Adding a bedroom and bath to a rehab

[Roland Brown]

When looking for deals I am seeing a lot of homes that are quite small on large lots. These homes are 2 bed/1 bath and 3 bed/ 1 bath, built in the late 50s and 60s. As a general rule is it a good idea/ bad idea to build onto the home an additional bedroom and bathroom? I just don't think the 2 bed/1 bath or the 3 bed/ 1 baths sell very quick.