Moving a kitchen sink or adding an island sink in Grand Rapids
Quick answer: Moving a kitchen sink in Grand Rapids usually costs $1,500 to $4,500 for the plumbing. An island sink sits at the high end because the drain needs a vent, often an island loop vent or an air admittance valve where code allows. Expect a permit and an inspection.
- Typical cost
- $1,500 – $4,500
- Plumbing time
- 1 to 3 days
- Permit
- Required
- Hardest part
- Venting the drain
Why does moving a sink cost more?
A sink drain needs three things, and a new spot means building all three again:
- A drain with enough slope to carry water to the main stack.
- A vent so the drain doesn’t gurgle or siphon its trap dry.
- Supply lines for hot and cold water.
The vent is what drives cost. Along a wall, the vent can rise inside the wall. In an island there’s no wall, so the plumber needs another way to vent.
What makes a Grand Rapids home easier or harder?
Many Grand Rapids homes, from Heritage Hill to Kentwood ranches, have full basements. That’s good news. The plumber can run the new drain along the joists below and only open the floor where the sink goes.
These things make the job harder:
- Slab floors with no basement, where concrete must be cut.
- Joists running the wrong way for the drain route.
- Old cast iron or galvanized pipe that should be replaced once it’s opened.
What does it cost?
| Scenario | Typical 2026 range |
|---|---|
| Move sink a few feet along the same wall | $1,200 – $2,500 |
| New island sink, basement below | $2,000 – $3,800 |
| New island sink on a slab | $3,500 – $6,500+ |
| Permit and inspection | Set by your city or township |
These are planning ranges, not quotes. Cabinets, flooring and electrical work are extra.
How do permits work around Grand Rapids?
Moving a sink needs a plumbing permit. In the city, permits come from the Grand Rapids Development Center. Suburbs like Kentwood, Wyoming and Walker run their own building departments. Some townships use the state’s Bureau of Construction Codes. A licensed plumber pulls the permit and schedules the inspections for you.
How an island sink gets plumbed
- Plan the route
The plumber checks joist direction and where the drain can reach the main stack. A basement or crawlspace below makes this far easier.
- Pull the permit
Moving a fixture changes the drain and vent system, so a plumbing permit comes first.
- Rough in the lines
New supply lines, a sloped drain and a vent are installed. Floors are opened only where needed.
- Pass the rough-in inspection
The inspector checks slope, venting and connections before anything is closed up.
- Set the sink after counters
Once counters are installed, the plumber sets the sink, faucet, disposal and dishwasher and tests for leaks.
Sources and further reading
Common questions
What is an island loop vent?
An island loop vent is a drain vent that loops up inside the island cabinet and then back down under the floor to join the vent system. It lets a sink with no nearby wall still vent properly, so the trap doesn’t siphon dry and the drain doesn’t gurgle. It takes more pipe and floor work than a wall vent, which is part of why island sinks cost more.
Can I use an air admittance valve (AAV)?
An AAV is a one-way valve that lets air into the drain so it flows, then closes to keep sewer gas out. Many jurisdictions accept them in certain spots and some don’t. An AAV must stay reachable for replacement, usually inside the sink cabinet. Your plumber will know what your inspector allows before any floor is opened.
Is it cheaper to keep the sink where it is?
Yes, by a lot. Keeping the sink in place usually saves $1,500 or more, because the drain, vent and supply lines already exist. You can still get a new sink, faucet, disposal and dishwasher on the same lines. If the layout works with the sink where it is, keep it there and spend the savings on cabinets or counters.