Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Sterling Home Additions & ADU: The San Francisco Owner’s Guide
If you’re standing in a Sterling-built addition or ADU in San Francisco and something has failed, you’re not looking for a brochure. You’re looking for the part, the price, and the person who can make it right. We stock Sterling-compatible replacement parts for home additions and ADUs across San Francisco, and the typical installed repair range runs $531 to $15,340 depending on what failed. Most owners discover the problem the same way: a door stops latching after a rainy week, the shower pan flexes for the first time, or a cabinet hinge gives out and suddenly the whole door hangs crooked.
We’re an independent service provider, not affiliated with Sterling. What that means for you is simple: we tell you whether the OEM part is worth the wait or whether a quality aftermarket equivalent will outlast the original. And we show you the written price before any work starts, every time.
Which Sterling Models This Applies To
Sterling home additions and ADUs in San Francisco fall into two broad generations. The earlier builds, common in the Sunset District and Richmond District from the mid-1990s through the early 2000s, used Sterling’s Vikrell shower surrounds, fiberglass tubs, and entry doors with specific hinge spacing. The later generation, which you see more often in ADU projects near Glen Park and Noe Valley, moved to Sterling’s Ensemble series with a different drain assembly spec.
The compatibility gotcha most owners miss: the shower surround model number is stamped on the back side of the wall kit, not on the front face. If you can access the plumbing side, look for a label beginning with “60” on Vikrell units or “71” on Ensemble units. The drain opening is the other tell. Vikrell pans use a 2-inch compression-fit drain; Ensemble pans moved to a 2-inch threaded drain with a wider flange. If you order the wrong drain kit, it doesn’t just leak, it voids any remaining manufacturer warranty on the pan.
For cabinets and doors in Sterling ADUs, the hinge bore spacing on later models is 42mm on center, which is not the standard 35mm you’ll find at a San Francisco hardware store. That’s why generic replacement hinges never sit flush. We keep both spacing options on the truck.
Styles & brands we work with
Signs Your Sterling Home Additions & ADU Is Failing
- Soft spots in the shower pan or floor. This usually means the drain seal has degraded or the subfloor under a Vikrell pan has been wicking moisture for years. In San Francisco’s coastal humidity, a failing pan seal can go unnoticed for two winters before the flex becomes obvious.
- The ADU entry door won’t latch without lifting the handle. Most Sterling ADU doors in San Francisco settle because the original contractor anchored the jamb to a wall that shifts with the clay soil in neighborhoods like Bernal Heights. The hinge side needs re-shimming, not a new door.
- Cabinet doors that drift open or won’t stay closed. Sterling’s soft-close hinges on later Ensemble series ADU cabinetry lose spring tension after roughly eight to ten years of daily use. One hinge goes first, then the rest follow within a few months.
- Water staining at the tub lip or surround seam. This is almost always failed silicone caulk that Sterling originally applied over a gap wider than manufacturer spec. Re-caulking without addressing the gap just repeats the failure every couple of years.
- A gurgling bathroom sink in the ADU. In San Francisco, this often traces back to the shared vent stack. Many Sterling ADUs were tied into the main house’s vent with a horizontal run too long for code. The fix is usually a mechanical vent, not a replacement part, but it’s diagnosed the same visit.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
Replacement part and installation pricing for Sterling home additions and ADUs in San Francisco depends on what failed and how far the moisture traveled. Here’s the range we quote most often:
- Drain assembly replacement: $531 – $945
- Shower pan or surround repair: $3,540 – $10,030
- Cabinet hinge replacement (full ADU kitchen): $945 – $3,540
- Entry door re-shim and threshold replacement: $2,360 – $7,670
- Full shower replacement (Sterling Ensemble or equivalent): $5,310 – $14,160
Every quote includes the part, the labor, the shoe covers and drop cloths we put down before the work starts, and a photo of the clean-up before the crew leaves. You’ll get a written price before any tool touches the floor, and the work is covered by our 365-Day Done Right Promise. If it’s not done right, we make it right.
What drives cost in San Francisco is access. ADUs behind a main house in the Sunset District often mean carrying a new shower pan through a narrow side yard and around a stairwell. That labor shows up in the quote, and we’ll explain it line by line before you approve anything.
DIY or Call Us?
Some checks you can do safely: look at the hinge stamp on a failed cabinet door, photograph the shower drain from above, note whether the ADU entry door gap is wider at the top or bottom. That information helps us bring the right part on the first trip.
What you should not attempt is pulling a Sterling shower pan or surround in a San Francisco ADU without knowing what’s behind it. Many of these units were built tight to the property line, and the drain plumbing is often set in a slab or a shallow crawlspace. Cutting into the wrong spot turns a $600 drain replacement into a re-pipe. If the pan is flexing, don’t keep using the shower, water traveling under a Vikrell pan finds the framing fast. Call us at (831) 480-4497 and we’ll tell you over the phone whether it’s a same-day fix or a scheduled replacement.
Tell me what the room needs to do, and we’ll figure out the rest from there.
FAQs
A properly installed Sterling Vikrell surround lasts 20 to 25 years in San Francisco, while the Ensemble series pans typically hold up for 15 to 18 years before the drain seal or finish shows wear. Coastal fog and hard water from Hetch Hetchy accelerate mineral buildup that shortens the finish life. Call (831) 480-4497 and we’ll assess what you have.
Yes, if the failure is caught early. Hinges, drain gaskets, threshold seals, and caulk joints are all repairable parts. A cracked Vikrell pan is not; once the acrylic cracks, it can’t be patched reliably. Call (831) 480-4497 and we’ll tell you honestly which path makes sense.
Cabinet hinge swaps and drain seal replacements are done in under three hours. A full shower pan replacement in a San Francisco ADU typically takes two days, including dry time for the subfloor repair. We’ll set quiet hours around your family’s schedule and name the exact timeline in your written quote.
We stock the most common Sterling drain assemblies, hinge sets, and door thresholds on our trucks. Less common parts ship from Sterling’s western distribution center in two to four business days. Call (831) 480-4497 and we’ll check local availability while you’re on the phone.
If your Sterling addition or ADU in San Francisco is showing any of the signs above, call us at (831) 480-4497. We’ll talk through what you’re seeing, give you a written price before any work starts, and schedule a visit that works around your family’s hours. We also stock compatible parts for KraftMaid cabinetry, Cambria countertops, and Silestone surfaces in the units we service.
Written by Graham Stein, Owner, Elmstead Remodeling San Francisco at Elmstead Remodeling San Francisco, serving San Francisco and nearby areas.
