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Cambria Home Additions & ADU: The San Diego Owner’s Guide
Cambria home additions and ADU construction in San Diego typically costs $53,100 to $153,400 for a full build, with most projects landing between $85,000 and $140,000 depending on square footage, site conditions, and finishes. We’re a San Diego general contractor that installs Cambria quartz countertops, backsplashes, and surfaces as part of larger addition and ADU work. When a homeowner calls us about a Cambria surface problem in their San Diego addition or ADU, the issue is almost always one of three things: a seam that’s opened up between slabs, edge chipping from impact, or a section that’s lost its polish from years of San Diego sun and hard water exposure.
If you’ve got a failed Cambria surface, a mismatched seam, or an addition that was framed around Cambria slab dimensions that didn’t line up, here’s what you need to know before you spend another dollar.
Which Cambria Models This Applies To
Cambria manufactures its quartz in jumbo slabs, typically 55 inches by 122 inches for the standard “Design” series, and 65 inches by 132 inches for “Jumbo” slab options offered on select designs. That slab size matters more than most homeowners realize. If your San Diego addition was designed around a standard Cambria slab and your fabricator quoted a seam placement that didn’t account for the actual slab dimensions, you end up with a visible seam running straight through your island or peninsula. We see it on ADU kitchen builds all the time in Clairemont and North Park.
Cambria doesn’t use the same model numbering system that appliance brands use. The design name is the model: Brittanicca, Torquay, Portrush, Summerhill, and so on. If you need a replacement section matched, you need the design name and the lot number, which is printed on the back of each slab and also appears on the original invoice from your fabricator. Cambria maintains a slab look-up system, but colors shift subtly between production lots. A Brittanicca slab poured in 2019 will not match a Brittanicca slab poured in 2025 exactly. When we handle a Cambria repair or addition in San Diego, we always account for this before promising a seamless match.
On the OEM-versus-aftermarket question: Cambria quartz is proprietary, and there is no genuine aftermarket equivalent for a matching slab. You can substitute a Silestone or Caesarstone in a similar color for a full replacement, and we stock all three brands, but for a patch or seam repair you need actual Cambria material. We order direct from Cambria’s distribution network with your design name and lot number.
Styles & brands we work with
Signs Your Cambria Home Addition or ADU Is Failing
- Seam separation between two slabs. This usually happens when the cabinet bases below settle or the substrate wasn’t fully level during installation. San Diego adobe soil shifts seasonally, and an addition built on a slab that wasn’t compacted properly will telegraph movement straight into your countertop seams.
- Edge chipping, especially near the sink or dishwasher. Cambria is hard quartz, but the edges are still vulnerable to impact from cast-iron pans and heavy pots. A chip along the front edge means the overhang or edge profile wasn’t finished with enough material left after cutting.
- Dulling or etching in high-use zones. Cambria is non-porous and doesn’t etch from acid like marble, but the factory polish will wear down over years of scrubbing with abrasive cleaners. It presents as a cloudy patch near the cooktop or prep sink.
- Countertop overhang cracking or vibrating. If your addition or ADU has an island with a 12-inch or 15-inch overhang and no corbels or steel brackets underneath, the slab can develop hairline cracks at the support points. We see this in San Diego ADU builds where homeowners wanted a breakfast bar but the plans never specified reinforcement.
- Cambria surface separating from the cabinet base. This is a sign the adhesive bead failed, usually from moisture intrusion at the joint or an undermount sink that’s been pulling away for years. If you can press down on the counter and feel movement, it’s time to address it before the slab cracks.
See the difference
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AfterReplacement Cost & What’s Included
For a Cambria surface repair as a standalone job in San Diego, you’re looking at $2,360 to $7,670 for countertop work depending on whether we’re replacing one section, re-seaming, or pulling and resetting an entire run. For a full addition or ADU build that includes Cambria countertops, the complete project range is $53,100 to $153,400. The countertop portion of that is usually $3,000 to $9,000 depending on how many slabs and which Cambria design you choose.
What drives the price in San Diego: how many seams are in the layout (fewer seams means a more expensive jumbo slab), whether your addition requires steel reinforcement for overhang spans, and the edge profile you want. A standard eased edge is the most affordable. A waterfall edge on an island is the most expensive because it doubles the material and fabrication.
Every Mason Remodeling Co San Diego job comes with a written price before any work starts. That price includes the Cambria material, fabrication, delivery, installation, and our labor. The written guarantee on your project runs 365 days from the completion date. If the seam opens or the slab doesn’t hold, we come back and fix it at no cost to you.
DIY or Call Us?
Cambria quartz repair is not a DIY job, and I’ll tell you straight: this isn’t a safety scare, it’s a materials reality. Cambria is 93% quartz by weight. You can’t sand it back to a polish with a palm sander from Home Depot. You can’t fill a seam with epoxy from a hardware store tube and expect it to hold. The repair resins we use are matched to the Cambria design and cured with UV light, and the polishing compounds are graded for quartz, not stone or granite. A homeowner who attempts this will make the problem visible in a different way, and then it costs more to fix the fix.
What you can safely do: clean the area with warm water and mild dish soap, take photos from multiple angles, and note the Cambria design name from your original paperwork. Then call us at (619) 673-9302. Tell me what’s broken. I’ll tell you what it takes.
FAQs
A properly installed Cambria surface in San Diego will last 25 to 40 years without structural failure, but the factory polish typically wears to a matte finish in high-traffic areas after 15 to 20 years of daily use, especially in ADU kitchens that get constant rental turn.
Most edge chips, seam separations, and surface scratches can be repaired without replacing the slab, as long as the structural substrate underneath is still sound and the crack doesn’t run through the full thickness of the quartz. Call (619) 673-9302 and we’ll tell you which category yours falls into after looking at photos or the actual countertop.
A seam repair or chip fill takes 2 to 3 hours on site. A full section replacement takes 5 to 10 business days because we have to order the specific Cambria design and lot match, fabricate the piece, and schedule the install. We’ll put that timeline in writing before any work begins.
We don’t stock full Cambria slabs in our San Diego yard because there are over 200 designs and storing them would be like keeping every paint color mixed at all times. What we stock on the truck are the repair resins, color-matched fillers, polishes, and edge profiles for the Cambria designs most common in San Diego, and we order full slabs through Cambria’s distribution network with your exact design and lot number.
Mason Remodeling Co San Diego is an independent contractor, not affiliated with Cambria. We install and repair Cambria quartz alongside other specification-grade brands including KraftMaid, Silestone, and Kohler.
Give Isaac Pruett and the crew a call at (619) 673-9302 for a free estimate on your Cambria repair or San Diego home addition. A live person answers every call, 24 hours a day, 7 days a week.
Written by Isaac Pruett, Owner, Mason Remodeling Co San Diego at Mason Remodeling Co San Diego, serving San Diego and nearby areas.
