St. Louis County, Missouri
Village of Marlborough is a village in St. Louis County, Missouri. Village of Marlborough adopts its own zoning, so inside its limits Village of Marlborough’s rules apply, not the county’s. 5 rules below are quoted from official sources and independently re-checked, most recently on October 23, 2026. Rules for unincorporated land are on the St. Louis County page.
Land inside Marlborough village limits (not the unincorporated county area): Marlborough village adopts and administers its own zoning ordinance, Chapter 405 Zoning Regulations.
“chapter 405 zoning regulations (section 405.010 – section 405.360)”
Land inside Marlborough village limits: the village zoning code (Chapter 405) names four districts. Section 405.020 lists no agricultural or rural-residential district, so none exists in the code.
“the village is hereby divided into districts of which there shall be four (4) known as: 1. "r-1" single-family residential district 2. "r-2" multiple-family residential district 3. "c-1" commercial district 4. "c-2" higher intensity commercial district.”
Family dwellings in the R-1 single-family residential district inside Marlborough village. The code's only other residential district, R-2, is multiple-family and is not covered here; the code has no agricultural or rural-residential district.
minimum lot area per family dwelling: >= 5000 square feet · minimum average lot width at the building line: >= 50 feet
“every family dwelling hereafter erected or structurally altered in the "r-1" residential district shall provide a lot area of not less than five thousand (5,000) square feet and no lot shall have an average width at the building line of less than fifty (50) feet.”
Buildings and structures on lots in the R-1 single-family residential district inside Marlborough village. R-2 and commercial setbacks are not covered here.
front yard setback: 15 feet (or average front lot line of lots within 200 feet on same side of street, whichever is less) · rear yard setback: 5 feet · side yard setback: 5 feet
“2. front and rear yards. in the "r-1" residential district, no building or structure shall be erected or structurally altered within: front fifteen (15) feet or the average front lot line of all lots within two hundred (200) feet and on the same side of the street, whichever is less. rear five (5) feet side five (5) feet in the case of a corner lot, no building or structure shall be erected or structurally altered in the front or rear yard within fifteen (15) feet of the street side lot line.”
Buildings in the R-1 single-family residential district inside Marlborough village. Commercial and multiple-family district heights are not covered here.
maximum height, residence: <= 35 feet (not more than two and one-half (2½) stories) · maximum height, other buildings: <= 18 feet (may increase 1 foot for each 2 feet of setback from the applicable building line, to a maximum of 35 feet)
“no residence shall be erected or structurally altered to exceed two and one-half (2½) stories or thirty-five (35) feet in height and no other building shall be erected or structurally altered to exceed eighteen (18) feet in height from ground level except that such maximum height of other buildings may be increased an additional one (1) foot for each two (2) feet of setback from the applicable building line with a maximum height of thirty-five (35) feet for any building.”
We looked and could not find an official answer yet. Silence is not permission; ask Village of Marlborough or St. Louis 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 Village of Marlborough publishes no rule on the point, not that none exists. St. Louis County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Village of Marlborough means bringing your own water and power. The kit we’d start with:
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