What zoning does
Zoning is a set of local laws that divide a municipality into districts and regulate how land and buildings within each district may be used. The rules typically cover what activities are allowed, how large buildings can be, how far they must sit from property lines and how much parking is needed. The goals traditionally given for zoning include separating incompatible uses, managing density and protecting property values, though critics note that zoning has also been used to exclude certain people and housing types.
Zoning is one of the main tools of planning, and it is the one with the most direct effect on individual property owners. In New Jersey, municipalities exercise zoning power under the state’s Municipal Land Use Law, and the rules are adopted as an ordinance by the local governing body, such as a city council.
Two parts: the map and the text
A zoning ordinance has two parts that work together.
- The zoning map shows which district each parcel belongs to, usually with names or letter codes such as residential, commercial or industrial districts. The labels differ from town to town.
- The ordinance text explains what each district allows and sets the standards for it.
To find out how a particular property is zoned, a resident can look at the municipal zoning map, typically available online or from the planning or zoning office, and then read the section covering that district.
Common district types
Names vary, but most municipalities have some version of these categories:
- Residential districts, which range from low-density single-family areas to higher-density areas with rowhouses or apartment buildings.
- Commercial districts, which may allow shops, offices and restaurants, from small neighborhood corridors to larger centers.
- Industrial districts, intended for manufacturing, warehousing and similar activities.
- Mixed-use districts, which combine homes with shops or offices in the same area or building.
- Open space or institutional districts, covering parks, schools and civic uses.
- Overlay districts, which add extra rules on top of the base district, for example for a historic area or a waterfront.
Many older cities have zoning that was drafted for a different era. Districts that were once industrial may now sit beside homes, and updates are sometimes needed to match current plans. The relationship between long-range plans and zoning is discussed in the article on master plans.
Permitted, conditional and prohibited uses
Within a district, each use generally falls into one of a few categories.
- Permitted uses are allowed as of right, which means that an applicant who meets the standards does not need special approval beyond ordinary permits.
- Conditional uses are allowed if specific listed conditions are met, and typically require approval from a land-use board.
- Prohibited uses are not allowed in that district. In many ordinances, anything not expressly permitted is prohibited.
In addition, existing buildings or uses that predate a rule may continue as “nonconforming” uses under limits set by the ordinance.
Dimensional standards
Beyond use, zoning controls the shape of development. Common standards include:
- Setbacks: the minimum distance between a building and the property line.
- Lot size and width: minimum dimensions for a parcel.
- Height limits: the maximum building height, expressed in feet or stories.
- Lot coverage: the share of a lot that can be covered by buildings or pavement.
- Floor area ratio: the relationship between a building’s total floor area and the lot size.
- Parking requirements: the number of spaces required for a given use.
These numbers differ across districts and municipalities, so no single set applies everywhere.
Variances and other approvals
Sometimes a proposal does not fit the rules, and the law provides a process for exceptions. In New Jersey, local land-use boards handle these.
Planning board. Reviews subdivisions (dividing land), site plans (how a development is laid out) and, in many cases, conditional uses. It also prepares the master plan.
Zoning board of adjustment. Hears requests for variances and certain other approvals.
Variances come in two broad types:
- A bulk or dimensional variance (sometimes called a “c” variance) relaxes a standard such as a setback or height limit, typically where strict application would cause hardship due to the property’s particular features, or where the benefits of the deviation outweigh the detriments.
- A use variance (sometimes called a “d” variance) permits a use not otherwise allowed in the district. The legal test is stricter, and the applicant must show “special reasons” and that the proposal can be granted without substantial harm to the public good or the zone plan. In New Jersey, a use variance requires a supermajority vote of the board.
The exact procedures, thresholds and tests are set by statute and case law and should be confirmed with official sources or a qualified professional.
Rezoning
If many properties need different rules, or if the municipality wants a different outcome for an area, the governing body can amend the zoning ordinance or the map. This is a legislative act, and it involves public notice and a hearing, with the planning board typically reviewing the proposed change for consistency with the master plan. Rezoning is often the way a city implements a new vision for a neighborhood or former industrial area. It changes what may be built, but does not itself cause building to occur.
Who can take part
Zoning decisions are made in public, and residents can attend hearings and offer comments. Neighbors within a certain distance of a property are typically notified of certain applications. Practical advice for attending hearings is in the article on public meetings, and broader routes for involvement are in the one on community participation.
Criticism and debate
Zoning is a subject of active debate. Supporters say it provides predictability and protects residential areas from nuisances. Critics argue that restrictive rules can limit housing supply and raise costs, that parking minimums can waste land, and that historically zoning contributed to segregation. Related issues of housing access are part of the discussion of redlining history. Reforms in various places have included allowing more housing types, reducing parking requirements and creating mixed-use districts, with results that are still debated.
Checking the rules for a specific property
Because ordinances are amended and details differ, anyone with a real question about a property should consult the municipal zoning officer and read the current ordinance. This article is general information and not legal advice.