You could run into setback issues
if your planned deck approaches
your property line.

Setback Distances

Setback requirements mandate the number of feet between the building area and the property line. Setbacks are designed to provide adequate space between buildings for light, ventilation, access, and privacy. For example, a house usually needs to be 10 to 15 feet from the side property boundary. Setbacks for the front and rear generally are much greater and depend on the size of the lot.

The best way to determine the existing relationship of your house to the property boundaries is to check your home's survey plat. You should have received a copy of this document when you bought your house. If not, you can get a copy from your municipality. Then, check with zoning or building officials for the appropriate setback distances. You cannot build an addition -- or even a shed -- beyond the setback area unless you get a variance. Even worse, if you do build without a variance, you may be forced to remove the addition.

If you live in an area that is relatively dense, it will probably be more difficult to obtain a building permit for an addition because there is less room for building without encroaching on setbacks. In many older areas, houses are already built to the setback lines. In less-dense suburban areas, there may be more opportunity, particularly if your house is on a large lot. In most cases, adding to the rear of the house is the best option because this is likely to have the deepest setback and the least encroachment on your neighbors.