Monmouth County, NJ: flood zone, zoning and property lines by address
Free, no account. Or open the New Jersey map and tap a lot.
Towns in Monmouth County: Marlboro, Long Branch, Tinton Falls.
Flood zone by address
ParcelSheet reads FEMA's National Flood Hazard Layer at the lot: the zone, whether it is a high risk area where lenders ask for flood insurance, and the base flood elevation where FEMA lists one. FEMA's countywide study for Monmouth County has 123 FIRM panels, the newest effective June 2022; coastal V zones, where waves add to the flood, are mapped along its shore.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for a Monmouth house comes from a licensed surveyor and is often on file with the county or city building office.
Property lines
The parcel outline, parcel number and mapped size come from the New Jersey statewide parcel map (NJ Office of GIS cadastral layer with the MOD-IV tax list), so a Monmouth lot shows the same lines the municipal tax maps draw. Monmouth County covers about 299,650 acres of land and 123,645 acres of water.
Mapped lines are approximate. The Monmouth County Board of Taxation keeps the parcel record (Monmouth County website); every county's office is on the state's county boards of taxation list; a licensed surveyor sets the true corners.
Zoning
In New Jersey zoning is set by each municipality, not by the county: in Monmouth County, Long Branch, Tinton Falls each zone the land inside their limits. ParcelSheet shows the use code on the lot's parcel record and the municipality it sits in; the municipal zoning office has the district, the uses it allows and the lot size it needs. The Monmouth County website lists the county's municipalities.
ADU and guest houses
The New Jersey Municipal Land Use Law (N.J.S.A. 40:55D) lets each municipality allow an accessory dwelling unit on a lot with a house. Whether a Monmouth lot can add one depends on its district; the municipal zoning office has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Septic and soil
ParcelSheet reads the USDA soil survey at the lot: the soil's name, its septic absorption rating and whether it is prime farmland. Monmouth County is soil survey area NJ025, Monmouth County, New Jersey, last updated August 2026, on Web Soil Survey.
A new or changed septic system in Monmouth County needs a permit from the Monmouth County health department under the NJDEP septic rules (N.J.A.C. 7:9A), which tests the soil on the lot itself.
Setbacks
Setbacks in Monmouth County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the municipal zoning office gives them for the lot's district, and Long Branch and Tinton Falls for land inside their limits.
Hazards that apply
- Storm surge. Monmouth County has coastal V zones on its FEMA map, so storm surge reaches its shore. The county's evacuation zones are on its emergency management site; ParcelSheet shows the FEMA zone and the 3 ft sea level rise map at the lot.
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Monmouth lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Monmouth County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA's countywide flood map for Monmouth County has 123 panels, the newest effective June 2022. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Monmouth County?
Open the New Jersey map, type the address, and the parcel outline from the county Board of Taxation shows on the map with its parcel number and mapped size. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Monmouth County?
Zoning in Monmouth County is set by each municipality (such as Long Branch, Tinton Falls), not by the county. ParcelSheet shows the use code on the parcel record and names the municipality; the municipal zoning office has the final word.
Can I build an ADU in Monmouth County?
The New Jersey Municipal Land Use Law (N.J.S.A. 40:55D) lets each municipality allow an accessory dwelling unit, and each sets its own rules. In Monmouth County ask the municipal zoning office for the lot's district first; ParcelSheet shows the lot size as mapped so you can see the room you have.
Do I need a septic permit in Monmouth County?
Yes. A new or changed septic system in Monmouth County needs a permit from the Monmouth County health department under the NJDEP septic rules (N.J.A.C. 7:9A). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area NJ025 (Monmouth County, New Jersey).
Next to Monmouth County: Burlington County, Mercer County, Middlesex County, Ocean County.
The New Jersey map · All New Jersey counties · Flood zones explained · FIRM panels and LOMAs · All 50 states