Lawrence County, PA zoning map, flood zone and property lines by address
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Towns in Lawrence County: New Castle, Ellwood City, Oakwood.
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 Lawrence County has 79 FIRM panels, the newest effective January 2012; no coastal V zones are mapped in it.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for a Lawrence 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 Pennsylvania county parcel layers (each county publishes its own), so a Lawrence lot shows the same lines the county assessment office draws. Lawrence County covers about 228,731 acres of land and 2,810 acres of water.
Mapped lines are approximate. The Lawrence County assessment office keeps the parcel record (Lawrence County website); a licensed surveyor sets the true corners.
Zoning
In Pennsylvania zoning is set by the township, borough or city, or the county where the municipality has no zoning of its own: in Lawrence County, New Castle, Ellwood City 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 township or borough zoning office has the district, the uses it allows and the lot size it needs. The Lawrence County website lists the county's municipalities.
ADU and guest houses
Under Pennsylvania Municipalities Planning Code (Act 247 of 1968, 53 P.S. 10101 and following), the township, borough or city, or the county where the municipality has no zoning of its own can allow an accessory dwelling unit on a lot with a house. Whether a Lawrence lot can add one depends on its district; the township or borough 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. Lawrence County is soil survey area PA073, Lawrence County, Pennsylvania, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Lawrence County needs a permit from the local agency's sewage enforcement officer (the township, borough, joint agency or county health department, under Pennsylvania DEP Act 537 rules).
Setbacks
Setbacks in Lawrence County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the township or borough zoning office gives them for the lot's district, and New Castle and Ellwood City for land inside their limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Lawrence lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Lawrence 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 Lawrence County has 79 panels, the newest effective January 2012. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Lawrence County?
Open the Pennsylvania map, type the address, and the parcel outline from the Lawrence County assessment office 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 Lawrence County?
Zoning in Lawrence County is set by the township, borough or city, or the county where the municipality has no zoning of its own (such as New Castle, Ellwood City). ParcelSheet shows the use code on the parcel record and names the municipality; the township or borough zoning office has the final word.
Can I build an ADU in Lawrence County?
Under Pennsylvania Municipalities Planning Code (Act 247 of 1968, 53 P.S. 10101 and following), the township, borough or city, or the county where the municipality has no zoning of its own can allow an accessory dwelling unit, and each sets its own rules. In Lawrence County ask the township or borough 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 Lawrence County?
Yes. A new or changed septic system in Lawrence County needs a permit from the local agency's sewage enforcement officer (the township, borough, joint agency or county health department, under Pennsylvania DEP Act 537 rules). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area PA073 (Lawrence County, Pennsylvania).
What can I build on 5 acres in Lawrence County?
Zoning in Lawrence County is set by the township, borough or city, or the county where the municipality has no zoning of its own (such as New Castle, Ellwood City). The zoning district decides the uses, how many homes and the smallest lot it allows on 5 acres. ParcelSheet shows the lot size as mapped and the use code on the parcel record; the township or borough zoning office has the district and its rules. See the Lawrence County website.
What are the residential setbacks in Lawrence County (2026)?
Setbacks in Lawrence County come from the zoning code of the municipality the lot sits in: the front, side and rear distances depend on the lot's district. ParcelSheet does not draw setback lines or give a number it did not read; the township or borough zoning office gives them for the district. See the Lawrence County website.
Next to Lawrence County: Beaver County, Butler County, Mercer County.
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