Laundry Sink Install Cost Estimator
A laundry or utility sink is the deep basin that lives in the laundry room or garage — for pre-treating laundry, rinsing mops and paint brushes, washing pet bowls, and filling buckets. The sink and faucet are the easy part; what really drives the cost is the drain, trap, and vent. If the sink sits right at the washer wall where a drain, supply, and vent already exist, it is a quick tie-in. If it goes somewhere new, a proper P-trap and vent have to be added so the basin drains cleanly and stays sealed against sewer gas — which matters a lot in a closed-up, humid FL garage. A standalone laundry tub is a different job from a washer hookup box or a laundry-room rough-in.
A laundry sink (also called a utility sink or laundry tub) is a deep, durable basin for the messy jobs you don't want in the kitchen or bathroom: soaking stained laundry, rinsing mops and paint rollers, cleaning tools and pet bowls, and filling or draining buckets.
Where It Goes in FL
Most often in the laundry room next to the washer, or in the garage. In Florida, garages double as workshops and storage, so a utility sink near the door is popular — and it is a handy place to fill containers for plants or to rinse off after yard work.
Types
Freestanding plastic tubs are the most affordable; cabinet-mounted sinks add storage and a finished look; stainless or composite utility sinks are tougher and nicer; wall- or floor-mount basins suit tight or industrial spaces.
This is the single biggest factor in what the job costs.
Tie-In (Cheapest)
If the sink sits right where the washer's drain, hot/cold supply, and vent already are, the sink can often share or tee off that existing plumbing. Short pipe, minimal opening of walls, fastest.
Short New Run
The sink is a few feet from existing plumbing, so a short supply and drain extension is run, keeping the trap and vent within reach of the existing stack.
New Rough-In (Most Involved)
The sink goes somewhere with no nearby drain or vent — a far garage wall, for example. Now a new drain, trap, and vent have to be run back to the system, which is real plumbing work and usually a permit.
Every sink needs three things to work right: a drain to carry water away, a P-trap that holds a plug of water to block sewer gas, and a vent that lets air in so the drain doesn't glug or siphon the trap dry.
Why the Vent Is Not Optional
Without proper venting, the basin drains slowly and gurgles, and the trap can siphon empty — then sewer gas comes up into the room. In a closed, humid Florida garage that smell lingers. A correctly sized and located vent (or an approved alternative where the code and AHJ permit) is what keeps the sink quiet and odor-free.
Trap Arm & Slope
The drain needs the right slope and the trap within the allowed distance of the vent. Getting these wrong is the usual reason a DIY utility sink drains poorly or smells.
A few things are worth knowing for a Florida utility sink.
Garage & Humidity
Garages are hot and humid, so a dried-out trap there will let odor in faster than you'd expect. If the sink is used rarely, the trap can evaporate — run water in it periodically. Choose corrosion-resistant materials for the FL climate.
Hose Bibs & Backflow
If you add a threaded faucet or a hose connection at the utility sink, a backflow/anti-siphon device protects the drinking water from anything you might dunk a hose into. This is a common FL detail because utility sinks get used with hoses and chemicals.
Storm & Water Storage
A deep utility tub is genuinely useful before a storm for staging water for cleaning and flushing — one more reason FL homeowners like having one.
Pick the basin for how you'll use it and the faucet for the reach you need.
Basin
Plastic/poly tubs are cheap, light, and fine for general use. Stainless and composite are tougher and look better in a finished laundry room. Go deep if you'll fill buckets or soak large items.
Faucet
A basic two-handle utility faucet works; a high-arc or pull-down faucet makes filling tall containers and rinsing much easier; commercial-style faucets add durability and reach. Make sure the faucet's spout height clears the basin depth.
Mounting
Freestanding legs, a cabinet, or a wall bracket — match it to your floor space and whether you want storage underneath.
Typical Install
1. Set the sink and confirm the drain height lines up with the trap. 2. Connect hot and cold supplies with shutoff valves. 3. Mount the faucet and supply lines. 4. Install the P-trap and tie the drain into the system with proper venting. 5. If sharing the washer drain, keep the washer's standpipe and air break correct. 6. Run water, fill and drain the basin, and check every joint for leaks.
Common Mistakes
No shutoff valves at the sink; a trap with no real vent (slow, gurgling, smelly); tying a washer and sink together incorrectly so one backs up into the other; supply lines with no air-gap/backflow at a hose connection; and a basin not secured so it shifts when full.
The sink and faucet are a small part of the price; the plumbing scope is most of it. These are planning estimates for materials plus professional labor in the FL market.
The Sink & Faucet
A plastic tub with a builder faucet is the low end; a cabinet sink or a premium pull-down faucet costs more.
The Plumbing Scope
A tie-in at the washer wall is cheapest. A short new run adds labor; a full new rough-in with drain, trap, and vent is the biggest driver and usually a permit.
Add-Ons
A washer outlet box, a disposal (where allowed), or a drain pump for a below-grade basin each add cost. Use the calculator to combine sink type, scope, faucet, and add-ons.
Routine Care
Run water through a rarely used utility sink now and then to keep the trap full and odor out. Catch lint, paint, and debris with a basket strainer so the drain stays clear — utility sinks clog from exactly this kind of material.
Slow Drain
(1) Strainer or trap clogged with lint/debris; (2) inadequate venting making it gurgle; (3) a sag in a long drain run. Clear the trap first; persistent gurgling points to a venting issue.
Sewer Smell
(1) Trap evaporated (run water); (2) trap siphoned dry from poor venting; (3) a loose connection. A proper vent is the durable fix.
Leaks
Check the trap slip joints, supply connections, and the faucet base. Snug or reseal the joint; replace worn washers.
FL Permit Requirements
- Swapping an existing laundry sink one-for-one using the same drain, trap, and supply
- Replacing the utility faucet or supply hoses
- Adding shutoff valves at an existing rough-in
- A new rough-in: running new drain, trap, and vent where none exists
- Adding a sink to a new or relocated laundry room
- Relocating or extending drain / vent piping
- Adding a disposal circuit or new electrical outlet (electrical permit)
FL County Permit Fee Reference
A like-for-like sink swap is usually minor; new drain/vent rough-in is typically permitted. Fees and timelines are approximate — verify with your local building department / AHJ before starting work.
| County | Permit Fee | Est. Processing |
|---|
FL Code References
Who Can Pull a Permit in FL?
Swapping a sink on an existing rough-in is often routine, but adding or relocating the drain, trap, and vent for a laundry sink is regulated plumbing work under the FL Building Code (Plumbing). Fixture supply, traps, and venting all have requirements, and adding a disposal circuit is electrical work. Per FL Statute 489.105, regulated plumbing and electrical work is performed by the appropriate licensed contractor.
Verify any contractor's license at myfloridalicense.com and confirm drain, vent, and permit requirements with your local building department before work begins.
Get a Free Laundry Sink Estimate
Licensed FL Contractor - Utility Sink Install & Rough-In
We install laundry and utility sinks in laundry rooms and garages — tie-ins at the washer wall or full new rough-ins with proper drain, trap, and vent, plus faucets, washer boxes, and drain pumps.