I was scheduling showings this weekend for a couple of potential buyers. I selected the properties and called the showing service to set up times to show them. In this market, I'm always amazed by the showing restrictions. I was told the seller requires a 48-hour notice and a 30-minute showing window for all appointments and the home is vacant! I passed on showing it.
As a heavy listing agent (75+ per year), I understand there are times when restrictions are necessary due to special circumstances such as a baby, home schooling, elderly or sick occupants, etc.
However, if a seller makes the home too difficult to show, busy agents will pass it up. If you have to have notice, ask your agent to put the restriction and reason in the private remarks section of MLS. Most of us are very understanding and will try to accommodate the need for advance notice.
Try not to reduce the showing window to less than 2 hours. The amount of time a buyer spends in a property varies with their interest. If your home is the fifth showing of the day, it is very difficult to plan on a 30-minute window.
Buyers need to understand that it's not always possible to show a home at the last minute as well. Routes need to be set up and showings scheduled in advance.
A little planning and courtesy can go a long way for both parties!