Hiring a contractor in Southern California is one of the most consequential decisions a homeowner can make. With hundreds of projects happening across the region every day, the market is competitive — but that competition works in your favor if you know how to use it. This guide walks you through every step, from finding qualified candidates to signing a contract you can trust.
Step 1: Start with CSLB Verification
California requires all general contractors and most specialty contractors to be licensed by the California State License Board (CSLB). This is not optional — it's the law. A valid license means the contractor has passed a trade exam, carries a surety bond, and is legally accountable for their work.
Before you get on the phone with anyone, look them up at cslb.ca.gov. Enter their license number and confirm: the status says "Active," the license classification matches your project type (B for general, C-10 for electrical, C-36 for plumbing), and the bond and workers' compensation are current.
Step 2: Get at Least Three Bids
Getting three bids isn't just about price — it's about understanding your project. Each contractor will approach the job differently, and comparing proposals reveals what's included, what's excluded, and which contractor has thought the job through most carefully.
When requesting bids, give every contractor the same written description of the project. This ensures you're comparing equivalent proposals. If the scope changes during the bid process, notify all bidders so the comparisons stay valid.
Step 3: Read Each Proposal Carefully
A professional bid is a written document, not a verbal estimate. Look for each of the following before making any decisions:
- Itemized costs breaking out labor and materials separately
- A clear project start date and estimated completion date
- A milestone-based payment schedule (never pay ahead of completed work)
- A list of what is explicitly excluded from the scope
- The contractor's CSLB license number and insurance information
If a bid is just a number on a piece of paper — or worse, verbal — ask for a written breakdown before proceeding.
Step 4: Check References
Ask each contractor for two or three recent references, specifically for projects similar to yours in scale and type. Then actually call them. Ask whether the project finished on time, whether the final cost was close to the original bid, and whether they'd hire the contractor again. A contractor who has done excellent work will have no hesitation providing references.
Step 5: Understand the Contract Before You Sign
California law requires a written contract for any home improvement project over $500. The contract must include a project description, start and completion dates, the total price, a payment schedule, and a notice of your right to cancel within 3 business days.
California also caps down payments at 10% of the total price or $1,000 — whichever is less. If a contractor asks for 30%, 40%, or 50% upfront before starting any work, that's a violation of state law and a serious red flag.
Red Flags That Deserve Immediate Caution
- No physical address, or only a P.O. box
- Requests for large upfront payment before any work begins
- Unable or unwilling to provide a license number
- Suggests skipping permits to "save time" or "save money"
- Wants to start immediately without a written contract
- Bid is dramatically lower than all other proposals (missing scope, unlicensed labor, or a setup for cost escalation)
A Word on Permits
Most structural, electrical, plumbing, and HVAC work in Southern California requires a permit. Your contractor — not you — should pull permits. Unpermitted work can affect your home's resale value, void insurance claims, and create liability if something goes wrong. A contractor who suggests skipping permits is shifting risk onto you.