It is all very subjective. A house that is priced well, in good condition and has charm along with a lot of sunlight plus level usable land and a scenic location will usually sell fairly quickly, anywhere from 1 or 2 weeks to 1 or 2 months.
If you're asking what time of year is best when selling, typically March-May is the busiest time of year and therefore the best time to sell.
If you have any more questions, just give me a call at 707-836-3445
Visit my website at http://www.sonomacountyhomepro.com