How much does an onyx bathtub cost?

What drives the price of an onyx bathtub?

Stone, block size, edition and freight drive the price. Onyx costs more than travertine in the same shape: Marblebee lists the same 70.87 × 31.5 × 23.6 in oval at $11,220 in beige travertine and $18,850 in green onyx, a 68% premium. Beyond that, one-off carving and limited editions move the price much further.

• Block size: Stone Forest's Bateau (78 in long, 2,000 lb) is carved from one block of honey onyx and lists at $30,000. Lotus's 81 × 51 in tub weighs 4,000 lb and lists at $16,999, so weight alone does not explain price.
• Edition: Cultheir describes its Sculptural Onyx tub as limited edition, with only a handful in existence, at $50,000. Its Opus tub is made to order at $35,000.
• Translucency: Cultheir and Marblebee both describe their onyx as translucent, and Cultheir says its veining glows when backlit.
• Lead time: Marblebee quotes 6 to 8 weeks of production plus 4 to 6 weeks of delivery for its green onyx tub. Lotus lists its tubs as in stock, with packing quoted at 1 to 4 business days.

What installation and extra costs come with an onyx bathtub?

Plan for freight, a drain, plumbing, delivery into the room and a floor check on top of the tub price. Lotus Sculpture says its onyx tub is too heavy for parcel carriers and adds freight after the order, based on weight and distance from Oceanside, California. Cultheir quotes white-glove delivery as a separate rate. Get a licensed plumber's quote and a structural engineer's floor check before you order.

• Floor: published empty weights run 1,600 to 4,000 lb, and a filled tub adds roughly 500 to 900 lb of water plus the bather. Our model of a 67 × 31 × 22 in marble tub reaches about 170 psf on its footprint against 40 psf typical residential live load. See the weight guide.
• Drain: Stone Forest asks buyers to supply drain specifications when ordering so the cutout fits, and suggests a toe-control tub drain with a 3 in thread. Marblebee sells a stone-covered tub drain at $145.
• Plumbing labor: not published by any seller above. Ask a licensed plumber and check local code.

How does onyx bathtub price change with size and type?

Size explains little. Lotus's 71 in and 81 in tubs share a price, and two Marblebee green onyx tubs differ by $6,930 ($18,850 for a 70.9 in oval, $25,780 for a 59.1 × 59.1 in soaking tub). Type and seller matter more.

• $16,999 to $18,850: Lotus Sculpture's three tubs and Marblebee's oval trough.
• $25,780 to $35,000: Marblebee's 59.1 in soaking tub, Stone Forest's Bateau and Cultheir's Opus.
• $50,000: Cultheir's limited-edition tub.

How do you compare quotes for a onyx bathtub?

Ask every seller for the same facts and compare delivered totals. Onyx is one-off stone, so confirm whether the tub in the photos is the tub you receive, the stone color range, wall thickness, weight, finish, drain cutout, packaging, freight terms and lead time. Lotus says the exact tub pictured is the one you get; a made-to-order tub may differ from its photos.

• Photos: the exact piece, or a representative example.
• Size: outer and inner dimensions, which many listings do not publish.
• Weight: the number your engineer needs.
• Delivery: freight to the curb, or white-glove into the room.

What does a Pietra Fonte quote include?

Every Pietra Fonte quote states the exact dimensions and weight of your tub, because each piece is made to order. Delivery is white-glove anywhere in the contiguous US. No prices are published on this page; request a quote through bespoke, browse onyx bathtubs, or read the onyx bathtub guide and the onyx stone page.