A deck is one of the best investments you can make in your Cary home, but the difference between a deck that lasts 20 years and one that starts sagging in five comes down to who builds it and how you vet them. I have sat through hundreds of homeowner consultations in McHenry County, and the single biggest regret people share is not asking the right questions before they signed a contract. They trusted the lowest bid, skipped the license check, or assumed the builder would handle the permit. By the time they realized their mistake, they were out thousands and stuck with a structure that needed repairs within two years. Here are the five questions every Cary homeowner needs to ask before hiring a deck builder, along with the answers that separate a pro from a problem.
1. Are You Licensed, Insured, and Bonded for Cary, IL Projects?
This is not a box to check. It is a non negotiable safety net. A general liability policy that covers the builder is not enough. You need to verify that their insurance specifically covers residential construction in Cary and that the policy is current. Many homeowners assume that just because a contractor shows up with tools, they must be legitimate. But in Cary, a town with specific building codes and permit requirements, working with an unlicensed builder can leave you holding the bag if something goes wrong.
Ask for their license number and proof of insurance. Call their insurance provider to confirm the policy is active and covers the type of work they will be doing on your property. For Deck Building, which involves structural loads, footings, and often electrical work for lighting, you want to see a policy that covers property damage and bodily injury. Burns Carpentry is fully licensed and insured to work in Cary, and their credentials are current for all of McHenry County and the surrounding Illinois areas. They carry comprehensive liability insurance, so you are protected from the moment they start digging.
Bonding is another layer of protection. A bond means that if the builder fails to complete the project or does shoddy work, you have a financial recourse. Not every deck builder in the area is bonded, and that is a red flag. Ask directly: Are you bonded? If they hesitate or say they do not need it, move on to the next candidate. The cost of a bond is minimal compared to the risk of hiring someone who walks off the job.
2. Can You Provide a Detailed Written Estimate for My Deck Build?
A written estimate is your map. Without it, you have no way to compare bids, hold the builder accountable, or know what you are actually paying for. The estimate should break down every line item: materials (including the type of wood or composite, fasteners, railing systems, and stain or sealant), labor, permit fees, disposal costs, and any subcontractor expenses. If an estimate is a single number with no detail, that is your cue to walk away.
In the Cary market, a detailed estimate from a reputable deck builder like Burns Carpentry will also include the scope of work: how they will prep the ground, the depth of the footings (typically 42 inches below grade in Illinois to get below frost line), the type of fasteners (hidden or face mounted), and the railing style. They should also note whether the price includes staining or sealing for a wood deck. Many homeowners get halfway through a project only to discover that the stain is an extra $1,500. A good estimate eliminates those surprises.
When you receive the estimate, look for the fine print. Is there a clause about price increases if material costs go up? In 2026, lumber and composite prices can fluctuate, but a reputable builder will lock in the price for a reasonable period, usually 30 to 60 days, after the estimate is signed. Burns Carpentry provides free estimates for projects in the Cary area, and their process includes a site visit where one of their carpenters meets you at your property to discuss your vision, measure the space, and walk through every detail of the estimate before you commit.
3. What Is Your Timeline for Permits, Construction, and Completion?
Timeline is where many deck projects fall apart. A builder who says they can start next week but does not mention the permit process likely plans to skip it. In Cary, pulling a permit for a deck is standard, and the city inspects the footings, framing, and final structure. Skipping the permit means your deck is not insured, and if you ever sell your home, the buyer's inspection will flag it as unpermitted work, which can kill the sale.
A realistic timeline for a typical deck build in Cary is about three to five weeks from initial consultation to completion. That includes a week to two weeks for permit processing, one to two weeks for construction, and a few days for final inspection and finishing touches. Burns Carpentry manages the entire permit process with the Cary municipal offices, so you do not have to deal with paperwork. They know the local inspectors and the specific requirements for McHenry County, which means fewer delays and no surprise code violations.
Ask for a written schedule that shows each phase: site prep, footing excavation, concrete pour, framing, decking installation, railing, and final inspection. A professional builder will provide this. If they cannot give you a timeline, or they say things like we will get to it when we get to it, you are looking at a project that could stretch into months. The best builders also build in buffer time for weather, which in Illinois can shift from sunny to a thunderstorm in an hour. A good timeline accounts for that.
4. How Do You Handle Unexpected Issues Like Rot or Unlevel Ground?
No project goes perfectly. The ground under your deck may be uneven. The ledger board might reveal hidden rot in your homes siding. The soil might be too soft for standard footings. How a builder handles these surprises tells you everything about their professionalism. A good builder will have a clear process for assessing the site before they start and a plan for handling issues without blowing the budget.
Before any work begins, a thorough site assessment should identify potential problems. For example, if your yard slopes, the builder may need to use stepped footings or a retaining wall. If your homes siding is older, they should check for rot around the area where the ledger board attaches, because that is a common failure point. Burns Carpentry takes moisture control seriously in every project, and for deck builds, they inspect the existing structure for any signs of decay before they install the ledger board. If they find rot, they will tell you upfront and give you an estimate for the repair before proceeding.
Ask the builder: What happens if we dig and find tree roots or buried utility lines? What if the frost line is deeper than expected? A professional will have a standard answer, usually involving a contingency fund of 10% to 15% of the project cost set aside for unexpected work. They will also have a written change order process, so any extra work is documented and approved by you before they proceed. If a builder says they just handle it and figure it out later, that is a red flag. You want someone who plans for the unexpected, not someone who reacts to it.
5. Can You Share References and Photos of Similar Deck Projects in Cary?
References and photos are your window into the builders actual work. A portfolio of generic deck photos from the internet is worthless. You want to see projects they have completed in Cary or nearby towns like Arlington Heights, Palatine, or Schaumburg. Look for decks that are similar in size, style, and complexity to what you want. If you are planning a composite deck with a pergola and lighting, ask to see photos of exactly that combination.
When you call references, ask specific questions: Did the builder show up on time? Did they clean up every day? Were there any surprise costs? How did they handle the permit and inspection process? Would you hire them again? Most homeowners are happy to share their experience, and their answers will tell you more than any sales pitch. Burns Carpentry has a portfolio of deck projects across the Chicago suburbs, and they are happy to share references and photos of work they have done in Cary, including Wood Decks, Composite Decks, and pergola builds.
One insider tip: Ask for a reference from a project that was completed at least two years ago. That is enough time for the deck to go through a full Illinois winter and summer, and you can see how the materials have held up. Look for signs of warping, cracking, or fading. A good builder will stand behind their work, and Burns Carpentry guarantees their workmanship for two years from the date of completion, so they are confident their decks will last.
Frequently Asked Questions
Do I need a permit for a deck in Cary, Illinois?
Yes, Cary requires a permit for any deck that is attached to the house or exceeds a certain size, typically anything over 200 square feet or more than 30 inches above grade. The builder should handle the permit application and inspections. Burns Carpentry manages the entire permit process for you, so you do not have to deal with the village office.
How much does it cost to build a deck in Cary in 2026?
The cost varies widely based on size, materials, and complexity, but in 2026, a basic pressure treated wood deck in Cary runs roughly $30 to $45 per square foot, while a composite deck with premium railing and lighting can cost $50 to $75 per square foot. A 300 square foot deck might range from $9,000 on the low end to over $22,000 for a high end composite build. Always get a detailed written estimate from a local builder like Burns Carpentry for an accurate quote.
What is the best material for a deck in the Illinois climate?
Composite decking is generally the best choice for Illinois because it resists moisture, rot, and temperature swings better than wood. It never needs staining or sealing, and it handles the freeze thaw cycles that cause wood to crack. However, wood decks are still a solid option if you are on a budget and willing to maintain them with annual sealing. Burns Carpentry builds both wood and composite decks and can help you choose based on your budget and maintenance preferences.
How long does it take to build a deck in Cary?
Most deck projects in Cary take three to five weeks from the initial consultation to final inspection. That includes time for design, permit processing (about one to two weeks), and construction (one to two weeks). Weather can cause delays, but a good builder will communicate those changes. Burns Carpentry provides a clear timeline upfront and keeps you updated throughout the process.
If you are a Cary homeowner thinking about a deck this spring or summer, the best next step is a conversation with someone who has built dozens of them in your area. Burns Carpentry offers free estimates and will walk you through every question on this list. Give them a call or reach out through their website. They will tell you straight up whether a deck is right for your property and what it will take to build something that lasts.
