Bolthole Index

Johnson County, Kansas

Zoning, building permits and septic rules in Mission, Kansas

Mission, Kansas requires a building permit from the city for most construction, renovation, roofing and demolition work1. The city sets its own zoning under Title IV Chapter 410 of its municipal code2. Buildings that produce sewage must connect to public sanitary sewer before the city issues a certificate of occupancy3; we could not confirm the city's septic permit rules.

At a glance

Building permit
Required from the City of Mission for most construction, roofing and demolition work41
Who issues it
The city's Building Official, not Johnson County1
Zoning
The city's own zoning districts apply inside city limits2
R-1 setbacks
Front yard 30 ft (20 ft in limited cases), side yard at least 5 ft, rear yard at least 20 ft5
R-1 height and coverage
35 ft and 2.5 stories; buildings cover at most 35% of the lot67
Sewer
Certificate of occupancy withheld until the building connects to public sanitary sewer3
Contractors
Must hold a Johnson County contractor license1
Subdividing land
Regulated under the city's subdivision chapter8

Who to call

Building permits

City of Mission Community Development (Building Official)

Building permits, plan review and building inspections inside Mission city limits

913.676.8360

6090 Woodson Street Mission, KS 66202

Zoning

City of Mission Planning + Zoning

Land use planning, permitted uses for a specific property, setbacks and subdivision of land inside Mission city limits

913.676.8350

6090 Woodson St. Mission, KS 66202

Septic permits

Johnson County Environmental Division (Department of Health and Environment)

Septic (on-site sewage) permits and household well permits in Johnson County; ask whether the county program applies to a specific Mission address

913-715-6900

11811 S. Sunset Drive, Suite #2700, Olathe, KS 66061

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 Mission means bringing your own water and power. The kit we’d start with:

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Does Mission, Kansas have zoning, and what does it mean for lot size and setbacks?

Yes. Mission, Kansas has its own zoning: the city's zoning districts in Title IV Chapter 410 of the municipal code apply to land inside city limits, including the R-1 single-family district2. Johnson County's zoning does not cover land inside Mission2. Questions about permitted uses and setbacks for a specific property go to9.

Dimensional rules differ by district. In the R-1 single-family district, a house needs a front yard of at least 30 feet, which can drop to 20 feet for an attached living area or covered porch only if the listed conditions are met; side yards of at least 5 feet; a street-side yard of at least 15 feet on a corner lot; and a rear yard of at least 20 feet5. A rear-yard accessory building in R-1 must sit at least 5 feet from side and rear lines and is capped at 120 square feet and 8 feet in height5. The primary structure's footprint may not exceed 30% of the lot, and all structures together may not exceed 35%7. Buildings in R-1 may not exceed 35 feet or 2.5 stories6.

Other districts, including R-2 and the manufactured-home district, have their own standards that we did not confirm10. Dividing land inside Mission is also regulated under the city's subdivision chapter8. We could not confirm Mission's rules on RV living, tiny homes, accessory dwellings or minimum house size, so ask the city's Community Development office before you plan around any of them.

Do you need a building permit in Mission, Kansas, and who issues it?

Yes. Construction, alteration, repair, moving, demolition or change of occupancy of a building inside Mission city limits requires an application to the Building Official and a permit before work starts4. The city's page says a building permit is required for most renovation, construction, roofing or demolition work, including electrical, plumbing, mechanical and irrigation alterations1. Mission's own Building Official handles plan review and inspections, not Johnson County Building Codes1.

Contractors working in Mission must be licensed under the Johnson County Contractor Licensing Program1. In a legally created sewer district, an outside sanitary sewer construction and connection permit from the sewer district is also required before the building permit4.

Mission's building codes page lists a fee schedule and calculators for building permits1, and says the city transitions to the newly adopted 2024 codes effective October 1, 20261. We could not confirm Mission's permit fees, an owner-builder exemption inside city limits, or the full inspection sequence. The county's homeowner exemption applies to unincorporated land, so ask1 before assuming it carries over.

How do septic permits work in Mission, Kansas?

In Mission, new buildings that produce sewage are expected to connect to the public sanitary sewer. The city will not issue a certificate of occupancy for a building that produces sewage until it is connected to a public sanitary sewer system3. Kansas allows a private sewerage facility only when public sewers are not available and all local requirements are met11. For most Mission lots, a septic system is therefore not the planning assumption.

We could not confirm whether Mission issues septic permits itself or defers to the county. Johnson County's septic program issues permits for private sewage treatment systems where property owners are not served by a public wastewater collection system12, and the county's installation permit fee is $48013. Ask14 whether the county program applies to a specific Mission address.

Wells are a separate question. Johnson County lists a permit as required for household wells at a $65 fee15, and Kansas notes that some cities have their own well permitting requirements16. We could not confirm whether Mission adds its own well rules.

Building a home in Mission, Kansas: the steps, in order

  1. Confirm the property is inside Mission city limits. Johnson County tells applicants whose address returns a city name to contact that city's planning department17.
  2. Ask9 which zoning district the lot is in and which setbacks, height and lot-coverage limits apply2.
  3. Confirm sewer service. A building that produces sewage must connect to public sanitary sewer before the city issues a certificate of occupancy3, and a sewer district may require its own permit first4.
  4. Hire a contractor with a Johnson County contractor license1.
  5. Apply to Mission's Building Official and get the building permit before work starts4.
  6. Schedule each inspection through GovBuilt with at least 48 hours' notice1.
  7. Get the certificate of occupancy once the sewer connection is in place3.

What stays with Johnson County, and what should you check before you buy in Mission?

The city handles building permits and zoning inside Mission. Johnson County's own building permit and zoning rules cover only unincorporated land, which is why the Johnson County page is the place to look for land outside city limits18. Septic and well permits are county-level programs that may reach into Mission, and Johnson County also requires a septic inspection within 60 days of a purchase in areas covered by its sanitary code19.

Before you buy, confirm the zoning district and sewer availability for the specific lot. We could not confirm Mission's floodplain rules, driveway access rules or short-term rental rules, so ask9 about those. Costs are county-level figures: Johnson County's effective property tax rate is 1.2%20, and its typical home value is $468,65121.

Watch-outs

  • Johnson County's building permit and zoning rules cover only unincorporated land, so inside Mission the city's Building Official and Planning + Zoning office are the ones to call18.
  • Mission's building codes page says the city moves to the newly adopted 2024 codes effective October 1, 2026, so check which edition applies to your plans before you submit1.
  • We could not confirm Mission's rules on RV living, tiny homes, accessory dwellings, minimum house size or permit fees; ask Mission Community Development before you commit to a plan9.
  • Septic permit rules inside Mission are unconfirmed; ask the Johnson County Environmental Division whether the county septic program covers your address14.

Sources

  1. City of Mission Community Development (Building Official) (missionks.org)
  2. Article I: Residential Districts - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  3. Article II: Building Permits, Chapter 505 - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  4. Article II: Building Permits, Chapter 505 - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  5. Article I: Residential Districts - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  6. Article I: Residential Districts - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  7. Article I: Residential Districts - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  8. Table of Contents - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  9. City of Mission Planning + Zoning (missionks.org)
  10. Article I: Residential Districts - City of Mission, KS (eCode360) (Mission), quoted and re-checked
  11. MF2214 Minimum Standards for Design and Construction of Onsite Wastewater Systems (Kansas statewide rule), quoted and re-checked
  12. Septic Systems, quoted and re-checked
  13. Residential Systems, quoted and re-checked
  14. Johnson County Environmental Division (Department of Health and Environment) (jocogov.org)
  15. Water Well County Permits, quoted and re-checked
  16. Water Well County Permits (Kansas statewide rule), quoted and re-checked
  17. Unincorporated Area, quoted and re-checked
  18. Permits and Licenses Guide, quoted and re-checked
  19. Septic Systems, quoted and re-checked
  20. Effective property tax rate: Bolthole Index county data
  21. Typical home value (Zillow): Bolthole Index county data

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 Mission

Mission’s own rules

  • Building permitRequired

    Construction, alteration, repair, moving, demolition or change of occupancy of buildings inside Mission city limits.

    • Application to the Building Official and the required permit must come before the work.
    • Johnson County contractor licensing applies to permitted work per Chapter 505 Article II (contractor license text seen only in fragment).
    • Outside sanitary sewer construction and connection permit required from the sewer district before a building permit in a legally created sewer district (section 505.046).
    “shall first make application to the building official and obtain the required permit.”
  • Building code adoptedAdopted

    Residential building construction inside Mission city limits: International Residential Code 2018 edition.

    • Adoption text is in Chapter 500 Article III section 500.040; the ordinance history lists Ord. No. 1570, 12-21-2022, which is not stated as an effective date and is not used as effective_at.
    • Other codes (IBC 2018, IPC 2018, NEC 2017, IPMC 2018, IFC 2018, IECC 2018, Johnson County Environmental Sanitary Code 2025) were seen only in search snippets and are not claimed here.
    “a. there is hereby adopted the international residential code 2018, to include appendices e, h, j, k, and p, published by the international code council”
  • Certificate of occupancyRequired

    Buildings in Mission city that generate sanitary sewage, inside city limits.

    • CO is withheld until the building is connected to a public sanitary sewer system (section 505.048).
    • Building Official issues COs under Chapter 505; Chapter 445 title lists certificate of occupancy but its CO procedure text was not opened.
    • IBC 2018 (adopted) includes temporary CO provisions per search snippet only, not verified.
    “no certificate of occupancy shall hereafter be issued by the building official or his/her authorized representative for any and all buildings of any and all zoning classification from which sanitary sewage will or may originate until the building is connected with a public sanitary sewer system.”
  • Local zoningPresent (with conditions)

    Land inside Mission city limits: the city's own zoning districts in Title IV Chapter 410 apply, including the R-1 single-family district.

    • Use and dimensional limits apply by district; see the district-specific claims.
    • Applies only inside city limits; unincorporated Johnson County land is not covered.
    “b. height and area regulations generally. in district "r-1", the height of buildings, the minimum dimension of lots and yards and the minimum lot area per dwelling unit permitted on any lot shall be as follows in subsections (c) through (i) of this section (for exceptions see section 415.010).”
  • Zoning districtsPublished

    Zoning districts inside Mission city limits.

    • Only the R-1 district text was opened. Search results also indicated R-2, R-3, R-4, MH, MP, M-1, C-1, C-2A, C-2B, C-2, MS1, MS2, DND and MXD districts; these were not opened and are not claimed here.
    “section 410.020 "r-2" (rp-2) two-family residential district.”
  • SetbacksSpecified

    Single-family dwellings in the R-1 single-family residential district inside Mission city limits.

    • Front yard may be reduced to 20 feet for an attached living area or covered porch only if the listed conditions are met (planning commission approval, drainage, design and materials).
    • Corner lots require a 15-foot street-side yard.
    • Accessory building in rear yard: minimum 5-foot setback from side and rear lines per section (a)(5)(c), a maximum 120 sq ft and 8 ft height.

    front yard: >= 30 feet (may be reduced to 20 feet under listed conditions) · side yard: >= 5 feet (corner lot street side 15 feet) · rear yard: >= 20 feet (none stated in quoted text)

    “e. side yards. 1. there shall be a side yard on each side of a dwelling no less than five (5) feet and need not be more than fifteen (15) feet. 2. buildings on corner lots shall provide a side yard on the street side of not less than fifteen (15) feet. f. rear yards. the depth of the rear yard shall be at least twenty (20) feet.”
  • Lot coverageSpecified

    Single-family dwellings and their lots in the R-1 district inside Mission city limits.

    • Primary structure footprint is capped at 30% of lot area.
    • Total coverage by all structures including accessory structures is capped at 35% of lot area.

    primary structure footprint: <= 30 percent of lot area (none stated) · total lot coverage including accessory structures: <= 35 percent of lot area (none stated)

    “the footprint of the primary structure may not exceed thirty percent (30%) of the total lot area. the total maximum lot coverage of all structures, including accessory structures, shall not exceed thirty-five percent (35%) of the total lot area.”
  • Building heightSpecified

    Buildings and structures in the R-1 district inside Mission city limits.

    • Height limit applies to R-1 per subsection c; other districts not opened.

    building height: <= 35 feet (none stated) · stories: <= 2.5 stories (none stated)

    “c. height. buildings or structures shall not exceed thirty-five (35) feet and shall not exceed two and one-half (2½) stories in height.”
  • Mandatory utility hookupSewer (with conditions)

    New buildings in Mission city that generate sanitary sewage, when a public sanitary sewer system serves them.

    • A certificate of occupancy will not be issued until the building is connected with a public sanitary sewer system (section 505.048).
    • Building permits in a legally created sewer district require an outside sanitary sewer construction and connection permit from the sewer district (section 505.046).
    • Distance or availability threshold not located in the opened text; water connection requirement not verified.
    “no certificate of occupancy shall hereafter be issued by the building official or his/her authorized representative for any and all buildings of any and all zoning classification from which sanitary sewage will or may originate until the building is connected with a public sanitary sewer system.”
  • Subdividing landRegulated (with conditions)

    Land divisions inside Mission city limits under Title IV Chapter 455 Subdivisions.

    • Chapter 455 contents were not opened; regulation is shown by the chapter's existence in the code.
    “chapter 455 subdivisions (section 455.010 &ndash; section 455.400)”
  • Permit processPartial

    Building permit application inside Mission city limits.

    • Application goes to the Building Official, who issues the permit (section 505.040).
    • Fees, plan-review steps and inspection sequence are not in the opened text.
    “shall first make application to the building official and obtain the required permit.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Mission or Johnson County directly.

  • Owner-builder exemption — Owner-builder work inside Mission city limits.
  • Inspections — Building inspections for permitted work inside Mission city limits.
  • Minimum dwelling size — Single-family dwellings inside Mission city limits.
  • Living in an RV — Long-term RV occupancy inside Mission city limits.
  • Camping on your land — Temporary camping inside Mission city limits.
13 more unanswered
  • Tiny homes
  • Manufactured 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

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 Mission publishes no rule on the point, not that none exists. Johnson County’s page lists the county offices to call.

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