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Unilock Construction in Los Altos, CA | San Mateo Construction
We provide independent Unilock hardscape construction and repair across Los Altos, from paver driveways on clay-heavy lots to retaining walls that have to hold up to winter rain and tree roots. If you need Unilock service in Los Altos Hills, we can handle that too. The thing that makes our Unilock work here different is that we plan it around how Los Altos actually builds: tear-downs, second-story additions, and backyard ADUs, where hardscape is usually designed into the site plan before anyone pulls a permit. Call (855) 901-7266 to talk through your project, and we’ll tell you honestly whether it’s a repair or a rebuild.
Why Los Altos Residents Choose Us for Unilock Service
We’ve set Unilock pavers and retaining walls through dozens of Los Altos rebuilds and ADU projects, which means we know how Pasadena, Beacon Hill, and Brussels Block actually behave on clay-heavy hillside lots after a wet winter. That’s not theoretical knowledge. It comes from pulling up failed bases, looking at what the water did, and redoing it so it stays flat.
We are an independent installer, not authorized, sponsored, or warranted by Unilock, so our loyalty is to the grade, base, and drainage detail that keeps the installation level, not to a dealer program. Noel Carrington, our owner, grew up pouring concrete footings with his father in San Mateo, studied construction technology at Skyline College, and has spent three decades on residential jobs across San Mateo County. He brings that same eye to every paver we set through our General Contractor in Los Altos operations. When you work with us, you get one contractor who knows the material and the soil it sits on.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Los Altos
- Efflorescence and salt bloom on Brussels Block and Pasadena pavers. Los Altos winters sheet rain off hardpan clay instead of letting it drain, so water sits in the base layer and wicks up through the paver face as white mineral deposits. We correct the drainage that caused it, then clean the surface without etching the paver.
- Polymeric sand washout at driveway aprons and patio edges. When a base gets compacted over expansive clay without a proper aggregate sub-base, the joints flex and the sand crumbles out. We see this on older Los Altos ranch homes where the original hardscape was set decades ago, usually with no edge restraint to speak of.
- Paver heaving and lippage along tree-root zones. Mature oaks and redwoods near the hillside edges of Los Altos keep growing under the bedding layer. Within a season or two, roots lift pavers and create a trip hazard. We re-grade the base, hand-dig around roots where we can, and set a deeper compacted aggregate layer.
- U-Cara wall block settlement and face cracking. On sloped lots, we find walls built without geogrid or drainage gravel. Water builds up behind the block, freezes nothing (Los Altos barely gets hard freeze) but saturates the soil, and the wall starts to lean or crack at the face. We rebuild these with proper drainage and reinforcement.
- Failing bases from the original 1950s-60s construction. A lot of what we see in Los Altos wasn’t built for today’s vehicle loads or drainage standards. Shallow bases, no geotextile, no aggregate. We solve it by rebuilding from sub-grade up.
Unilock Service in Los Altos: What Local Conditions Mean for Your Equipment
Here’s the thing about Los Altos that shapes how our Home Remodeling in Los Altos and Unilock work actually plays out here. Because so much construction work in this town is tear-down-and-rebuild and ADU construction reviewed by a patient, resident-heavy design process, paver hardscape here is usually designed into the site plan alongside the new foundation and grading, not added later as an afterthought. That means our Unilock scope often has to be coordinated with arborist tree-protection zones before any excavation starts. On a rebuild off University Avenue near downtown, the owners wanted a Pasadena Block driveway apron and a Beacon Hill Flagstone patio tying into their new ADU, but the rear lot line sat inside the protected root zone of a mature oak. We brought the excavation line back, hand-dug around the roots, and set the Unilock on a deeper compacted aggregate base with a drainage strip. Two winters later, the flagstone is still flat with no heaving. That’s the kind of coordination a generic hardscape crew doesn’t think about until the city’s arborist tells them to stop digging.
Unilock Models & Products We Service in Los Altos
We work with the Unilock product lines that show up most often in Los Altos: Brussels Block for ranch-era entries and walkways, Pasadena Block for driveway aprons where the aged tumbled look fits the neighborhood, Beacon Hill Flagstone for patios and pool decks, and the U-Cara Multi-Face Wall System for segmental retaining walls on sloped lots. When a repair calls for replacement units, we order Unilock’s own matching units, caps, and corner pieces so the coursing and color stay consistent. For base and joint work, we source compatible aggregate and polymeric sand from quality suppliers, not the cheapest bag on the shelf. If you’re at the start of a project, we’ll help you choose the right paver for how your lot drains and how you actually use the space.
See the difference
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AfterUnilock Service Pricing in Los Altos
Los Altos pricing for Unilock hardscape depends mostly on access, base depth, and how much root work is involved. A flat, open driveway costs less than one on a hillside with oak roots running through the dig zone. The table below gives you our market-calibrated ranges for the Unilock work most Los Altos homeowners ask us about. A free estimate includes a site visit, a base and drainage assessment, and a written line-item quote, so you know exactly what the work costs before we start. Call (855) 901-7266 to schedule yours.
| Project Type | Price Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
Serving Los Altos, CA — Our Local Coverage Area
We’re based in the Los Altos area and know this community well, and we also provide Unilock service in Stanford. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Los Altos
Yes, but the base design has to account for the clay. On clay-heavy lots, we excavate deeper than the usual 6 inches, lay a geotextile separator, build a compacted aggregate sub-base, and make sure the finished grade slopes away from the house so winter rain can’t pond under the pavers. Skip any of that and the driveway will heave within a couple of seasons. Call (855) 901-7266 and we’ll walk your lot before you spend a dollar.
Yes, often. If your lot backs onto mature oaks or redwoods, especially in the hillside-adjacent edges of Los Altos, the city’s tree-protection rules may require an arborist report and restrict excavation within the protected root zone. We coordinate that review with your hardscape plan before we dig, and we adjust the base and drainage design to work around the roots rather than through them.
Los Altos runs a deliberate, design-review-driven permitting process, so even a paver driveway or retaining wall can take longer to get approved than you’d expect in a neighboring city. We plan for that from the start. We pull permits, submit the drawings, and stay patient through the review so your project doesn’t stall at the last step. Our job is to handle the paperwork, not to rush you through it.
Yes, efflorescence shows up on Brussels Block and Pasadena pavers when the base holds water rather than draining it. In Los Altos, winter rain sheets off hardpan clay, and that trapped water wicks up through the paver face as a white mineral bloom. We fix the drainage that caused it, then clean the pavers with the right method for the surface, so the bloom clears without etching the concrete. Call (855) 901-7266 for an exact diagnosis and a quote to fix it properly.
Isolated cracked or heaved pavers get lifted and re-set, with fresh bedding sand and joint material. A patio whose base has failed gets rebuilt from sub-grade up, because re-sanding a bad base just buys one more winter. We’ll tell you which one you have after a site visit, and we won’t push a rebuild that a repair will solve.
Service Areas Near Los Altos
We run Unilock service throughout the mid-Peninsula. If you’re in San Mateo, Burlingame, Highlands-Baywood Park, Foster City, Hillsborough, or Belmont, we can usually schedule your estimate the same week. We also handle Unilock work in Mountain View and Loyola, where the lots and drainage patterns are different enough that we plan accordingly. For the full picture of where we work, see our Los Altos service area page.
Book Your Unilock Service in Los Altos Today
If you’re planning Unilock hardscape as part of a rebuild, ADU, or addition in Los Altos, let’s talk before the plans get finalized. The earlier we’re involved, the better the drainage and base details work out. Call (855) 901-7266 to schedule a free estimate, and Noel or our team will walk the site with you. We’re also your source for broader Unilock sales & service support across the Peninsula.
Written by Noel Carrington, Owner at San Mateo Construction, serving Los Altos and the mid-Peninsula since the 1990s.