Rough-in plumbing before a San Diego remodel

Rough-in plumbing is the supply and drain work that happens before drywall, tile, or cabinets go in. On a San Diego remodel, that means locking fixture locations, leaving the pipes visible for inspection, and coordinating with the general contractor so nobody covers a line that still needs a test. Dollar ranges and permit-fee shopping live on bathroom remodel plumbing in San Diego. This page is the scope before finishes.

Call (858) 400-4417 and we connect you with a licensed plumber for a written quote. See bathroom and kitchen plumbing for the service hub. Finish fixtures are a later visit on fixture installation.

What rough-in covers before any finish

People mix two appointments. Rough-in is the hidden piping. Trim-out is the visible hardware.

At rough-in, the plumber you hire sets hot and cold supply, the drain, waste, and vent piping, and the in-wall parts that have to exist before tile. That includes shower valve bodies, a tub drain, a toilet closet bend, sink stub-outs, and a washing-machine box if the laundry is in the remodel. The pipes get strapped. They get tested. They stay exposed until the building counter has had its look.

Trim-out waits. Toilets, faucets, shower trim, stops under a sink, and caulk go on after the surfaces exist. If someone tries to set a toilet during rough-in, they are working in the wrong week.

Kitchen remodels use the same split. Supply and drain for the sink, dishwasher branch, and disposal stub happen while the walls and floor can still change. Hooking the faucet and the dishwasher is later. If the kitchen is the job, our kitchen plumbing page covers that room. Do not copy a bath layout onto a kitchen stack.

Supply and drain locations that lock the layout

Once tile, a slab patch, or a cabinet run is in, moving a toilet eight inches is a different job. Rough-in is when the layout is still cheap to change on paper and hard to undo later.

Buy the fixtures first. Toilets do not all sit the same distance from a finished wall. Shower valves do not all sit at the same height. Sinks do not all drain in the same place. The plumber sets pipe to the model in the box, not to a catalog memory. If the tile is already on the truck and the toilet is still “we will pick it later,” stop and pick it.

Walk the room with the plumber and the general contractor in the same hour. Mark the toilet, the shower, the tub, the sink, and any hose bibb that is part of the permit. Say which walls are plumbing walls. A second-floor bath over a finished living room in North Park or La Mesa is not the same mark-up as a slab ranch in Mira Mesa where the only finish below the bath is dirt and concrete.

We will not invent a required centerline here. Ask the plumber to set the closet bend and the shower valve to the fixture packet you hand them. Bring spec sheets, not a Pinterest screenshot.

If the remodel also swaps high-water-using fixtures, that is not a trim-only afterthought. California SB 407 requires owners to replace noncompliant plumbing fixtures on a timeline, and for single-family homes it has been a condition of building permits for major improvements since January 1, 2014. The statewide replacement date for single-family homes was January 1, 2017. Sellers still have to disclose fixture compliance. What counts as noncompliant is a flow-rate question. Confirm the current numbers with the building official and the fixture spec sheets. We will not invent those rates here. The water-conserving fixture law page is the place to start that conversation.

Inspections before walls close

A named, city-by-city two-inspection script for remodel rough-in is not in our verified claims ledger. We will not invent the sequence or the fee. The practical rule still holds: the building official wants to see the pipes before they disappear.

Ask City of San Diego Development Services, or the building counter for that address, what they want to see at rough and at final. Unincorporated county addresses go through the County of San Diego. Chula Vista, Encinitas, Carlsbad, Oceanside, El Cajon, and the other cities run their own counters. Do not assume San Diego’s path is Encinitas’s path.

The plumber should pressure-test supply and prove the drains before anyone calls for an inspection. We will not invent a slope number or a drain size as a published code quote. Those details belong to the plumber and the inspector on this job. If a shower pan is in the scope, it needs its own water test before tile. Covering a failed pan is how a bath gets torn out twice.

Even work under California’s contractor license threshold can still need a plumbing permit. The license exemption in Business and Professions Code section 7048 is $1,000 for casual, minor work as of January 1, 2026. It does not apply if the job is part of a larger operation, if contracts are split to stay under the cap, if someone advertises as a contractor, or if they hire another person to do the work. A remodel rough-in is not casual patch work.

A licensed plumber often pulls the permit as part of the contract and schedules the inspection. A homeowner can apply. If you apply, you own the inspection. We do not set the fee.

If you hire, verify the license at the CSLB license check. Search by license number, business name, or personnel name. The database is down Sundays 8 p.m. through Mondays 6 a.m. for maintenance. California’s C-36 classification covers a means for a supply of safe water and the proper disposal of fluid waste, including piping and venting. Forced warm-air heating units sit outside that classification. Individual contractor capabilities still vary.

Lead-free rules apply to the potable supply side. California AB 1953 and the federal Safe Drinking Water Act both set “lead-free” at a 0.25 percent weighted average across wetted surfaces for pipes, fittings, and fixtures that convey water for drinking and cooking, and 0.2 percent lead for solder and flux. Toilets, tub fillers, and shower valves have different federal exemptions. The plumber on site should use parts meant for the water they actually carry.

Slab versus raised foundation

San Diego is two construction habits sharing one county.

Raised cottages in North Park, Kensington, South Park, Golden Hill, and older Coronado give the plumber a crawl. Drain moves are still work. They are not a jackhammer in the living room. The crawl can be tight, wet, and full of old cast-iron or galvanized that was never meant to be the finished plan. Say if you have standing water or no hatch.

Slab tracts in Mira Mesa, Rancho Penasquitos, Santee, Otay Ranch, and much of Chula Vista hide the drains in or under the concrete. Keeping the toilet and shower where they are is the layout that avoids a slab cut. Moving them is a concrete job plus a plumbing job. We will not invent a per-fixture demolition price. Ask for that line in the written quote if the layout actually moves.

Second-floor work is its own access problem either way. A bath over a kitchen in University Heights or La Mesa may open from the ceiling below. Protect that room. A slab-on-grade single story in Clairemont does not have that ceiling. It has the slab.

If a drain problem is past the house and toward the street, that is not remodel rough-in. In San Diego, property owners are responsible for the sewer lateral from the property to the connection with the sewer main, which may be in the street, on an easement, or in a canyon. Keep that as a separate conversation.

Coordinating with the general contractor

Rough-in fails when the plumber and the builder never stand in the room together.

The usual sequence is framing, then plumbing rough-in, then electrical and other trades, then inspection, then insulation and drywall, then finishes, then the plumber’s trim-out. Plumbing pipes are larger and less flexible than wire. If the electrician lands first, someone moves boxes to clear a drain. That is a change order, not a personality clash.

The general contractor owns the calendar, the dumpster, and the other trades. The plumber owns the test, the stub locations, and the C-36 work. We connect you with independent licensed plumbers. They are not our employees, and they are not automatically the builder’s employees. You still contract with that plumber directly. Ask, in writing, whether the remodel bid already includes the plumbing contract or only a hole in the schedule.

Change the shower location after the valve is set and the tile is ordered, and you are buying the layout twice. Hold a short meeting before the first cut: fixture packet, slab or crawl, which walls open, when water shuts off, and who calls the inspector. Coastal jobs in Pacific Beach, La Jolla, and Imperial Beach add parking and HOA access. Inland jobs in Escondido and El Cajon add attic heat. Neither is a reason to skip that meeting.

We do not publish a plumbing-only remodel range on this page. Access, drain moves, fixture count, and patching all move the number. Get a written quote for this house.

When to call us

Call when a remodel is about to open walls and you need the supply and drain work scoped before finishes, when you cannot tell a slab drain move from a same-spot refresh, or when the builder’s calendar has no plumber attached. The licensed plumbers we send handle remodel rough-in and later fixture trim. See bathroom and kitchen plumbing and fixture installation. Call us at (858) 400-4417 and we’ll connect you with a licensed plumber.