Modern families have found that long commutes are seldom good when it comes to spending time with their loved ones, so some people compromise by working at home several days per week. There are those who have been lucky enough to find work from home employment, but they might be hard pressed when it comes to carving out office space. For them, sharing space with the formal dining room or a small nook in a bedroom is an answer that will work for a short time.
Building additional office space might seem extreme, but good planning will enable it to be converted to other uses in the future. If they already have a garage on the property, expanding the attic space might offer the perfect compromise for their needs. They can use it as an office outside the home, but they can convert it to storage or a recreation room once they have moved on to other employment.