock sales & service page to learn more about how we approach the brand across the Peninsula.
See the difference
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AfterUnilock Service Pricing in Los Altos Hills
What you’ll pay depends on three things: the square footage, the slope, and whether the existing base can be salvaged. Here’s what we typically see in Los Altos Hills:
| Service | Typical Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Driveway Replacement | $5,000 – $14,000 |
Steeper lots cost more because the base prep and drainage work get heavier. Permits and perc tests add to the timeline, not the paver cost itself. A free estimate from us includes a written line-item quote, so you’ll see exactly where the money goes before any work starts. Call (866) 925-0334 for an exact number from your Los Altos Hills General Contractor, it won’t cost you anything to find out.
Serving Los Altos Hills, CA — Our Local Coverage Area
We’re based in the Los Altos Hills 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 Los Altos Hills
Yes, in most cases. Because Los Altos Hills properties rely on private wells and septic systems, any new driveway or significant patio addition triggers a percolation test and water-supply verification before the town will issue a permit. We sequence our excavation and drainage design around those approvals so the project doesn’t stall. Call (866) 925-0334 and we’ll walk you through what your specific property is likely to need.
Unilock pavers hold up well on slopes when the base is engineered for the grade and the drainage is handled correctly. What fails is the base, not the paver. Los Altos Hills’ decomposed granite and clay interface, plus winter saturation, means a generic compacted base will shift and rut within a season or two. We build bases that account for the hillside’s actual soil behavior, not a flat-lot spec sheet.
Yes. We source genuine Unilock pavers in the same color and thickness as your original run, including Brussels Block and Beacon Hill. Color matching on older installations can take a little extra sourcing, but we’d rather get it right than hand you a patch that looks like a patch. Call (866) 925-0334 with the model and approximate install year, and we’ll give you an honest read on the repair.
It can. Los Altos Hills sits in the Santa Cruz Mountains foothills with hot, dry summers, and wildfire-season restrictions on grading and power tools can push paver installation windows around. We plan project schedules around those restrictions and front-load the permit and excavation work when possible. The paver installation itself is not the bottleneck; the site access rules are.
Efflorescence is water moving through the paver and carrying mineral salts to the surface, where they dry as a white bloom. In Los Altos Hills, north-facing hillside terraces that stay damp longer, plus well-water irrigation overspray, make it more common than on flat, sunny lots. It’s a moisture issue, not a manufacturing defect, and it can be managed with proper base drainage and water treatment. Call (866) 925-0334 for an inspection and an exact quote, estimates are free.
Service Areas Near Los Altos Hills
We serve Los Altos Hills and the surrounding Peninsula communities, including Los Altos Hills service area, Unilock service in Los Altos, Unilock service in Mountain View, and parts of South San Francisco, San Bruno, and Millbrae. Wherever the job is, the same rules apply: build it right the first time, the Peninsula weather will find out if you didn’t.
Book Your Unilock Service in Los Altos Hills Today
We work on one-acre hillside lots because that’s where the real problems show up, and we’ve learned what those lots demand. If your Unilock driveway is rutting, your patio is losing joint sand, or you’re ready for our Home Remodeling in Los Altos Hills to include a new paved surface that handles drainage the right way, call us at (866) 925-0334 to schedule your free estimate. One contractor, one conversation, from the base up.
Written by Noel Castañeda, Owner at Millwright Builders, serving Los Altos Hills and the surrounding Peninsula communities.