Summary
22 items · 20–40 minutes
Why the Right Questions Matter Before Work Begins
Hiring a contractor is one of the bigger financial decisions a homeowner makes. Whether you're renovating a bathroom, replacing a roof, or adding a deck, the contractor you choose — and the terms you agree to — will shape the outcome far more than the materials themselves. Yet many homeowners skip the vetting stage entirely and simply accept the first bid that arrives.
That's a costly habit. Disputes over payment, scope, and timeline consistently rank among the most common homeowner complaints. The good news is that most problems are preventable with a structured approach before any paperwork is signed. If you're still deciding whether to tackle a project yourself or bring in a pro, our guide to choosing between DIY and hiring a professional can help you make that call first.
This checklist walks you through the essential questions to ask every contractor candidate — covering credentials, bids, contracts, permits, and communication — so you can make a confident, informed decision. Use it as a conversation guide during interviews and a reference once work is underway.
State Contractor Licensing Board
Verify a contractor's active license status and check for disciplinary actions online before your first meeting.
Certificates of Insurance
Request these directly from the contractor's insurer to confirm general liability and workers' comp coverage are current.
Written Bid Template
Use a standard template or blank spreadsheet to compare multiple bids line by line across labor, materials, and allowances.
Contract Addendum Form
A simple dated, signed form for documenting any change to project scope, timeline, or cost after the contract is signed.
Local Building Department Contact
Confirm which permits your project requires and whether the contractor has applied for them on your behalf.
Credentials and Reputation
Before discussing a single project detail, confirm the contractor meets baseline professional standards. These questions are non-negotiable.
Credentials and Reputation
Bids and Scope of Work
Payment Structure
Permits, Timeline, and Communication
Bids, Contracts, and Payment
Once you've narrowed your list to credible candidates, the next stage is understanding exactly what you're agreeing to pay for. When reviewing written estimates, our guide to reading a contractor's bid walks you through every line item to watch for.
Never Skip the Written Contract
A verbal agreement has almost no legal protection if a dispute arises. Every project, regardless of size, should be governed by a signed written contract that includes the full scope of work, materials specified, payment schedule, start and completion dates, and how disputes will be resolved. Review it carefully — and consider having an attorney look it over for large or complex projects — before signing.
Payment structure is one of the clearest indicators of a contractor's professionalism. A reasonable down payment — often 10–30% depending on project size and local norms — is standard. Demands for more than half upfront before any work begins are a recognized warning sign. Tie each payment milestone to a verifiable project milestone, and document every transaction.
Permits, Timelines, and Communication
Permits protect you, not just the contractor. Work done without required permits can create serious problems when you sell your home or file an insurance claim. Unfamiliar with terms like "rough-in inspection" or "certificate of occupancy"? Our glossary of home improvement terms covers the vocabulary you'll encounter on any significant project.
Unpermitted Work Can Cost You Later
If a contractor suggests skipping permits to save time or money, treat that as a serious red flag. Unpermitted work may have to be torn out and redone at your expense to satisfy a home inspector during a future sale. Some homeowner's insurance policies also restrict or deny claims for damage related to work done without required permits. Always verify permit requirements with your local building department directly.
Clear communication expectations prevent the majority of mid-project disputes. Agree in advance on how often you'll receive updates, who the day-to-day point of contact is, and how change orders — any modification to the original scope — will be documented and priced. Every change, no matter how minor, should be added to the contract in writing before work continues. For broader project budgeting context, the Budgeting Basics hub offers practical strategies for planning home improvement spending alongside your other financial priorities.
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