Converting a single vanity to a double vanity typically costs $1,500-$5,500, with many straightforward projects landing near $3,200. The final price depends on vanity width and quality, whether a second drain and water lines are easy to add, and whether the countertop, wall, or floor needs alteration.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Complete conversion | $1,500 | $3,200 | $5,500 | Vanity, countertop, two sinks, plumbing, and installation |
| Vanity cabinet and top | $600 | $1,600 | $3,500 | About 60-72 inches wide; stock to semi-custom |
| Plumbing changes | $400 | $1,000 | $2,000 | Second faucet, drain, and supply connections |
| Installation labor | $400 | $900 | $1,600 | Removal, fitting, and finish work |
| Per added sink | $300 | $700 | $1,400 | Can include sink, faucet, and plumbing work |
What a 60-inch vanity conversion usually costs
A basic conversion costs about $1,500-$2,500 when a 60-inch stock vanity fits the existing space, the new top includes two sink openings, and plumbing lines are nearby. This range generally assumes standard sinks and faucets, modest wall or floor repairs, and no major electrical or code work.
A typical midrange project runs $2,500-$4,000. It may include a 60-72-inch cabinet, a solid-surface or engineered-stone top, two faucets, new traps and supply connections, and professional removal and installation. Premium cabinetry, natural stone, custom sizing, or relocated plumbing can push the bill to $4,000-$5,500 or more.
For a normal-access bathroom with limited plumbing changes, budgeting about $2,500-$4,000 is a practical starting point. Local labor, material selection, and the condition of the existing wall and floor can move a quote outside that range.
Assumptions: U.S. midmarket pricing, standard 60-72-inch vanity, two sinks, ordinary access, and no extensive water damage.
How cabinet, plumbing, and labor charges divide
Quotes vary in what they include. A low cabinet price may exclude the countertop, faucets, disposal, or plumbing reconnection, so comparing the full written scope matters. The ranges below describe common installed project components; overlapping items are not meant to be added mechanically when a contractor bundles work.
| Quote component | Typical range | What the charge may include | Common price driver |
|---|---|---|---|
| Cabinet and countertop | $600-$3,500 | 60-72-inch cabinet, top, sink cutouts | Stock versus custom; laminate versus stone |
| Sinks and faucets | $250-$1,200 | Two basins and two standard faucets | Material, brand, and faucet features |
| Plumbing materials and work | $400-$2,000 | Drain, trap, supply lines, connections | Distance to existing lines and wall access |
| Removal and disposal | $150-$500 | Old vanity, top, and debris haul-away | Weight, stairs, and disposal rules |
| Installation and finish labor | $400-$1,600 | Set cabinet, fit top, seal, and touch up | Fit problems and finish repairs |
| Permits or inspection | $0-$400 | Local plumbing permit if required | Jurisdiction and extent of pipe changes |
A countertop sold separately can add $300-$1,500 or more, depending on material, edge profile, and fabrication. A plumber may charge $75-$150 per hour, while a carpenter or installer may charge $50-$100 per hour. Some contractors use a fixed project price instead of itemized hourly billing.
Confirm whether the quote includes both sinks, faucets, countertop fabrication, haul-away, and final plumbing testing. Those exclusions can make a seemingly cheaper bid more expensive once the full scope is included.
Which drain spacing and counter size raise the quote
The biggest technical variable is whether two sinks can connect to the existing drain and supply system without opening a large area of wall or floor. If the second sink is close to the existing plumbing, a plumber may be able to extend lines within the vanity. If pipes must move through finished walls, costs can rise by several hundred dollars; extensive rerouting can add $1,000-$2,500 or more, including patching.
Width affects both fit and materials. A 48-inch cabinet may technically hold two compact basins, but it can leave limited counter space and tight faucet spacing. A 60-inch vanity is a common practical minimum for two everyday sinks; 72 inches offers more room but may require a wider top, extra demolition, or changes to trim and adjacent fixtures. Measure the usable wall, not just the old cabinet.
Countertop material also changes fabrication costs. Laminate and some prefabricated tops can keep the cabinet-and-top package near $600-$1,500. Quartz or granite tops with two cutouts often cost $900-$2,500 before installation, with custom edges or unusual dimensions adding more. Stone slabs may require a template visit and can have minimum fabrication charges.
Existing damage matters. Soft subfloor, a leaking shutoff valve, mold, or a wall that is not level may need repair before the new cabinet can be secured and sealed. A small valve replacement may cost $100-$300; concealed water damage can be substantially more once opened. Quotes should distinguish known work from allowances for concealed damage rather than treating uncertain repairs as guaranteed.
How long plumbers and installers need for the swap
A simple replacement using nearby supply and drain lines may take one working day, often about 6-10 combined labor hours across trades. A more involved conversion with pipe relocation, countertop templating, patching, or custom cabinetry can take 2-5 working days spread across multiple visits. The calendar span may be longer because stone tops are fabricated after measurements are confirmed.
Plumbers commonly bill $75-$150 per hour, with minimum service charges of roughly $100-$250 in many markets. Cabinet installers and finish carpenters often charge $50-$100 per hour or quote the full installation. A two-person crew may finish the physical cabinet removal and setting faster, but crew size does not necessarily reduce total labor cost.
Scheduling depends on whether the top is ready, the old vanity can be removed without damage, and shutoff valves work. If plumbing is disconnected before the replacement is on site, the bathroom may be unusable for longer. Ask the contractor to identify the work sequence, expected water-off period, and whether a return visit is included in the bid.
Labor pricing is easiest to compare when the quote states crew size, estimated hours, and which trade handles each task. A fixed-price quote can be clearer for a defined scope, while hourly work may be appropriate when hidden conditions are uncertain.
Three bathroom layouts and their likely totals
These examples show how scope changes the total. They assume ordinary U.S. access and standard-quality fixtures; regional rates and product choices can shift each estimate.
| Example | Scope | Estimated total | Why it costs that amount |
|---|---|---|---|
| Compact 60-inch swap | Stock cabinet, prefabricated top, nearby plumbing, 8-10 labor hours | $1,700-$2,700 | Little wall repair and standard fixtures |
| Midrange 60-72-inch upgrade | Engineered-stone top, two faucets, drain extension, 12-18 labor hours | $2,800-$4,500 | Better materials and moderate plumbing work |
| Custom 72-inch conversion | Custom cabinet, stone top, lines relocated, wall patching, 20-30 labor hours | $4,800-$7,500 | Fabrication, rerouting, and finish repairs |
In the compact example, the second sink can often be served by extending accessible lines inside the cabinet. The midrange example allows for a more substantial top and additional plumbing labor, but not major demolition. The custom example includes enough allowance for more complex fitting and coordination; unusually high-end materials or concealed damage can exceed its range.
For a separate per-unit comparison, adding a second sink and faucet to a suitable existing double-ready top may cost about $300-$900, including basic installation. Replacing the entire cabinet and top generally costs more because removal, fabrication, and cabinet setting are part of the job.
Use these examples as scope comparisons, not fixed national rates. A quote should state vanity width, top material, fixture allowance, plumbing changes, and finish repairs so the total can be matched to the relevant scenario.
Why urban and rural labor rates change the quote
Labor and delivery often make an otherwise similar vanity conversion cost more in high-cost metro areas. A project in a major coastal city may run about 15%-35% above a national midmarket estimate, particularly when licensed trades have high minimum charges or parking and access are difficult. Smaller cities and suburbs often track near the middle of the range.
Rural projects may be about 5%-20% below metro labor rates, but travel fees, limited contractor availability, or delivery surcharges can offset the savings. In remote areas, the cabinet or countertop may also cost more to transport. These differences are local rather than universal; a rural plumber with a long drive may charge a higher total than a nearby urban contractor.
Ask whether the estimate includes delivery, debris removal, permit fees, and any trip or minimum charges. If a countertop fabricator or plumber must make separate visits, travel and scheduling can affect the total even when hourly rates appear low. Compare local written quotes for the same scope rather than adjusting a national average by location alone.
Where homeowners can trim the double-sink bill
Keeping the new vanity near the existing plumbing wall is often the most effective way to control cost. Choose a standard 60- or 72-inch cabinet that fits the room, and avoid moving drains unless the current layout prevents proper sink spacing. A prefabricated top can also cost less than a custom slab, especially when its dimensions match a common cabinet size.
Keep the existing mirror, lighting, flooring, and wall finish if they remain in good condition. Replacing these during the project can add separate electrical, carpentry, and finish charges. Homeowners can clear the room and remove personal items before the crew arrives, but plumbing disconnection and heavy cabinet removal should be left to qualified workers when there is a risk of leaks, injury, or wall damage.
Request at least three itemized bids using the same measurements and fixture allowance. Compare the cabinet, top, sinks, faucets, plumbing scope, disposal, permit responsibility, and warranty—not just the bottom line. Check whether the contractor has included patching and reconnection, and ask how any unforeseen damage will be priced before approving additional work.
Preserving the existing layout and limiting finish upgrades usually saves more than choosing the cheapest faucet. Select fixtures within a clear allowance and verify compatibility with the sink holes and countertop before ordering to avoid restocking fees or installation delays.
When repair or a wider vanity beats conversion
A second basin is not automatically the least expensive solution to shared-bathroom congestion. If the current cabinet is sound and the room is too narrow for a 60-inch double vanity, replacing the faucet, adding storage, or repairing a leak may cost $150-$700, depending on the work. That approach avoids a full cabinet-and-top replacement but does not provide a second washing station.
If a vanity is already due for replacement, compare the cost of a single-sink upgrade with a double-sink model. A 48-inch single vanity may fit a compact room better and preserve counter space, while a 60-72-inch double setup typically needs adequate clearance for doors, drawers, and users. A double basin squeezed into a small top may create cramped faucet spacing and limited usable surface.
For homes with a single existing sink and sound finishes, a full conversion often costs $1,500-$5,500. For a deteriorated cabinet, water-damaged top, or plumbing that needs major relocation, replacing the entire vanity assembly may be more practical than paying to adapt worn components. Base the choice on the room dimensions and the condition of the existing cabinet, not the sink count alone.
Before signing, verify the cabinet width, drawer and door clearances, sink placement, faucet-hole pattern, and shutoff access. Ask whether the installed price includes sealing the top, testing both drains for leaks, and removing the old vanity. These details help distinguish a complete conversion from a partial installation quote.