Bathroom demolition is a sequence problem. Do it in the wrong order and you are carrying a cast-iron tub through a room full of debris, or cutting drywall with live wires in the wall. This guide gives the shutoff-to-cleanup order that keeps the job safe, fast, and salvage-friendly.
A bathroom packs more systems into less space than any other room: water, drain, vent, electrical, and tile over everything. Demolition goes smoothly when each system is dealt with in order — shutoffs first, fixtures out, surfaces off, then the rough structure. Chaos comes from skipping the order.
This guide assumes a standard full-bath gut down to the studs. Work top to bottom, keep the debris path clear, and pull salvage as you go instead of digging it out of the pile later.
Before demolition in any home built before 1978, test for lead paint and asbestos — tile, mastic, insulation, and joint compound from that era can contain them, and abatement is licensed work. This guide does not cover structural changes: if a wall might be load-bearing, stop and get a pro or an engineer.
Demolition itself is governed more by local permit rules than by model codes, but the rebuild must meet current code — and anything you touch electrically must stay code-compliant (NEC 300.15: splices only in accessible boxes). Pre-1978 homes: federal EPA RRP rules apply to lead paint disturbance. Check local amendments for permit requirements on bathroom guts.
Shut the water at the main or the bathroom branch valves, then open the faucets and flush the toilet to drain the lines. At the panel, switch off the bathroom circuits — lights, receptacles, and the exhaust fan — and verify dead with a non-contact tester at every device. Never trust a label; test the actual wires. A bathroom with live circuits and water on the floor is the exact scenario that injures people.
Shut the toilet's supply valve, flush to empty the tank, sponge out the remainder, and disconnect the supply line. Unbolt the flange nuts, rock the bowl gently to break the wax seal, and lift it straight off — toilets are heavier and more awkward than they look. Plug the drain with a rag immediately to block sewer gas, and set the toilet aside intact if it is being reused or donated.
Disconnect the supply lines and the P-trap under the sink — keep a bucket handy, traps hold water and worse. Cut the caulk line with a utility knife, unbolt the vanity from the wall, and lift it out. Remove the mirror, medicine cabinet, towel bars, and light fixtures, capping any exposed wire with wire nuts and tucking it into the box. Fixtures removed whole are donatable; fixtures smashed are trash.
Start tile removal at an edge or a damaged spot: drive a flat bar or cold chisel behind the tile and pop sections off the backer board. Floor tile comes up faster with a long-handled floor scraper or a rotary hammer with a chisel bit. Expect this to be the messiest, slowest phase — tile and mortar generate enormous debris weight. Bag as you go so the room stays workable.
Disconnect the drain and the overflow, then cut the caulk and any fasteners holding the tub flange to the studs. A cast-iron tub can weigh 300-plus pounds — plan the carry path, get help, and protect the floors on the way out. Fiberglass and acrylic units can be cut into sections with a reciprocating saw for one-person removal. Cap the drain and the supply stubs the moment the tub is out.
With fixtures and tile gone, cut the drywall or plaster into manageable sections and pull it off the studs, watching for wiring and plumbing as each section comes free. This is where the salvage happens: copper supply lines, brass shutoff valves, and Romex runs are all exposed now. Cut pipe into straight lengths, coil the wire, and get both into the salvage bins before the wall debris buries them.
Do not wait until the end. As each wall opens, pull the copper pipe, brass valves and fittings, and electrical wire immediately and sort them into bins. Pipe pulled clean and straight is worth more effort than pipe fished out of a debris pile, and wire with the insulation intact is easier to handle. Keep ferrous and nonferrous separate — mixed piles get mixed prices.
Bag the last debris, sweep the subfloor, and inspect what is left: studs should be clean, pipes capped, wires safely terminated in boxes, drains plugged. A broom-clean, clearly documented shell is what the plumber, electrician, and tile setter expect to walk into — and it is what separates a professional demo from a mess someone else has to fix.
Every one of these has cost someone a callback. Learn them here instead of on the job.
Shutting the breaker and assuming the circuit is dead. Test every device with a tester — mislabeled panels are the rule, not the exception.
One cracked supply stub with the main still open floods the floor below in minutes. Shut it, drain it, verify it.
A working toilet or vanity has donation or resale value. Ten seconds with a wrench beats a sledgehammer when the fixture is still good.
Tile dust travels through the whole house without containment. Plastic the doorways, exhaust a fan, wear the respirator.
Open supply stubs and drains left overnight invite leaks, sewer gas, and debris in the lines. Cap everything the same day.
A single bathroom demo yields 30 to 60 pounds of copper and brass before the dumpster fills: supply lines, stub-outs, brass shutoff valves, the P-trap and tailpieces, plus the Romex pulled from the walls. It comes out in the natural course of the work — the only question is whether it goes in a salvage bin or the debris pile.
Set the bins out before the first swing and pull the metal as you expose it. Most crews split the salvage at the end of the job. When the bins are full, call Sonny at 312-880-8174 — one call and the demo pays a little extra.
No minimums — every bucket counts. On bigger lots, we handle the freight so you don't lift a finger.
Work to code. Hire a licensed pro where required. This guide explains how the work is done — it does not replace training, apprenticeship, or a license.