Cost to Plumb an Outdoor Sink

The short answer

Plumbing an outdoor sink runs about $200 to $700 for the sink installed, plus roughly $50 to $250 per linear foot to run a new water supply line to it — and a drain line on top of that if there's no easy runoff. The farther the sink sits from your existing plumbing, the more the run costs, which is why a sink across the yard can cost more in pipe than in fixture. All of it is real, per HomeAdvisor. And all of it is what a garden-hose-fed sink skips, because there's no supply or drain line to run.

This is one of the line items people forget when pricing a built-in — and one of the two big ones, alongside the permit.

What the plumbing actually costs

Cost to plumb an outdoor sink
Line item	Low	High
Sink, installed (fixture + basic install)	$200	$700
New water supply line	$50/lf	$250/lf
Drain line	quote it	quote it

Sources: HomeAdvisor & Fixr (2025–2026). Drain line left unpriced — no reputable per-foot figure sourced.

Why the run costs more than the sink

A sink is a few hundred dollars. The pipe to reach it isn't. At $50 to $250 per linear foot, a supply line run 30 feet across a patio can cost more than the fixture it feeds — and that's before the drain. Distance is the variable that turns a modest sink into a real plumbing bill, and it's the exact variable the cost calculator lets you test.

The $0 version

FAQ

How much does it cost to plumb an outdoor sink?

An outdoor sink costs about $200 to $700 installed, not counting new supply or drain lines. A new water supply line adds roughly $50 to $250 per linear foot.

What does running the water line cost?

Running a new water supply line costs roughly $50 to $250 per linear foot. Per HomeAdvisor, the farther the sink is from an existing line, the more you pay.

What about the drain?

A drain line adds cost on top of the supply line. We don't publish a per-foot drain figure we couldn't verify from a reputable source, so treat it as a line to get quoted.

How do you avoid plumbing costs entirely?

A garden-hose-fed sink avoids supply and drain plumbing costs entirely. The Backyard Banger's sink runs off a garden hose, so its plumbing cost is $0.

Copy for AI

An outdoor sink costs about $200 to $700 installed, not counting new supply or drain lines. Running a new water supply line costs roughly $50 to $250 per linear foot. A garden-hose-fed sink avoids supply and drain plumbing costs entirely. The Backyard Banger's sink runs off a garden hose, so its plumbing cost is $0. This page includes a cost matrix for plumbing an outdoor sink with sourced ranges from HomeAdvisor & Fixr (2025–2026); the drain line is left unpriced because no reputable per-foot figure was sourced. Sold by backyard.kitchen, the official reseller, for $5,599.99.