A toilet sink combo typically costs $250-$1,500 for the fixture, with many standard installations totaling $450-$1,200. Price depends on whether the sink replaces the toilet tank lid or comes as a complete integrated unit, plus plumbing changes, labor rates, and bathroom access.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Tank-top sink fixture | $100 | $250 | $500 | Sink and faucet assembly for a compatible toilet |
| Integrated toilet-sink unit | $400 | $850 | $1,500 | Complete combined fixture, before installation |
| Standard installation | $200 | $400 | $800 | Labor and basic connections |
| Typical installed project | $450 | $800 | $1,800 | Fixture, labor, and common small parts |
What a toilet sink combo costs by unit type
A tank-top sink is usually the lower-cost option. It fits over a compatible toilet tank and uses water from the toilet’s fill line, so it generally avoids major plumbing work. The typical fixture price is $100-$500; a basic installed project often runs $300-$800.
A complete integrated toilet-and-sink fixture costs more, commonly $400-$1,500 before labor. With removal of the old toilet and installation, total quotes often land between $700 and $1,800. Designer finishes, compact models, and imported units can exceed that range.
Most standard projects budget about $450-$1,200 installed. Assumptions: standard residential bathroom, ordinary access, compatible connections, and no major drain relocation.
Where fixture, labor, and plumbing charges add up
Quotes vary in what they include. A low fixture price may not cover a new shutoff valve, supply line, haul-away, or the labor to adapt the existing setup. Ask whether the estimate includes tax, delivery, removal, and testing for leaks.
| Quote item | Low | Average | High | Typical basis |
|---|---|---|---|---|
| Tank-top sink or faucet assembly | $100 | $250 | $500 | Per fixture |
| Integrated combo fixture | $400 | $850 | $1,500 | Per unit |
| Plumber labor | $150 | $350 | $700 | About 2-5 hours |
| Supply line, valve, and fittings | $20 | $75 | $180 | Parts allowance |
| Removal and disposal | $40 | $100 | $250 | Existing toilet or fixture |
Labor and plumbing modifications are usually the biggest variables after the unit price.
How tank dimensions and plumbing access change the quote
Tank-top models must match the toilet’s tank shape and available lid dimensions. A nonstandard tank, narrow clearance, or unusual fill-valve location can limit choices or require an adapter. Confirm the manufacturer’s fit measurements before buying; an incompatible fixture can add return shipping or replacement costs.
Moving a water supply line or drain can add roughly $200-$700 for accessible, short adjustments. Work behind tile or inside a finished wall may cost $500-$1,500 or more, especially if patching is needed. A basic swap that reuses the existing toilet connection is usually much less involved.
Keeping the existing drain and supply locations is the strongest way to avoid plumbing surcharges. Assumptions: U.S. plumber rates of about $75-$150 per hour; difficult access may raise the hourly rate.
How long does toilet sink combo installation take?
A tank-top sink attachment may take 1-2 hours when the toilet is compatible and the shutoff valve works. Replacing a toilet with an integrated combo generally takes 2-5 labor hours, including removal, setting the new fixture, connecting supply lines, and leak testing.
A plumber may charge a service minimum of $100-$200 even for a short visit. Stuck bolts, corroded valves, uneven flooring, or a leaking flange can add 1-3 hours and $100-$450 in labor or parts. Request a quote that separates the base installation from repair contingencies.
Removal, valves, and finish work that can raise the total
Old-toilet disposal commonly adds $40-$150, though local hauling fees vary. Replacing a worn shutoff valve may add $75-$250 including labor, while a new braided supply line often costs $10-$35 for the part and more when installed as a separate service.
Some integrated units need a specific seat, faucet, or connector that is not included. These accessories can add $25-$150. If flooring or wall finishes must be repaired after removal or plumbing changes, budget another $100-$500 for minor patching; extensive tile repair can cost substantially more.
Check the included-parts list before comparing fixture prices. A lower sticker price may become less economical when required fittings and disposal are added.
How regional labor rates affect toilet combo pricing
Installation in high-cost metro areas, including parts of the Northeast and West Coast, may run 15%-35% above a national midrange estimate. Smaller cities and rural markets can be 10%-20% lower, although travel charges or limited contractor availability may offset the savings.
For a straightforward installation, labor may be around $200-$500 in a lower-cost market and $350-$800 in a high-cost metro. Fixture prices are less tied to location when ordered online, but freight, delivery, and return shipping can be significant for a heavy integrated unit.
Compare at least two local labor quotes using the same fixture and scope. This makes regional differences easier to identify than comparing one all-inclusive price with another.
Three toilet sink combo quotes with different scopes
A basic tank-top project might include a $180 sink attachment, a $25 supply line, and 1.5 hours of labor at $100 per hour. With a $50 service charge, the total is about $405 before tax, assuming the existing toilet and valve are compatible.
A midrange integrated replacement could include a $700 fixture, $350 labor for a three-hour installation, $75 in fittings, and $100 for removal. The estimated total is $1,225 before tax, with no drain relocation or floor repairs.
A difficult installation might use a $1,200 unit, $700 labor, $150 in plumbing parts, and $250 for disposal and minor finish repairs, totaling about $2,300. Each example assumes normal local pricing for its scope, not a fixed national rate.
How to lower the price without cutting necessary work
Measure the tank and check model compatibility before ordering. Reusing a suitable toilet, valve, and supply line can avoid replacement expenses, but only if the parts are sound and the fixture maker allows the connection. Avoid buying a unit based only on its advertised price if adapters or special fittings are required.
Ask contractors to price installation, removal, parts, and any optional plumbing work separately. Compare quotes with the same model and disposal scope, and schedule routine work rather than requesting urgent service. Choose a tank-top attachment when it meets the need and avoids replacing a functioning toilet.