Choosing the wrong bathroom remodeling contractor is one of the most expensive mistakes a homeowner can make. A bad hire can mean substandard work that fails within a few years, a contractor who disappears mid-project, hidden costs that blow your budget, or work done without permits that creates problems at resale. Protecting yourself doesn’t require insider knowledge — it requires asking the right questions and knowing what the answers should look like.
This guide covers exactly what El Monte homeowners should verify, ask, and watch for before signing a contract with any bathroom remodeling contractor.
Step 1: Verify the CSLB License
In California, any contractor performing work valued at more than $500 must hold a valid license from the Contractors State License Board (CSLB). Bathroom remodeling typically falls under a B-General Building contractor license or a C-20 (warm-air heating) or C-36 (plumbing) specialty license for specific trades.
Verify any contractor’s license status at cslb.ca.gov. Enter the license number the contractor provides and confirm:
- The license is current and active (not expired or suspended)
- The name on the license matches the company you’re hiring
- The license classification covers the work being done
- There are no disciplinary actions or complaints on file
This takes two minutes. Never skip it.
Step 2: Confirm Insurance
Ask for proof of two types of insurance: general liability and workers’ compensation. General liability covers property damage if the contractor damages your home during the project. Workers’ comp covers injuries to the contractor’s employees on your property. Without workers’ comp, an injured worker could pursue a claim against your homeowner’s insurance — or sue you directly.
Ask the contractor to have their insurance provider send you a certificate of insurance (COI) directly. Don’t accept a photocopy of a document the contractor hands you — it’s easy to produce a fake. A legitimate contractor will have no problem providing this.
Step 3: Ask for References from Recent Projects
Ask for two or three references from bathroom remodeling projects completed in the last 12 months. Then actually call them. Ask:
- Did the project finish on time and on budget?
- Were there any surprises, and how did the contractor handle them?
- How was communication during the project?
- Would you hire them again?
A contractor who can’t produce recent references is a red flag. A contractor whose references can’t remember working with them (because they were never contacted before being listed) is a bigger one.
How to Read a Bid
A legitimate contractor bid should be itemized — breaking out labor, materials, and specific line items for each phase of work. A single-line bid (“bathroom remodel: $12,000”) tells you nothing and gives you no protection if something is skipped. Itemized bids let you compare apples to apples and identify exactly what’s in scope and what isn’t.
Step 4: Get at Least Three Written Bids
Three bids give you a meaningful range to evaluate. The goal isn’t to find the lowest price — it’s to understand the market rate and identify outliers in either direction. A bid significantly below the others usually means something is being left out or cut short. A bid significantly above may reflect premium materials or overhead, but ask for clarification either way.
Make sure all three contractors are bidding on the same scope of work. If one bid excludes permits or waterproofing while others include them, the comparison isn’t meaningful.
Questions to Ask Before Hiring
- Who will actually be doing the work? Some contractors sub out everything. Know who is on your jobsite.
- Will you pull the required permits? The answer should always be yes for any project involving plumbing or electrical work in El Monte.
- What is your waterproofing system for the shower? A specific answer shows knowledge. A vague answer is a warning sign.
- What is your payment schedule? Legitimate contractors don’t ask for more than 10% down (California law limits deposits to $1,000 or 10% of the contract, whichever is less for unlicensed contractors). Never pay more than 10% upfront.
- What happens if hidden conditions are discovered? How do they communicate and handle scope changes mid-project?
- Do you offer a workmanship warranty? What does it cover and for how long?
Red Flags to Watch For
- Unable or unwilling to provide proof of license and insurance
- Asks for large upfront payment (more than 10% or $1,000)
- Only takes cash, no written contract
- Pressures you to sign the same day or claims pricing is only valid for 24 hours
- Vague on the scope of work — won’t provide an itemized bid
- Can’t explain their waterproofing approach
- No physical address or business history you can verify
- Proposes to skip permits to “save you money”
What a Good Bathroom Remodeling Contract Includes
Before signing anything, your contract should include: a detailed description of all work to be performed, a material list with specific products or allowances, the total price and payment schedule, a project start date and estimated completion date, a change order process (how changes are priced and approved), warranty terms, and what happens if either party wants to cancel.
If a contractor resists putting things in writing, walk away. A professional contractor should welcome a detailed contract because it protects both parties.
Full Quality Bathroom Remodeling is fully licensed and insured in California and serves El Monte and the San Gabriel Valley. Call 626-542-1706 to schedule your free in-home estimate.