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Blanco Home Additions & ADU: The Los Angeles Owner’s Guide
A Blanco home addition or ADU project in Los Angeles typically runs $53,100 to $153,400, and that range assumes you’re working with a general contractor who handles the permits, the foundation, the framing, the tie-in to your existing structure, and the finish work. The Blanco part of this equation matters less than you’d think for cost, but more than you’d think for how the project gets planned and executed. Most homeowners land on this page because they already own a Blanco kitchen or bath fixture and are now asking whether the same design language and hardware can extend into a new addition, a garage conversion, or a detached ADU in the backyard. The short answer is yes, with some planning around lead times, rough-in specs, and which Blanco series you’re matching.
Here’s the reality we see across Los Angeles: an ADU or addition is a structural project first and a fixture project second. Blanco makes excellent sinks, faucets, and accessories, but they don’t make framing lumber, shear walls, or foundation rebar. What we do at Sawyer Remodeling is handle the entire build while making sure your Blanco products land in the right place at the right time, spec’d correctly before the drywall goes up. That sequencing is where projects like this go sideways for owners who try to manage it piecemeal.
Key Takeaways
- Blanco-specific planning: We coordinate Blanco fixture specs (sink dimensions, faucet hole spacing, drain locations) before rough-in so your new addition or ADU doesn’t need retrofit work later.
- Los Angeles pricing: Home additions run $53,100 – $153,400. ADUs run higher ($106,200 – $259,600) because of utility trenching and separate meter requirements in many LA neighborhoods.
- One contractor, one schedule: We handle permits, framing, plumbing rough-in, electrical, drywall, and finish out, plus we’re on site when your Blanco fixtures arrive, not the other way around.
- Written price before work starts: That’s The Relay Standard. The number on your proposal is the number on your invoice.
Which Blanco Models This Applies To
Blanco splits its kitchen sink lines into a few families, and the planning implications are different for each. The Silgranit line (composite granite sinks) has a specific rough-in footprint that varies by model; a Blanco Diamond Silgranit 33-inch single-bowl, for example, needs a 36-inch sink base cabinet with a particular cutout template, while the smaller Precis models can work in a 30-inch base. The Blanco Ikon and BlancoPerform series are stainless steel, and their sizes range from 25 to 45 inches, which changes where your drain line sits under the floor and where the faucet hole lands relative to the backsplash. If your existing kitchen has a 33-inch Silgranit and you’re adding a second kitchen in an ADU, matching the same model keeps things consistent, but the rough-in measurements have to be pulled from the actual cutout template, not from memory.
The faucet side matters just as much. Blanco faucets are single-hole by default on most newer models, but some come with optional deck plates to cover three-hole configurations. If your addition plans call for a wall-mount faucet (common in modern ADU kitchens we build in Echo Park and Highland Park), that decision has to happen before the rough plumbing inspection, because once the tile and drywall are up, switching from a deck-mount to a wall-mount means opening the wall. That’s the kind of compatibility gotcha that costs owners an extra few thousand when it’s discovered late.
On the OEM-versus-aftermarket question for Blanco parts specifically: Blanco’s warranty covers the sink and faucet themselves, but it doesn’t cover installation errors. We’ve seen owners buy a discounted Silgranit sink from an online reseller, only to find the packaging was opened, the cutout template was missing, and the “factory second” had a hairline crack near the drain flange. Buy from an authorized Blanco dealer or a supply house we work with, and test-fit every Blanco piece before the countertop fabricator cuts stone.
Styles & brands we work with
Signs Your Blanco Home Additions & ADU Is Failing
- You’re planning a second Blanco kitchen, but the rough-in wasn’t spec’d for it. This is the most common “failure” we see on Blanco-related additions in Los Angeles. The owner bought the sink and faucet months ago, the plumber roughed in standard locations, and now the Blanco drain doesn’t line up. We fix it by re-chipping concrete or re-framing the cabinet run, but it’s cheaper to catch it at plan stage.
- The Blanco sink in your existing kitchen is leaking at the drain flange, and you’re planning the addition around it. Silgranit sinks rarely crack, but the drain assembly can loosen over time, especially in LA’s hard-water conditions where mineral buildup causes gaskets to stiffen and shrink. If you’re expanding the kitchen, we replace the Blanco drain kit and re-seat the flange as part of the tie-in work.
- Your ADU’s Blanco faucet has low flow or sputtering. That often traces back to debris in the aerator or a kinked supply line, but it can also point to undersized supply lines that were never upgraded from the main house. In older Silver Lake and Echo Park homes with galvanized supply, we run new PEX to the ADU and spec the Blanco faucet’s flow rate accordingly.
- The Blanco sink in your addition shifts or drops after install. Undermount Blanco sinks need a mechanical support system (silicone alone isn’t enough). If a previous contractor glued it and walked away, you’ll feel movement within a year, and eventually the seal fails. We re-support everything we install, including Blanco sinks, with steel brackets and a fresh silicone bed.
- Your gate or fence adjacent to the ADU is pulling away from the post. This isn’t a Blanco part, but it’s a common Los Angeles ADU failure we fix alongside Blanco kitchen installs. Gate hinges loosen in the dry heat, and the fix is structural: deeper post footings, not a longer screw.
See the difference
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AfterReplacement Cost & What’s Included
For a Blanco home addition or ADU in Los Angeles, plan on $53,100 to $153,400 for a full addition, and $106,200 to $259,600 for a detached ADU. The Blanco-specific components (sink, faucet, potentially a second sink in a laundry or prep area) are a small slice of that, typically $500 to $2,500 depending on the model you’re matching. What drives the larger number is the structural work: foundation type (post-tension slab versus raised floor), square footage, whether the existing roof has to be re-framed for a tie-in, and what the LA Department of Building and Safety requires for your specific lot. In hillside neighborhoods like Mount Washington, grading and retaining wall costs add up fast. In flat areas like Mar Vista or Westchester, the numbers stay closer to the low end.
Every Sawyer Remodeling quote on a Blanco addition or ADU includes a written, line-item price before any work starts. That covers permits, site prep, foundation, framing, rough plumbing and electrical, drywall, paint, flooring, and fixture installation. If the Blanco sink or faucet you selected isn’t in stock locally, we flag it during the quote so you’re not waiting three weeks on a backordered model. The 365-Day Done Right Promise applies to the entire project: if something isn’t done right in the first year, we make it right, in writing, no argument.
DIY or Call Us?
For the Blanco plumbing fixture itself, there’s some room to DIY if you’re comfortable with a basin wrench and you’re replacing an existing faucet on an existing sink. But on a home addition or ADU, the Blanco work is tied into the rough-in, the countertop cutout, and the inspection sequence. A wrong-sized hole in a stone countertop is a $2,000 mistake. A drain line placed two inches off costs you a jackhammer and a plumber. If you’re mid-project and the Blanco piece doesn’t fit, stop and call us at (254) 272-5876 before cutting anything. We’ll assess what’s there, what the spec actually requires, and what the fix costs in writing.
And on the structural side, don’t DIY any of it. Foundation work, shear walls, roof tie-ins, and gas/electrical rough-in require permits and licensed trades. Luca Romano has been swinging tools in Los Angeles for over two decades, and the jobs he gets called in to fix are almost always the ones where someone saved money by skipping the plan stage.
FAQs
A Blanco Silgranit sink should last 20 to 30 years in normal Los Angeles use, and a Blanco stainless faucet typically holds up for 10 to 15 years before the cartridge or finish starts to show wear. Hard water from LADWP’s supply shortens faucet cartridge life, so regular descaling helps.
Yes, if the issue is a leaking drain flange, a loose mounting clip, or a worn faucet cartridge, those are repairs we do regularly without pulling the sink. If the Silgranit material itself is cracked or the faucet body has corrosion at the base, replacement is the honest call.
A straightforward faucet swap takes 1 to 2 hours. An undermount Blanco sink in a new countertop gets installed during countertop fabrication day and takes 2 to 3 hours once the slab is on site. We schedule both around your project timeline, not the other way around.
We stock common Blanco drain assemblies, mounting clips, cartridge kits, and aerators on our service trucks for Los Angeles calls. For full sinks or specific faucet models, we order from our local supply partners, and most Blanco items arrive within 3 to 7 business days. We also work with KraftMaid, Cambria, and Silestone for the surrounding kitchen materials, so the whole project comes from known brands.
No. The written price we give you before work starts is the price you pay, unless you change the scope. That’s the Relay Visibility Guarantee: a live arrival time, photo updates before and after, and a written price before a single tool is picked up. Luca Romano puts good work down the same way every time, because good work doesn’t need a sales pitch, it just needs to be done right.
Call (254) 272-5876 to schedule your free estimate on a Blanco home addition or ADU in Los Angeles. We’ll walk the site, confirm what’s compatible with your existing Blanco fixtures, and hand you a written price before you commit to anything.
Written by Luca Romano, Owner, Sawyer Remodeling at Sawyer Remodeling, serving Los Angeles and nearby areas.
