Cost to Convert a Single Sink to Double 2026
The cost to convert a single sink to a double varies by cabinet size, plumbing work, and fixture quality. Main drivers include cabinet modifications, faucet and drain work, plumbing permits, and labor time. The following figures assume a standard 24-inch-wide vanity with basic fixtures inside a typical U.S. residential kitchen or bathroom.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Estimated total | $1,000 | $2,100 | $4,000 | Assumes standard vanity, basic plumbing, no major rerouting |
| Per-foot plumbing upgrade | $25 | $60 | $100 | Includes new trap, supply lines, shutoffs |
| Cabinet modification | $200 | $700 | $1,200 | Cutouts, reinforcement; may include new false fronts |
| Faucet & fixtures | $120 | $260 | $600 | Double-handle or single-handle, mid-range set |
| Labor (licensed plumber) | $300 | $900 | $2,000 | Typical 4–14 hours depending on configuration |
| Permits & inspections | $0 | $150 | $500 | Local rules vary by jurisdiction |
| Disposal & cleanup | $50 | $150 | $300 | Includes disposal of old parts |
Overview Of Costs
Cost to convert a single sink to a double typically ranges from about $1,000 on the low end to $4,000 or more on the high end, with most projects landing around $2,000-$3,000. The project breaks down into materials, labor, and permitting, with plumbing work often driving the total. Assumptions: region, specs, labor hours.
Cost Breakdown
Materials and fixtures usually account for 25–50% of the total, depending on faucet type, drain hardware, and whether new cabinetry is required. data-formula=”material_cost + fixture_cost”> Cabinet modifications may involve reinforcing the base, cutting a new sink opening, or adjusting storage. Assumptions: standard 24-inch vanity, one sink replaced by two basins.
| Category | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $120 | $350 | $900 | Faucet set, drains, mounting hardware |
| Labor | $300 | $900 | $2,000 | Licensed plumber; removal + install |
| Cabinets & trim | $200 | $650 | $1,200 | Modification or new paneling |
| Permits | $0 | $150 | $500 | Depends on local code |
| Delivery | $0 | $50 | $150 | Fixture transport |
| Disposal | $50 | $150 | $300 | Old sink, packaging |
What Drives Price
Labor hours and local wage rates are primary cost drivers, followed by the complexity of rerouting drains and supply lines. Assumptions: standard residential plumbing, no hard-to-access walls.
Two niche drivers to watch: 1) sink configuration—two basins with separate drains may require longer run lengths and more traps; 2) cabinet geometry—shallow or curved front cabinets can raise modification labor and material costs.
Regional Price Differences
Prices vary by region in the United States due to labor, material costs, and permit requirements. In the Southeast, expect roughly 5–12% higher than the national average for plumbing labor in some urban areas, while the Midwest may run near the national average. The West Coast often reports 8–15% higher due to permits and specialty fixture costs. Assumptions: urban vs rural adjustments.
Labor, Hours & Rates
Estimator view shows typical visits: a 4–6 hour job in a small bathroom vs. a 9–14 hour job in a kitchen with longer drain runs. Plumber rates commonly range from $85 to $150 per hour depending on region and license level. Assumptions: standard mid-range market rate.
Additional & Hidden Costs
Hidden costs may include a need for reinforced cabinets, extra shutoff valves, or patchwork in the wall or countertop. Unexpected issues such as hidden water damage or nonstandard pipe diameters can push total into the higher end. Assumptions: no major structural issues.
Real-World Pricing Examples
Scenario cards illustrate typical quotes for different project scales. Assumptions: mid-range fixtures, standard 24-inch vanity, no remodel of plumbing stacks.
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Basic: New double-basin conversion with standard faucet, minor cabinet cut, 4 hours of labor, no permits.
data-formula=”labor_hours × hourly_rate”> - Mid-Range: Double-basin upgrade with mid-range fixture, reinforced cabinet, 8–10 hours labor, permits optional.
- Premium: High-end faucet set, custom cabinet work, longer drain runs, and full permit process, 12–14 hours labor.
Budget tips include reusing existing fixtures when compatible, choosing standard drain configurations, and planning for off-peak scheduling to save on labor. Assumptions: region and fixture selection aligned with mid-range pricing.