Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterUnilock Construction in San Francisco, CA | Rowan Construction Group
Rowan Construction Group provides independent Unilock installation, repair, and replacement across San Francisco. We work on Unilock paver driveways, patios, walkways, and retaining walls in nearly every neighborhood, from the slopes of Noe Valley to the flats of the Sunset. Unlike a generic paver company, we understand how San Francisco’s seismic activity, marine fog, and strict permitting rules interact with Unilock’s specific product requirements. If your Unilock surface is shifting, scaling, or losing joint sand, call (470) 298-9650 for a written estimate.
Why San Francisco Residents Choose Us for Unilock Service
Grant Rowan, our owner, trained in construction technology at Los Angeles Trade-Technical College, where the coursework covered concrete, framing, and project estimating before he ever took on a paying job. That estimating discipline stuck. Since 2007, we have put the price in writing before any work starts, and we have kept project costs within a few percent of the agreed number across more than 4,000 projects. That matters when you are quoting our Driveway & Pavers in San Francisco using Unilock on a 30% grade in Cole Valley.
We install and repair Unilock systems with the brand’s specific requirements in mind: proper base depth, edge restraint methodology, and jointing compounds that hold up to heavy winter rain. We are an Unilock sales & service provider in the independent sense. We buy directly from distributors and install to Unilock’s technical specs, but we are not manufacturer-authorized, and we will tell you plainly when a repair makes more sense than a full replacement. Most companies will sell you a new patio. We will tell you when your existing one can be salvaged and re-laid.
Common Unilock Construction Problems We Solve in San Francisco
- Edge restraints failing on hillside driveways. San Francisco’s steep lots put constant lateral pressure on paver edges. When the original plastic or aluminum edging fails, pavers drift outward at the perimeter, and the whole surface starts to separate. We remove the affected border, reset the edge with a reinforced restraint keyed for slope stability, and re-compact the base before relaying the pavers.
- Settlement over unstable bay fill. In neighborhoods like the Marina and South of Market, the soil underneath a paver installation is often loose bay fill or fill over old marshland. Without proper geotechnical preparation, pavers settle unevenly within the first few wet seasons. We re-grade the sub-base with crushed rock designed for load distribution and drainage, then relay the Unilock units on a compacted stone bed.
- Efflorescence and surface scaling in fog zones. The Sunset and Outer Richmond sit in marine fog for much of the year. Moisture wicks through Unilock concrete pavers and carries mineral salts to the surface, leaving a white powder called efflorescence. Left unaddressed in a damp climate, scaling follows and the paver face degrades. We clean the surface with the right dilution for the product, then recommend a breathable sealer appropriate for coastal exposure.
- Joint sand loss and weed intrusion after winter rains. Original polymeric sand breaks down over time, especially under San Francisco’s heavy rain cycles. Once the joints open, water gets under the pavers, weeds take root, and the surface loses its structural lock. We remove the spent sand, inspect the base for washout, and refill with Unilock’s jointing compound or a premium polymeric alternative that sets harder in wet conditions.
- Rutting and uneven paver surfaces at garage approaches. The weight of a car entering and exiting a driveway focuses load on a small area. If the base was underbuilt, pavers near the garage compress into ruts. We excavate the failed section, rebuild the base to a depth appropriate for vehicle traffic, and replace any cracked units with matching Unilock pavers.
BeforeAfterUnilock Service in San Francisco: What Local Conditions Mean for Your Equipment
San Francisco’s Department of Building Inspection requires permeable paver systems for new or expanded hardscape exceeding 500 square feet when the project triggers a stormwater management review under the city’s Stormwater Management Ordinance. That rule exists because the city’s combined sewer system gets overwhelmed during heavy rainfall, and impermeable surfaces make the flooding worse. For a homeowner planning a large paver driveway in the Richmond or a broad patio in Glen Park, this changes the material conversation. Unilock’s permeable product line, Eco-Priora, is engineered with widened joints that let stormwater pass through to the sub-base, and it is one of the few Unilock lines that satisfies the city’s stormwater review criteria. A contractor who does not know this ordinance might quote you a standard Unilock Brussels Block installation, pull the permit, and find the DBI rejecting the plan. We scope for the regulation before we write the estimate, because Clause 1 of our process is a written price before anyone starts work, and that price has to reflect the actual job, not a guess.
Grant Rowan grew up in the Crenshaw district of Los Angeles, watching the neighborhood cycle through neglect and renovation in rough measure. He has spent two decades working residential and light commercial projects across Los Angeles County before bringing that same documentation-first approach to San Francisco. Measure twice, say it once, show your work. That is how we bid, and it is how we build.
Unilock Models & Products We Service in San Francisco
We install and handle Unilock repair in Oakland and the full range of Unilock concrete pavers and retaining wall units, including Brussels Block, Town Hall, Richcliff, and Lineo Dimensional Stone. For partial replacements, we source genuine Unilock units to ensure color and dimensional match. Batch variations show when you mix in a different manufacturer’s paver, and most San Francisco homeowners can spot the mismatch from the sidewalk. For older or discontinued Unilock lines, we salvage and re-lay existing units where structurally sound. Full replacement gets recommended only when the base has failed or the pavers show widespread cracking that would make patching uneconomical. We do not sell you what does not need replacing.
Unilock Service Pricing in San Francisco
Cost depends on square footage, access, base condition, and the specific Unilock product. Here are the line items we quote most often for San Francisco projects:
| Service | Price Range |
|---|---|
| Paver Patio Installation | $4,130 – $12,980 |
| Paver Driveway Installation | $8,260 – $21,240 |
| Driveway Replacement | $5,900 – $16,520 |
Your free estimate includes a written scope, a flat price, and a written warranty. No change proceeds without a signed change order, and every visit includes a documented photo record. Call (470) 298-9650 to schedule yours.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco area and know this community well, and we also offer Fence Installation in San Francisco. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Unilock Construction in San Francisco
Yes. San Francisco is in seismic zone 4, and pavers installed on hillside lots or over fill soils need a deeper, better-compacted base than flat-grade installations in other cities. We key the crushed rock sub-base for slope stability and use edge restraints that tolerate minor ground movement without failing. Call (470) 298-9650 if you want us to assess your existing base before you spend on new pavers.
It depends on the total hardscape area and whether your project crosses the city’s stormwater review threshold. If the new or expanded hardscape exceeds 500 square feet, the DBI’s Stormwater Management Ordinance may require permeable paving. A small patio under that threshold often moves through as over-the-counter work. We scope for the trigger on the first site visit so you know which path you are on. Estimates are free.
That white powder is efflorescence, mineral salts wicking through the concrete and crystallizing on the surface. In the Sunset’s persistent marine fog, it shows up faster and heavier than in drier parts of the city. It is not structural damage, but if ignored, the trapped moisture leads to surface scaling. We clean it with a product-safe dilution and apply a breathable sealer suited to coastal exposure. Call (470) 298-9650 for a written quote.
That pattern points to an underbuilt base at the point of highest load. The Marina sits on loose bay fill, and when a vehicle’s weight concentrates at the garage approach, the pavers compress the underlying soil into ruts. We excavate the failed section, rebuild the base to a vehicle-grade depth, and relay the Unilock units. Patching only the surface does not fix the base, and the sinking returns within a year or two.
We can come close. Ten-year-old pavers have weathered, and even the same product line from the same manufacturer will show slight color variation from the original batch. We source current Unilock Town Hall units and, where possible, blend salvaged units from the existing installation along the transition so the difference reads as natural. A perfect match is not possible with decade-old concrete. A good blend is. Call (470) 298-9650 and we will show you samples against your patio before quoting.
Service Areas Near San Francisco
We serve the full San Francisco service area, including Noe Valley, the Sunset, the Richmond, the Marina, SoMa, Twin Peaks, and Glen Park. For Unilock work in other regions, see Unilock service in Fort Worth and Unilock service in Fresno.
Book Your Unilock Service in San Francisco Today
We have been delivering written prices before work starts since 2007. That is the deal. Call (470) 298-9650 to schedule your free Unilock estimate in San Francisco, and we will walk the site, document what we find, and put the number in writing.
Written by Grant Rowan, Owner at Rowan Construction Group, serving San Francisco since 2007.