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Unilock Construction in Redwood City, CA | Daly City Construction
We provide independent Unilock paver, retaining wall, and permeable system installation and repair across Redwood City. What separates our Unilock work here is how we handle the shallow water table that sits just a few feet below many downtown and Mount Carmel lots – because a paver base that isn’t engineered for that groundwater won’t survive two winters of Redwood Creek runoff. Call (866) 505-5254 to schedule a free estimate.
We’ve worked with Unilock sales & service across the Peninsula long enough to know that the product isn’t the weak point. The base under it is. In Redwood City, that base is fighting groundwater from day one. As an independent installer, we’re not tied to any manufacturer loyalty program, which means we specify drainage, aggregate depth, and joint sand based on what your specific lot demands – not what a showroom brochure assumes.
Why Redwood City Residents Choose Us for Unilock Service
Noel Cabrera, our owner, grew up in Daly City’s Westlake district watching postwar tract homes get reframed and re-fixed the right way. He trained in construction technology at City College of San Francisco and spent years on residential and light commercial jobs across San Mateo County before putting his name on this Redwood City General Contractor. When a Redwood City homeowner calls about a heaving paver driveway, he’s thinking about soil saturation, not just the surface units.
That matters because Unilock products behave differently in Redwood City than they do in, say, Menlo Park or San Carlos. The water table here changes everything – and we’ve seen what happens when an installer treats Redwood City like any flat Peninsula lot. We service all four Redwood City ZIP codes: 94065, 94061, 94062, and 94063. One contractor, every phase – from the first base excavation to the final joint sand.
Styles & brands we work with
Common Unilock Construction Problems We Solve in Redwood City
- Efflorescence and salt bloom on Brussels Block and Beacon Hill pavers. Redwood City’s high water table wicks moisture up through the base and joint sand, carrying mineral salts that leave white residue on the paver surface. It’s cosmetic, but on a tumbled Brussels Block driveway in Mount Carmel it makes the whole install look decades older than it is. We clean it, reseal where appropriate, and address the moisture path underneath so it stops returning.
- Base failure and paver heave on cottage-era lots. The original 1920s and 1930s soil under many downtown Redwood City homes was never compacted to modern standards. Add winter runoff from Redwood Creek and you get saturated subgrade that shifts, sinks, and pushes pavers upward. A patch job won’t fix this – it’s a re-base, and we tell owners that before quoting.
- Bulging or tilting Seneca retaining walls. On older Redwood City lots, drainage outlets from original cottage foundations often got buried or redirected when neighbors built infill next door. The water has to go somewhere, and a Seneca wall catches the pressure. We rebuild with proper weep drainage and backfill gravel so the wall isn’t doing a French drain’s job.
- Polymeric joint sand washing out on driveways and patio aprons. During heavy winter storm runoff, especially on slopes toward the Bay side of Redwood City, joint sand erodes fast. Losing the sand means the pavers lose their interlock. We re-sand with a polymer product suited to wet conditions and verify the drainage path before we’re done.
- Discontinued line matching for patio extensions. If your patio was built with a Unilock line that’s since been discontinued, we source a compatible tumbled paver and always lay a visible test panel before committing to the blend. You see exactly what the new section will look like next to the old before any permanent work happens.
Unilock Service in Redwood City: What Local Conditions Mean for Your Equipment
Here’s the thing about Redwood City that most exterior contractors never think through: on many downtown and Mount Carmel lots, the water table sits just a few feet down, and original cottage foundations show water staining from exactly that groundwater. This is not a Menlo Park problem or a San Carlos problem – their lots drain differently, their soil sits higher above the water table, and their original platting didn’t happen along the same flood-prone corridor of Redwood Creek. For Unilock installs, this means an engineered drainage layer is not optional. It means French drains routed to the street, deeper aggregate base, and in some cases sump relief where the subgrade just won’t let water escape. We’ve walked lots in Mount Carmel where you could dig down three feet and watch the hole fill with water from the bottom. Unilock pavers are great units – but they don’t float. The base under them either handles groundwater or it doesn’t.
On a 1920s cottage lot off a Mount Carmel side street, our crew pulled up a heaving Brussels Block driveway and found the original base sitting in saturated clay a few feet above the water table. We excavated deeper, compacted a thicker aggregate base, tied the new base into a French drain routed to the street, and re-laid the Brussels Block over a stabilized bed. The driveway has held through two winters of Redwood Creek runoff without heaving. That’s the difference between a Redwood City install done right and one done to generic specs.
Unilock Models & Products We Service in Redwood City
We work with the full core Unilock residential line: Brussels Block, the tumbled dimensional paver that’s all over the Peninsula’s driveways and walkways; Beacon Hill, the flagstone-style unit that suits Redwood City’s older cottage architecture; the Seneca retaining wall system for terracing and lot-level changes on the hills side; and Turfstone permeable grid pavers for driveways and parking areas where runoff control matters. We stock genuine Unilock units for in-production lines and source compatible tumbled pavers for discontinued blends – always with a test panel before we lay. Our local supplier relationships mean we can often turn around a Redwood City patio repair or driveway extension faster than a homeowner driving to a showroom and back.
See the difference
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AfterUnilock Service Pricing in Redwood City
What you’ll pay depends on the scope, the base condition, and whether drainage work is part of the fix. Here’s where our Redwood City jobs typically land:
| Service | Price Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Driveway Sealing | $250 – $700 |
Every free estimate includes a site walk, a base inspection, and a written line-item quote so you see exactly where the money goes. If your lot sits in the Mount Carmel or downtown groundwater zone, we’ll flag the drainage work upfront – not after excavation starts. Call (866) 505-5254 to schedule yours.
Serving Redwood City, CA — Our Local Coverage Area
We’re based in the Redwood City 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 Redwood City
Heaving on Mount Carmel cottages is almost always saturated subgrade, not a paver defect. The original soil under those 1920s lots was never compacted to modern standards, and Redwood City’s high water table plus winter runoff from Redwood Creek saturates it every winter. Once the clay swells and shifts, it pushes the base upward and the pavers follow. The fix is a re-base with proper drainage – not a surface patch. Call (866) 505-5254 and we’ll dig a test hole to confirm what’s under your driveway.
They can, but only if the base under them is built for Redwood City’s drainage conditions. Unilock Turfstone and other permeable units let water pass through the surface instead of running off it, which reduces storm runoff volume. But on lots with a high water table, permeable pavers still need an engineered aggregate layer and outlet drainage – otherwise the water passes through the pavers and hits saturated soil with nowhere to go. We design permeable installs to work with the lot’s groundwater reality, not against it.
Most Redwood City retaining walls over three feet in height, and any wall showing structural distress, will need an engineer’s sign-off before rebuild. That’s true across most San Mateo County jurisdictions, not just Redwood City. We coordinate with the engineer, pull permits, and build the rebuilt wall with proper weep drainage and backfill so the next wall doesn’t inherit the same hydrostatic pressure problem. Estimates for the rebuild itself are free.
Efflorescence is mineral salt bloom – moisture moves up through the base and joint sand, carries dissolved salts to the surface, and leaves the white deposit when the water evaporates. In Redwood City, the shallow water table supplies the moisture. Cleaning removes the bloom, but if the moisture path is still active, it will return. That’s why we address the base drainage, not just the surface, when efflorescence is the complaint. A sealed surface without a fixed moisture path just traps the problem.
Sometimes. If the original line is still in production, we source genuine Unilock units in the same color range and lay a visible test area before the full extension. If the line is discontinued, we source a compatible tumbled paver and blend it with the existing course – again, with a test panel first. Stance on this: we’ll never promise a perfect invisible match on a discontinued line. You’ll see the blend before it’s permanent, and if it’s not acceptable, we’ll tell you what your other options are. Call (866) 505-5254 for a free look at your existing install.
Service Areas Near Redwood City
Alongside our Redwood City service area, we cover Daly City, Broadmoor, Colma, Brisbane, Visitacion Valley, and Noe Valley. We also extend Unilock service to Unilock service in Emerald Lake Hills and Unilock service in Woodside, where hillside drainage and slope stability add another layer to paver and wall work.
Book Your Unilock Service in Redwood City Today
Tell us what the house needs, not what you think it needs – then we’ll figure out the right fix. Call (866) 505-5254 to schedule your free estimate for Redwood City Home Remodeling at your property.
Written by Noel Cabrera, Owner at Daly City Construction, serving Redwood City and the wider Peninsula.