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AfterSilestone Home Additions & ADU: The Los Angeles Owner's Guide
If you're planning an addition or ADU in Los Angeles and want Silestone quartz as your countertop surface, the installed cost typically lands between $53,100 and $153,400 for the full project, with the Silestone countertop portion running $2,360 to $7,670 depending on square footage and edge profile. We're an independent remodeling company, not affiliated with Silestone, but we install their quartz on additions and ADUs across Los Angeles every month. Most owners discover they need Silestone-specific planning help when they realize their existing countertop won't match the new space, or when they're told by another contractor that their slab selection won't arrive in time for the inspection.
Which Silestone Models This Applies To
This applies to every Silestone quartz line we regularly install in Los Angeles: the Eternal series, the Loft series, and the Sunlit Days collection are the three we see most often on home additions and ADUs. Identifying your exact Silestone color and finish matters more than the series name. Look at the underside of your existing slab or your original order paperwork. You'll find a color code like "Calacatta Gold" or "Iconic White" with a finish designation, either polished, suede, or volcano. Here's the compatibility gotcha most homeowners run into in Los Angeles: Silestone finishes from the same color family do not match across batches. The polished version of Eternal Statuario looks noticeably different from the suede version, and a slab cut in 2022 will not sit seamlessly next to a slab cut in 2025. If you're matching an existing kitchen countertop into a new ADU kitchen, you need to verify the batch code with your supplier before we template. For OEM versus aftermarket, there is no aftermarket equivalent for Silestone quartz. You're buying the real slab or you're not. What you can choose is the fabricator. That's where price and consistency live or die in Los Angeles.
Signs Your Silestone Home Additions & ADU Plan Is Failing
- Your contractor can't confirm slab availability before demo. Silestone slabs are stocked in regional distribution centers, not local yards. A contractor who hasn't called the distributor can't promise a timeline. In Los Angeles, popular colors sell out for weeks at a time.
- The quoted countertop price is a single number with no slab, fabrication, or install breakdown. Silestone pricing is not flat. Thickness (2cm versus 3cm), edge profile, and cutout count all move the number. If you can't see the line items, the number will change.
- Your ADU kitchen layout calls for a seam in a high-traffic area. Silestone slabs come in standard sizes. A peninsula longer than the slab forces a seam. Planned poorly, that seam lands where you prep food every day.
- The template appointment keeps getting pushed. Template is the measurement visit that locks your fabrication order. Delays here push the whole project. In Los Angeles, a delayed template can cost you three weeks.
- Nobody has mentioned the overhang support requirement. Silestone quartz needs proper support for any overhang beyond 12 inches. Missing corbels or brackets means a cracked slab six months after move-in.
Replacement Cost & What's Included
For a Los Angeles home addition or ADU, the full project range of $53,100 to $153,400 covers everything from foundation to finish, with the Silestone countertop work falling between $2,360 and $7,670. What drives the countertop number: square footage, slab thickness (3cm costs more than 2cm but requires less substrate work), edge profile (eased edge is standard, waterfall or mitered edges add labor), and cutouts for sinks and cooktops. Our written quote breaks all of this down line by line before any work starts. You see the slab cost, the fabrication cost, and the installation cost as separate items. The 365-Day Done Right Promise covers the installation. If a seam fails, if the slab cracks from an installation error, if the overhang support shifts, we come back and fix it at no charge. That's in writing.
DIY or Call Us?
You can check a few things yourself before calling. Measure your existing countertop footprint. Look at your current slab underside for the color code and finish. Check your ADU plans for peninsula and island dimensions that exceed 132 inches, which is where Silestone's standard slab lengths start requiring seams. What you should not do is attempt to move, cut, or set a Silestone slab yourself. A full 3cm quartz slab weighs over 600 pounds. Improper lifting cracks the slab and injures people. Quartz fabrication requires water-fed diamond tooling; a circular saw with a masonry blade destroys the edge and voids the Silestone warranty. This is not the project to test your DIY limits on. Call us at (936) 259-2607 and we'll walk you through what your addition or ADU actually needs, including a written price before any tools come out.
FAQs
Silestone quartz carries a 25-year limited warranty from the manufacturer, and in a Los Angeles ADU you can expect 20 to 30 years of daily use before visible wear becomes a factor. The bigger risk in Los Angeles is UV exposure. If your ADU kitchen gets direct afternoon sun through a west-facing window, lighter Silestone colors can fade slightly over a decade. We recommend the suede finish for ADUs with heavy natural light because it hides wear better than polished. Call (936) 259-2607 and we'll help you pick a finish that holds up in your specific space.
Small chips can be filled with color-matched resin, but a through-crack in Silestone usually means slab replacement. Quartz doesn't have the natural grain that makes granite crack repairs hard to see. Once the structural integrity of the slab is compromised, the crack tends to travel. If the damage is from an installation error, our 365-Day Done Right Promise covers the replacement at no charge. Call (936) 259-2607 and we'll send someone out to assess it.
Once the cabinets are set and we've completed the template measurement, Silestone fabrication and installation typically takes 5 to 10 business days in Los Angeles. The template visit takes about an hour. Fabrication is 3 to 5 business days depending on the fabricator's queue. Installation is usually a single day with a two-person crew. The bigger time variable is slab availability from the regional distributor, which is why we confirm slab stock before we ever schedule your template. Call (936) 259-2607 for a timeline specific to your project.
We order Silestone slabs per project from regional distributors in Los Angeles, which means we can pull any current Silestone color and finish on demand rather than pushing you toward whatever is sitting in a local yard. We also work regularly with KraftMaid cabinetry, Cambria quartz, and Kohler fixtures on additions and ADUs, so the scheduling coordination is already built into our process. If you have a specific Silestone color in mind, call (936) 259-2607 and we'll check warehouse availability before you commit to anything.
What to Do Next
If you're planning a home addition or ADU in Los Angeles and Silestone is part of the plan, call us at (936) 259-2607 for a free estimate. We'll come out, look at the space, talk through your Silestone options, and hand you a written price before any work starts. That's how we do every project, from a small kitchen refresh to a full 1,200-square-foot ADU. As Trevor Nash puts it: "Give me the whole picture first, then we pick up the tools." We'll answer the phone, show up when we say we will, and stand behind the work for a full year after it's done.
Written by Trevor Nash, Owner, Penhallow Remodeling at Penhallow Remodeling, serving Los Angeles and nearby areas.