Blanco Home Additions & ADU Nationwide

Blanco Home Additions & ADU: The Boca Raton Owner’s Guide

Blanco-compatible fixtures and fittings for home additions and ADUs in Boca Raton typically run $45,000-$130,000 installed, depending on whether you’re extending the main structure or building a detached unit. We stock Blanco sink basins, faucets, and drainage assemblies for these projects, and we can source same-day from our KraftMaid, Cambria, and Silestone partners when a specific finish or dimension is needed. Most Boca Raton owners discover their Blanco component is failing when water pressure drops in the new wing, drainage slows in the ADU kitchenette, or the faucet base loosens from thermal expansion cycling - common in Florida’s humidity and salt-air environment.

Call (754) 254-8065

Which Blanco Models This Applies To

Blanco’s residential lineup breaks into three series relevant to home additions and ADU work: the Precis undermount silgranit sinks (popular in compact ADU kitchens for their scratch resistance), the Quatrus R15 stainless line (specified in larger additions where apron-front or farmhouse styling is requested), and the Culina semi-professional faucet series (the pull-down model we see most often in Boca Raton’s rental ADUs). The label is etched on the sink basin underside or printed on the faucet escutcheon - you’ll need the five-digit model prefix, not just the series name, because Blanco revised drain outlet spacing in 2019 and again in 2022. A Precis 401923 from 2018 uses a different basket strainer depth than a 2023 unit with the same exterior dimensions.

We source OEM Blanco parts through our regular supplier, but we’ve also vetted two aftermarket equivalents for drain assemblies and aerator cartridges that meet the same 1.5-inch drain outlet spec and carry comparable warranty terms. The decision usually comes down to lead time: OEM runs 3-5 business days, aftermarket is next-day from our West Palm distributor. For silgranit color matching - the biscuit and truffle finishes Boca Raton designers request most - OEM is the only reliable path; aftermarket colorants shift under Florida’s UV exposure.

Signs Your Blanco Home Additions & ADU Is Failing

• Water pooling at the sink rim. The silicone seal between the Blanco undermount basin and the countertop substrate has degraded. In Boca Raton, we see this accelerate when additions lack proper soffit ventilation and attic heat radiates down through the cabinet box, cycling the adhesive.
• Faucet handle requires increasing force to swivel. The ceramic disc cartridge is accumulating mineral scale from Palm Beach County’s moderately hard water supply. Left unaddressed, the brass valve body threads gall and the entire faucet body needs replacement.
• Drainage gurgling or slow emptying. The Blanco basket strainer’s brass tailpiece is corroding at the slip-joint, or the P-trap weep hole is clogged with construction debris from the original addition build. ADU drains are especially prone because they’re often tied to longer horizontal runs.
• Finish discoloration or chalking. Silgranit surfaces develop a haze from salt-air oxidation if the addition faces east toward the ocean. This is cosmetic until the gel coat micro-cracks, which we check with a 10x loupe during service.
• Base movement or handle wobble. The mounting nut beneath the countertop has loosened from thermal expansion. In one Mizner Park area addition we serviced, the homeowner had tightened it three times before calling; the threads were stripped and required a full faucet replacement.

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After

Replacement Cost & What’s Included

The range depends on access - pedestal sinks in small ADU baths take longer than drop-ins with full cabinet bases - and whether we need to match existing silgranit color. Our price is flat and written before work starts, per Clause 1 of the Haven Standard. The 365-Day Done Right Promise covers all labor; OEM parts carry Blanco’s warranty, aftermarket carries ours. We pull no permits for fixture swaps, but we’ll flag if your addition’s plumbing rough-in was never properly inspected - something we’ve found twice in Boca Raton’s 1980s-era expansions.

DIY or Call Us?

There’s a safe middle ground. A homeowner can verify the model number, check the shutoff valves operate freely, and photograph the underside layout for our dispatcher - this saves us twenty minutes on arrival. What goes wrong: over-tightening the basin mounting clips on a silgranit sink (it cracks), forcing a corroded tailpiece (it snaps inside the wall stub), or mismatching the cartridge orientation in a Quatrus handle (hot and cold reverse, and the ceramic discs chip). We don’t recommend drain snake work past the P-trap in any addition tied to the main house stack; one punctured vent line in a Boca Raton job cost the owner $1,800 in drywall repair. Call (754) 254-8065 and we’ll walk through what you’re seeing before you decide.

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