Bolthole Index

St. Louis County, Missouri

Zoning, building permits and septic rules in Manchester, Missouri

The City of Manchester, Missouri sets its own zoning but does not issue building permits; St. Louis County issues them after the city approves zoning1. Inside the R-1 single-family district, a new lot needs at least 18,000 square feet2. Septic permits are not handled by city hall: we could not confirm the exact office for a Manchester address, so call the St. Louis County Department of Public Health3.

At a glance

Zoning
City of Manchester zoning ordinance (Chapter 405)4
Building permit
Issued by St. Louis County, after city zoning approval1
Building code
City adopts the St. Louis County building code, with local amendments5
R-1 minimum lot
18,000 sq ft and 100 ft wide at the building line2
R-1 minimum home size
1,800 sq ft of living area on lots recorded in 1974 or later6
R-1 height limit
35 feet or 2.5 stories7
Septic
St. Louis County lists its Department of Public Health as an authority; confirm for your address3
Occupancy
Inspection and certificate of occupancy required before moving in8

Who to call

Planning & zoning

City of Manchester (city hall: municipal zoning review)

Municipal zoning authorization, fence and accessory-building applications, and occupancy permits inside Manchester city limits

636-227-1385

14317 Manchester Road, Manchester, MO 63011

Building permits

St. Louis County Department of Transportation and Public Works — Codes and Ordinances

Building permit review, fees and inspections for Manchester projects, after the city grants zoning approval

314-615-5184

41 South Central Avenue, 6th Floor, Clayton, MO 63105

Septic permits

St. Louis County Department of Public Health

County health office named by the state as an onsite wastewater (septic) authority for St. Louis County

(314) 615-0600

[email protected]

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

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Do you need a building permit in Manchester, MO, and who issues it?

Yes for most work, but not from the city. The City of Manchester states that it does not issue building permits and that St. Louis County handles that function1. Municipal zoning review by the city still comes first, before an application goes to the county1.

The city has adopted the St. Louis County building code with local amendments, so the code is the county's even though the permit counter is not the city's5. Call the county codes office at 314-615-5184 to ask whether a given project needs a building permit9. Before anyone moves in, Manchester requires an inspection and certificate of occupancy8.

Does Manchester, MO have zoning, and what does it mean for your lot?

Yes. Manchester has its own zoning ordinance, Chapter 405, with separate residential districts such as R-1 and R-2410. Find your parcel's district on the city zoning map before you plan anything.

In the R-1 single-family district, every lot needs at least 18,000 square feet and 100 feet of width at the building line, though an older smaller lot of record may still hold a single-family dwelling2. Buildings may not exceed 35 feet or 2.5 stories, subject to supplementary rules we did not review7. Homes on lots recorded in 1974 or later need at least 1,800 square feet of living area, and lower minimums apply to older lots6. That floor area would apply to a tiny home built as a primary dwelling in R-16.

Some small projects need only city zoning authorization and no county building permit, such as fences and small accessory buildings1. Land divisions fall under the city's subdivision chapter11.

How do septic permits work in Manchester, MO?

Most Manchester addresses are expected to be on public sewer, and the city's code says a sewer counts as available when it is within 200 feet of any part of the property12. When one is available, the owner must connect and abandon any septic tank or cesspool12.

Where no public sewer is available, the building sewer connects to an approved private or semi-public system12. Missouri requires a construction permit before installing or repairing most onsite wastewater systems, and some single-family lots may be exempt13. The state lists both the St. Louis County Plumbing Department and the St. Louis County Department of Public Health as authorities, and incorporated areas may be handled differently3. We could not confirm which office permits a septic system at a Manchester address, so call the county health department before buying a lot without sewer14.

Can you live in an RV or tiny home in Manchester, MO?

We could not confirm a Manchester rule on long-term RV living, camping, tiny homes, manufactured homes or accessory dwellings. Ask the City of Manchester zoning staff at 636-227-1385 before you buy1. In R-1, the accessory buildings the district allows are garages, pools and game courts, with no second dwelling unit listed4. A primary dwelling in R-1 must also meet the minimum floor area for its lot6.

What are the steps to build a home in Manchester, MO?

  1. Confirm your parcel's zoning district on the city zoning map and check the district's lot, size and height rules4.
  2. Get municipal zoning authorization from the City of Manchester, which is required before any building permit application1.
  3. Apply to St. Louis County for the building permit; applications go through the county permitting portal1.
  4. If the lot has no public sewer within 200 feet, ask the county health department about a septic permit1214.
  5. Pass the county's inspections, then get the occupancy inspection and certificate of occupancy before anyone moves in8.

What stays with St. Louis County, and what should you check before buying in Manchester?

Building permit review and inspections, and septic and well questions, sit with St. Louis County or the state rather than city hall13. Missouri requires a water well installation permit, although landowners may install their own well or pump without one under the cited rules15. The St. Louis County rules for unincorporated land do not apply inside city limits; see the St. Louis County page for land outside Manchester.

St. Louis County's effective property tax rate is 1.2%, with a median bill of $3,193 a year1617. Also check subdivision indentures, which can add private restrictions beyond city zoning18.

Watch-outs

  • Contact the City of Manchester before you submit a county building permit application, because city zoning review must come first1.
  • We could not confirm Manchester's building permit fees, owner-builder rules or lot coverage limits; ask the city and the St. Louis County codes office19.
  • Missouri's septic page says application fees for onsite sewage disposal are temporarily suspended from August 28, 2026, so ask the county health department what applies when you apply13.
  • Lot size, height and floor-area rules above are for the R-1 district only2; other districts differ10.

Sources

  1. City of Manchester (city hall: municipal zoning review) (manchestermo.gov)
  2. Chapter 405 Zoning Regulations, Article V District Regulations (eCode360) (Manchester), quoted and re-checked
  3. OWTS Construction Permit Process — St. Louis County authorities, quoted and re-checked
  4. Chapter 405 Zoning Regulations, Article V District Regulations (eCode360) (Manchester), quoted and re-checked
  5. Chapter 500 Building Codes and Regulations, Article I Building Code (eCode360) (Manchester), quoted and re-checked
  6. Chapter 405 Zoning Regulations, Article V District Regulations (eCode360) (Manchester), quoted and re-checked
  7. Chapter 405 Zoning Regulations, Article V District Regulations (eCode360) (Manchester), quoted and re-checked
  8. Chapter 505 Property Maintenance Code, occupancy permits (eCode360) (Manchester), quoted and re-checked
  9. St. Louis County Department of Transportation and Public Works — Codes and Ordinances (stlouiscountymo.gov)
  10. Chapter 405 Zoning Regulations, Article V District Regulations (eCode360) (Manchester), quoted and re-checked
  11. City of Manchester, MO code of ordinances (eCode360) table of contents (Manchester), quoted and re-checked
  12. Chapter 520 Sewers and Sewage Disposal (eCode360) (Manchester), quoted and re-checked
  13. OWTS Construction Permit Process, quoted and re-checked
  14. St. Louis County Department of Public Health (stlouiscountymo.gov)
  15. Water Wells - PUB2945, quoted and re-checked
  16. Effective property tax rate: Bolthole Index county data
  17. Median property tax bill: Bolthole Index county data
  18. Single-Family Dwelling Design Checklist, 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 Manchester

Manchester’s own rules

  • Building code adoptedAdopted

    Building construction inside Manchester city limits: the city adopts the St. Louis County building code, with local amendments

    • The adopted code is St. Louis County's building code, as set forth in St. Louis County Ordinance No. 27,654, with local amendments effective July 1, 2020.
    • Wherever the county or its officials are referenced, the city or its corresponding official is substituted.
    • The term building official means the city engineer or designee, except under a county inspection contract, where it means the county public works director or designee.
    • Source: Chapter 500 Article I, sections 500.010 and 500.020.
    “the city hereby adopts as its building code the building code of st. louis county as is set forth in st. louis county ordinance no. 27,654, with local amendments as adopted on april 1, 2020, effective july 1, 2020”
  • InspectionsRequired

    Occupancy of commercial, multi-family and single-family structures in Manchester city

    • Inspection is required before occupancy under the property maintenance code (Chapter 505), which is separate from construction-stage inspections.
    • Under section 500.010, inspections may be performed by St. Louis County under a contract with the city.
    “commercial, multi-family residential or single-family residential structure in the city without first obtaining an inspection and certificate of occupancy.”
  • Local zoningPresent

    Land inside Manchester city limits: the city's own zoning ordinance (Chapter 405) and its R-1 single-family residential district.

    • Search-result snippet said Chapter 405 applies within the corporate limits; that scope sentence was not verified on an opened page.
    “section 405.170 "r-1" single-family residential district.”
  • Zoning districtsPublished

    Zoning districts inside Manchester city limits

    • Article V lists the district sections; the district maps (Article III, section 405.010 onward) were not opened.
    “section 405.180 "r-2" single-family residential district.”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Single-family dwellings in the R-1 single-family residential district, Manchester city

    • Floor area is measured as living area exclusive of garages, carports, porches, breezeways, basements, cellars, and any space where the ceiling height is less than seven feet six inches.
    • Lots of record as of or prior to July 5, 1960 require 1,150 sq ft; lots recorded July 6, 1960 to January 1, 1974 require the subdivision average or 1,400 sq ft.
    • No single-family dwelling may be built on a lot less than 100 feet wide at the building line.
    • Source reference: section 405.170(a)(1).

    minimum floor area (lots recorded on or after January 1, 1974): >= 1800 sq ft of living area (lower minimums apply to lots recorded before January 1, 1974)

    “c. on lots of record recorded january 1, 1974, or thereafter, single-family dwellings having a minimum floor area of one thousand eight hundred (1,800) square feet of living area”
  • Minimum lot sizeSpecified

    R-1 single-family residential district, Manchester city

    • If a lot of record has less area or width than required, it may be used only for a single-family dwelling.

    minimum lot area: >= 18000 sq ft (lots of record smaller than this may be used only for a single-family dwelling) · minimum lot width at building line: >= 100 ft (same as above)

    “every lot shall have an area of not less than eighteen thousand (18,000) square feet and a minimum width at the building line of one hundred (100) feet except that if a lot of record has less area or width than herein required, that lot may be used only for a single-family dwelling.”
  • Building heightSpecified

    R-1 single-family residential district, Manchester city

    • Subject to the exceptions in article VIII, supplementary height, area and bulk regulations, which were not opened.

    maximum building height: <= 35 ft (except as provided in article VIII supplementary height, area and bulk regulations) · maximum stories: <= 2.5 stories (same as above)

    “d. height regulations. no building shall exceed two and one-half (2½) stories or thirty-five (35) feet in height, except as provided in article viii, supplementary height, area and bulk regulations.”
  • Mandatory utility hookupSewer (with conditions)

    A new home inside Manchester city limits, when a public sanitary sewer is available

    • A sewer is available if it is within 200 feet of any part of the property to be connected.
    • When available, the owner must connect directly and abandon any septic tank or cesspool (section 520.020, text partly not reproduced here).
    • Where no public sanitary sewer is available, the building sewer connects to an approved private or semi-public system.

    sewer availability distance: <= 200 ft (measured to any part of the property)

    “c. a sewer shall be considered "available" if it is within two hundred (200) feet of any part of the property to be connected to the sewer.”
  • Subdividing landRegulated (with conditions)

    Land divisions inside Manchester city limits

    • Only the chapter title and section range are confirmed; the requirements in Chapter 415 were not opened.
    “chapter 415 subdivision regulations (section 415.010”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Manchester or St. Louis County directly.

  • Building permit — New construction permits in Manchester city
  • Owner-builder exemption — Owner-builder permitting in Manchester city
  • Lot coverage — Lot coverage in the R-1 district, Manchester city
  • Living in an RV — Long-term RV occupancy on private land in Manchester city
  • Camping on your land — Temporary camping on private land in Manchester city
14 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
  • 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 Manchester publishes no rule on the point, not that none exists. St. Louis County’s page lists the county offices to call.

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