Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Blanco Home Additions & ADU: The Riverside Owner’s Guide
If you’re planning a home addition or ADU in Riverside and want Blanco fixtures and finishes built into it, we handle that from framing to final trim. A home addition in Riverside typically runs $45,000 – $130,000, and an ADU is a larger project at $90,000 – $220,000 depending on foundation, kitchen scope, and the Blanco products you choose. Most homeowners reach out to us after living with a floor plan that no longer works for them, or after realizing that a well-built ADU can cover a meaningful slice of the mortgage. Trevor Nash has seen firsthand how Riverside’s older neighborhoods, especially around Arlington, hide surprises behind the walls, and the right plan makes those surprises manageable instead of devastating.
What We Mean When We Say “Blanco Home Addition”
Blanco is a German manufacturer best known for kitchen sinks and faucets, including the Silgranit composite material that handles heat and daily abuse better than most stainless steel. When we build a home addition or ADU in Riverside, Blanco usually enters the conversation at the kitchen and bar sink stage. The brand has several series that create compatibility questions, which is worth understanding before you commit.
Blanco Sink Series You’ll Encounter
Blanco organizes sinks by mounting style and material. The main lines we install in Riverside additions are the Silgranit collection (composite granite, available in undermount and drop-in), the Precis line (narrower radius, modern edge), and the Diamond series (tighter corners, more usable bowl space in smaller cabinets). Each series has different cutout dimensions. A Precis sink will not drop into a cutout sized for a Diamond model. If you’re buying a Blanco sink yourself from a big-box supplier, check the cutout template against the cabinet width before ordering. We have corrected this exact mismatch more than once, and it’s cheaper to catch it before the countertop is cut.
OEM vs. Aftermarket: What Actually Matters
For Blanco sinks themselves, we install OEM only. The Silgranit material is proprietary, and a lower-cost aftermarket composite sink won’t match Blanco’s heat tolerance or scratch resistance. For related parts like drain assemblies, mounting clips, and basket strainers, reputable aftermarket components work fine and cost less. The mounting clips are the one item we insist on keeping genuine Blanco, because the tolerance difference means the sink either seats perfectly or it doesn’t.
For the wider project, we pair Blanco with other trade brands we trust: KraftMaid and Wellborn cabinetry, plus Cambria and Silestone countertops. Those carry their own manufacturer warranties alongside our 365-day workmanship guarantee, so you’re protected by two layers rather than one.
Styles & brands we work with
Signs Your Blanco Home Additions & ADU Plan Needs Attention
This is a planning stage page, so the “symptoms” are less about a failed part and more about warning signs that your addition or ADU is going to give you trouble later. Here’s what we see in Riverside homes:
- The kitchen space doesn’t fit a standard Blanco bowl. Older Riverside kitchens, especially in Arlington and Wood Streets, often have shallow cabinet boxes from the 1950s and 1960s. A modern Blanco undermount sink needs a deeper cabinet base. If yours is less than 24 inches deep, you’ll need a cabinet modification before the sink goes in.
- Your plumbing rough-in doesn’t match the sink location. Moving a Blanco sink to a kitchen island means extending drain and vent lines through the slab or crawlspace. Riverside’s combination of older slab foundations and newer raised foundations means every house is different. Getting the rough-in position right before drywall saves thousands.
- The countertop fabricator and the cabinet installer don’t coordinate. Blanco sinks work best when the countertop is templated with the actual sink on site. If the sink shows up after the countertop is cut, you risk a mismatch that no amount of caulk fixes cleanly. We bring the sink to the template day, every time.
- Your ADU’s kitchen is undersized for the rent you want. A Riverside ADU with a cramped kitchen rents for noticeably less than one with a real sink, a working stove, and counter space. We have seen small Blanco units make a compact kitchen feel larger just by maximizing the bowl depth and usable interior.
- Permit headaches are piling up. Riverside’s planning department has specific ADU height and setback rules depending on your zone. If you have already started and hit a permit wall, stop and call us. We work through the corrections with you, and we give you a written price for the fix before any work starts.
Replacement Cost & What’s Included
For a home addition in Riverside, plan on $45,000 – $130,000. The spread is not a guess; it is driven by square footage, foundation type, roof line connections, kitchen scope, and the finish level you select. A 400-square-foot bump-out with a modest bathroom lands on the lower end. A full primary suite addition with a new Blanco kitchen and Cambria countertops pushes toward the top.
An ADU in Riverside generally runs $90,000 – $220,000. Detached units cost more than garage conversions, mostly because of the foundation, utilities, and the separate roofline. The Blanco components are not the big line item; the structure is.
| Project Component | Typical Riverside Range |
|---|---|
| Home Addition (full project) | $45,000 – $130,000 |
| ADU Construction (detached) | $90,000 – $220,000 |
| Garage Conversion to ADU | $30,000 – $80,000 |
| Kitchen Remodel (inside addition/ADU) | $14,000 – $45,000 |
| Blanco Silgranit sink + faucet, installed | $700 – $2,200 |
| Countertop (Cambria or Silestone), installed | $2,000 – $6,500 |
Every project gets a written price before we pick up a tool. Not an estimate range. Not a verbal ballpark. A written number you can hold us to, and a written 365-day guarantee on our work. If something fails inside that year, we come back and fix it at no charge.
See the difference
Before
After
Before
After
Before
AfterDo You Pull the Permits?
Yes. We pull all required Riverside city permits for additions and ADUs, and we schedule the inspections. That is part of the written price, not an add-on. If a permit correction is needed, we handle it. Trevor Nash learned at Los Angeles Trade-Technical College that a clean inspection starts with knowing what’s in the walls before you cover them, and that habit has saved our Riverside clients real money on rework.
DIY or Call Us?
There is no safe DIY version of a home addition. Framing, foundation work, roofing connections, and the electrical and plumbing inside an addition or ADU are structural and life-safety work, which means Riverside code enforcement will require licensed work and passing inspections regardless. If you try to cut the permit corner, you risk the county flagging the unpermitted square footage when you sell. That is a five-figure mistake.
Where you can help: measure your existing kitchen cabinet depth and overall room dimensions before calling. Note the Blanco model you want, or take a photo of the label on a sink you already purchased. That lets us give you a tighter written number on the first visit. Call (341) 895-1170 and we’ll walk it through with you.
FAQs
A Blanco Silgranit sink should last 20+ years in normal Riverside use, because the material resists staining, chipping, and heat far better than enameled cast iron or thin stainless steel. The weak points over time are the drain assembly and the sealant around the rim, not the bowl itself, and those are straightforward to replace.
We can, as long as the sink’s cutout template fits the cabinet plan and the countertop material we’re installing. If the sink is the wrong size for the cabinet, we’ll tell you before any work starts and give you options, including swapping to a different Blanco model that fits without altering the layout. Call (341) 895-1170 and we’ll check the measurements with you.
Most Riverside additions take 4 – 7 months from permit approval to final inspection. ADUs run 5 – 9 months depending on foundation type and utility connections. We give you a written schedule along with the written price, and we show up in the arrival window we set.
We order Blanco products through our trade suppliers, which means we get exact models and finish matching without the big-box substitution problem. We also handle KraftMaid and Wellborn cabinets plus Cambria and Silestone counters, so the whole kitchen comes from one coordinated source. If a Blanco part fails after installation, we come back under the 365-day guarantee and make it right at no charge. Call (341) 895-1170 to get your free estimate started.
Get Your Riverside Addition or ADU Priced in Writing
We’re an independent Riverside contractor, not affiliated with Blanco, but we install their products because they hold up. Penhallow Remodeling Riverside is part of the Kingswell family of companies, operating to the Kingswell Way since 2004, and each location is independently owned and operated. You’ll get a real person on the phone 24/7, background-checked and uniformed technicians on site, and a written guarantee on every project.
Give you a number before we pick up a tool – that’s just how this works. Call (341) 895-1170 to schedule your free estimate.
Written by Trevor Nash, Owner, Penhallow Remodeling Riverside at Penhallow Remodeling Riverside, serving Riverside and nearby areas.
