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  1. Submitted By: Jose D — September 17, 2007
    +20 votes
      + -

    Assuming 10,000 city blocks, 600 windows per block, five minutes per window, and a rate of $20 per hour, about $10 million

  2. Submitted By: SoumyaKant Panda — September 27, 2007
    -6 votes
      + -

    I would charge 20$per hour …

  3. Submitted By: ChingChang — October 3, 2007
    -10 votes
      + -

    I’d charge $5 per window. I’ll be one happy multimillionaire window washer.

  4. Submitted By: Lokesh — November 2, 2007
    +2 votes
      + -

    assuming a population of 1 million => 0.5 million homes (assuming an occupancy of 2) => 1.5 million windows (assuming 3 windows per house) => 15 million (charging 10 $ per window)

  5. Submitted By: Dustin — November 19, 2007
    +24 votes
      + -

    40 billion dollars because I don’t wanna be in the window washing business, I wanna work for you guys, and it would take 40 billion to do that instead of this.
    Next answer:
    The question is also very ambiguous, I can charge whatever I want, does this mean that I will get paid 40 billion if I charge it? If I was charging to wash every window in Seattle is it one time or ongoing, does it have to be spotless or just cleaner than it was before I started? Am I cleaning or am I allowed to contract it out? What is my time frame for completing the job. You can have 2 out of the following three: Speed, quality, and price.

  6. Submitted By: misan — November 20, 2007
    +29 votes
      + -

    It rains a lot in Seattle, you sure you want to clean the windows?

  7. Submitted By: Consultant — January 24, 2008
    -9 votes
      + -

    ((Time + Materials).40)1.15= Fee

    time = rack rate
    materials = squegees & windex
    .40 = discount rate
    1.15 = 15% travel expenses

  8. Submitted By: manoj — September 1, 2008
    +7 votes
      + -

    yeah, truly said by misan, It rains a lot in Seattle so nobody wants to wash a window,
    but don’t forget one things nobody said door-window
    it might be Microsoft windows ;)
    So I would not charge any thing to wash windows, even I will convince user that don’t wash windows, its a great o/s and every body loves it:)

  9. Submitted By: Todd Gardiner — September 10, 2008
    +9 votes
      + -

    This is a great question because of all of the things it does not ask:

    Is this a one-time contract, or an on-going service?
    Is this for all of the windows that currently exist, or will windows added while in the process (or on-going service) be part of the requirement?
    An I doing this by myself, or is this a bid for a team (or subcontractors)?

    As for the variables of the calculation:
    You have to include all residential and all commercial windows. Commercial buildings typically have more windows per floor than residential.
    Is water provided on site, or do I have to transport water to each building?
    For that matter, can we ask each window to be brought to a specific location, or, as expected, must the window washing happen on site?

    There are a lot of things that have to be known before you can even begin the process of estimation. In fact, if you can ask enough questions and receive answers (which is doubtful), you could even calculate an exact number without need for an estimation.

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