Lewis and Clark County, Montana
East Helena is a city in Lewis and Clark County, Montana. East Helena adopts its own zoning, so inside its limits East Helena’s rules apply, not the county’s. 8 rules below are quoted from official sources and independently re-checked, most recently on October 23, 2026. Rules for unincorporated land are on the Lewis and Clark County page.
All land inside East Helena city limits
“in 2009 non-interim zoning was approved and adopted by the east helena city council.”
Residential zoning district (Zoning Ordinance section 3.2.03), single-household and two-household dwellings inside East Helena city limits
minimum lot area, single-household and two-household dwelling: >= 7500 square feet (townhouse configuration and three-or-more-dwelling rules listed in conditions)
“b. lot area. these lot areas are cumulative, and these minimums assume a lack of development constraints. 1. single-household and two-household dwelling shall have a minimum lot area of 7,500 square feet. 2. two-household dwelling in an attached single-household townhouse configuration shall have a minimum lot area of 3,500 square feet per lot. 3. three- or more dwellings shall have a minimum lot area of 3,500 square feet per dwelling unit.”
Residential zoning district (Zoning Ordinance section 3.2.03), single-household and two-household dwellings inside East Helena city limits
front yard setback, local street: 15 feet · front yard setback, arterial street: 25 feet · rear yard setback: 15 feet · side yard setback, interior lot line: 10 feet · side yard setback, adjacent to street right-of-way: 5 feet
“d. yards. 1. front yard setback: a. adjacent to arterial streets as designated in the east helena growth policy - 25 feet b. adjacent to local streets - 15 feet c. in neighborhoods that were created before 2016 the front setback may be in line with existing structures on adjacent lots. 2. rear yard setback: d. 15 feet 3. side yard setback: e. 10 feet along interior lot lines and 5 feet adjacent to street rights-of-way. f. 0 feet for interior walls of townhouses”
Residential zoning district (Zoning Ordinance section 3.2.03), single-household and two-household dwellings inside East Helena city limits
maximum lot coverage by principal and accessory buildings: <= 40 percent of lot area
“a. lot coverage. 1. maximum lot coverage by principal and accessory buildings shall be not more than 40 percent of the lot area.”
Residential zoning district (Zoning Ordinance section 3.2.03), single-household and two-household dwellings inside East Helena city limits
maximum building height: <= 30 feet
“e. building height. 1. maximum building height shall be 30 feet.”
Division of land inside East Helena city limits
“documents such as the city’s growth policy and subdivision regulations are reviewed and updated by the city’s planning board”
Zoning and development applications inside East Helena city limits
“the east helena zoning regulations, which includes the zoning ordinance and zoning maps, as well as the various types of zoning applications and fee schedule are available below.”
Zoning development review applications submitted to East Helena City Hall
“the completed development review application should be submitted with all associated drawings and documentation to city hall with the applicable fee.”
We looked and could not find an official answer yet. Silence is not permission; ask East Helena or Lewis and Clark County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that East Helena publishes no rule on the point, not that none exists. Lewis and Clark County’s page lists the county offices to call.
Off-grid gear
Going off-grid in East Helena means bringing your own water and power. The kit we’d start with:
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