Fig. 03
Plumbing Rough-In
Drain, vent, and supply rough-in for new or relocated bathroom and kitchen fixtures. We cut, set, and pressure-test before the walls close.
Remodel Plumbing Done Right, From Rough-In to Final Fixture
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Overview
Why Homeowners Choose Graham Plumbing and Drain Cleaning
A realistic bathroom or kitchen remodel budget depends heavily on what's happening behind the walls. Rough-in plumbing work, relocating drains, adding fixtures, or tackling an under-slab rough-in for a new bathroom can range from a few hundred dollars for a straightforward fixture swap to several thousand for a full layout change. Getting that work done right the first time is what separates a smooth remodel from one that stalls at inspection. Graham Plumbing and Drain Cleaning handles the plumbing scope of your remodel from start to finish, including gas lines and supply line upgrades, so your contractor or designer isn't waiting on a plumber who doesn't show. Call (714) 367-4996 to schedule your remodel consultation.
The cost of plumbing rough-in work is driven by how much you're moving. Keeping fixtures in their existing locations keeps labor and materials reasonable. Relocating a toilet across a slab, adding a wet bar, or roughing in an entirely new bathroom in a previously unplumbed space can push costs into the $2,500 to $10,000 or more range depending on access, slab cutting requirements, permit fees, and fixture count. We don't guess at scope and hand you a vague estimate. We walk the job, identify what the slab and existing lines allow, and give you a number you can plan around. Every job is different. Contact Graham Plumbing and Drain Cleaning for an accurate estimate.
(714) 367-4996What the Plumbing Scope of a Remodel Actually Includes
Most homeowners think of plumbing as the faucet and the toilet. The real work happens before any tile goes down. The rough-in phase covers drains, vents, and supply lines set to the correct position for your new layout. After inspection, the trim-out phase installs the fixtures themselves: faucets, toilets, shower valves, garbage disposals, and anything else that connects to water. If your remodel involves moving a sink across the kitchen or adding a second bathroom, that rough-in work may require cutting into the slab. That's not a disaster, but it does require a licensed plumber who knows how to handle under-slab work without compromising your foundation or your drain slope. We don't skip steps to speed up the job.
Why the Rough-In Phase Determines Everything That Comes After
Tile, cabinetry, and countertops are all installed after the rough-in. If the drain is in the wrong spot or the supply lines are set at the wrong height, you're either tearing out finished work to fix it or living with a layout that doesn't function right. That's the hard truth about remodel plumbing. Get the rough-in wrong and the whole project pays the price. Graham Plumbing and Drain Cleaning coordinates directly with your general contractor or designer before we touch anything. We confirm fixture specs, rough-in dimensions, and local code requirements up front so there are no surprises at inspection. Orange County building departments enforce these standards and a failed inspection adds weeks to your timeline.
Bathroom and Kitchen Remodel Services We Handle
Fig. 04
Under-Slab Work
Adding a bathroom where there wasn't one requires breaking into the slab to set new drain lines. We handle the cutting, plumbing, and concrete patching.
Fig. 05
Fixture Trim-Out
Faucets, toilets, shower valves, tub spouts, garbage disposals, and dishwasher connections installed and tested at final walkthrough.
Fig. 06
Supply Line Upgrades
Older Orange County homes often have galvanized supply lines running to the kitchen or bath. We replace them with copper or PEX during your remodel so you're not building around failing pipe. See our repiping service for full-home options.
Fig. 07
Water Heater Coordination
A bathroom addition or kitchen remodel sometimes exposes an undersized water heater. We'll flag it and handle the upgrade if it's needed. More on water heater repair and replacement.
Fig. 08
Leak Detection Before Work Begins
If you're already opening walls, that's the right time to check for hidden leaks in supply or drain lines. We use non-invasive methods to confirm what's there before you tile over it. Our leak detection service is a smart first step on older homes.
What Good Remodel Plumbing Looks Like
Finished remodel plumbing isn't just about whether the faucet turns on. It's about drain slope, proper venting to prevent siphoning, correct trap depth, and connections that don't rely on flex hose to make up for poor rough-in placement. When we finish rough-in, every drain is set to code slope, every supply valve is accessible, and everything is pressure-tested before we call for inspection. After trim-out, we test every fixture in front of you, confirm there are no leaks at the supply connections, and verify the drains are flowing clean. We won't hand you a finished bathroom and leave before running water through it. That's not how we work.
When to Call a Plumber vs. Your General Contractor
A general contractor manages the overall remodel. The licensed plumber manages the plumbing scope within it. These are not the same thing and they can't be. In California, plumbing work requires a licensed contractor. Your GC may have subs they use, but you have the right to hire your own plumber directly. If you're managing your own remodel without a GC, calling Graham Plumbing and Drain Cleaning early means you get the rough-in scheduled before tile or cabinet delivery backs you into a corner. The one thing we won't do is act as a general contractor. We're a licensed plumbing contractor. We scope, permit, and execute the plumbing work, and we coordinate with whoever else is on the job. That's our lane and we stay in it.
Orange County Remodel Plumbing: What's Different Here
Most OC residential construction is slab-on-grade. There's no crawl space to access drain lines from below. Adding or relocating a fixture almost always means cutting concrete, which requires the right equipment, proper concrete repair, and a final inspection that confirms the slab is sealed correctly. Post-war homes in neighborhoods like Garden Grove, Anaheim, and Santa Ana were built with galvanized supply lines that are now 50 to 70 years old. Opening walls for a kitchen or bathroom remodel is often the first real look anyone's had at those lines in decades. We'll tell you what we find, honestly. If the pipe is failing, we'll recommend whole-home repiping so you're not remodeling over a problem that surfaces two years later.
Ready to Get Your Remodel Plumbing Scheduled?
Whether you're a homeowner coordinating your own project or a contractor who needs a reliable plumbing sub, Graham Plumbing and Drain Cleaning is available for same-day consultations throughout Orange County. Call (714) 367-4996 and let's talk through your project.
Common questions
A few things people ask us regularly.
01 What is a realistic budget for a bathroom remodel?
The plumbing portion of a bathroom remodel typically runs between $500 and $3,500 for a straightforward refresh where fixtures stay in place. If you're moving a toilet, relocating a shower, or roughing in a new bathroom on a slab foundation, costs can climb to $5,000 to $10,000 or more depending on slab access, permit fees, and fixture count. Every job is different. Contact Graham Plumbing and Drain Cleaning for an accurate estimate.
02 What does a $10,000 bathroom remodel look like?
At that budget, you can typically cover a full fixture replacement, new shower or tub installation, toilet relocation, updated supply lines, and rough-in for a secondary vanity. If the existing plumbing is in decent shape and you're not moving drain locations across the slab, the plumbing scope alone should leave room in that budget for tile, vanity, and finishes. A plumber who tells you there's no way to know without seeing the job is being straight with you.
03 Which is cheaper to remodel, a kitchen or a bathroom?
Bathrooms are generally less expensive from a plumbing standpoint because the fixture count is lower and the runs are shorter. Kitchens get expensive when you're adding an island sink, relocating the main sink to the other wall, or running a new gas line for a range. Either way, the variable that drives plumbing cost more than anything else is how far and how deep you're moving things.
04 What is a realistic budget for a kitchen remodel?
Kitchen plumbing for a standard remodel where the sink stays put usually runs $300 to $1,500 for supply line upgrades, drain replacement, and fixture installation. A full kitchen relayout involving a new sink location, island plumbing, dishwasher rough-in, and a garbage disposal can push the plumbing scope to $2,000 to $6,000 or more. Every job is different. Contact Graham Plumbing and Drain Cleaning for an accurate estimate.
05 What is involved in a plumbing rough-in for a new bathroom?
Rough-in means setting the drain and vent lines and supply stubs before walls are closed. For a slab-on-grade home, that includes breaking into the concrete to set the toilet flange, shower drain, and any sink drains at the correct depth and slope. Then the slab is patched, inspected, and the supply lines are roughed in through the walls. Rough-in has to pass a city inspection before any tile or fixtures go in.
06 Do I need a permit for plumbing work during a bathroom or kitchen remodel?
Yes. Any time you move or add plumbing fixtures in California, a permit is required and the work must be inspected. Pulling permits is standard practice for licensed contractors in Orange County. Unpermitted plumbing work can create problems when you sell the home and may not be covered by homeowner's insurance if a leak causes damage. Graham Plumbing and Drain Cleaning handles the permitting process as part of the scope.
07 Can you work directly with my general contractor or designer?
Yes, and that's often the most efficient setup. We coordinate rough-in timing with your GC's schedule so the plumbing inspection clears before tile delivery. We confirm fixture rough-in dimensions with your designer before setting drains. The goal is to run the plumbing scope without holding up any other trade. We've worked on remodels across Orange County and know what GCs and designers need from the plumber to keep a project on schedule.