How to Read a Deck Contractor Quote (2026)

Eight things, separated rather than lumped together. Framing, with joist and beam sizes, spacing and the ledger attachment method. Decking, with the brand, line and colour named, so Trex Enhance in Saddle rather than the word composite. Railing, with the material and the linear footage, since railing is both expensive and routinely under-quoted. Stairs, with the number of steps, stringers and landing priced separately. Footings, with type, count and depth, which must reach below the local frost line. Permits and inspections, stating who pulls the permit and whether the fee is included. Demolition and haul-away if an old deck is coming out. And labour, broken out from materials or at least clearly accounted for. Materials and labour typically split close to half and half, with labour running 40 to 60 percent, so a bid that is nearly all of one and vague about the other deserves questions.

Ten to 30 percent is the normal range, taken to schedule the job and order materials, which is a genuine cost the contractor incurs before arriving. Treat a demand for 50 percent or more before any work as a warning rather than a negotiating position. Structure the rest against milestones: materials delivered, framing complete and passed inspection, decking installed, and a final payment held until the work passes final inspection and you have walked it with the contractor. Never pay in full up front, and be wary of a discount offered specifically for doing so. Two documents belong with the payment schedule. A written workmanship warranty, which is separate from and additional to the manufacturer's material warranty, and proof of licence and insurance, both of which are worth verifying yourself rather than accepting a photocopy.

Nearly always because something is missing, and the common omissions are predictable: the permit fee, the demolition and haul-away of the old deck, railing footage, footing depth, or a framing specification that quietly assumes wider joist spacing than the decking allows. Occasionally the difference is real, from a contractor with lower overheads or a gap in the schedule, but that is the less likely explanation. Interrogate the low bid exactly as hard as the high one, line by line against the others, and ask specifically what happens if the footing inspection requires deeper holes or the ledger reveals rot. A bid that becomes the same price as its competitors once the missing items are added was never cheaper; it was just less complete, and change orders mid-build are negotiated from a much weaker position than a quote is.

Yes, and their willingness to do it tells you something. A licensed contractor pulls the building permit as a matter of routine and manages the footing, framing and final inspections, because those are scheduled around their own work. A bid that skips the permit to look cheaper is offering you a saving of $130 to $450 in exchange for fines of $500 to $2,500 if discovered, possible removal or retroactive permitting at roughly double the fee, and a gap in your property's permit record that will surface when you sell. There is a legitimate alternative where you pull the permit yourself to save the contractor's markup, but it generally makes you the contractor of record and therefore responsible for code compliance and inspections. Unless you specifically want that role, let the contractor do it and confirm in writing that the fee is included.

Start before the quotes arrive by producing your own independent estimate of size, material and features, so you have a baseline to measure all three against and can tell quickly whether a bid is out of range. Then insist all three bids cover identical scope: the same dimensions, the same decking line, the same railing system, the same number of stair steps. Line them up item by item and normalise the differences, since one may include demolition or a permit that another excludes. Question the outliers at both ends. Finally, weigh the things that are not price: licence and insurance verified independently, references you actually call, who handles the permit, the workmanship warranty in writing, and any manufacturer certification, which on composite installations can carry enhanced warranty terms a non-certified installer cannot offer.