Environmental Rules in Montgomery County, VA (2026)
4 rules for unincorporated Montgomery County, Virginia.
Verified from official government sources
Stormwater Management
Montgomery County runs its own Virginia Erosion and Stormwater Management Program, and no one may disturb land until the county issues land-disturbance approval. Projects disturbing 10,000 square feet or more must meet the state's technical erosion-control criteria.
Stormwater Rules in Montgomery County, VA
Significant RestrictionsMontgomery County Code §§ 8-73, 8-76
(1) Land-disturbing activity that disturbs 10,000 square feet or more, is less than one acre and not part of a common plan of development or sale, is subject to the soil erosion and sediment control criteria, techniques, and methods defined in Article 2 (9VAC25-875-540 et seq.) of Part V of the Virginia Erosion and Stormwater Management Regulation (Regulation). ... Except as provided herein, no...
Erosion Control
Montgomery County's Erosion and Stormwater Management Ordinance requires an approved erosion control and stormwater plan and a land-disturbance approval before regulated land-disturbing activity outside Blacksburg and Christiansburg. The threshold starts at 10,000 square feet of disturbed land, and violations carry county civil penalties up to $32,500 per day.
Montgomery County VA Erosion & Stormwater Control
Significant RestrictionsMontgomery County Code §§ 8-70, 8-73
(a) This ordinance shall be known as the Erosion and Stormwater Management Ordinance of Montgomery County. Pursuant to Virginia Code §62.1-44.15:27, this ordinance is adopted as part of an initiative to integrate Montgomery County's stormwater requirements with Montgomery County erosion and sediment control, into a consolidated erosion and stormwater management program. ... (1) Land-disturbing ...
Flood Zones
In Montgomery County outside Blacksburg and Christiansburg, the zoning ordinance's Flood Damage Prevention Overlay divides FEMA-mapped land into four districts, Floodway, Special Floodplain, Approximated Floodplain and Shallow Flooding, and requires a zoning permit before any development occurs inside any of them.
Montgomery County VA Floodplain Districts
Some RestrictionsMontgomery County Code § 10-37, Art. II § 2.1
The Floodway District is delineated, for purposes of this section, using the criterion that certain areas within the floodplain must be capable of carrying the waters of the one hundred (100)-year flood without increasing the water surface elevation of that flood more than one (1) foot at any point. ... The Special Floodplain District shall be those areas identified as an AE Zone on the maps ac...
Flood Elevation Requirements
In Montgomery County outside Blacksburg and Christiansburg, new or substantially improved buildings in a mapped special flood hazard area must have their lowest floor, basement included, set at least one foot above the base flood elevation; commercial and industrial buildings may floodproof to that level instead of elevating, with an engineer's certification.
Montgomery County VA Base Flood Elevation Freeboard
Some RestrictionsMontgomery County Code § 10-37, Art. III § 3.3
Residential Construction. New construction or substantial improvement of any residential structure (including manufactured homes) shall have the lowest floor, including basement, elevated no lower than one (1) foot above the base flood elevation. ... Nonresidential construction. New construction or substantial improvement of any commercial, industrial, or nonresidential building (or manufacture...
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