A bathroom construction company builds or rebuilds bathrooms from the structure outward: demolition, framing, plumbing and electrical rough-in, waterproofing, tile, cabinetry, fixtures and the permits and inspections that tie it together. That differs from a tile installer or a handyman, who typically handles one slice of the job. In Florida, where humidity and water intrusion are constant threats, the parts you never see after the walls close matter at least as much as the finishes you pick.
A lot of what homeowners believe about bathroom work comes from quick makeover videos. Some of it holds up, and some of it leads to failed showers and mold a few years later. Below we sort fact from fiction, then explain what a full-service builder should take responsibility for.
What a Bathroom Construction Company Should Handle
When you hire a general contractor for a bathroom, you are paying for coordination as much as for labor. A complete scope normally includes:
- Protection of floors and adjacent rooms, then demolition and debris removal.
- Inspection of subfloor, framing and drain lines once the room is opened, with documented repairs where needed.
- Plumbing rough-in for supply and drain lines, valves and any relocated fixtures.
- Electrical rough-in for GFCI protected outlets, lighting, an exhaust fan and possibly heated floors.
- Wall blocking for grab bars, vanities, niches and wall-hung toilets.
- Substrate and waterproofing for the shower walls, shower floor and often the full bathroom floor.
- Tile, vanity, countertop, glass, fixtures, trim and paint.
- Permits, inspections and a final walkthrough with you.
If a proposal lists only the visible finishes, the invisible steps are either missing or buried. Ask for them to be itemized.
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Myth: Tile and Grout Keep the Water Out
Tile is a decorative surface, and cement grout is porous. Water passes through grout lines every time you shower. What actually keeps the wall cavity and floor dry is the layer behind the tile: a sheet or liquid applied waterproof membrane over cement board or a foam board system, carried continuously into the shower pan with sealed seams, corners and pipe penetrations.
The shower floor needs its own attention. A properly built pan slopes to the drain so water cannot pool, and the membrane ties into the drain assembly. Before tile goes down, a careful builder plugs the drain and performs a flood test, filling the pan and checking that the level holds over a set period. Skipping that step saves a little time and risks a very expensive repair.
Myth: A Window Is Enough Ventilation
An operable window can satisfy minimum code in some cases, but almost nobody opens a bathroom window after every shower, especially during a humid Florida summer when outside air is already saturated. A properly sized exhaust fan, ducted all the way to the exterior and controlled by a timer or humidity sensor, removes moisture before it condenses on walls and ceilings. A fan that vents into the attic only moves the problem upstairs. Our article on preventing mold in Florida bathrooms covers this in more detail.
Myth: Swapping a Tub for a Shower Is a Weekend Job
Removing a tub and installing a walk-in shower is one of the most requested bathroom projects, and one of the most underestimated. A shower drain may need to be relocated or resized, the floor must be built up or recessed for proper slope, the wall plumbing usually changes for a new valve and showerhead height, and the entire wet area needs waterproofing. Those changes generally require a permit and inspection.
Done right, the conversion is a significant upgrade, particularly for owners who want easier entry. Our tub to shower conversion guide walks through options from curbed showers to low threshold designs.
Myth: Bigger Tile Always Looks Better
Large format tile can make walls look seamless and floors look expansive, but it has limits. On a shower floor, the surface has to slope toward the drain, and large rigid tiles cannot follow that slope without lippage or cutting. Smaller mosaics, or a linear drain that allows a single plane slope, solve the problem. Large tiles also demand a very flat substrate, so the wall or floor may need extra preparation.
Slip resistance matters too. Floor tile in a wet area should have an appropriate rating, and mosaics with more grout lines naturally provide more grip underfoot.
Myth: Safety Features Look Institutional
Grab bars, a bench, a handheld shower and a low threshold entry can be designed to look like intentional style choices. Modern grab bars come in finishes that match faucets, and some double as towel bars. The key is planning: solid blocking installed in the walls during framing means a bar can be mounted securely now or added years later without opening finished tile. Even if nobody in the household needs these features today, the blocking costs very little to add during construction. See our page on aging in place bathroom design for ideas.
Myth: Every Bid Includes the Same Work
Two proposals for the same bathroom can differ widely, and the gap rarely comes from profit margin alone. One bid may include a full floor membrane, a new mixing valve, a ducted fan and backer board throughout, while another assumes the existing valve stays, tiles over old drywall outside the shower and leaves ventilation as is. Allowances for tile, vanity and fixtures can also be set low to make a total look attractive.
Lay the proposals side by side and match line items. Where one bid is silent on something the other includes, ask directly whether it is covered. A builder confident in its scope will explain the difference without getting defensive, and that conversation usually reveals which number is realistic.
Ask any builder to describe, step by step, how they waterproof a shower and when they flood test it. The answer tells you more than a gallery of finished photos.
Questions That Separate Builders From Installers
- Is your Florida license active, and can I verify it on the DBPR site?
- Who pulls the permit, and which inspections will the job require?
- What waterproofing system do you use, and do you follow the manufacturer's installation requirements so the warranty applies?
- How do you handle rot or leaks discovered after demolition?
- What does your workmanship warranty cover, and for how long?
Assured Supreme Contracting is a licensed and insured Florida contractor that pulls permits, provides an itemized written quote and manages your bathroom with one accountable team, backed by a workmanship warranty. Schedule a free in-home consultation to talk through your plans.
A bathroom construction company earns its fee in the layers behind the tile and the coordination between trades, so judge each candidate on how they build, not only on how the finished room looks in photos.
Frequently Asked Questions
After the shower pan and membrane are installed but before tile, the installer plugs the drain and fills the pan with water to a set depth. The level is marked and checked after a waiting period. If it drops, there is a leak to fix. Some jurisdictions require this test as part of inspection.
No. Cement board is water resistant, meaning it will not break down when wet, but water can pass through it. It needs a waterproof membrane, either a sheet product or a liquid applied coating, to keep moisture out of the wall cavity. Some foam board systems are waterproof when seams are properly sealed.
Plumbing codes and tile industry standards call for a consistent slope toward the drain, commonly around a quarter inch per foot. The goal is that water never pools anywhere on the floor. Linear drains allow the floor to slope in one direction, which suits larger tiles and curbless designs.
Often yes, but it usually requires recessing the slab in the shower area so the floor can slope without a step up. That means cutting and removing concrete, adjusting the drain and pouring or building a new sloped base. It takes more work than a curbed shower, so plan for that in budget and schedule.
Fan capacity is typically sized by the room's floor area and ceiling height, with extra capacity for enclosed showers or jetted tubs. Ductwork length and bends reduce actual airflow, so the run matters. Your contractor should select a fan rated for the room and duct it directly to the exterior.
It is not always required outside the shower, but in Florida it is a smart upgrade, especially with curbless showers, second floor bathrooms or rooms above finished space. A membrane under the floor tile protects the subfloor from overflow, splashes and slow leaks around the toilet.
Common causes include movement in the subfloor or framing, missing movement joints at changes of plane, and improper mixing or curing. Corners where walls meet the floor or each other should get flexible sealant instead of grout. Persistent cracking can signal a deflecting floor that needs structural attention.
A like-for-like swap in the same location may not require a permit in many jurisdictions, but rules vary. Moving fixtures, adding circuits, altering walls or rebuilding a shower generally does. A licensed contractor confirms requirements with the local building department before starting so the work stays documented.
Blocking is solid lumber installed between wall studs during framing to provide a strong anchor point. It allows grab bars, wall-hung vanities, heavy mirrors, shower doors and shelving to be fastened securely. Adding it before drywall or tile is inexpensive; retrofitting it later usually means opening finished walls.
A shower built with a continuous membrane, proper slope and a sound substrate can last for decades with routine care. Fixtures and grout may need attention over time, but the structure behind the tile should not. Showers that fail early usually have waterproofing or slope problems hidden under the surface.
Yes. Builders isolate the bathroom with dust barriers, protect hallways and limit water shutoffs to short scheduled windows. If the home has only one bathroom, plan for temporary arrangements during the days when the toilet is removed, or ask whether the toilet can be reset temporarily overnight.
Porcelain tile, quartz or solid surface counters, and vanities built from plywood or moisture resistant materials with sealed finishes perform well. Use mold resistant drywall outside wet areas and a paint designed for bathrooms. Most important is moving moist air out with a properly ducted fan so surfaces dry between uses.