Homeowners typically pay for a single-to-double sink conversion based on plumbing changes, cabinet adjustments, and fixture upgrades. The main cost drivers include faucet hardware, new drain configuration, PEX/PVC piping, labor time, and any required permits or inspections. This guide provides low, average, and high pricing in USD to help with budgeting and decision-making. Cost ranges reflect common residential projects and assume standard under-sink cabinet access.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Labor (plumber & carpenter) | $300 | $1,000 | $2,000 | Includes teardown, rough-in, and finish work. |
| Faucets & hardware | $150 | $350 | $900 | Two new faucets or a dual-handle faucet; added disposer if applicable. |
| Drain & Piping | $100 | $350 | $800 | New traps, tailpieces, and P-traps as needed. |
| Cabinetry & countertop work | $100 | $600 | $2,000 | Reconfiguring under-sink cabinet for two bowls. |
| Permits & inspections | $0 | $150 | $500 | Depends on jurisdiction and project scope. |
| Misc. materials & waste disposal | $50 | $200 | $600 | Sealants, connectors, bags, disposal fees. |
| Total project (range) | $600 | $2,650 | $6,300 | Assumes standard mid- to high-end components. |
Overview Of Costs
Typical price ranges for converting a single sink to a double sink generally run from about $600 to $6,300, depending on component quality, cabinet layout, and required plumbing changes. For budgeting clarity, estimate ranges include both total project cost and per-unit considerations. The average project falls in the $2,000 to $3,000 band when cabinetry and fixtures are modest, and around $3,500 to $4,500 when premium faucets and more extensive cabinet work are chosen. Assumptions: standard kitchen or bathroom sink, accessible under-sink area, no structural modifications.
Cost Breakdown
The cost components below show how money typically breaks down for this project.
| Category | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $250 | $750 | $2,000 | New faucets, drains, piping, connectors. |
| Labor | $300 | $1,000 | $2,000 | Plumber plus carpenter or general contractor as needed. |
| Equipment | $0 | $150 | $400 | Tools, pipe cutters, fittings, sealants. |
| Permits | $0 | $150 | $500 | Varies by city/county and scope. |
| Delivery/Disposal | $20 | $80 | $250 | Disposal of old parts; delivery of new items. |
| Warranty | $0 | $60 | $200 | Limited warranties on fixtures and workmanship. |
| Taxes & Overhead | $0 | $60 | $300 | Tax on materials; contractor overhead. |
What Drives Price
Key drivers include faucet selection, cabinet configuration, and the complexity of plumbing changes. A single-sink to double-sink conversion may require relocating supply lines, extending drains, or modifying the cabinet interior. The price is higher when the cabinet box must be enlarged or reconfigured, plumbing requires long runs, or premium fixtures are chosen. Assumptions: standard 1.5–2.0 inch drains, unit height compatible with existing countertops.
Cost Drivers
Two niche drivers commonly impact quotes. First, the number of bowls and bowl depth affects cabinet space and plumbing geometry, typically increasing labor by 15–40%. Second, faucet configuration matters: a dual faucet setup or a single unit with two spouts can add $150–$500 in hardware and install time. Per-unit pricing is useful in planning: faucets $100–$350 each, drains $50–$120, and rough-in plumbing $200–$800 depending on distance from existing lines.
Factors That Affect Price
Regional costs vary due to labor rates and permit requirements. Urban markets tend to be higher than rural areas. Local building codes can add inspection fees, and availability of skilled plumbers or cabinet fabricators will influence bids. The project also depends on whether the existing sink cabinet can be repurposed or requires custom cuts. Assumptions: one-wall installation in a typical kitchen or bath.
Ways To Save
Several practical strategies can lower total cost without sacrificing function. Keep the same cabinet footprint if possible; reusing the existing basin and only swapping hardware reduces both material and labor time. Choose standard faucet models instead of premium brands, and combine the project with nearby updates to save on mobilization. Consider DIY minor tasks like removing the old hardware to reduce labor hours. Assumptions: basic plumbing access and mid-range fixtures.
Regional Price Differences
Prices differ by region across the U.S., with typical delta ranges. In the Northeast, expect higher labor rates (often +10% to +25% versus national average). The Midwest typically aligns closer to the national average, while the Southeast can be slightly lower due to lower labor costs. A suburban project may incur higher costs than rural ones due to more complex cabinetry. Assumptions: standard materials; no special zoning constraints.
Labor & Installation Time
Labor hours influence the final price significantly. A straightforward conversion may take 6–12 hours of combined plumbing and cabinetry work, while more complex reconfigurations can require 16–24 hours. Hourly rates for licensed plumbers and carpenters generally range from $60 to $180 per hour, depending on region and expertise. data-formula=”labor_hours × hourly_rate”>
Additional & Hidden Costs
Hidden costs often appear in edge cases. If the plumbing run length is long, material waste or extra connectors may add $50–$300. Structural modifications or cabinet rework could push costs beyond initial estimates. Unexpected permit requirements or safety inspections can add $100–$400. Assumptions: no major structural changes; standard under-sink arrangements.
Real-World Pricing Examples
Three scenario snapshots illustrate typical quotes.
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Basic: New dual faucets, minor cabinet interior rework, short drain run.
- Specs: standard 18″ x 22″ cabinet, two basins not required, mid-range fixtures.
- Labor: 6–8 hours; per-hour $70–$110.
- Totals: $1,000–$1,800; per-unit $500–$900.
- Notes: minimal demolition; no permit required in many locales.
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Mid-Range: Full cabinet reconfiguration, mid-range fixtures, longer drain run.
- Specs: two bowls with shared base, custom drain routing.
- Labor: 10–14 hours; per-hour $90–$140.
- Totals: $2,000–$3,500; per-unit $900–$1,900.
- Notes: possible permit in some jurisdictions.
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Premium: Premium faucets, new cabinetry, long plumbing runs, disposal/warranty upgrades.
- Specs: dual-bowl configuration, high-end fixtures, custom trim.
- Labor: 16–24 hours; per-hour $120–$180.
- Totals: $4,000–$6,300; per-unit $1,900–$3,000.
- Notes: permits and inspections likely; longer lead times.
Assumptions: region, specs, labor hours.