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Unilock Construction in Millbrae, CA | Timberline Contractors
Timberline Contractors provides independent Unilock installation and repair across Millbrae, from paver driveways and patios to retaining walls and drainage corrections. We are not an authorized Unilock dealer, which means we specify the right product for your lot without brand pressure. What sets our Unilock work apart in Millbrae is simple: we build every paver and wall system around the city’s strict lot-coverage limits, marine fog, and hillside geotechnical rules that most contractors never mention until something fails. Call (866) 253-5808 to schedule a free estimate.

The short version: if you want Unilock hardscape installed or repaired in Millbrae, we handle the full scope under one contract as your Millbrae General Contractor. Nelson Fung grew up learning materials from his grandfather at the hardware stalls on Broadway in LA’s Chinatown, and he still approaches every paver base, drainage path, and edge restraint with the same question: what will this look like in ten years? Millbrae’s climate answers that question differently than any city on the Peninsula, and we build accordingly.
Why Millbrae Residents Choose Us for Unilock Service
Unilock pavers, retaining walls, and permeable systems are among the best-engineered hardscape products available, but their performance depends entirely on what sits underneath. Millbrae brings two specific challenges. First, the marine fog off SFO creates constant wet-dry cycling that draws salts up through poorly drained paver bases, leaving white efflorescence blooms that look like a product defect. Second, the 1940s and 1960s lots that dominate Millbrae’s housing stock were often graded with undersized drainage, so modern paver systems have to correct what the original construction got wrong.
We know the model lines: Unilock sales & service is something we’ve handled across the Peninsula for years, and we stock OEM-compatible edge restraints, polymeric joint sand, and drainage fabric specific to Brussels Block, Beacon Hill, Bristol Valley, and U-Cara systems. Most Millbrae homeowners call us after a previous install fails: joint sand washes out, edges spall, or a wall block cracks. We fix the system, not just the symptom. Nelson Fung learned the trade formally at Los Angeles Trade-Technical College and spent years on residential and commercial builds before Timberline, which means he can read a failed paver base the way a mechanic reads a worn-out bearing.
Styles & brands we work with







Common Unilock Construction Problems We Solve in Millbrae
- White, chalky efflorescence on Brussels Block and Beacon Hill pavers. Millbrae’s fog pushes moisture into the paver bed, and the wet-dry cycle pulls soluble salts to the surface. It looks like a manufacturing flaw, but it’s almost always a base drainage or sealing issue. We correct the drainage and use the right sealer for marine-air exposure.
- Joint sand washout and edge spalling on flat lots. Many 1940s – 1960s Millbrae properties have original grading that drains poorly or not at all. When pavers are set tight against a slope with no positive drainage, joints erode and edges crack under vehicle or foot load. We regrade, reset the edge course, and re-sand with polymeric material rated for wet conditions.
- Settling and heaving on western hillside pads. If a hillside home in Millbrae skips a geotechnical report and pavers go over a shallow base instead of a pier-supported subgrade, the surface shifts within a season or two. We work with the geotech data and build the base accordingly.
- Face cracking on U-Cara and similar retaining wall systems. When drainage gravel and filter fabric are undersized for Millbrae’s heavy winter rains, water pressure builds behind the wall and cracks the block faces. We rebuild the wall with proper drainage, not just replace the cracked units.
- Failed driveways that pool against the garage. On flat lots with lot-coverage limits, the driveway is often the only surface left to upgrade. If the original slab settled toward the door, water sits against the foundation every winter. We pull it, correct the grade, and rebuild with Unilock pavers that drain properly.
Unilock Service in Millbrae: What Local Conditions Mean for Your Equipment
Millbrae’s western hillsides are landslide-prone slopes that require geotechnical reports and pier foundations before any hardscape goes in. That’s not a suggestion; it’s a permit condition in many cases. But here’s the insight that actually shapes how we build Unilock systems in Millbrae: the city’s strict lot-coverage limits push homeowners to add second stories rather than expand their footprint, which means driveways and patios are often the only outdoor surfaces left to upgrade. When a homeowner off Millbrae Avenue in the 94030 ZIP wants more usable outdoor space, they’re not adding square footage to their lot. They’re replacing a cracked concrete driveway with a Unilock Brussels Block system that reads as a design upgrade and a drainage correction at the same time.
That’s a uniquely Millbrae situation. In neighboring cities with looser coverage rules, a homeowner might pour a new slab or expand a patio. In Millbrae, the hardscape is the project. We plan every Unilock driveway, patio, and wall around the setback lines and coverage math the city will actually approve. It changes how we lay out paver patterns, where we place edge restraints, and how we handle drainage. A contractor who doesn’t know Millbrae’s planning culture will happily sell you a paver system the permit office refuses. We already know where the lines are.
Unilock Models & Products We Service in Millbrae
We install and repair the Unilock lines most common on Peninsula homes: Brussels Block for driveways and front entries, Beacon Hill for patios and walkways, Bristol Valley for larger surfaces and some commercial work, and the U-Cara retaining wall system for sloped lots and terraced yards. Unilock pavers and wall units are the system, so we match the real manufacturer line and use OEM-compatible edge restraints, polymeric joint sand, and drainage components rather than generic substitutes. If a driveway or patio has only isolated spalling or a failed edge course, we repair those sections. Full replacement is only warranted when the base or wall drainage is fundamentally wrong. We keep common polymeric sands and edging in stock for fast turnaround across Millbrae service area jobs, so most repairs don’t wait on a supplier.
See the difference
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AfterUnilock Service Pricing in Millbrae
Costs in Millbrae track with the rest of the Peninsula, but local geotech and drainage work can add to a hillside job. Here’s what we see across our Unilock work:

| Service | Millbrae Price Range |
|---|---|
| Paver Driveway Installation | $7,000 – $18,000 |
| Driveway Replacement | $5,000 – $14,000 |
| Paver Patio Installation | $3,500 – $11,000 |
| Driveway Sealing | $250 – $700 |
What drives the final number: lot slope, whether a geotechnical report was already done, base depth, drainage corrections, and the specific Unilock line you choose. A free estimate includes a site walk, drainage assessment, and a written line-item price. Call (866) 253-5808 and we’ll come out to Millbrae, look at the lot, and tell you exactly what it costs.
Serving Millbrae, CA — Our Local Coverage Area
We’re based in the Millbrae area and know this community well, and we also provide Unilock repair in San Bruno. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Unilock Construction in Millbrae
Yes. Millbrae enforces strict lot-coverage limits that cap how much of your property can be covered by structures and hardscape. Driveways and front entries are generally permitted, but a large backyard patio may push you over the allowable coverage. We check the city’s coverage math before we price anything, so you don’t pay for a design the permit office won’t approve. Call (866) 253-5808 for a free estimate and we’ll walk your lot with the coverage limits in mind.
That white film is efflorescence, and in Millbrae it is driven by marine fog plus wet-dry cycling. Moisture moves through the paver base, dissolves salts, and deposits them on the surface. It is not a manufacturing defect. The fix is correcting drainage, replacing the base if necessary, and applying a sealer rated for marine-air exposure. We see this constantly on Brussels Block and Beacon Hill in Millbrae. Call us for an assessment.
Yes, but only with a geotechnical report and the right subgrade. Western Millbrae hillsides are landslide-prone, and any retaining wall or paver system over a shallow base will shift within a season or two. We build U-Cara and similar wall systems with pier-supported subgrade, proper drainage gravel, and filter fabric sized for the slope. Skipping the geotech report is the most expensive mistake you can make on those lots.
No. Timberline Contractors is an independent construction crew that installs Unilock systems. We are not authorized, sponsored, or warranty-backed by Unilock. We specify Unilock because the product quality is consistent and the model lines suit Peninsula properties, but we work for you, not the manufacturer.
Only if the driveway was built without positive drainage or the wrong joint sand. Millbrae gets serious winter rain, and on flat lots with undersized original grading, water sits and erodes the joints. We rebuild with a positive slope, compacted base, and polymeric joint sand rated for wet conditions. The fix is permanent, not seasonal. Call (866) 253-5808 for a free estimate.
Service Areas Near Millbrae
We serve Millbrae and the surrounding Peninsula communities. If you’re in Unilock service in Burlingame, Unilock service in Hillsborough, San Bruno, or South San Francisco, we run the same crew and the same approach: correct base, proper drainage, real Unilock product matched to the lot.
Book Your Unilock Service in Millbrae Today
We’re scheduling Unilock paver driveway, patio, and retaining wall work across Millbrae and South San Francisco now. Call (866) 253-5808 for a free estimate. We’ll walk the lot, check the drainage, and give you a written price before you commit.
Written by Nelson Fung, Owner at Timberline Contractors, serving Millbrae and the Peninsula.