St. Charles County, Missouri
St. Paul is a city in St. Charles County, Missouri. St. Paul adopts its own zoning, so inside its limits St. Paul’s rules apply, not the county’s. 19 rules below are quoted from official sources and independently re-checked, most recently on November 5, 2026. Rules for unincorporated land are on the St. Charles County page.
Erection, construction, reconstruction, conversion, alteration, enlargement, extension, razing, or moving of a building or structure inside St. Paul city limits.
“It shall be unlawful to commence or to proceed with the erection, construction, reconstruction, conversion, alteration, enlargement, extension, razing, or moving of any building or structure”
Building-permit and zoning-enforcement activity inside St. Paul city limits.
“All building inspections will be performed by Choinka Municipal Services, with checks payable to the city of St. Paul.”
Land inside St. Paul city limits.
“The purpose of this ordinance is to regulate and control the zoning of land and consequent use of said land within the City of St. Paul”
Zoning districts inside St. Paul city limits.
districts: R-1A; R-1B; OT; C-1; I-1; AG; P-R; T-G
“R-1A Single Family Residential District R-1B Single Family Residential District OT Old Town District”
Single-family dwellings in the R-1A Single Family Residential District.
ranch-style-minimum: 1700 square feet (Unless approved by a PUD.) · one-and-one-half-story-minimum: 2000 square feet (Unless approved by a PUD.) · two-story-minimum: 2200 square feet (Minimum first floor is 1,300 square feet; unless approved by a PUD.)
“The minimum dwelling size shall be as follows, unless approved by a PUD”
“The minimum dwelling size shall be as follows, unless approved by a PUD”
Single-family dwellings in the R-1A Single Family Residential District.
minimum-lot-area: 3 acres (Single-family dwellings.)
“Single Family Dwellings shall be located on lots containing a minimum area of 3 acres.”
“Single Family Dwellings shall be located on lots containing a minimum area of 1 acre.”
Single-family dwellings in the R-1A Single Family Residential District.
front-yard: >= 75 feet (Measured from centerline of road.) · side-yard: >= 30 feet · rear-yard: >= 50 feet
“Front Yard: not less then seventy-five (75) feet (from centerline of road).”
“Front Yard: not less than sixty-five (65) feet from centerline of roadway.”
R-1A Single Family Residential District.
maximum-building-or-structure-coverage: <= 30 percent of lot area
“The maximum lot coverage by buildings or structures shall not exceed thirty (30) percent of the lot area.”
“The maximum lot coverage by buildings or structures shall not exceed thirty (30) percent of the lot area.”
Buildings and structures in the R-1A Single Family Residential District.
maximum-building-height: <= 35 feet (Two and one-half stories maximum.)
“No building or structure shall exceed a height of two and one-half (2 ½) stories, or thirty-five (35) feet.”
“No building or structure shall exceed a height of two and one-half (2 ½) stories, or thirty-five (35) feet.”
A mobile home used as a temporary residential or non-residential structure after a disaster inside St. Paul city limits.
temporary-placement-period: 6 months (Mayor may extend six additional months upon good cause.) · minimum-site-size: 3 acres (Temporary disaster mobile home.)
“Such mobile home shall be removed from its location within six (6) months after its original placement.”
Single-family dwelling development in the R-1B Single Family Residential District inside St. Paul city limits.
“Public sewer is required [...] Public water is required”
Subdivision of land in the Old Town District inside St. Paul city limits.
minimum-tract-before-subdivision: > 3 acres (Old Town District.) · minimum-lot-size-after-subdivision: >= 1 acre (Old Town District.)
“No tract of land within this district shall be subdivided, unless said tract of land is greater than three (3) acres.”
Residential lots less than five acres in the R-1A and R-1B districts inside St. Paul city limits.
lot-size-threshold: < 5 acres (Residential lots.)
“All lots less than five (5) acres used for residential purposes shall have a paved driveway”
Building-permit applications inside St. Paul city limits.
“applications for permits are handled by Choinka Municipal Services. Please send applications to Choinka Municipal Services.”
We looked and could not find an official answer yet. Silence is not permission; ask St. Paul or St. Charles 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 St. Paul publishes no rule on the point, not that none exists. St. Charles County’s page lists the county offices to call.
Off-grid gear
Going off-grid in St. Paul means bringing your own water and power. The kit we’d start with:
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
← All of St. Charles County: county rules, score and offices