Zoning, building permits and septic rules in Greendale, Missouri
Greendale is a city in St. Louis County, Missouri. Greendale adopts its own zoning, so inside its limits Greendale’s rules apply, not the county’s. 3 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.
Answers from the rulebook for Greendale
Greendale’s own rules
Local zoningPresent (with conditions)
Land inside Greendale city limits (City of Greendale, St. Louis County, Missouri). The city's own Chapter 405 Zoning Regulations apply; this is not the county's unincorporated area.
Zoning districts, use rules and dimensional limits are in Chapter 405 Article II and later articles; this claim records only that the city adopts and administers zoning.
The code page states it includes legislation through 03-17-2026 per the table of contents; the page does not give a single effective date for the zoning chapter.
“for the purposes of this chapter, the city of greendale, st. louis county, missouri, is hereby divided into districts of which there shall be four (4) in number as follows:”
Zoning districtsPublished (with conditions)
Zoning districts inside Greendale city limits, per Chapter 405 Article II.
Article II designates four districts: (1) residential or single-family dwelling district, (2) local business district, (3) cemetery district, (4) park district.
The single-family district is divided into subdistricts, including section 405.081 residential subdistrict "r-1", section 405.082 "r-2", section 405.084 "r-3" and section 405.085 "r-4".
District boundaries are shown on the district maps adopted by section 405.050; the map itself was not opened.
“1. residential or single-family dwelling district. 2. local business district. 3. cemetery district. 4. park district.”
Subdividing landRegulated (with conditions)
Land divisions inside Greendale city limits under Chapter 425 Subdivision Regulations.
Chapter 425 runs section 425.010 through section 425.460; the approval steps, plat requirements and exemptions were not opened.
Lot splits and boundary adjustments are reviewed against the zoning code (per Chapter 425 cross-references seen in search snippets, not opened).
We looked and could not find an official answer yet. Silence is not permission; ask Greendale or St. Louis County directly.
Building permit — Building permits for construction inside Greendale city limits
Owner-builder exemption — Owner-builder exemption inside Greendale city limits
Building code adopted — Building code inside Greendale city limits
Inspections — Building inspections for construction inside Greendale city limits
Certificate of occupancy — Certificate of occupancy for new homes inside Greendale city limits
22 more unanswered
Minimum dwelling size
Minimum lot size
Setbacks
Lot coverage
Building height
Living in an RV
Camping on your land
Tiny homes
Manufactured homes
Accessory dwellings
Who permits septic
Septic permit
Septic inspection
Off-grid sanitation
Well permit
Mandatory utility hookup
Agricultural exemption
Driveway access
Building in a floodplain
Short-term rentals
Permit fees
Permit process
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 Greendale 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 Greendale means bringing your own water and power. The kit we’d start with:
