Manhattan Beach Bath Remodel — Salt-Air-Proofed, Permitted Right, Done in 5 to 9 Weeks
The two failure modes we see most often in Manhattan Beach baths
First: black mold behind the shower wall at year three because the original installer used standard greenboard instead of a cement board or a foam-board system, and the bath fan was a 50-CFM contractor-grade unit that could not move air against the marine humidity. Second: corroded fixture stems. Chrome looks fine for 18 months, then the salt finds the brass underneath and the handles seize. A Manhattan Beach bath has to be built differently from a Sherman Oaks bath — same square footage, double the moisture load, triple the corrosion risk. Our 2026 cost band: $45K to $140K depending on whether you are touching the shower pan, the window, or the structural framing under the tub.
Where the cost lands in the band
$45K to $65K covers a standard hall-bath refresh: tile, vanity, mid-tier fixtures in marine-grade finish, IP65-rated fan, fiberglass-clad window replacement. $75K to $105K is a primary bath with a curbless shower, custom vanity, separate tub, and view-axis window. $120K to $140K is full gut down to studs, structural reframe, custom shower with linear drain, and a wet-room layout. Most Hill Section and Sand Section primary baths we deliver land at $85K to $105K. Three line items on every quote: demo-and-structural, tile-and-stone, fixtures-and-MEP. No lump sums.
Permits and the MB Building & Safety queue
Bath remodels that stay inside the existing footprint and do not relocate plumbing fixtures more than two feet typically clear plan check in four to six weeks. Move a toilet or shower drain and you trigger plumbing plan check plus an additional rough inspection — add two to four weeks. Window replacement on a Coastal Zone elevation may trigger CDP review. We file everything; you do not call the city. Title 24 mandates IP65 fans with motion-sensor or humidistat control on every bath — we spec Panasonic WhisperGreen or equivalent on every job.
The 5 to 9 week schedule explained
Week 1: demo, framing repair, structural inspection if reframing. Week 2: rough plumbing and electrical, fan rough-in. Week 3: city rough inspection, cement board, waterproofing membrane (we use Schluter Kerdi on every shower). Week 4-5: tile, stone, paint. Week 6-7: fixtures, vanity, glass shower enclosure measure-and-install. Week 8-9: punch, final inspection, hand-off. Most standard primary baths finish week 7. A reframe or window swap pushes to week 9. We hold the schedule we quote.
What our walk-through looks like
One visit, 30 to 40 minutes. You get (1) a tight 2026 cost band off real Manhattan Beach bath invoices, (2) two comparables at similar scope, (3) a scope-risk read on what we expect to find behind the wall — pre-1980 baths in MB often have galvanized supply lines and cast-iron drains that need to come out, and we flag that on the walk so it is not a Week 2 surprise. No commit. If you are already locked in with another GC, reply all set and we are out of your way. If our number is off another bid, we will tell you exactly where — almost always it is contingency, waterproofing spec, or fan rating.
FAQ
What makes a fixture "marine-grade" for Manhattan Beach?
PVD finishes (physical vapor deposition) on brass, not electroplated chrome. Brizo Litze, Kohler Components Stonewashed, and Newport Brass Stella all have PVD options that hold up against salt air for 10+ years. We spec these by default within four blocks of the sand.
Do I need a permit for a like-for-like bath remodel?
Yes. Any plumbing, electrical, or structural work in Manhattan Beach requires a permit regardless of whether you are moving fixtures. Pure cosmetic (paint, vanity swap, no plumbing touch) does not — but those projects are rare.
Can you reuse my existing tile?
Sometimes. If grout is intact and there is no mold behind, we can refresh with epoxy regrout and a deep clean. If the substrate is greenboard or there is any water staining, we recommend full tear-out — the second-time fix is always more expensive than doing it right once.
What ventilation do you install?
Panasonic WhisperGreen 110-CFM with humidity sensor, ducted directly outside with insulated marine-grade duct. Title 24 requires it; we go above code on duct insulation because of the marine layer.
How do you handle waterproofing?
Schluter Kerdi membrane on every wet wall and shower floor. Kerdi-Drain on every linear drain. Pre-slope mortar bed, full waterproof envelope tested before tile. Five-year zero-leak record on the Schluter system in our LA portfolio.
Do you carry liability insurance for the work?
Yes. $2M general liability, $1M auto, workers comp. Certificate of insurance provided before contract signing. CSLB-licensed GC since 2023, architectural design firm since 2016.
What if my window faces the ocean?
Fiberglass-clad, not aluminum or vinyl. Marvin Ultimate or Andersen E-Series. Aluminum corrodes; vinyl warps in direct sun on the ocean side. We do not install either within six blocks of the sand.