Falls Church city, VA zoning map, flood zone and property lines by address
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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 has 11 FIRM panels covering Falls Church city, the newest effective June 2024; 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 Falls Church 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 Virginia statewide parcel layer (Virginia Geographic Information Network, from each locality), so a Falls Church lot shows the same lines the real estate assessor draws. Falls Church city covers about 1,310 acres of land.
Mapped lines are approximate. The Falls Church city real estate assessor keeps the parcel record (Falls Church city website); a licensed surveyor sets the true corners.
Zoning
In Falls Church city zoning is set by the city itself, an independent city outside any county. ParcelSheet shows the use code on the lot's parcel record and the municipality it sits in; the city planning office has the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Virginia's zoning law (Code of Virginia Title 15.2, Chapter 22), the city itself, an independent city outside any county can allow an accessory dwelling unit on a lot with a house. Whether a Falls Church lot can add one depends on its district; the city planning 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. Falls Church city is soil survey area VA610, Falls Church City, Virginia, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Falls Church city needs a permit from the Falls Church city local health department (Virginia Department of Health).
Setbacks
Setbacks in Falls Church city come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the city planning office gives them for the lot's district.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Falls Church lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Falls Church city?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA has 11 flood map panels covering Falls Church city, the newest effective June 2024. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Falls Church city?
Open the Virginia map, type the address, and the parcel outline from the Falls Church city real estate assessor 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 Falls Church city?
Zoning in Falls Church city is set by the city itself, an independent city outside any county. ParcelSheet shows the use code on the parcel record and names the municipality; the city planning office has the final word.
Can I build an ADU in Falls Church city?
Under Virginia's zoning law (Code of Virginia Title 15.2, Chapter 22), the city itself, an independent city outside any county can allow an accessory dwelling unit, and each sets its own rules. In Falls Church city ask the city planning 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 Falls Church city?
Yes. A new or changed septic system in Falls Church city needs a permit from the Falls Church city local health department (Virginia Department of Health). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area VA610 (Falls Church City, Virginia).
What can I build on 5 acres in Falls Church city?
Zoning in Falls Church city is set by the city itself, an independent city outside any county. 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 city planning office has the district and its rules. See the Falls Church city website.
What are the residential setbacks in Falls Church city (2026)?
Setbacks in Falls Church city 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 city planning office gives them for the district. See the Falls Church city website.
Next to Falls Church city: Fairfax County.
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