The number a homeowner wants is a published “$1,800 installed” 6-foot vinyl 2-panel special, or a “$400 to swap a slider” coupon. That number is not a takeoff. A 6-foot vinyl retrofit on a ground patio is not the same job as a 16-foot 4-panel impact-rated new-construction unit with a transom, a new sill pan, and second-story balcony access. The trip is the same. The hours are not.
Open the free bid calculatorEntry-door calculators price sidelights, jamb rot, and a storm door. Window-replacement calculators price united inches and flashing. A sliding or patio-door hang is a different job: the panels, the glass, the install method, and the extras that are not in the coupon. Quoting all of that from a published installed special is how the first sill-pan rebuild eats the field margin.
Each extra panel is time and glass that never appears on the coupon. Impact glass, a full-frame wrap, a transom, a sill pan, and balcony access are billed as their own hours. On the sample rates a 16-foot 4-panel fiberglass unit with impact glass, new-construction wrap, transom, sill pan, threshold rebuild, screen, interior trim, tear-out, and balcony access prices about $23,344.28 (32.6 crew-hours). The same shop’s 6-foot vinyl brochure hang prices about $2,770.12 (7.4 hours, walk-away $1,883.68). Matching the brochure job’s $1,800 special on the 4-panel house is how that job becomes a loss — the walk-away on the heavy job is already $15,874.11, and the $1,800 special loses about $14,074 there. The $1,800 special loses $83.68 even on the brochure hang.
A 12-foot 3-panel vinyl hang with triple-pane glass, new-construction wrap, screen, interior trim, and a sill pan is not the 6-foot brochure hang plus 15%. On the sample rates that 3-panel job prices about $7,975.38 (22.2 crew-hours). A retrofit pocket drops wrap hours; extra panels and impact glass do not disappear with the pocket. Treating either as a blended add-on is how the special that looked fine turns into a loss after the first sill-pan rebuild.
A $48/h installer loaded at 32% payroll burden is $63.36. Margin is a share of the price you send, not a markup on cost. The walk-away price is total cost — below that the job makes nothing before you take a dollar home. Replace every rate with your invoices before you send either number.
This is not a door design, a building-code determination, a permit, an engineering stamp, or a recommended market price. It is arithmetic on the numbers you type. The opening, the unit, glass, install method, flashing, and trim are yours to confirm. It does not price a pedestrian entry door or a window replacement.
Charge from the trip, the set, extra panels, glass (dual, triple, or impact), install method (retrofit pocket versus new-construction wrap), balcony access, screen, transom, interior trim, sill pan, loaded labor, overhead, and a margin that is a share of price. A default 6-foot vinyl 2-panel retrofit on a ground patio, at the sample rates in this calculator, prices around $2,770 — about 7.4 crew-hours.
Homeowners count a patio door. Extra panels, impact glass, a full-frame wrap, a transom, a sill pan, and a balcony do not scale with that number. Matching a cheaper special written for a 6-foot vinyl hang is how a 4-panel impact balcony job becomes a two-day loss. On the sample rates the $1,800 special already loses about $84 on the brochure hang (walk-away $1,884) and loses about $14,074 on the 4-panel house whose walk-away is already $15,874.
A 16-foot 4-panel fiberglass unit with impact glass, new-construction wrap, transom, sill pan, and balcony access is not a 6-foot vinyl special. On the sample rates that job prices around $23,344 (32.6 crew-hours), while a 6-foot vinyl brochure hang prices around $2,770 (7.4 hours).