If you’re a Cary homeowner thinking about adding a deck this year, you’ve probably typed “Deck Building Cary” into Google more times than you’d like to admit. And you’re not alone. The most common questions we hear from local homeowners are surprisingly consistent. After building hundreds of decks across McHenry County, we’ve collected the five questions that come up in nearly every consultation. Here’s what you really need to know before you break ground in 2026.
1. Do I Need a Permit for My Deck in Cary, IL? (2026 Update)
Yes, you almost certainly need a permit. The Village of Cary requires a building permit for any deck that is attached to the house, exceeds 200 square feet, or is elevated more than 30 inches above grade. Even freestanding decks that sit lower than 30 inches often need a zoning permit, especially if they’re within a certain distance of property lines. The exact threshold is 5 feet from the side lot line and 10 feet from the rear lot line for most residential zones in Cary.
What most homeowners don’t realize is that the permit process isn’t just a bureaucratic hoop. It’s a safety net. When you pull a permit, the village inspects the footings, the framing, the ledger board attachment to the house, and the final railing height. Those inspections catch mistakes that could cost you thousands later. We’ve seen decks with improperly bolted ledgers that would have pulled away from the house under snow load. A permit catches that before it becomes a hazard.
The good news is that a reputable builder handles the entire permit application for you. Burns Carpentry manages all the paperwork with the Cary municipal offices, including the structural calculations and site plan drawings that the village requires. The permit fee itself is typically $200 to $400 for a standard residential deck, depending on size, and it’s baked into the project estimate. If a builder tells you a permit is optional or suggests you can skip it, run the other direction. That’s a red flag that signals corner cutting on every level of the job.
2. Which Deck Material Is Best for Cary’s Climate: Wood or Composite?
Cary’s climate is a mixed bag. We get humid summers with temperatures pushing into the 90s, freezing winters that dip below zero, and enough freeze-thaw cycles to test any outdoor structure. The material you choose has to handle all of it without warping, cracking, or rotting.
Pressure treated wood is the traditional choice and it’s still a solid option if you’re working with a tighter budget. A standard wood deck from Burns Carpentry’s Essential Deck Package runs about 30 to 40 percent less than a composite deck of the same size. The trade off is maintenance. Wood needs to be cleaned and sealed every one to two years in this climate. Skip that cycle twice in a row and you’ll start seeing splintering, gray discoloration, and eventually rot in the boards that sit closest to the ground where moisture collects.
Composite decking has become the dominant choice for Cary homeowners in the last five years, and for good reason. Modern composites like the materials we use in our Preferred Composite Deck Package resist moisture, UV fading, and temperature expansion far better than wood. They never need staining or sealing, which saves you about $300 to $600 every two years in maintenance supplies and labor. The boards are also engineered with a capped surface that resists mold and mildew, a real advantage in Cary’s humid summers.
Which one should you choose? If you plan to stay in your home for more than five years and you hate the idea of weekend maintenance projects, composite is the better long term value. The upfront cost is higher, but you’ll recover that difference in avoided maintenance alone within seven to ten years. If you’re flipping the house or working with a hard cap on the budget, a well built wood deck with proper joist spacing and galvanized hardware can still last 15 to 20 years with consistent care. Burns Carpentry builds both options, and we’ll walk you through the material trade offs during the consultation so you’re not guessing.
3. How Long Will My Deck Project Take from Start to Finish?
From the first phone call to the last screw, a typical deck project in Cary takes three to five weeks. That timeline accounts for the real world delays that every outdoor project hits: weather, material availability, and the permit review cycle at the village office.
Here’s how the timeline breaks down with Burns Carpentry’s process. Week one is the initial site consultation and detailed design planning. We meet at your property, take measurements, discuss your vision, and sketch out the layout. Week two covers the material selection review and permit application. We submit the drawings to Cary and order the lumber or composite decking. The permit review typically takes three to five business days in Cary, assuming the plans are clean and complete. Week three is site preparation and precision framing installation. We dig footings, pour concrete piers, and build the frame. Week four is decking and final finishes. The deck boards go down, railings go up, and we do the final cleanup.
Of course, that’s the ideal scenario. If we hit a stretch of rain that makes concrete pours impossible, or if a specific composite color is backordered by two weeks, the timeline stretches. We communicate every delay immediately. The important thing is that we don’t rush the work to hit an artificial deadline. A deck frame that’s built in the rain without proper drying time will shrink and twist as it dries, causing gaps and squeaks for years. We’d rather wait an extra week than deliver a deck that needs repairs in its first season.
4. What’s the Real Cost of Deck Building in Cary Right Now?
In the Cary market during spring 2026, a professionally built deck runs between $35 and $55 per square foot for the complete project. That includes materials, labor, permits, and cleanup. A 300 square foot deck, roughly 12 by 25 feet, a common size for Cary backyards, lands between $10,500 and $16,500.
What drives the variation? The biggest factor is material choice. A basic pressure treated wood deck using the Essential Deck Package falls at the lower end of that range. A composite deck using the Preferred Composite Deck Package sits at the higher end, especially if you add features like built in planters, a pergola, or multi level platforms. The Premium Outdoor Living Package, which combines composite decking with a custom pergola and integrated lighting, runs closer to $65 to $75 per square foot.
Other variables include the complexity of the site. If your backyard slopes steeply, we need deeper footings and more structural engineering. If the deck is more than 18 inches off the ground, we add staircases and intermediate landings that increase the cost. If your existing patio or concrete slab needs removal before we start, that’s another $500 to $1,500 depending on access and disposal fees.
We give every client a detailed itemized estimate before any work begins. There are no surprise charges. The estimate includes the exact cost of materials, the labor hours we anticipate, the permit fee, and a line item for any contingencies. If we find unexpected issues during demolition, like rotted rim joists on the house that need replacement, we stop and discuss the options with you before proceeding. You’ll never get a bill for something you didn’t approve first.
5. How Do I Choose a Reliable Deck Builder in Cary?
This is the question that makes or breaks the entire project. A great builder turns a good design into a deck that lasts decades. A bad builder turns a dream into a lawsuit. Here’s what to look for when you’re vetting contractors.
First, verify licensing and insurance. Burns Carpentry is fully licensed and insured to work in Cary, with current credentials for McHenry County and all surrounding Illinois areas. We carry comprehensive liability insurance and worker’s compensation coverage. Ask any builder for their license number and a certificate of insurance. If they hesitate or say they’re “covered under a friend’s policy,” walk away. You don’t want to be liable if a worker gets injured on your property.
Second, ask for references from projects completed in the last 12 months. Call those references and ask three specific questions: Did the crew show up on time every day? Did the builder communicate delays clearly? Would you hire them again? The answers to those questions tell you more than any portfolio photo ever will.
Third, look for a builder who offers a workmanship warranty. Burns Carpentry guarantees our workmanship for a full two years from the date of completion. The materials we install carry their own manufacturer warranties, typically 25 years to lifetime for composite decking and 10 to 15 years for pressure treated wood. A builder who doesn’t stand behind their work is telling you they don’t expect it to hold up.
Fourth, pay attention to how the builder communicates during the estimate process. Do they listen to your ideas or do they push their own design? Do they explain the pros and cons of different materials honestly? A good builder will tell you when you don’t need the most expensive option. We regularly steer clients toward Wood Decks when their budget is tight and they’re willing to maintain it, because that’s the right call for their situation. A builder who pushes the priciest package without explaining why is putting their profit ahead of your needs.
Frequently Asked Questions
How much does a deck cost in Cary, Illinois?
In 2026, a professionally built deck in Cary typically costs $35 to $55 per square foot, with a 300 square foot deck running $10,500 to $16,500 for the complete project including materials, labor, and permits. The final price depends on material choice, site complexity, and any added features like stairs or built in seating.
Do I need a permit for a deck in Cary?
Yes, Cary requires a building permit for any deck attached to the house, over 200 square feet, or elevated more than 30 inches above grade. A reputable builder like Burns Carpentry handles the permit application with the village, including the required structural calculations and site plans.
Is composite decking worth the extra money?
For most Cary homeowners who plan to stay in their home for more than five years, yes. Composite decking eliminates the need for staining and sealing every one to two years, saving $300 to $600 per maintenance cycle, and it resists Cary’s humid climate better than wood. The higher upfront cost is typically recovered within seven to ten years in avoided maintenance alone.
How long does it take to build a deck in Cary?
A typical deck project from initial consultation to completion takes three to five weeks. This includes design, material selection, permit application, footings, framing, and final decking. Weather and material availability can extend that timeline, but a professional builder keeps you informed every step of the way.
If you’re ready to start your deck project in Cary, give Burns Carpentry a call. We’ll schedule a free on site consultation, walk through your options honestly, and give you a detailed estimate with no pressure. We’ve been building decks that survive Cary winters and summers for years. We’d love to build yours.
