The answer to that depends on the type of auxillary square footage you are referring to. For example, the most common auxillary footage is in the garage or carport. It may be ery important to you to have a 2 car versus a 1 car or no garage in which case that auxillary footage becomes more important. Car storage is also somewhat important for resale.
Ultimately though your offer price while taking other comps into consideration should also be based on how right the home is for you and your family. Does the floorplan work? Is it in the perfect location? How's the condition? Your realtor should be able to help you navigate through these questions so your offer will be the right balance and hopefully get accepted.
Let me know if you have any other questions!
Good Luck! - Sun Jun 1 2008, 06:19