Bolthole Index

Cass County, Missouri

Zoning, building permits and septic rules in Garden City, Missouri

Garden City, Missouri, in Cass County, zones its own land under a city zoning ordinance1. Building permit applications are handled through Garden City city hall, not the county2. In the main residential district, all dwellings must connect to the city's sanitary sewers3. Cass County's septic and building rules apply only outside city limits4.

At a glance

Zoning
Yes: Garden City has its own zoning ordinance1
Building permits
Application form is published by the city; the city's building code is unconfirmed2
Sewer
Dwellings in R-1 must connect to city sewer3
Minimum lot, R-1
8,400 square feet per family5
Minimum lot, agriculture district
10 acres per family6
Minimum home size, R-1
750 square feet7
Mobile and manufactured homes
Only in district R-48
Septic inside city limits
Not confirmed; ask city hall9

Who to call

Planning & zoning

Garden City City Hall (City Clerk)

City hall, the city clerk and the codes enforcement officer

(816) 862-8208

107 N 3rd St., Garden City, MO 64747

Zoning

Garden City Planning and Zoning Commission

Zoning matters inside Garden City; meets at city hall

Building permits

Garden City building permit application and zoning checklists

Building permit application, rezoning and plat checklists

Septic permits

Cass County Building Codes, Zoning & Environmental Health Department

Septic permits and building permits for unincorporated Cass County; the contact to ask about wastewater questions

816-380-8134

30508 S. W. Outer Road, Harrisonville, MO 64701

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

Going off-grid in Garden City means bringing your own water and power. The kit we’d start with:

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Does Garden City, MO have zoning, and what does it mean for lots, setbacks and homes?

Yes. Garden City adopted a zoning ordinance that governs how land is used, where buildings sit and yard and height dimensions inside the city1. The city is divided into districts including agriculture (A), residential districts R-1 through R-4, commercial districts and industrial districts10. Dimensions depend on the district:

  • R-1 (single-family): at least 8,400 square feet per family5, a front yard of at least 25 feet and a rear yard of at least 25 feet11, a height limit of 35 feet and 2.5 stories12, and a dwelling of at least 750 square feet, not counting basements, porches or garages7.
  • Agriculture district A: at least 10 acres per family6, with front and rear yards of at least 30 feet and side yards of at least 15 feet13.

Mobile and manufactured homes are allowed only in district R-48. Zoning district maps are kept on file with the city clerk10. The Garden City zoning ordinance may include other limits we did not confirm, such as lot coverage and rules for RVs or tiny homes; ask city hall before you buy9.

Do you need a building permit in Garden City, and who issues it?

Garden City publishes a building permit application on its own website, so building permits for work inside city limits start with city hall rather than the Cass County Building Codes department2. The city's contact page lists a codes enforcement officer9. We could not confirm which building code the city enforces, what inspections it requires or what its permit fees are, so call city hall at (816) 862-8208 before you plan a build9. Cass County's building permit rules, which include the 2006 International Codes, are written for unincorporated land14.

How do septic permits work inside Garden City?

Inside the R-1 district, every dwelling must connect to the city's sanitary sewers, so a typical in-town house does not use a septic system3. We could not confirm who permits an on-site septic system on a lot that has no sewer service inside the city; the zoning text for the R-2 district contemplates lots without public sewer, but does not name an authority3. Ask city hall first9, then the Cass County Building Codes, Zoning & Environmental Health Department15.

Cass County's septic ordinance covers unincorporated land only and says the Cass County Environmental Health Department has administrative authority there4. Missouri requires a construction permit before installing or repairing most onsite systems16.

Building a home in Garden City: the steps, in order

  1. Confirm the zoning district of the lot with the city clerk, who keeps the district maps910.
  2. Check the lot against the district's minimum lot size, setbacks and minimum home size (see above)5.
  3. Ask city hall whether the lot has sewer; dwellings in R-1 must connect3.
  4. Pick up the building permit application from the city website or city hall2.
  5. If the project needs rezoning, use the city's rezoning application and checklist2; the Planning and Zoning Commission meets monthly17.
  6. Do not use county permit forms for a lot inside city limits; county permits apply to unincorporated land14.

What stays with Cass County, and what should you check before you buy?

Land outside Garden City's limits falls under Cass County's zoning, building and septic rules, which are covered on the Cass County page18. Before buying inside the city, confirm the district, sewer service and the codes enforcement rules with city hall9. Cass County's effective property tax rate is 0.9%19 and the median property tax bill is $2,364 per year20. A driveway or entrance on a state highway needs a MoDOT permit21.

Watch-outs

  • City zoning rules apply to land inside Garden City limits; land just outside is regulated by Cass County instead18.
  • We could not confirm the building code, inspections or permit fees inside Garden City, so ask city hall at (816) 862-82089.
  • We could not confirm RV, tiny-home or accessory dwelling rules inside Garden City; ask city hall before you plan to live in either9.
  • Missouri's septic rules say the residential exemption for lots under 3 acres does not apply everywhere, so ask about a septic permit even on a small lot16.

Sources

  1. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  2. Garden City building permit application and zoning checklists (gardencitymo.org)
  3. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  4. Cass County Missouri Wastewater Treatment Systems Ordinance, quoted and re-checked
  5. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  6. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  7. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  8. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  9. Garden City City Hall (City Clerk) (gardencitymo.org)
  10. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  11. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  12. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  13. Exhibit 14a: Zoning Ordinance - Garden City, MO (eCode360) (Garden City), quoted and re-checked
  14. casscounty.com, quoted and re-checked
  15. Cass County Building Codes, Zoning & Environmental Health Department (casscounty.com)
  16. OWTS Construction Permit Process (Missouri statewide rule), quoted and re-checked
  17. Garden City Planning and Zoning Commission (gardencitymo.org)
  18. Cass County Zoning Department Procedures, quoted and re-checked
  19. Effective property tax rate: Bolthole Index county data
  20. Median property tax bill: Bolthole Index county data
  21. Permits | Missouri Department of Transportation (Missouri statewide rule), quoted and re-checked

Written October 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Garden City

Garden City’s own rules

  • Local zoningPresent (with conditions)

    Land inside Garden City city's incorporated limits

    • Zoning ordinance adopted by ordinance 2002-518 (adopted 3/5/02) governs use of land, location of buildings and yard/height dimensions inside the city.
    • Later amendments are noted on the eCode360 page (ordinance 2020-708 and ordinance 2023-916 for district A); this claim does not verify each amendment's text.
    “an ordinance adopting a zoning ordinance for the city of garden city, missouri, relating to the regulating and restricting of the uses of land”
  • Zoning districtsPublished (with conditions)

    All land inside Garden City city limits

    • Districts listed in § ii: A (agriculture), R-1, R-2, R-3, R-3a, R-4 (manufactured home), C-O, C-B, C-1, C-2, C-P, M-1, M-2; the eCode360 table of contents also lists a C-DCB district (§ xiv-a) that was not opened.
    • District boundaries are shown on zoning district maps kept on file with the city clerk (§ iii).
    “the incorporated territory of the city of garden city, missouri, is hereby divided into the following districts, as follows:”
  • Minimum dwelling sizeSpecified

    One-family dwellings in district R-1 inside Garden City city limits

    • Floor area excludes basements, open or screen porches and garages.
    • Two-family dwellings in R-2 require 1,500 square feet per the R-2 section (not separately opened as a claim).

    minimum floor area of dwelling unit: >= 750 square feet (exclusive of basements, open or screen porches and garages)

    “g. floor area: every dwelling unit shall have a floor area, exclusive of basements, open or screen porches and garages, of not less than 750 square feet.”
  • Minimum lot sizeDistrict specific (with conditions)

    Main single-family residential district R-1 (first dwelling house district) inside Garden City city limits

    • Lot area minimum applies per dwelling; lots in separate ownership and conforming to earlier zoning at adoption may still have one one-family dwelling.
    • All dwellings must be connected to the city sanitary sewers (see utility_connection claim).

    minimum lot area per family: >= 8400 square feet (lots in separate ownership and conforming to previous zoning at adoption may still have one-family dwelling) · minimum mean lot width: >= 70 feet (width of not less than 65 feet at the building line)

    “f. lot area per family: every dwelling hereafter erected or altered shall provide a lot area of not less than 8,400 square feet”
    One more reviewed finding on this topic
  • SetbacksDistrict specific (with conditions)

    Main single-family residential district R-1 inside Garden City city limits

    • Setbacks are subject to the setback exceptions in § xx and the height and area exceptions in § xxiv of the zoning exhibit, which were not opened.
    • Side yard is 10 percent of lot width, not less than 7.5 feet and need not exceed 10 feet, on single-family dwellings.

    front yard depth: >= 25 feet · side yard (percent of lot width): >= 10 percent (minimum 7.5 feet; need not be more than 10 feet) · corner lot side yard on street side: >= 15 feet (where no adjacent interior lot faces the side street) · rear yard depth: >= 25 feet (where residence sits at an angle, average of measurements at each end must be at least 25 feet)

    “b. front yards: there shall be a front yard, the minimum depth of which shall be at least 25 feet.”
    One more reviewed finding on this topic
  • Building heightSpecified

    Agriculture district A inside Garden City city limits

    • Excludes accessory agricultural equipment and structures of a fireproof nature from the stated limit, per the same sentence.
    • Height exceptions in § xxiv were not opened.

    maximum building height: <= 35 feet (accessory agricultural equipment and structures of a fireproof nature) · maximum stories: <= 2.5 stories (accessory agricultural equipment and structures of a fireproof nature)

    “a. height: buildings or structures shall not exceed 35 feet and shall not exceed 2-1/2 stories in height except accessory agricultural equipment and structures of a fireproof nature.”
    One more reviewed finding on this topic
  • Manufactured homesLimited

    Manufactured and mobile homes used as dwellings inside Garden City city limits

    • Manufactured and mobile homes are permitted only in district R-4 (manufactured home district).
    • R-4 permits single- and multi-section permanent manufactured or modular homes; the zoning definition of dwelling excludes house trailers and mobile homes.
    “c. manufactured and mobile homes shall be permitted only in district r-4.”
  • Mandatory utility hookupSewer (with conditions)

    Dwellings in district R-1 inside Garden City city limits; the R-1 text says all dwellings must connect

    • No distance-to-main or sewer-availability threshold is stated in the opened R-1 text.
    • The R-2 section ties lot size to the absence of a public or community sewer (15,000 square feet, citing Missouri Clean Water Commission), which implies on-site disposal is possible where no sewer is available; the septic authority was not verified.
    • Water connection was not addressed in the opened zoning text; utility chapter 13 was not opened.
    “all dwellings must be connected to the sanitary sewers of the city.”
  • Subdividing landRegulated (with conditions)

    Land divisions inside Garden City city limits

    • Subdivision ordinance (Exhibit 10a, §§ 1.10 to 9.20) is listed on the code table of contents but was not opened; its requirements are not verified here.
    “exhibit 10a subdivision ordinance (§ 1.10 &ndash; § 9.20)”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Garden City or Cass County directly.

  • Owner-builder exemption — Owner-builder construction inside Garden City city limits
  • Building code adopted — Building code adoption inside Garden City city limits
  • Inspections — Building inspections inside Garden City city limits
  • Certificate of occupancy — Certificate of occupancy inside Garden City city limits
  • Lot coverage — Lot coverage inside Garden City city limits
15 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • 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 Garden City publishes no rule on the point, not that none exists. Cass County’s page lists the county offices to call.

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