Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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Before
AfterAmeristar Bathroom Remodeling: The Los Angeles Owner’s Guide
Ameristar bathroom remodeling in Los Angeles typically runs $10,620-$33,040 for a full gut-and-rebuild, with walk-in shower conversions and tub-to-shower swaps landing between $4,130 and $14,160 depending on what’s behind the walls. We keep Ameristar-compatible tubs, shower pans, surrounds, and trim kits on our truck for common Series 4000 and Series 7000 configurations, and we can usually diagnose the failure and quote the fix in a single visit. Most Los Angeles homeowners discover the problem the hard way: a hairline crack in the acrylic that’s been weeping into the subfloor for months, a surround seam that’s pulled away from the wall, or a drain flange that never quite sealed right after the original install.
Which Ameristar Models This Applies To
Our crews work on the Ameristar tub and shower lines most often found in Los Angeles track housing and condo conversions from the mid-1990s through the early 2010s. The Series 4000 units use a three-piece surround with a tongue-and-groove seam system; the Series 7000 switched to a one-piece fiberglass shell that’s more durable but harder to move through a 30-inch doorway after framing is up. Trim kits are not cross-compatible between series, and the drain assembly on the 4000 uses a 1-1/2-inch ABS trap adapter while the 7000 steps up to 2-inch. If you can pull the escutcheon plate behind the handle, the model number is stamped on the valve body or printed on a sticker inside the access panel. For Ameristar specifically, we recommend OEM trim kits because the aftermarket handle sets often have a 1/8-inch variance in stem length that causes a slow drip no cartridge replacement ever fixes.
Signs Your Ameristar Bathroom Remodeling Is Failing
- Soft spots in the floor outside the tub or shower. Water is wicking under the vinyl or tile from a failed pan gasket or a surround seam that’s opened up. By the time the floor feels spongy, the subfloor has usually been wet for six months or more, and that’s a $1,500-$3,400 repair on top of the replacement.
- Mildew smell that returns within a day of cleaning. The caulk joint at the tub-to-flange line has failed, and water is sitting in the wall cavity. Caulk hides the problem; the real fix is pulling the surround, replacing the moisture barrier, and resetting the flange.
- Hairline cracks radiating from the drain opening. This is a stress fracture from an improperly supported pan. The Ameristar install spec calls for a mortar bed or rigid foam base; if the original contractor set the pan directly on subfloor, any flex creates exactly this crack pattern.
- Surround seams pulling apart at the corners. The tongue-and-groove joints on Series 4000 surrounds rely on a plastic locking strip that degrades in sustained heat. Los Angeles attics and west-facing upstairs bathrooms routinely hit 120°F, and the strips get brittle.
- Constant drip from the tub spout when the shower is running. The diverter gate inside the spout has worn out, or the original plumber installed a slip-fit spout meant for copper on a threaded steel nipple. The fix is a $12 part and ten minutes if you know which one you’re looking at.
BeforeAfterReplacement Cost & What’s Included
A full Ameristar bathroom remodel in Los Angeles runs $10,620-$33,040, and the spread comes down to four things: condition of the subfloor and wall framing once we open things up, whether you’re replacing just the tub/shower area or the entire bathroom, tile selection, and whether plumbing needs to move. A tub-to-shower conversion with a new Ameristar-compatible pan and surround lands between $4,130 and $11,800; a small bathroom remodel runs $5,900-$14,160. Every quote we write includes the demo, haul-off, rough plumbing, pan or tub reset with proper bedding, surround or tile install, trim kit, and a written warranty on the work. We also include a documented photo record of what we found behind the walls before we close them up. You get the price in writing before anyone picks up a tool, and no change proceeds without a signed change order.
DIY or Call Us?
Replacing a tub spout, a shower head, or a handle set on an Ameristar unit is something a careful homeowner can do with a wrench and some thread tape, and we’ll tell you exactly which part to buy if you call us. What a homeowner should not attempt is pulling a surround or pan. The moment you remove a surround, you’re exposing the waterproofing envelope, and if you get the flange lap wrong or skip the vapor barrier, you’ve just built a mold farm inside your wall. Los Angeles building code also requires a plumbing permit for any drain line work, and the inspector will want to see the trap adapter and waste line before it’s buried. If you’re not sure which side of the line your problem sits on, call (470) 298-9650 and describe what you’re seeing. We’ll help you sort it out over the phone, free.
FAQs
An Ameristar tub or surround installed to spec lasts 15 to 25 years in Los Angeles, but units installed without proper bedding or with exterior-wall sun exposure can start failing in as little as 7 to 10 years. The acrylic itself doesn’t rot; what fails is the install detail around it.
We can patch a crack if it’s smaller than two inches and not near the drain or overflow, but we’ll tell you honestly: a patch is a two-to-five-year fix, not a permanent one. Once the structural foam underneath has flexed and cracked, more fractures will follow, and the repair cost starts to outweigh a proper replacement. Call (470) 298-9650 and we’ll tell you which side of that line you’re on.
A standard tub-to-shower conversion takes three to four working days in Los Angeles when the subfloor and framing are sound. If we find water damage or need to move a drain line, the job can stretch to five or six days, and that’s reflected in the written change order before we proceed.
We carry common Ameristar Series 4000 and 7000 trim kits, drain assemblies, and surround seam strips on the truck, and we can source OEM pans and tubs within two to three business days here in Los Angeles. We also quote equivalent Ameristar-compatible parts when they cost less and perform the same, and we’ll show you both numbers side by side before you choose.
Written by Grant Rowan, Owner, Rowan Construction Group at Rowan Construction Group, serving Los Angeles and nearby areas.