Step 1: License and Registration Verification
Idaho's contractor licensing landscape is unique. The state does not require a general contractor license, which means anyone can call themselves a general contractor. This makes your vetting process even more important.
However, specialty trades are licensed by the Idaho Division of Building Safety (DBS). Electricians, plumbers, and HVAC contractors must hold valid state licenses. Verify these at the DBS website or by calling (208) 334-3950. Ask your general contractor for their subcontractors' license numbers and verify each one independently.
At the city level, many Idaho cities require a business license or registration. Check with your local city hall — Idaho Falls, Pocatello, and Rexburg all have business registration requirements.
Step 2: Insurance Verification
Insurance is non-negotiable. A contractor without proper insurance transfers all risk to you — the homeowner. If a worker is injured on your property or the work causes damage, you could be personally liable without contractor insurance.
Require two types of insurance: General liability insurance ($1 million minimum) covers property damage and third-party injuries. Workers' compensation insurance covers employee injuries on the job. Ask for certificates of insurance naming you as additionally insured, and call the insurance company directly to verify the policy is active and current.
Do not accept excuses like "I'm a one-man operation, I don't need workers' comp." If they have any employees or subcontractors, they need it. And even sole proprietors should carry general liability.
Step 3: References and Past Work
Ask for at least 3-5 references from basement projects completed in the last 2 years. Actually call these references — many homeowners skip this step and regret it later. Ask specific questions about timeline adherence, communication, cleanup, quality, and whether the final cost matched the quote.
Better yet, ask to visit a completed project in person. Seeing the quality of drywall finishing, trim work, and attention to detail tells you more than any phone call. Look at corners, transitions between materials, and how the contractor handled difficult spots like soffits around ductwork and window wells.
Check online reviews on Google, Facebook, and the Better Business Bureau. Look for patterns — one bad review can be an outlier, but multiple complaints about the same issue (delays, change orders, poor communication) is a pattern. For complete project planning, start with our before you start guide.
Step 4: Written Estimates and Contracts
Get at least three detailed written estimates and compare them carefully. A proper estimate should itemize materials, labor, and any allowances separately. Vague one-line quotes like "Finish basement — $35,000" are red flags.
Make sure each contractor is quoting the same scope. Create a written scope of work document that you give to each contractor. Include the number of rooms, bathroom specifications, flooring type, lighting count, and any specific features you want. This ensures apples-to-apples comparison.
The contract should spell out everything: materials and brands, payment schedule tied to milestones, start and completion dates, change order process, warranty terms, who pulls permits, and cleanup expectations. Never start work without a signed contract. For cost expectations, see our cost guide.
Red Flags to Watch For
Large upfront payment demand
More than 30% deposit before work begins. Legitimate contractors have credit with suppliers and do not need your money upfront to buy materials.
No written contract
Verbal agreements are unenforceable and leave you unprotected. If they will not put it in writing, walk away.
Pressure to skip permits
"We do not need a permit for this" is almost always wrong and always a red flag. See our building codes guide for permit requirements.
Extremely low bid
If one bid is 20%+ below the others, they are either cutting corners, planning change orders, or underqualified. The cheapest contractor rarely delivers the best value.
No insurance or refuses to show proof
This transfers all liability to you. No exceptions — verify insurance before signing anything.
Cash-only payment
Legitimate businesses accept checks and credit cards. Cash-only operations often avoid taxes and accountability.
Contractor FAQ
Does Idaho require contractor licensing?
Idaho does not have a statewide general contractor license requirement. However, electrical, plumbing, and HVAC contractors must be licensed by the state. Some cities (like Idaho Falls and Pocatello) require business registration. Always verify that specialty subcontractors (electricians, plumbers) hold valid Idaho licenses through the Idaho Division of Building Safety.
How many quotes should I get?
Get at least three written quotes from different contractors. This gives you a range to compare and helps identify outliers — both suspiciously low bids (which often lead to change orders and corners cut) and inflated bids. Make sure each contractor is quoting the same scope of work so the comparison is meaningful.
What should a basement finishing contract include?
A proper contract should include a detailed scope of work, material specifications (brands, models, colors), total price with payment schedule, start and estimated completion dates, change order process, warranty terms, permit responsibility, and insurance certificates. Never sign a contract that is vague on scope or materials — that is where disputes happen.
How much deposit should I pay?
A reasonable deposit is 10-20% of the total project cost, or enough to cover initial material purchases. Never pay more than 30% upfront. Payments should be tied to milestones (framing complete, rough-ins inspected, drywall complete, final walkthrough). Never pay the final 10-15% until the project is fully complete and you are satisfied.
What are red flags when hiring a contractor?
Major red flags include: demands for large upfront payments (over 30%), no written contract or vague contract, no insurance certificates, pressure to skip permits, no references or unwillingness to share them, extremely low bid compared to others (20%+ below average), cannot provide a business address, and asking to be paid in cash only.
Related Guides
Need outdoor contractors too? Visit Idaho Sprinkler Systems and Idaho Yard Pros for vetted outdoor improvement contractors.