There are newer tracts of land where the parameters of building have been put in place to keep the value of the area in a state of steady growth, so it can be difficult to get permission for constructing a home on a smaller lot. Lifting restrictions of this type can take a great deal of work, but it can result in the ability to have a home in a prosperous area. For those attempting this type of project, preparedness for an uphill battle is often a necessity.
Zoning laws are how many communities control neighborhoods, and an exemption might be the best way to get a house built. Some people have found that older neighborhoods have odd lots that have been written into the regulations that will allow them to build smaller homes, so it can be a boon for those who take the time to read the fine print in community regulations.