Cambria Home Additions & ADU Nationwide

Cambria Home Additions & ADU: The West Palm Beach Owner’s Guide

We stock and install Cambria-compatible surfaces for home additions and ADU projects in West Palm Beach, with typical installed pricing from $45,000 to $130,000 for full additions and $90,000 to $220,000 for detached ADUs. Most Cambria material orders arrive within 10-14 business days, and we coordinate installation so your project stays on schedule. Homeowners usually discover an issue when water stains appear on new drywall near a Cambria countertop seam, when cabinet gapping shows the substrate shifted after a Florida humidity cycle, or when a slab crack telegraphs through the quartz surface in an unconditioned ADU space.

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Which Cambria Models This Applies To

Cambria’s quartz surfaces for residential construction fall into several product lines, and matching the right specification to your addition or ADU matters for warranty coverage and performance. The Brittanicca, Torquay, and White Cliff lines are the most common selections we see in West Palm Beach additions along Flagler Drive and the El Cid historic district, where homeowners want the veining of marble without the porosity.

To identify your installed Cambria, check the underside edge of any removable piece, or the documentation from your original contractor. Cambria stamps a lot number and product name into the resin backing on full slabs; remnant pieces from a previous job may lack this. The critical spec is thickness: 2cm slabs require plywood substrate support and carry different span ratings than 3cm slabs, which can bridge cabinet runs without additional support. For ADU kitchenettes where space is tight, we’ve seen owners try to reuse 2cm remnants as waterfall edges without proper backing, and the flex shows inside six months.

We are an independent contractor, not affiliated with Cambria. We source through authorized distributors and can match OEM specifications, or recommend equivalent quartz products from Silestone when the lead time or price point works better for your project.

Signs Your Cambria Home Additions & ADU Is Failing

• Seam separation or lifting at the countertop edge. This usually traces to inadequate substrate prep or adhesive failure. In West Palm Beach, the combination of seasonal humidity swings and air conditioning that drops interior surfaces below the dew point stresses the bond line; we see this most in ADUs where the mini-split runs intermittently.
• Cracks radiating from sink or cooktop cutouts. These stress concentrations need proper support and relief cuts. Cambria’s installation guidelines specify a minimum 1/8-inch gap at cutouts; when a previous installer went tight to the fixture, thermal expansion does the rest.
• Surface etching or dull spots that don’t clean off. True Cambria quartz is non-porous, but harsh chemicals or abrasive pads can damage the resin binder. We’ve restored several surfaces in Northwood and Flamingo Park where owners used oven cleaner or bleach concentrates, stripping the finish.
• Water staining on drywall or cabinets below the countertop. This indicates a failed sink seal or backsplash joint, not the Cambria itself. The quartz doesn’t absorb, but the silicone seam behind it does degrade; Florida’s UV exposure through west-facing windows accelerates this.
• Visible substrate sag between cabinet spans. A 2cm slab over a 30-inch dishwasher gap without proper support will show a subtle dip before it cracks. We check this with a straightedge during every assessment; the fix is structural, not surface-level.

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Replacement Cost & What’s Included

For a full home addition in West Palm Beach, our installed price ranges from $45,000 to $130,000 depending on square footage, foundation type, and whether the space ties into existing HVAC. ADU construction runs $90,000 to $220,000, with the higher end covering detached units with full kitchens and independent utility service. Within those projects, Cambria surface work typically represents $2,000 to $6,500 for countertop installation in a kitchenette or bath.

What drives the range: slab size and edge detail (eased edge vs. ogee or waterfall), cutout complexity, and whether we’re matching existing Cambria in the main house. Demolition and disposal of old surfaces, plywood substrate replacement as needed, and proper sealing at all penetrations are included. Under Clause 1 of the Haven Standard, you receive a written price before any work starts; under Clause 3, no change proceeds without a signed change order. The 365-Day Done Right Promise covers installation workmanship, and Cambria’s own limited lifetime warranty covers material defects when installed to their specification.

DIY or Call Us?

There’s honest work an owner can do before calling. Check the cabinet support below with a flashlight, look for the Cambria lot number on any accessible edge, and photograph any cracks or lifting for reference. These steps save time when we arrive.

Where DIY goes wrong: quartz slabs weigh 20-25 pounds per square foot, and a standard kitchen run requires three or four people to maneuver safely. Improper lifting cracks the slab or damages cabinets. Cutting Cambria on-site requires diamond blades and water suppression; dry cutting silica-laden quartz is a genuine respiratory hazard and violates OSHA guidelines. We’ve been called to West Palm Beach jobs where a homeowner’s rented wet saw wandered off the cut line, ruining a $2,400 slab.

For assessment and a written quote, call us at (561) 475-3903. Estimates are free, and we bring material samples to match or complement your existing Cambria.

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