A residential property is any land and building used primarily as a dwelling, from a single-family home to a large apartment complex. Residential properties require R (Residential) zoning, which is the most common zoning classification in any municipality. Residential zoning comes in multiple sub-classifications that determine the type, density, and size of housing permitted on a given parcel.
Most jurisdictions have a hierarchy of residential zones that range from low-density single-family to high-density multi-family. Common classifications include single-family exclusive (R-1, RS, RE) which permits one detached house per lot, two-family residential (R-2) which additionally permits duplexes, medium-density residential (R-3) which permits small multi-family buildings such as triplexes and fourplexes, high-density residential (R-4, RM) which permits apartment buildings and larger multi-family complexes, and mixed residential which may combine housing types within a single zone.
The specific sub-classification of your property determines what types of residential development are permitted. A lot zoned R-1 can only have a single-family home. A lot zoned R-3 could have a single-family home, a duplex, or a small apartment building, depending on the lot size and dimensional requirements.
Regardless of the residential sub-classification, all residential zones impose dimensional requirements that shape what can be built on a lot. These include minimum lot size (the smallest lot that can support a dwelling), setbacks (minimum distances from property lines to the building), maximum lot coverage (the percentage of the lot that can be covered by buildings), maximum building height (typically 35 feet for residential zones), and minimum open space or landscaping requirements. These dimensional requirements vary by zone and directly affect the size and placement of any residential structure on the lot.
Residential zoning permits accessory uses that support the residential function, including detached garages and carports, storage sheds and workshops, swimming pools and decks, accessory dwelling units (where permitted), and home occupations (businesses run from the home under strict conditions). Each accessory use has its own setback, size, and placement requirements within the residential zone. The total coverage of all structures, including accessories, must remain within the lot coverage limits.
Owning residentially zoned property gives you the right to use it for residential purposes but does not grant unlimited development rights. You cannot build more dwelling units than the zone allows, operate commercial businesses beyond what home occupation provisions permit, or alter the property in ways that violate the dimensional requirements of the zone. Understanding your specific residential zoning classification and its requirements is the first step in any residential development or improvement project.
Start by confirming the zoning on your property. You can look up your property's zoning on ZoningPoint.com to identify the current classification and understand what residential sub-classification applies. Contact your local building and planning department to obtain the specific dimensional requirements for your lot. If you are planning new construction, an addition, or a change in the use of the property, verify that your plans comply with the zoning code before investing in design work.
It is important that you look up the specific zoning type for your parcel of land, because every jurisdiction has their own unique zoning and this is just a generalization.
