How to Quote a Window Replacement Job

Quote per opening. Windows are manufactured, ordered, and installed by the unit, so a per-opening number matches how the job actually runs and how the client thinks. A square-foot rate hides the fact that a small bathroom window and a large picture window carry very different costs. Per-opening pricing also makes change orders clean when a homeowner upgrades one window to a casement or a different product line.

List each opening with its size, product line, and install type. The clarity wins jobs because the client can see precisely what they are paying for and compare your bid against another contractor line by line.

Installed replacement windows run $450 to $1,400 each in 2026. Vinyl is the low end at $450 to $900, while fiberglass and wood-clad run $700 to $1,400. A ten-window vinyl project commonly lands at $6,500 to $11,000 including labor, trim, and disposal. Full-frame replacement costs more than a pocket or insert install because it involves removing the old frame and reworking the surrounding structure.

Material choice drives most of the spread. Walk the client through the trade-offs between vinyl, fiberglass, and wood-clad so the product line is their decision, priced openly on the quote.

Second-story and hard-access openings, full-frame versus insert replacement, rotted framing that needs repair, custom or odd sizes, and historic-district requirements all raise labor. Egress windows in bedrooms carry code requirements that add scope. Note every one of these on the walkthrough so the quote is accurate the first time and you never have the awkward mid-job change order conversation.

Exterior capping, interior trim, and old-unit disposal are labor too. Price them as their own lines so the per-opening install rate stays clean and comparable.

You enter each opening, size, and product line, and the AI drafts per-opening material and labor lines with your markup applied. A full-house window quote that used to take hours is ready in about 25 minutes. The accepted quote turns into the project schedule, the order list, and the milestone invoice, all run from your phone, with a platform fee of 2% per job (1% each side), capped at $250, no per-lead fees.

Window jobs lose money in the gap between the bid and the field. A pocket insert quoted on a wall that actually needs full-frame replacement, a rotted sill discovered after demo, or a custom size that was measured wrong all turn a profitable job into a loss. Accurate quoting starts with a careful measure of every opening and an honest note of access, egress, and condition. When each opening is its own line with its own product and install type, a surprise becomes a clean change order rather than an argument. Per-opening pricing also speeds reorders and warranty work later, because you have an exact record of what went into each hole in the wall. The discipline of measuring and itemizing is the cheapest insurance a window contractor can buy.