If you live in a subdivision that has covenants and restrictions you may be severely limited in what you can build even if the jurisdictions approve your plans and issue you a building permit.
Many areas have limitations on what you can build and do on your property. So check with your local home owner’s association or go to the county assessor’s office and get a copy of the covenants and restrictions recorded on your deed.
This will tell you what the limits are. It may be you must build a home of a certain size or can only use certain types of exterior finishes such as brick or cedar siding.