FEMA flood zone rules in Montgomery County, MD — also called floodplain regulations or special flood hazard area (SFHA) rules — determine flood insurance requirements and elevation standards for new construction.
Montgomery County participates in FEMA's NFIP. County Code Chapter 19 and COMCOR §19.45.01.03 regulate floodplain development. Floodplain District Permits required for most land-disturbing activities within 100-year floodplain (30-acre drainage area or greater). New FEMA flood maps effective Spring 2026 following January 2025 appeal period.
Montgomery County's Floodplain District (Chapter 19) requires permits for construction, land disturbance, or placement of structures within the 100-year floodplain. A floodplain district includes any area subject to inundation in a 100-year storm and waterways with drainage area 30 acres or more. FIRM maps are used for delineation. Minor disturbance under 5,000 sq ft that is promptly stabilized may be exempt. State MDE setback rules require 100-foot setback from FEMA-mapped watercourses and 50 feet from unmapped streams. Lowest floor of new structures must be 1 foot above the 100-year flood level. Structures sustaining 50%+ damage must meet current floodplain requirements. New FEMA flood maps are in the appeal process with Spring 2026 effective date.
Construction below flood elevation: retroactive compliance required, fines $500 to $5,000. Floodway encroachment: removal order. Failure to maintain flood insurance: lender force-placement at higher cost.
Montgomery County, MD
Montgomery County Code §31-14 prohibits parking heavy commercial vehicles (over 10,000 lbs, 21+ ft, 8+ ft high) on public residential roadways. One light com...
Montgomery County, MD
Abandoned vehicles in Montgomery County are subject to state and county law. MD Transportation Code §25-201+ defines abandonment; county can tag and tow vehi...
Montgomery County, MD
Maryland has no shared fence cost statute. Each owner responsible for their own fence. Spite fence provision under MD RP Art. §14-120.
Montgomery County, MD
Montgomery County prohibits barbed wire, razor wire, and electric fences in residential zones under Ch 59. HOAs commonly restrict chain-link fencing. Approve...
Montgomery County, MD
Maryland’s Tracey’s Law (2014) treats all dog breeds equally under negligence standard. No breed-specific strict liability. Dangerous dogs behavior-based.
Montgomery County, MD
Montgomery County requires dogs on leash in public. Off-leash in designated parks only. Rabies vaccination required statewide. MD Criminal Law §10-619 covers...
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