Why Two Quotes Differ So Much

Interior included or not

This is the single largest source of difference between two quotes for what sounds like the same job. Exterior-only is far quicker than interior and exterior together, since interior work typically runs about one and a half times the labor per pane of exterior work alone, because of furniture, blinds, drop cloths, and sill protection involved on every window rather than just some of them. A quote that looks dramatically cheaper than the others you collected is very often exterior only, not a genuinely better price on the same scope of work. Comparing them as though they are the same purchase is comparing two different services that happen to share a name, and neither number is dishonest once you know which is which.

How the glass is counted

Pricing by pane count is the honest method, because pane count, not house size, is what actually drives time spent on site. A pane is one side of one piece of glass in a frame, so a double-hung window with an upper and lower sash counts as two panes, and interior and exterior sides are counted separately from each other. A house with divided lights or grid windows can carry two or three times the panes of a similar-sized house built around large fixed picture windows, since every small section inside a grid gets worked by hand at its own edges. A company quoting by square footage instead is either guessing or pricing in a margin to cover the guess.

Screens, tracks and sills

Screens add real time because each one is removed, tracked to its own opening, cleaned if that is part of the visit, and refitted afterward, since near-identical screens are not actually interchangeable between openings. Tracks and sills add more again, since vacuuming grit out of a track and wiping a sill down is a different motion entirely than squeegeeing glass, and it happens on every window rather than once for the whole house. If one quote includes screens and tracks and another quotes glass only, the two numbers describe genuinely different jobs rather than the same job priced two ways. Screens with Reflekt are a flat $50 added to a window service, and free once a year on any membership.

Insurance, employees and the things you cannot see

A company carrying genuine liability insurance, paying into workers' compensation, and employing its crew rather than subcontracting to whoever is available has real costs an uninsured operator working alone simply does not carry. General liability coverage for a small service business is commonly written around a million dollars per occurrence, and that cost sits inside every honest quote a legitimate company sends out, whether or not the homeowner ever sees it broken out as a line item. That gap shows up in the price, and it is exactly what you are buying if a ladder ever goes through a window or someone gets hurt working on your property. It is a real structural difference rather than padding, and it is completely invisible from the outside looking at two numbers side by side.

Hard water and first cleans

If glass carries mineral deposit from sprinkler overspray, or a new build still has construction residue like stucco splatter or paint overspray sitting on it, that is separate work priced by severity rather than folded quietly into a normal clean. Light seasonal film often lifts during a routine pure-water clean without any extra effort. Years of baked-on calcium takes an abrasive restoration pass, pane by pane, by hand, and it reasonably costs more than glass that has simply gone a few weeks without attention. A company that inspects the glass first and prices staining separately is giving an honest number up front. A company quoting one flat rate sight unseen over the phone is either skipping that inspection entirely or planning to raise the price once the crew is standing in front of the actual windows.