The colonoscopy procedure with biopsy usually takes 30 minutes to an hour. The preparation to clean out your colon will start the night before and require you to take medicine, sometimes all through the night, so that your colon will be clean and ready for the procedure.

If you mean the procedure, it takes about 20 min. but if you mean the result of the biopsy, it takes 2-5 days on average

It should take about a hour for the actual biopsy sample to be taken from your gastrointestinal tract. Expect to spend the whole day at your doctor's office.

Depends on your facility
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There are many factors that play into this type of procedure and how long it takes. It can take on average 15 to 30 minutes from start of anesthesia to finish.

Not sure that I understand your question, but most colon biopsies are done during a colonoscopy which usually takes 10-15 minutes to complete.

Colonoscopy with Biopsy can be up to 5 hours, depends on difficulty of colon anatomy.

It depends on how good of a prep you do, how facile the physician is and how tortuous your colon is. The only thing you control is the prep so make sure you follow those directions completely to make the procedure more effective. In general this procedure can take anywhere from 20 min to over an hour. You will be sedated so it will feel like no time at all for you.