Zoning, building permits and septic rules in Shrewsbury, Missouri
Shrewsbury is a city in St. Louis County, Missouri. Shrewsbury adopts its own zoning, so inside its limits Shrewsbury’s rules apply, not the county’s. 7 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 Shrewsbury
Shrewsbury’s own rules
Building code adoptedAdopted (with conditions)
New construction and existing buildings inside Shrewsbury city limits
Adopted edition as printed on the eCode360 page is the International Building Code, 2006 edition, including appendix chapters A, B, D, E, F, G, H, I and J.
Also referenced in the same section: 2006 International Residential Code, 2006 International Existing Building Code, International Property Maintenance Code 2006 and 2006 International Energy Conservation Code; 2005 National Electric Code adopted as the electrical code; 2006 International Fire Code referenced to the prescribed extent.
Section 500.010(b) defines the building official as the building commissioner.
The adoption history on the page shows several ordinances, the latest dated 10-25-2008; the page was not checked for a newer edition adopted after that, so whether the 2006 edition is still the current edition is unconfirmed.
“is hereby adopted as the building code of the city of shrewsbury in the state of missouri for regulating and governing the conditions and maintenance of all property, buildings and structures as hereby provided”
Local zoningPresent (with conditions)
Land inside Shrewsbury city limits (St. Louis County, Missouri) under the city's own zoning ordinance, Code chapter 410 (zoning districts) and chapter 405 (zoning rules and regulations)
The city's zoning chapters govern use and dimensional limits inside city limits only; they do not govern unincorporated St. Louis County land.
Chapter 405 and chapter 400 text was listed in the eCode360 table of contents but was not opened in this research pass.
“chapter 405 zoning rules and regulations (section 405.010”
Zoning districtsPublished (with conditions)
Zoning districts of Shrewsbury city, St. Louis County, Missouri
Chapter 410 sets out the city's zoning districts, including R-1, R-2, R-3, C-1, C-2 and M-2 district sections as listed in the code index; the zoning map itself was not opened.
“chapter 410: zoning districts - city of shrewsbury, mo”
Minimum lot sizeSpecified
Single-family detached dwelling lots in the R-1 single-family district inside Shrewsbury city limits
Corner lots must be at least 90 feet wide, per the R-1 width provision.
Lots on curved streets are measured at the building line for width.
The R-1 area clause contains an exception for lots of smaller area whose plat was recorded before the ordinance; the full exception text was not captured, so it is not applied here.
Only the R-1 district was researched; the R-2 district (section 410.020) has a 7,500 square foot minimum and is not covered by this claim.
minimum lot area: >= 10000 square feet (smaller recorded plats excepted (exception text not fully captured)) · minimum lot width at street line: >= 75 feet (corner lots 90 feet; curved-street lots measured at building line)
“every lot shall have an area of not less than ten thousand (10,000) square feet”
SetbacksSpecified
Principal buildings in the R-1 single-family district inside Shrewsbury city limits
Side-yard driveways are permitted within the side yard only if that side yard is at least 10 feet wide.
Only the R-1 district was researched. The R-2 district (section 410.020) has a 30-foot front yard, a side yard of 10 percent of lot width, and a 25-foot rear yard, and is not covered here.
No accessory-structure setbacks were read in this pass.
front yard setback: >= 35 feet · side yard setback: >= 8 feet (driveways may be built within the side yard only if the side yard is at least 10 feet wide) · rear yard setback: >= 30 feet
“there shall be a front yard having a depth of not less than thirty-five (35) feet.”
Building heightSpecified
Buildings in the R-1 single-family district inside Shrewsbury city limits
Height rule is stated as 'except as may be otherwise provided herein'; the captured R-1 text does not show a separate exception.
maximum building height: <= 35 feet (except as may be otherwise provided herein) · maximum stories: <= 2.5 stories
“c. height regulations. no building shall exceed thirty-five (35) feet in height nor contain more than two and one-half (2½) stories”
Subdividing landRegulated (with conditions)
Division of land inside Shrewsbury city limits
Chapter 435 subdivision regulations exist in the city code; its content was not opened, so approval steps and standards are unverified.
Chapter 445 (storm water management, grading and erosion) also appears in the table of contents and was not opened.
We looked and could not find an official answer yet. Silence is not permission; ask Shrewsbury or St. Louis County directly.
Building permit — New residential construction inside Shrewsbury city limits
Owner-builder exemption — Owner-builder construction of a home inside Shrewsbury city limits
Inspections — Inspections of new residential construction inside Shrewsbury city limits
Certificate of occupancy — Occupancy of a new home inside Shrewsbury city limits
Minimum dwelling size — Minimum dwelling floor area in the R-1 district inside Shrewsbury city limits
17 more unanswered
Lot coverage
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
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 Shrewsbury 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 Shrewsbury means bringing your own water and power. The kit we’d start with:
