How Much Does Sink Installation Cost in Redmond WA?
Eastside Repipe And Plumbing handles sink installation Redmond WA homeowners need for kitchen sink installation King County WA, bathroom sink installation Eastside Seattle, and sink replacement plumbers Bellevue area projects. We install drop-in, undermount, farmhouse, and vessel sinks — including faucet installation, supply line connection, and drain assembly — with owner Ramin Shahbaziasl involved in every job.
By Ramin Shahbaziasl, Owner · Last updated July 2026
How Much Does Sink Installation Cost in Redmond WA?
According to bens.plumbing's April 2026 Seattle cost guide, kitchen sink replacement in Seattle typically runs $500 to $1,200, with more complex installations up to $1,500. Labor alone runs $150 to $300 for a standard job, reflecting Eastside plumber rates of $120 to $180 per hour.
Here's how cost breaks down by scenario for Redmond and the Eastside:
How Long Does Kitchen Sink Installation Take?
Wondering how long does sink installation take in Redmond? Most installations complete in one to three hours on-site depending on the type and whether complications arise:
Drop-in sink replacement (same cutout size) — one to two hours; existing drain and supply connections are reused with minimal modification
Undermount sink replacement — two to three hours; countertop sealant application and curing time, plus P-trap alignment
Farmhouse / apron-front sink — three to four hours; cabinet face modification, fitting, and drain reconfiguration
Bathroom vanity sink — one to two hours for a standard vanity top; longer if supply valves are corroded and need replacement
New installation from scratch — four to six hours; includes drain rough-in and supply line run if not already in place
What adds time:
Corroded shutoff valves under the sink that need replacement before the new sink connects — common in Redmond's 1980s–1990s housing stock
Countertop cutout that doesn't match the new sink's dimensions — requires either a new cutout or a different sink selection
Supply lines that are original and brittle — worth replacing during the installation rather than leaving failure-prone lines behind a new sink
Can I Install a Sink Myself?
A drop-in sink replacement — same cutout, existing drain and supply connections in good condition — is a reasonable DIY task for a homeowner comfortable with basic plumbing. The process involves disconnecting supply lines and drain, lifting out the old sink, setting the new one, and reconnecting. Most hardware stores stock everything needed.
DIY is reasonable when:
It's a drop-in sink in an existing cutout that the new sink fits without modification
The shutoff valves under the sink operate correctly and aren't corroded
The P-trap and drain connections are standard and undamaged
The countertop doesn't need to be cut or modified
Professional installation is the better call when:
You're installing an undermount sink — the countertop seal and adhesive process is unforgiving; an improperly sealed undermount causes water damage to the cabinet below
You're installing a farmhouse sink — cabinet modification is required and getting it wrong means a damaged cabinet or a sink that's not level
The shutoff valves are original and haven't been operated in years — forcing a corroded valve can break it, creating an immediate water emergency
It's a new installation with no existing drain stub-out — cutting into the drain system and adding a new wet wall connection requires a licensed plumber
As the top rated plumbers for sink installation in the Seattle Eastside, Eastside Repipe And Plumbing handles every configuration — including the complications that turn a DIY job into a professional call.
Which Sink Material Is Best for PNW Kitchens in Redmond?
This is worth addressing specifically for Redmond and the Eastside because water chemistry matters for sink longevity. Redmond's water from the Seattle Public Utilities watershed is soft and low in minerals — favorable for most sink materials and meaningfully different from hard-water markets where mineral deposits accelerate staining and deterioration.
Here's how common sink materials perform in Redmond's soft-water environment:
For most Redmond kitchen sink installation projects: stainless steel (16 to 18 gauge; heavier is better) is the right call — durable, easy to maintain in soft water, and the most economical choice in the mid-range. Composite granite is worth the upgrade for high-use kitchens where noise and scratch resistance matter.
For Redmond bathroom sink installation: porcelain and composite are both good choices; soft water reduces the mineral staining that makes hard-water porcelain maintenance difficult.
What Is Included in Sink Installation?
A complete sink installation Redmond WA service from Eastside Repipe And Plumbing includes:
Disconnection and removal of the existing sink
Countertop preparation — cleaning, sealant removal, checking cutout dimensions
Sink placement and sealing (silicone at the rim for drop-in; adhesive sealant for undermount)
Drain assembly installation — basket strainer, drain body, P-trap connection
Supply line connection to existing shutoff valves
Faucet installation if included in the scope
Shutoff valve condition assessment — we note any valves that are corroded or stiff and recommend replacement during the visit rather than leaving failure-prone valves behind the new sink
Full leak check under pressure before we leave
Cleanup and disposal of the old sink
If the job involves a new countertop cutout, countertop-specific work (for farmhouse sinks), or new shutoff valve installation, those are scoped and priced at the estimate — not discovered on the day of installation.
Do Plumbers Install Both Sink and Faucet?
Yes — and bundling faucet installation with sink installation is the most economical approach. Adding a faucet installation at the same visit runs $80 to $400 depending on the faucet type, compared to a separate service call that carries its own minimum labor charge.
Practical reasons to do both at the same time:
The plumber is already under the sink with the supply lines disconnected — adding a faucet swap takes 20 to 45 minutes at that point
Drilling a new faucet hole (if the new sink has a different hole configuration) is done before the sink is sealed into the countertop
Matching the sink and faucet finish in one visit ensures compatibility
Eastside Repipe And Plumbing installs all major faucet brands — Moen, Delta, Kohler, Pfister — as part of our sink installation service. Supply the faucet yourself or ask us to source it; we quote both options.
Can a Sink Be Moved to a New Location During Installation?
Yes — but it's a meaningfully different and more expensive project than a same-location replacement. Moving a sink requires:
Drain line extension or rerouting. The King County Wastewater Treatment system requires proper venting for all drain connections. Moving a sink to a new location means either extending the existing drain line with proper slope ($1/4 inch per foot minimum) or adding a new vent — both of which involve opening the wall or cabinet space.
Supply line extension. Hot and cold supply lines need to reach the new location. For short moves (within the same cabinet run), this is straightforward. For moves across the kitchen — for example, from one wall to an island — this involves routing lines under the floor or through walls.
Countertop modification. The old location needs to be patched or the countertop replaced; the new location needs a cutout.
Permit consideration. Moving a sink to a new location involves new plumbing rough-in, which may require a permit through the City of Redmond. Same-location sink replacement generally doesn't require a permit. We assess permit requirements during the estimate.
For a minor move (a few inches within the same cabinet footprint to accommodate a new sink size), we can often adjust the drain configuration without major work. For a true relocation, we walk through the full scope and cost during the estimate before any commitment.
Do I Need a Permit for Sink Installation in Redmond WA?
For a standard sink replacement in the same location: generally no permit is required. Replacing a sink without moving the drain connection or supply lines is maintenance work under the City of Redmond building permit requirements.
For a new sink installation in a location with no existing plumbing: yes. New drain rough-in and supply line runs constitute new plumbing work requiring a permit. Washington State L&I requires a licensed plumbing contractor for all new plumbing work in Washington. Eastside Repipe And Plumbing is a licensed plumbing contractor — we assess permit requirements at the estimate and handle filing when needed.
Best Sink Installers Near Redmond WA: Why Eastside Repipe
Eastside Repipe And Plumbing is owner-operated — Ramin Shahbaziasl is personally involved in every sink installation Redmond WA job. As the best sink installers near Redmond WA for Eastside homeowners, here's what we bring to every installation:
Written estimates before work starts — no verbal-only pricing; you know the cost before we arrive
Shutoff valve assessment included — we check valve condition during every sink installation and flag anything that needs replacement; it costs far less to replace a corroded valve now than to respond to a valve failure six months later
Faucet installation available same visit — source the faucet yourself or we'll source it; we install all major brands
Permit handling — we assess whether your job requires a permit and handle filing when it does
Related services: garbage disposal installation available same visit; see our garbage disposal installation Redmond WA guide
Frequently Asked Questions
1. Do I need a permit for sink installation in Redmond WA?
For a standard same-location sink replacement: generally no permit required. For a new installation with new drain rough-in or supply lines: yes, a permit is required through the City of Redmond. Washington State L&I requires a licensed plumbing contractor for all new plumbing work. Eastside Repipe handles permit assessment and filing on every job.
2. Can a sink be moved to a new location during installation?
Yes — but it's a more involved project than a same-location replacement. Moving a sink requires drain line rerouting with proper slope and venting, supply line extension, and countertop modification. True relocations may require a City of Redmond permit. We assess the full scope and cost during the estimate walkthrough.
3. How long does kitchen sink installation take?
Standard drop-in replacement takes one to two hours. Undermount replacement takes two to three hours. Farmhouse sink installation takes three to four hours due to cabinet modification. A new first-time installation takes four to six hours. Corroded shutoff valves or countertop cutout mismatches are the most common causes of extended timelines.
4. What is included in sink installation?
Old sink disconnection and removal, countertop preparation, sink placement and sealing, drain assembly installation, supply line connection, faucet installation if scoped, shutoff valve condition check, full leak test, and cleanup. Countertop modification and shutoff valve replacement are additional scope items quoted at the estimate.
5. Do plumbers install both sink and faucet?
Yes — and bundling faucet installation with sink installation is the most economical approach. Adding a faucet at the same visit costs $80 to $400 depending on the faucet, compared to a separate callout with its own minimum labor charge. Eastside Repipe installs all major faucet brands.
Related Services
Contact Eastside Repipe And Plumbing
Eastside Repipe And Plumbing 12005 NE 12th St # 29 Bellevue, WA 98005 Phone: 425-331-2011 Hours: Available 7 days a week
Serving Redmond, Bellevue, Kirkland, Bothell, Kenmore, Sammamish, Issaquah, and all of King County, WA.
