Hiring a contractor is one of the biggest financial decisions most homeowners ever make. Get it right and you gain a home that works better, looks better, and holds its value. Get it wrong and you're looking at months of delays, cost overruns, substandard work — and sometimes a legal dispute to close it out.
The western suburbs of Chicago have no shortage of contractors. DuPage and Will County directories list hundreds of them. But "licensed and insured" is the floor, not the ceiling. Here are the ten questions that separate contractors worth hiring from the ones who'll cost you more than you saved.
1. Are You Licensed to Work in Illinois — and the Right License for This Scope?
Illinois doesn't have a single statewide general contractor license the way some states do. What it has is a layered system: state-level licenses for specific trades (plumbing, electrical, HVAC), and municipal registration requirements that vary by city. A contractor working in Naperville needs to be registered with the City of Naperville. Work in Lisle, Wheaton, or Downers Grove has its own requirements.
Ask specifically: "Are you registered to pull permits in [your city]?" A contractor who hesitates, redirects, or tells you permits aren't necessary for your project is a red flag. Permits exist because inspections protect you — they're the independent check that the work was done correctly.
For electrical and plumbing subcontractors — and they should be licensed subs, not unlicensed guys your GC knows — verify license numbers directly with the Illinois Department of Financial and Professional Regulation (IDFPR). The lookup is free at idfpr.illinois.gov.
2. Can You Provide Proof of General Liability Insurance and Workers' Compensation?
This is non-negotiable, and you need to see the actual certificate — not just hear "yes, we're insured." Ask for a Certificate of Insurance (COI) naming you or your property as an additional insured. Call the insurance company to verify it's current. General liability covers damage to your property. Workers' comp covers injuries to workers on your site — without it, an injured worker can potentially file a claim against your homeowner's insurance.
Minimum coverage levels worth requiring: $1 million per occurrence general liability, $2 million aggregate. Any reputable contractor will have this. Anyone who balks at providing proof should be dismissed immediately.
3. Who Actually Does the Work — Your Crew or Subcontractors?
This matters more than most homeowners realize. A GC who self-performs work with their own in-house crew has direct control over quality, scheduling, and accountability. A GC who subs everything out is essentially a project manager — which isn't inherently bad, but changes the dynamic significantly.
When work is heavily subcontracted, quality consistency becomes harder to maintain. If a sub does poor work, the GC may have limited leverage to force a correction, especially once that sub has moved on to their next job. Ask: "Which trades do your in-house crew handle, and which do you subcontract?" A good contractor will answer this directly and explain why they've structured it that way.
At SilverBullet, we self-perform most of our work with our own crew. We do bring in licensed subs for specialized electrical and plumbing — but they're people we've worked with repeatedly and whose work we stand behind.
4. Can I See References From Projects Similar to Mine — and Can I Call Them?
Every contractor has a portfolio. What you want are references — actual homeowners who went through what you're about to go through — who you can call and ask real questions. Not just "were you happy?" but: Did they show up when they said they would? Did the final cost match the estimate? Were there surprises, and how did they handle them? Would you hire them again for a larger project?
Ask for references from projects of similar scope and scope complexity. A contractor who's excellent at bathroom remodels may not be the right fit for a room addition with structural work. Relevant experience matters. Three to five references, at least two callable, should be easy for any contractor with a track record.
5. How Do You Handle the Permit Process?
In DuPage and Will County, any structural work, electrical work beyond device replacements, plumbing changes, or HVAC modifications requires a permit. Kitchen remodels involving new circuits? Permit. Basement finishing with egress windows and electrical? Permit. Bathroom relocating plumbing? Permit.
A contractor who suggests skipping permits is either trying to move faster or protect their margins — and passing the legal and financial risk onto you. When you sell your home, unpermitted work that shows up on an inspection can require you to pull retroactive permits, open walls for inspection, or credit the buyer for the value of unknown risk. We've seen homeowners in Naperville, Geneva, and Plainfield face $15,000–$30,000 in retroactive costs because a previous contractor worked without permits.
The question to ask is: "Will you pull all required permits, and are permit fees included in the estimate?" A yes to both is what you want.
6. What Does Your Estimate Actually Include — and What Doesn't It?
Two estimates that look similar on paper can mean very different final costs depending on what's excluded. Ask the contractor to walk you through their estimate line by line. Specifically:
- Are material allowances realistic, or are they placeholders that will balloon when you make selections?
- Does the estimate include demo and haul-away, or is that extra?
- What happens if they open a wall and find something unexpected — knob-and-tube wiring, mold, structural issues? What's the process for change orders?
- Are permits included, or billed separately?
- What's the payment schedule, and what are the conditions for each draw?
Lowball estimates often exclude enough that the final number ends up higher than a more honest competitor's estimate. The goal isn't the lowest number on the first page — it's the most accurate number before you commit.
7. What's Your Timeline, and How Many Active Projects Will You Be Running During Mine?
Timeline slippage is the most common complaint against contractors in the western suburbs. Projects that should take eight weeks stretch to twenty. The crew that was on-site every day disappears for two weeks. The reason is almost always the same: the contractor took on more work than their crew can handle and is spreading labor thin across multiple jobs.
Ask directly how many projects they'll be running simultaneously during your project. Ask what the typical crew size on-site looks like during active phases. Ask for a written schedule with milestone dates. A contractor who can't give you a milestone schedule before breaking ground isn't organized enough to hit one.
Also ask what happens if the project runs over: is there any mechanism for accountability, or is timeline slippage just accepted as normal?
8. Do You Offer a Written Warranty — and What Does It Cover?
Illinois law gives you some protection regardless: contractors are generally liable for defects in workmanship, and new construction carries implied warranties under state law. But "some legal protection" and "an easy path to resolution" are different things.
A contractor confident in their work should offer a written warranty on workmanship — typically one to two years minimum on labor, longer on specific elements. Ask what the warranty covers, what the process is if something needs to be fixed post-completion, and how long warranty calls typically take to get addressed.
Also ask about manufacturer warranties on materials: cabinets, windows, fixtures. Know the difference between what the contractor backs and what the manufacturer backs, and who facilitates warranty claims.
9. How Do You Communicate During a Project?
Communication breakdowns cause more project misery than almost anything else. The homeowner doesn't know what's happening on-site. The contractor is hard to reach when questions come up. Decisions get made without input. Things get built that need to be rebuilt.
Ask specifically: Who is my point of contact throughout the project? How often will I get updates? What's the best way to reach someone if I have a question or concern? How are change orders documented and approved?
The answer you want: a single dedicated contact, regular written updates, and a documented change order process. The answer that should concern you: "you can always call me" from a contractor who's juggling twelve jobs.
10. Can You Provide a Written Contract That Covers Scope, Schedule, and Payment Terms?
This is the capstone. Everything you've discussed — scope of work, inclusions and exclusions, timeline, payment schedule, warranty, change order process — should be in writing. Not a one-page estimate. A contract.
Key elements a proper contract should include:
- Detailed scope of work (what's included, what's not)
- Material specifications (brand, model, grade where relevant)
- Start date and milestone schedule
- Payment schedule tied to milestones, not arbitrary dates
- Change order process and pricing
- Warranty terms
- Dispute resolution process
- Certificate of substantial completion
Never pay more than 10–15% upfront before work begins — Illinois law caps deposits at 1/3 of the contract price for most residential projects. Final payment should be held until you've walked the project, documented any punch list items, and confirmed they've been addressed. Don't release final payment on a promise.
One More Thing: Trust Your Read on Them
The ten questions above are filters. They help you eliminate the contractors who can't answer them. But among those who can, you're hiring someone whose crew will be in your home, sometimes for weeks or months. How they talk to you — whether they listen, whether they explain things clearly, whether they seem genuinely interested in doing good work versus just closing a sale — matters.
The best contractors we've encountered in this industry take pride in their work independent of whether you're watching. They'll point out something they don't like before you notice it, because it bothers them. That disposition is hard to manufacture, and it's what separates a completed project from a finished one.
Frequently Asked Questions
How do I verify a contractor's license in Illinois?
For trade-specific licenses (plumbing, electrical, HVAC), use the IDFPR license lookup at idfpr.illinois.gov. For municipal registration, contact your city's building department directly — Naperville, Lisle, Wheaton, Downers Grove, and most DuPage/Will County municipalities maintain contractor registration lists.
What's a reasonable deposit for a home remodeling project in Illinois?
Illinois law limits deposits to one-third of the contract price for residential remodeling projects. For most projects, a 10–15% mobilization deposit is reasonable. Be wary of contractors asking for 50% or more upfront — it's often a sign of cash flow problems or a fly-by-night operation.
Do I need permits for a kitchen or bathroom remodel in DuPage County?
Almost certainly yes for any meaningful work. Structural changes, new or relocated electrical circuits, plumbing changes, and HVAC modifications all require permits in DuPage and Will County municipalities. Even some cosmetic work like replacing windows requires a permit in many cities. Ask your contractor — and if they say you don't need one for work that clearly should be permitted, that's a problem.
What should I do if a contractor asks me to pay in cash to "avoid taxes"?
Walk away. This arrangement protects the contractor, not you. You lose paper trail, you lose lien protection, and if the work is defective or unfinished, you have limited recourse. Cash payments also suggest the contractor isn't running a properly structured business — which raises questions about insurance, licensing, and worker classification.
How many contractors should I get bids from?
Three is the standard recommendation, and it's good advice. Fewer and you don't have enough reference points to evaluate pricing. More and the process becomes unwieldy for everyone. Make sure you're comparing apples to apples — a detailed scope of work given to all three bidders produces more useful comparisons than letting each contractor scope the project their own way.