Key Facts Ordinance Text Full Breakdown Violations FAQ Sources More in Portsmouth

Portsmouth, VA Environmental Rules: Flood Zones (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

FEMA flood zone rules in Portsmouth, VA, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Permit required: All floodplain development, §14.1-10(a)
Flood map basis: FIRM effective Aug. 3, 2015
Administered by: City floodplain administrator
Penalty: Class 1 misdemeanor, §14.1-4
RV limit in floodplain: Under 180 consecutive days

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in Portsmouth, VA.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up Portsmouth, VA on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

Any development within a Portsmouth floodplain district, including placing a manufactured home, requires a permit before work begins under City Code § 14.1-10(a). The floodplain administrator reviews every application for compliance with the state building code and city ordinances before approving.

All uses and development occurring within any floodplain district, including placement of manufactured homes, shall be undertaken only upon the issuance of the appropriate permit. Such development shall be undertaken only in strict compliance with the provisions of this chapter and with all other applicable codes and ordinances as amended, including the VA USBC and the City of Portsmouth development ordinances.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 65).

Full Breakdown

1-2). 1-10(a) requires the floodplain administrator to issue a permit, and applications must show compliance with the Virginia Uniform Statewide Building Code and all other city development ordinances. 1-10(b)). 1-1) cites Portsmouth's own tide data showing the city faces rising base flood elevations, potentially more than four feet over the next 100 years, from sea-level rise and subsidence, which is why the permit requirement reaches placement of manufactured homes and recreational vehicles as well as permanent construction; RVs may sit on a floodplain site for fewer than 180 consecutive days and must stay licensed and ready for highway use. 1-4, and the city can also declare a noncompliant structure a public nuisance or withhold a certificate of occupancy until the violation is corrected.

Violations & Fines

Developing or altering a structure in a mapped floodplain without the required permit, or ignoring a floodplain administrator's order, is a class 1 misdemeanor under § 14.1-4(a). The city can also pursue equitable relief, declare a noncompliant structure a public nuisance subject to abatement, and withhold certificates of occupancy or flood insurance eligibility from structures built in violation.

Frequently Asked Questions

Do I need a permit to add a shed in Portsmouth's floodplain?

Yes. Section 14.1-10(a) requires a permit for any development in a mapped floodplain district, defined broadly enough to include structural alterations like an added shed, not just new homes. Skip the permit and you're subject to a class 1 misdemeanor under § 14.1-4.

How does the city know if my property is in the floodplain?

Portsmouth uses the FEMA flood insurance rate map it adopted August 3, 2015, along with later revisions, under § 14.1-2. If your parcel falls in a mapped special flood hazard area, or the city otherwise deems it hazard-prone under the chapter, the permit requirement applies.

Can I keep an RV parked on floodplain land?

Only temporarily. Section 14.1-10(d) limits recreational vehicles in a floodplain district to fewer than 180 consecutive days, and the RV must remain fully licensed, on its wheels or jacking system, and connected only by quick-disconnect utilities, not permanently anchored.

What happens if I build in the floodplain without a permit?

You face a class 1 misdemeanor under § 14.1-4, and the city can separately declare the structure a public nuisance subject to abatement, plus withhold your certificate of occupancy or flood insurance eligibility until the violation is fixed.

Sources & Official References

[1]Portsmouth, VA Code of Ordinances, Ch. 14.1 (Municode)

Other rules in Portsmouth

Parking Rules: RV & Boat ParkingSome Restrictions Erosion ControlSome Restrictions Stormwater ManagementSome Restrictions Boat Dock PermitsSignificant Restrictions Flood Elevation RequirementsSome Restrictions Parking Rules: Driveway RulesSome Restrictions Parking Rules: EV ChargingLight Restrictions Fence Regulations: Retaining WallsSome Restrictions Fence Regulations: Fence Permit RequirementsSome Restrictions Fence Regulations: Material RestrictionsSignificant Restrictions

All Portsmouth rules

Compare Portsmouth to another location·View the Virginia environmental rules overview

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.