A bathroom or kitchen plumbing remodel involves much more than replacing a faucet or installing a new sink. Moving fixtures, upgrading outdated pipes, adding new appliances, changing drain locations, and improving water flow can all require careful plumbing planning before construction begins. A professional plumbing remodel ensures your new kitchen or bathroom works as well behind the walls as it looks on the surface.
So if you’re completely gutting a bathroom, creating a more functional kitchen, or simply updating several fixtures, understanding what’s involved can help you plan your project, avoid unexpected problems, and budget for the work ahead. Here’s what Denver-area homeowners need to know before starting a plumbing remodel.
What is a Plumbing Remodel?
A plumbing remodel involves modifying, replacing, or upgrading the plumbing system as part of a larger kitchen or bathroom renovation. The work can range from relatively simple fixture replacements to major changes that require new water supply lines, relocated drains, or updated plumbing connections.
Unlike cosmetic remodeling, such as replacing cabinets, countertops, flooring, or paint, plumbing work affects the systems behind your walls, floors, and cabinets. That means the plumbing needs to be planned before those finished surfaces are installed.
For example, moving a kitchen sink to the opposite side of an island isn’t simply a matter of disconnecting the old sink and connecting the new one. The water supply and drain lines may need to be relocated to accommodate the new layout.
What is Involved in a Bathroom Plumbing Remodel?
Bathroom remodels often involve several plumbing fixtures in a relatively small space. Changing the layout can require significant plumbing work, particularly when you’re moving fixtures rather than simply replacing them in their existing locations.
Shower or Tub Relocation
Moving a shower or bathtub can require relocating both water supply lines and drain piping. Your plumber needs to account for the location of the existing plumbing, the new fixture’s position, and the appropriate drainage requirements.
If you’re upgrading from a standard tub to a larger walk-in shower, for example, the new shower may require changes to the drain configuration and water supply connections.
Toilet Replacement or Relocation
Replacing a toilet in the same location is generally much simpler than moving it. Relocating the toilet requires the drain connection to be moved as well, which can involve opening the floor and modifying the existing waste line.
Because toilet drains are larger than typical fixture drains, their location and slope need to be carefully considered when changing the bathroom layout.
Vanity and Sink Plumbing
A new vanity may have a completely different sink configuration from your existing setup. While a simple faucet replacement or swapping one sink for another in the same location can be relatively straightforward, changing the vanity’s size or location may require modifications to the water supply and drain connections.
Additional Bathroom Fixtures
A remodel may also include installing a bidet, double vanity, freestanding tub, or additional shower fixtures. Each new fixture needs the appropriate water supply and drainage connections, and adding plumbing during a remodel is often easier than attempting to retrofit it later.
What is Involved in a Kitchen Plumbing Remodel?
Kitchen plumbing remodels can involve more than just the kitchen sink. Modern kitchens often include dishwashers, refrigerators with water lines, garbage disposals, pot fillers, and other fixtures or appliances that require plumbing connections.
Kitchen Sink Relocation
Changing the location of your kitchen sink is one of the more involved plumbing modifications. The drain and water supply lines need to reach the new location, and the drain must maintain the proper configuration for reliable wastewater flow.
Island sinks can require additional planning because the plumbing may need to run through the floor rather than a nearby wall.
Dishwasher Installation
A new dishwasher needs both a water supply and a drain connection. If you’re changing your kitchen layout or installing a dishwasher where one didn’t previously exist, the plumbing may need to be modified to accommodate it.
Your plumber can also ensure the dishwasher drain is properly connected to the kitchen’s drainage system.
Garbage Disposal Installation
Adding or replacing a garbage disposal requires the appropriate sink configuration, electrical connection, and drain setup. If your remodel includes a new sink, it’s important to make sure the sink and disposal work with the existing or planned plumbing system.
Refrigerator Water Lines
If you’re installing a refrigerator with an ice maker or water dispenser, your remodel may include adding a dedicated water supply line. This is much easier to address while walls or cabinets are already open than after the entire kitchen has been finished.
When Should Plumbing Work Happen During a Remodel?
Plumbing should be planned early, before cabinets, tile, drywall, flooring, and other finished materials are installed.
The plumbing portion of a major remodel typically happens in stages. First, the existing plumbing may need to be removed or modified. Then, new supply and drain lines are installed or relocated. After the walls and floors are closed up, fixtures can be connected during the finishing stage.
Trying to figure out plumbing after your new cabinets or tile are already installed can create unnecessary delays, additional labor, and damage to finished surfaces.
That’s why it’s important to involve your plumber during the planning stage rather than waiting until the remodeling contractor is ready to install the fixtures.
Do I Need to Replace My Plumbing During a Remodel?
Not necessarily. A bathroom or kitchen remodel doesn’t automatically mean you need to replace every pipe in the room. But remodeling is an excellent opportunity to address aging or problematic plumbing while the area is already being opened up.
Your plumber can evaluate the existing system and help determine whether the current pipes are appropriate for the remodeled space. If the plumbing is old, corroded, damaged, or poorly configured, replacing it during the remodel may make more sense than waiting for a leak or failure later.
The same principle applies to shut-off valves, supply lines, drains, and other components. Replacing an accessible problem now is generally easier than discovering it after your new cabinets or walls are finished.
5 Plumbing Issues to Address Before Remodeling
A remodel gives you a chance to improve the plumbing behind your walls before new finishes hide everything again. Before construction gets too far along, ask your plumber to check for these potential problems.
1. Aging or Corroded Pipes
Old pipes can develop corrosion, pinhole leaks, mineral buildup, and other problems over time. If you’re already opening the walls, addressing deteriorating plumbing may help prevent future water damage.
2. Outdated Shut-Off Valves
Every fixture should have an accessible shut-off valve that allows the water supply to be turned off during repairs. If your existing valves are old, difficult to operate, or leaking, a remodel is a convenient time to replace them.
3. Poor Drain Configuration
Slow drains aren’t always caused by a simple clog. Improperly configured or deteriorating drain lines can contribute to recurring drainage problems. If you’re changing the layout, make sure the new plumbing is designed for reliable drainage from the beginning.
4. Low Water Pressure
If your shower has always had disappointing water pressure or your kitchen faucet struggles to deliver enough flow, a remodel gives you an opportunity to investigate the cause of those water pressure issues. The problem could involve supply lines, valves, mineral buildup, or other plumbing issues.
5. Hidden Leaks
A remodel is also a good opportunity to investigate unexplained water damage, staining, musty odors, or other signs of a hidden leak. Installing beautiful new finishes over an existing plumbing problem won’t make that problem disappear.
Can You Move Plumbing During a Remodel?
Yes, but how difficult it is depends on the fixture, the new location, the existing plumbing configuration, and what’s behind the walls or beneath the floor.
Moving a sink a few inches may require relatively minor modifications. Moving a shower across the bathroom or relocating a kitchen sink to an island can be substantially more involved because the drain and water supply lines have to be extended or rerouted.
The structure of your home also matters. Plumbing modifications in a basement or accessible crawl space may be easier than modifications beneath a concrete slab. In a slab-built home, relocating drains or water lines can involve working through concrete, which can add significant labor and complexity to the project.
Before committing to a new layout, have a professional plumber evaluate the proposed locations. A beautiful floor plan isn’t very useful if the plumbing behind it can’t support the design without major complications.
Do Plumbing Remodels Require Permits?
Plumbing work that changes or installs plumbing systems may require permits and inspections depending on the scope of the project and local requirements. Denver and surrounding municipalities have specific plumbing and building requirements, so homeowners should make sure the work is properly permitted when required.
A licensed plumbing professional can help determine what the project requires and make sure the plumbing work complies with applicable codes. This is especially important for larger remodels involving relocated fixtures, new plumbing lines, or significant changes to the existing system.
Skipping required permits may create problems later, particularly if you sell the home or an issue develops with the plumbing.
How Much Does a Plumbing Remodel Cost?
There isn’t one standard price for a bathroom or kitchen plumbing remodel because every project is different. The total cost depends on the size of the remodel, how much plumbing is being relocated, the accessibility of the existing pipes, the fixtures being installed, and whether unexpected problems are discovered once walls or floors are opened.
A simple fixture replacement will generally require far less plumbing work than moving a shower, toilet, or kitchen sink to a completely new location.
The best way to understand your potential plumbing costs is to have the proposed remodel evaluated before construction begins. A professional can identify the plumbing work involved and provide an estimate based on the actual layout rather than a generic remodeling price.
Why You Should Hire a Professional Plumber for a Remodel
Plumbing is one part of a remodel where mistakes can become expensive quickly. A poorly installed drain, incorrect connection, inaccessible shut-off valve, or improperly supported pipe can create problems long after the remodeling crew has finished.
A professional plumber understands how the new plumbing needs to connect to the home’s existing system while meeting applicable plumbing codes. They can also identify potential issues before they’re buried behind drywall, cabinets, flooring, or tile.
At My Denver Plumber, we can help homeowners plan the plumbing portion of their kitchen or bathroom remodel, from fixture replacements and new connections to larger plumbing modifications. Our goal is to make sure the plumbing works properly before the finishing touches go in.
Plan Your Plumbing Before You Start Your Remodel
A successful kitchen or bathroom remodel isn’t just about choosing the right tile, cabinets, countertops, or fixtures. The plumbing behind those finishes needs to be planned just as carefully.
If you’re replacing a bathroom vanity, installing a new kitchen sink, adding a dishwasher, moving a shower, or completely changing the layout, getting your plumber involved early can help prevent expensive surprises and remodeling delays.
Don’t wait until your walls are open or your cabinets are already installed to figure out the plumbing. Contact us to discuss your bathroom or kitchen plumbing remodel and make sure your new space is built on a reliable plumbing system.
