Tub-to-Shower Conversion Cost Oahu | 2026

Tub-to-shower conversions are the single most requested bathroom project we get from Oahu homeowners in 2026. Kids have moved out, the guest tub never gets used, and a big walk-in shower is safer, easier to clean, and adds resale value in Honolulu's condo-heavy market.

What a Tub-to-Shower Conversion Actually Costs on Oahu

Basic swap (fiberglass/acrylic surround, standard glass door): $6,500 – $11,000. Same footprint as the old tub, minimal tile work.

Mid-range tile walk-in (porcelain tile, semi-frameless glass, niche, new valve): $12,000 – $19,000. This is the sweet spot for most Oahu bathrooms.

Curbless / zero-threshold spa shower (linear drain, full tile, frameless glass, bench): $18,000 – $30,000+. Requires floor framing changes and waterproofing to Hawaii code.

Prices assume a licensed Oahu contractor pulling a City & County of Honolulu plumbing permit. Handyman jobs skip the permit — and skip the resale-day paperwork.

Timeline

Most Oahu tub-to-shower conversions run 7 – 14 working days on site once materials arrive. Custom glass adds 2 – 3 weeks of lead time in Hawaii because most panels are fabricated on-island after templating.

Do You Need a Permit in Honolulu?

Yes — any time plumbing is moved (relocating the drain, adding a linear drain, adding a rain head on a new supply line), the City & County of Honolulu requires a plumbing permit. A like-for-like fixture swap with no drain relocation is the only common exception.

Curbless Showers: Great for Aging in Place

A zero-threshold shower is one of the highest-ROI accessibility upgrades in a Hawaii home. It future-proofs the bath and looks luxe — but the subfloor has to be recessed or the finished floor raised, so it's easier to spec during a full bathroom remodel than as a standalone conversion.

How to Pick a Shower Remodel Contractor on Oahu

Ask for the C-22 (plumbing) or C-31/C-32 (general/tile) license number and verify it on the Hawaii DCCA site. Ask to see three completed tub-to-shower jobs in the last 12 months. Ask specifically about waterproofing membrane (Schluter Kerdi or RedGard) — cheap builds skip this and you'll pay for it in 5 years.

Talk to Ward Design Center

We convert tubs to showers across Oahu — from Kapolei to Kailua. Free in-home estimate, permit pulled by us, glass templated after tile. Call (808) 600-5065 or visit our Kapolei showroom to see finishes in person.