How to Read a Deck Quote: A Homeowner's Guide to Comparing Bids

You've collected three quotes for your deck project. They range from $24,000 to $48,000. The cheapest seems too good to be true. The most expensive seems hard to justify. The middle one looks reasonable but you can't quite tell why it's different from the cheapest.

This is the most common position homeowners find themselves in when starting a deck project — and the source of most of the bad outcomes we hear about later. The problem isn't usually that homeowners pick the wrong bid. It's that they don't realize they're comparing different projects that happen to share a footprint.

Here's how to read a deck quote properly and compare bids in a way that actually tells you something useful.

Step 1: Look for a Detailed Scope, Not Just a Price

A good deck quote tells you what's being built — not just what it costs. The proposal should include:

•       Total deck dimensions and square footage

•       Decking material brand, line, and color

•       Framing material (pressure-treated wood, steel, hybrid)

•       Joist spacing (16" on center? 12"? Why?)

•       Fastener type (face screws or hidden fasteners)

•       Railing brand, material, height, and style

•       Stair details — number of treads, stringers, handrails

•       Footing specs — size, depth, quantity

•       Ledger attachment method and flashing

•       Skirting, fascia, and trim details

•       Demolition and disposal of any existing structure

•       Permit and inspection coordination

•       Cleanup expectations

A quote that says "Build composite deck, $32,000" is not a quote. It's a number with a label. You can't compare it against anything because you don't know what it includes.

Step 2: Confirm What's NOT Included

Just as important as what's in the scope is what's excluded. Common exclusions to watch for:

•       Permit fees (sometimes pulled separately at extra cost)

•       Engineering or architectural drawings

•       HOA approval fees or revision work

•       Demolition of existing deck

•       Disposal fees and dumpster

•       Repair to siding, gutters, or trim where the deck attaches

•       Electrical work for lighting or outlets

•       Hot tub, fire feature, or built-in accessory costs

•       Landscaping repair after the build

•       Sales tax (some builders bury it, some break it out)

A bid that's $24,000 with most of these excluded can quickly become a $30,000+ project. A bid that's $32,000 with all of them included is the same project at the all-in number.

Step 3: Check the Joist Spacing

This one matters more than homeowners realize. Most composite and PVC decking manufacturers require specific joist spacing — typically 16" on center for residential applications, 12" on center for diagonal patterns or certain premium lines. Going wider (24" on center is common in cheaper bids) saves materials and labor but voids the decking manufacturer's warranty.

If one bid quotes 24" joist spacing on composite decking, the deck might fail prematurely, and the manufacturer's warranty won't cover it. That's not a bid for the same deck — it's a bid for a substandard structure.

Ask each builder to specify the joist spacing in the proposal and to confirm it meets the decking manufacturer's warranty requirements.

Step 4: Look at the Fastener Method

Hidden fasteners vs face screws is a major aesthetic and durability decision. Hidden fasteners (clips that attach boards to joists from below or via the groove) are slower to install but produce a clean surface with no visible screw heads. Face screws (screwed through the top of the board) are faster and cheaper but leave a row of visible screws every 16 inches.

Premium composite and PVC boards are almost always installed with hidden fasteners. A bid that face-screws premium boards is cutting labor cost in a way that compromises the finished product.

Step 5: Verify the Ledger Detail

The ledger is the board that attaches the deck to your house. Failed ledger connections are the single most common cause of deck collapses in the country. A proper ledger detail should include:

•       Through-bolts or lag screws sized for the load (not just nails or deck screws)

•       Proper flashing to keep water from getting between the ledger and the house

•       Blocking behind the ledger to prevent torsion

•       Connection to the house framing, not just the rim joist or siding

If a quote doesn't address how the deck attaches to the house, ask about it specifically. The builder's answer tells you a lot about whether they understand structural fundamentals.

Step 6: Confirm Permitting Is Handled

A reputable bid includes permit acquisition by the contractor in their own name. The proposal should reference the permit, and the cost should either be included or itemized separately.

Bids that say "permits not included, homeowner responsible" or "we'll see if a permit is needed" are red flags. Permits matter for safety, insurance, and resale. Don't let a builder push that responsibility onto you.

Step 7: Check Insurance and Licensing Mentions

A professional bid often references the builder's license number and insurance. If it doesn't, ask. South Carolina requires general contractors to be licensed for residential work over $5,000. Builders should also carry general liability and workers' comp insurance.

A builder who can produce a current certificate of insurance on request is the kind you want. One who can't is one to avoid.

Step 8: Look at the Payment Schedule

A reasonable payment schedule for a typical deck looks like:

•       25–35% deposit at signing (to secure spot and order materials)

•       Progress payment at framing complete or materials delivered

•       Final payment at substantial completion / final inspection passed

Be cautious of:

•       Deposits over 50%

•       Full payment due before completion

•       Payment terms that don't tie to milestones

•       Demands for cash or off-the-books payments

Step 9: Read the Warranty Section

Two warranties matter:

•       Materials warranty: The manufacturer's warranty on the decking, railing, and fasteners. The builder doesn't control this — it comes from the manufacturer. But the proposal should specify what's covered.

•       Workmanship warranty: The builder's warranty on labor and installation. Industry standard is 1–2 years. Better builders offer 5+ years on workmanship.

A short or unclear workmanship warranty signals a builder who isn't planning to stand behind their work. A clear, multi-year warranty signals confidence.

Step 10: The Apples-to-Apples Test

Once you've reviewed all the bids on the above factors, you should be able to answer:

•       Are all three using the same decking brand and tier?

•       Are all three using the same railing system?

•       Are all three at the same joist spacing?

•       Are all three using hidden fasteners (if that's what you want)?

•       Are all three including the permit?

•       Are all three including demolition (if applicable)?

•       Are all three offering similar workmanship warranties?

If the answer to any of these is no, then the bids aren't comparable. You're looking at different projects at different price points, not three bids for the same deck.

What a Red-Flag Bid Looks Like

Combining a few of these signals tells you almost everything you need to know:

•       A one-page bid with minimal detail

•       No mention of permits

•       Joist spacing not specified

•       Demand for 50%+ deposit

•       Vague "materials TBD" language

•       No license or insurance information

•       Short or undefined workmanship warranty

•       Significantly lower price than other bids without clear reason

Three or more of these in a single bid is a project that will go sideways.

What a Quality Bid Looks Like

On the other side:

•       Multi-page detailed proposal

•       Specific material brands and lines listed

•       Framing details and joist spacing called out

•       Permit handled by builder

•       Reasonable milestone-based payment schedule

•       License number and insurance referenced

•       Multi-year workmanship warranty

•       Clear inclusions and exclusions

•       Phone number, email, and physical address listed

Bottom Line

The cheapest bid is rarely the cheapest project. The most expensive bid isn't always the highest quality. The right way to compare deck quotes is to verify they're for the same project — same materials, same structural specifications, same scope, same warranty. Once you've leveled the playing field, the right bid usually becomes obvious.

A good builder will welcome detailed questions about their proposal. The exercise of walking through scope line by line is a chance for them to demonstrate expertise. A builder who gets impatient with the comparison is a builder you don't want.

About Pocatko Builders

Pocatko Builders specializes in outdoor living projects — decks, railings, screened porches, and pergolas — across the Lake Wylie, Fort Mill, Tega Cay, and Clover area. If you'd like to talk through a project, here's how to reach us: