How Long Does Window Cleaning Take?

If you are booking a window cleaning and trying to plan your day around it, the short answer is that a professional cleaning of an average home usually takes 1 to 3 hours. But that range shifts a lot depending on how many windows you have, how dirty they are, and whether the cleaner is doing both the inside and outside. Here is a realistic breakdown so you know what to expect.

Typical timeframes by home size

For professional window cleaning, rough estimates by property size:

• Small condo or apartment: about 1 to 2 hours
• Average home (roughly 1,500 to 2,500 sq ft, 10 to 25 windows): about 2 to 3 hours
• Larger or multi-story home: about 4 to 6 hours or more, especially when both interior and exterior windows are done

A useful benchmark: an average house has 20 to 25 windows including sliding glass doors, though some homes have 40 or more, which naturally extends the time. Professionals are considerably faster than a DIY attempt at the same house, because they use efficient techniques and tools like squeegees, extension poles, and purified water-fed systems. The same job that takes a crew a few hours can eat up most of a weekend if you do it yourself, a trade-off we weigh in detail in our professional vs. DIY comparison.

How this varies across California

The ranges above hold anywhere, but the housing stock around you shifts where most jobs land within them. Dense urban markets like San Francisco have a high share of condos, apartments, and flats, which sit at the shorter end of the scale, often closer to the one-to-two-hour mark. Suburban markets like Sacramento and San Jose have proportionally more large, multi-story single-family homes with higher window counts, which pushes a typical visit toward the longer end.

Terrain plays a part too. Homes on hillsides, or with steep or uneven ground close to the walls, take longer to set up for, because ladders and water-fed poles need stable footing before any cleaning starts.

What makes it take longer or shorter

Several factors move the timeline in either direction:

Number of windows. The most obvious one. More glass means more time, straightforwardly.

Interior and exterior, or just one side. Cleaning both sides roughly doubles the work compared with exterior-only. Exterior glass also tends to be dirtier and can take longer per window.

Level of dirt and buildup. Light dust wipes away quickly. Heavy grime, hard-water spots, or windows that have not been cleaned in a long time take extra passes and more time.

Window style. This surprises people: a small home with lots of multi-pane windows, French panes, or divided-light glass can take longer than a larger home with wide, modern single panes, because each small section has to be cleaned individually. Bay windows, skylights, and conservatories add time too.

Access and height. Upper-floor and hard-to-reach windows require ladders or specialized equipment, which slows the pace compared with easy ground-floor access.

Cleaning method. Traditional hand-washing with a squeegee tends to be slower than modern purified-water-fed pole systems, though the right method depends on the property.

Setup and teardown. The quoted time includes arriving, setting up, and packing down, not just the cleaning itself.

Recurring visits are faster

Once you are on a regular cleaning schedule, later visits usually take less time than the first. When windows are maintained on a routine, there is less buildup to remove each time, so the crew moves faster. That is one of several reasons recurring service often costs less per visit than one-off cleanings (we cover that in our cost guide), and our guide to how often to clean your windows sets out a sensible schedule for California homes.

How long for commercial buildings?

Commercial jobs run longer and vary widely by building. Low-rise commercial buildings often take 4 to 8 hours, a typical three-story office can be done in about half a day, and storefronts with large glass frequently finish in 3 to 5 hours. The scope and access differences behind those longer timelines are set out in our residential vs. commercial guide. High-rise work is a different category entirely, sometimes stretching across multiple days, because of the specialized access equipment and safety setup involved, which we explain in our high-rise guide.

How to help it go faster

A few simple things on your end can speed up a residential visit:

• Clear access to the windows by moving furniture, plants, or decor away from the glass ahead of time.
• Shift curtains and blinds aside so the cleaner can get straight to work.
• Move delicate items off sills and away from windows.
• Point out problem windows (heavy staining, a stuck or damaged screen) up front so the cleaner can plan for them.

A little preparation lets the crew spend their time cleaning rather than clearing space.

The bottom line

For most homes, plan on 1 to 3 hours for a professional window cleaning, more for larger or multi-story homes and full interior-plus-exterior jobs. The best way to get an accurate estimate for your specific home is to ask when you book, since a good company can gauge the time from your window count, home size, and what needs cleaning. You can browse and compare window cleaning providers across California on SparklingPanes by city and county, check ratings and review counts, and ask about timing and scheduling when you request a quote.