Rating Newest Oldest. Best Answer: An REO can take 2 to 3 weeks for an all cash offer, 4 to 5 weeks if funding is required. I usually ask for closing in 45 days as I know the system is swamped and don't want to have to get extensions all the time. We've been closing from 28 to 35 days on REO's. Short Sales can take from 2-3 months to 4 months or so and then can be cancelled by a variety of issues at the last minute. Regular sales can be done in about 30 + days depending on the area of the country it's done in. Source(s): Licensed REALTOR.