Plumbing a Northern Michigan Home Remodel: What to Plan Before You Start

Summer is the busiest season for home remodels in Northern Michigan — and for good reason. The weather cooperates, contractors are available, and if you're doing work on a seasonal property, this is the window you've got. Whether you're renovating a bathroom, expanding a kitchen, adding a laundry room, or finishing a basement, at some point the project is going to involve a plumber.

The problem is that most homeowners don't loop in a plumber until something goes wrong. They plan the tile, pick the fixtures, hire the general contractor — and only call a plumber when the wall is already open and nothing lines up the way it was supposed to. That's the expensive version of this story.

Here's how to do it the smarter way.

Plumbing Is a Rough-In Problem, Not a Finish Problem

Most people think of plumbing as the fixtures — the faucet, the showerhead, the toilet. But the hard part happens before any of that goes in. The rough-in is the phase where supply lines, drain lines, and vent stacks get moved, extended, or installed from scratch. Once the walls close up, changing any of it becomes expensive.

If you're moving a sink across the room, adding a second bathroom, or converting a half bath to a full bath, the rough-in work is where a licensed plumber earns their keep. Get a plumber involved at the planning stage — before demo, ideally — and you'll avoid the most common and costly remodel surprises.

What Actually Requires a Licensed Plumber

In Michigan, any work involving new drain, waste, and vent (DWV) lines or new supply line installations in a remodel requires a permit and a licensed plumber. That includes:

• Moving or adding a toilet, sink, tub, or shower
• Adding a bathroom or laundry room where one didn't exist
• Relocating a water heater
• Replacing drain lines or extending supply lines
• Adding an outdoor spigot or utility sink

Swapping out a faucet or replacing a toilet with a new one in the same location? That's a homeowner job. But if anything is moving or being added, assume you need a permit and a licensed plumber. Skipping the permit might save a few hundred dollars upfront — and cost you thousands if you ever sell the house and an inspector finds unpermitted plumbing work.

Remodeling Is a Good Time to Address Existing Problems

Once the walls are open, you can see exactly what you're working with. And in Northern Michigan homes — especially older ones — what you find is often worth dealing with while you're already in there.

Common things that come up during remodels:

• Galvanized steel supply lines — common in homes built before the 1970s, these corrode from the inside out and restrict flow. When walls are open, replacing them with copper or PEX is usually straightforward.
• Cast iron drain lines — older homes often have cast iron that's scaled, cracked, or partially collapsed. If you're opening floors anyway, it's worth having a plumber take a look.
• Outdated water heaters — if yours is already 10+ years old and you're doing a significant remodel anyway, this is a good time to upgrade. Especially if the remodel involves adding fixtures that will put more demand on the system.
• Hard water damage — Northern Michigan well water is hard on fittings, valves, and supply lines. If you're seeing scale buildup or discoloration during demo, that's worth addressing before you put the walls back.

Bathroom Remodels: The Most Common Remodel Call We Get

Bathroom remodels are the bread and butter of remodel plumbing. A full gut-and-redo means new supply and drain lines, new fixture rough-ins, and usually a conversation about whether to keep the existing layout or change it.

Keeping fixtures in the same location is always cheaper — the rough-in is already there, and you're just swapping hardware. Moving a toilet even a few feet requires cutting into the floor to relocate the drain, which adds labor and material cost. Moving a shower or tub across the room can be a full day of work before any tile goes down.

If you want to change the layout, that's fine — it's often worth it. Just go in with realistic expectations about what it costs, and get the plumber's input before you finalize the design. A good plumber will tell you which layouts are simple and which ones involve a lot of extra work.

Kitchen Remodels: Less Drama, Usually

Kitchen remodels tend to be simpler on the plumbing side, as long as you're not moving the sink. Most kitchen plumbing work comes down to updating supply valves and drain connections to match new fixtures or appliances — dishwasher hookups, refrigerator water lines, new faucet installs.

Where it gets more complex: adding a pot filler, running a water line to an island, or adding a prep sink in a new location. If any of those are on your list, loop in a plumber before the cabinets go in. Running supply lines through finished cabinets after the fact is a headache nobody wants.

Adding a Basement Bathroom

Finishing a basement in Northern Michigan often means adding a bathroom — and if your fixtures are going to sit below the sewer line, you'll need a sewage ejector pump to move waste uphill. This is a permanent installation that needs to be sized and installed correctly. An undersized ejector pump is a problem you don't want to discover the first time someone flushes downstairs.

Talk to a plumber before you finalize where the bathroom goes. The location relative to the main stack and sewer line will affect cost and complexity significantly.

The Simple Rule: Call Before You Demo

You don't need to have every detail figured out before calling a plumber. In fact, the earlier you bring one in, the better — before demo, before permits, even before you finalize your design. A quick walkthrough with a plumber can tell you what's realistic, what's going to add cost, and what to watch out for once the walls come down.

It's a lot easier to adjust your plans on paper than to adjust your plans after a contractor has already torn out the wall.