The address confirms the city, the neighborhood access conditions, and the service area before the assessment is scheduled. The property type — residential home, commercial office building, retail strip, hotel, industrial facility, HOA complex — determines which crew configuration and equipment kit the assessor brings to the visit.

Floor count determines the access method — water-fed pole, boom lift, or SPRAT/IRATA certified rope access — and access method is the largest single variable in window cleaning pricing. A 3-story building and a 12-story building in the same Los Angeles neighborhood require completely different crew certifications, equipment, and project timelines. If only certain floors need service — for example, the lobby and top floor only — specifying that upfront narrows the scope before the assessment visit begins.

For residential properties: an approximate count of individual window panes (not frames) helps estimate service time before the physical visit. For commercial buildings: the approximate facade width in linear feet on each elevation — or a floor plan if available — allows a preliminary scope calculation. You do not need an exact count. “Around 40 windows on two floors” or “roughly 80 feet of glass curtain wall on the south elevation” is enough for the assessment to be well-focused before arrival.

Anti-reflective (AR) coated glass, low-E coated glass, frameless structural glass, historic divided-light windows, decorative etched glass, tinted film, and mirrored glass all require different cleaning chemistry than standard commercial float glass. Using the wrong chemistry on coated glass — specifically alkaline degreaser on AR-coated panels — causes permanent coating damage. If you know your building has specialty glass from the architect, the building specification, or a previous window cleaning company’s note, mention it before the assessment visit. If you are unsure, the assessor will identify glass types on-site.

Exterior glass only, interior and exterior, screens and tracks included, sill cleaning, gutter check, bird guano treatment, hard water stain removal — the scope of the service changes the time, chemistry, and crew configuration required. Stating your scope preference before the assessment means the assessor arrives with the complete kit for what you actually want, not a generic window cleaning loadout that misses items you assumed were included.

One-time clean, quarterly, bi-monthly, or annual — service frequency affects the per-visit pricing on a scheduled contract, and changes what the assessor recommends based on your property’s specific soiling environment. A residential home in Beverly Hills and a commercial building adjacent to the 405 freeway in Torrance face different soiling rates and benefit from different frequency recommendations. Knowing your preference upfront means the written quote includes frequency options side by side for easy comparison.