Most homeowners shopping for a deck builder are comparing three quotes that are all over the map in price, with no real way to tell if the low one is a good deal or a corner-cutter. There are ways to tell. They just aren't the ones people usually ask about.
Elizabeth and the towns around it, Union, Roselle, Linden, Hillside, have a real mix of housing stock. Parts of Elizabeth go back to the early 1900s with balloon-framed houses and additions that were never quite square. Newer construction out toward the edges of Union County is more standardized, easier to attach to, more predictable framing. A builder who's only ever worked on new subdivisions can get caught off guard by an old rim joist that's rotted behind the siding or a foundation that's settled two inches on one corner. Ask anyone bidding your job how they handle an older house, not just what they'd do on a blank slate.
Permits are not optional, and a builder who skips them is telling you something
Elizabeth's construction department issues permits for deck work, and almost any deck attached to the house needs one, along with a plan review and at minimum a footing inspection, a framing inspection, and a final. If a builder tells you a permit isn't necessary for a deck this size, that's not a shortcut they're offering you, that's a liability they're handing you. An unpermitted deck can hold up a home sale years later, and it means nobody with any authority ever checked that the footings are deep enough or the ledger is attached correctly. Get the permit. It costs some money and adds a couple weeks, but it's the only outside check you get on the work.
Footings have to go below the frost line, no matter what the old deck did
New Jersey's residential code calls for footings at a minimum of 36 inches below grade. That's not a suggestion, it's how you stop the ground from heaving a footing up over a few winters of freeze and thaw. Union County gets a real freeze-thaw cycle from December into March, and there's enough clay in the soil around here that water doesn't drain through it fast. Clay holds moisture, freezes, expands, and pushes on anything shallow. If a contractor is proposing to reuse the existing footings on a deck rebuild without checking their depth, ask them to check. A lot of decks built in the 80s and 90s around here were set on footings that were nowhere close to 36 inches, and they've been slowly working their way up ever since, which is part of why the deck feels bouncy or the railing posts have started to lean.
The ledger board is where almost every deck failure starts
If you want one thing to look at when a builder walks you through their plan, it's how the deck attaches to the house. The ledger board, the piece bolted to your rim joist that the whole deck hangs off of, needs to be lagged or through-bolted, not nailed, and it needs proper flashing above it so water doesn't run down behind the siding and rot the band joist from the inside. This is the single most common failure point in residential deck collapses nationally, and it's almost always because the ledger was nailed on and never flashed. It looks fine for years. Then it doesn't. Ask specifically how they're flashing the ledger. If the answer is vague, that's your answer.
Materials tell you more than the sales pitch does
Pressure-treated pine is still the standard for framing here, and it should be rated for ground contact anywhere it's within 6 inches of soil or sits on a footing. For the decking surface itself, homeowners are usually choosing between PT lumber, cedar, or composite boards like Trex or TimberTech. Composite costs more up front but doesn't need the staining and sealing that wood does every 2 to 3 years, which matters in a climate with humid summers and salty air rolling in off Newark Bay that speeds up wood weathering. If a bid seems unusually low, check the joist spacing they're planning. Composite decking generally needs joists on 16-inch centers, sometimes tighter if the boards run at an angle, and some crews will frame at 24 inches to save lumber and labor, which leads to boards that flex and eventually crack. Ask for the spacing in writing.
Insurance, license, and what a real quote looks like
New Jersey requires home improvement contractors to be registered with the state, and that registration number should be easy for them to give you without hesitation. Ask for proof of liability insurance too, since a worker falling off a second-story deck frame is not a hypothetical, it happens, and you don't want that landing on your homeowner's policy. A real quote should spell out footing depth, lumber grade and treatment, fastener type, and whether the price includes the permit and inspections or you're handling that separately. If a quote is one line item, "deck installation, materials and labor, $X," that's not a quote, that's a guess with a number attached.
What to walk away from
Walk away from anyone who wants full payment up front. A deposit is normal, the balance should follow the work. Walk away from a contractor who can't tell you where the footings are going relative to your property line, since Elizabeth lots can be tight and a setback issue found after the concrete's poured is expensive to fix. And walk away from anyone dismissive when you ask about flashing, frost depth, or permits. Those aren't gotcha questions, they're the three things that decide whether your deck is standing in fifteen years or sagging in five.
We've framed and repaired enough decks around Union County to know which of these corners get cut and what it costs the homeowner later. If you're getting quotes and want a second opinion on one, or you're ready to talk through a new build or a repair, take a look at our deck builder work and reach out.