Bathroom Vanity Installation Guide: Types, Sizes & Plumbing

Types of Bathroom Vanities
Freestanding: The most common type. A cabinet that sits on the floor with a countertop and sink. Available in single and double sink configurations. Standard heights: 30-36 inches (comfort height: 34-36 inches, standard: 30-32 inches). Advantages: storage inside the cabinet, hides plumbing, and the widest selection of styles and sizes.
Wall-mounted (floating): Mounted to the wall with no legs touching the floor. Creates a modern, clean look. Makes the bathroom feel larger. Easier to clean the floor underneath. Requires wall blocking (2x6 or plywood backing inside the wall) for mounting support. More complex to install. $300-$2,000.
Pedestal sink: A standalone sink on a porcelain pedestal. No cabinet or countertop. Classic, elegant look. No storage (the pedestal only hides the plumbing). Best for: small powder rooms and traditional/classic bathrooms. $100-$500.
Vessel sink vanity: A bowl-shaped sink that sits on top of the countertop (not dropped in). Modern, decorative look. Requires a wall-mounted or tall vessel faucet. The countertop sits lower (because the sink sits on top). Taller overall profile. $200-$1,500.
Sizes
24 inches: Compact. For: small bathrooms, powder rooms, and half baths.
30 inches: The most common size for small to medium bathrooms. Single sink.
36 inches: Single sink with extra counter space and storage. A popular upgrade from 30-inch.
48 inches: Can accommodate a single sink (with lots of counter space) or a small double sink.
60 inches: The standard double-sink vanity. The most popular size for master bathrooms.
72 inches: Large double-sink vanity with generous counter space. For large master bathrooms.
Countertop Options
Cultured marble: The most affordable. $50-$200 for a single vanity top. Includes an integrated sink. Available in white, off-white, and solid colors. Easy to clean. The standard for builder-grade vanities.
Granite: Natural stone. $100-$500 per vanity top. Durable, heat-resistant, and beautiful. Requires sealing. Heavier.
Quartz: Engineered stone. $150-$600 per vanity top. Non-porous (no sealing needed), consistent appearance, and very durable. The premium choice for most bathrooms.
- Solid surface (Corian): $100-$
- 4
- 0
- Seamless (the sink can be integrated), repairable (scratches can be sanded out), and non-porous.
Installation
Remove the old vanity: Turn off the water supply valves. Disconnect the supply lines and drain (P-trap). Remove the mirror or medicine cabinet if it overhangs the vanity. Cut the caulk around the backsplash and wall. Unscrew the vanity from the wall. Remove.
Prep: Repair any wall damage. Mark the new vanity position. Check that the supply lines and drain align (the new vanity may require adjusting the plumbing if it is a different size).
Install: Position the new vanity against the wall. Level it (use shims under the base if the floor is uneven). Screw through the back rail into the wall studs (use #10 3-inch wood screws). Install the faucet on the vanity top before setting the top on the cabinet (much easier). Set the vanity top on the cabinet. Apply silicone adhesive between the cabinet and the top. Connect the supply lines (braided stainless steel supply lines, $5-$10 each). Connect the drain (P-trap). Caulk around the backsplash and where the vanity meets the wall and floor.
Costs
Vanity (24-36 inch, stock): $100-$600.
Vanity (48-60 inch, stock): $300-$1,500.
Vanity top (cultured marble): $50-$200.
Vanity top (quartz/granite): $150-$600.
Faucet: $50-$300.
Professional installation: $200-$500.
Frequently Asked Questions
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Bathroom Renovation & Plumbing Specialists
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