Bolthole Index

Wayne County, Michigan

Zoning, building permits and septic rules in Southgate, Michigan

Southgate, Michigan requires a building permit before any building or structure is erected, altered, moved or repaired, and the city issues it1. Southgate also runs its own zoning code through its director of inspections2. Septic permits, where a lot has no public sewer, come from Wayne County Environmental Health, not the city3.

At a glance

Building permit
Required before any building or structure is built, altered, moved or repaired; issued by the city1
Zoning
Southgate administers its own zoning code and zoning districts24
Minimum home size (R-1)
1,400 sq ft of floor area per unit5
Minimum lot (R-1)
10,000 sq ft and 80 ft wide, reducible by the Planning Commission6
Certificate of occupancy
Required before anyone occupies a new building7
Septic
Wayne County Environmental Health permits onsite systems where sewer is unavailable3
Owner-builder
State licensing exemption for your own home; a permit is still required8
RV or tiny-home living
We could not confirm; zoning decides it, so ask the Building Department2

Who to call

Building permits

Southgate Building Department

Building permits, inspections and certificates of occupancy inside Southgate city limits

(734) 258-3010

14400 Dix Toledo Rd, Southgate, MI 48195

Septic permits

Wayne County Health, Human and Veterans Services - Environmental Health Section

Onsite sewage (septic) and well permits for Wayne County, including its cities

(734) 727-7400

33030 Van Born Road, Wayne, MI 48184

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

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Does Southgate, MI have zoning, and what does it mean for lot size and setbacks?

Yes. The City of Southgate adopts and administers its own zoning code, and the director of inspections runs it2. The city divides its land into residential districts (R-1, R-1A, R-1B, R-2, RM and MH), nonresidential districts and a zoning map4.

In the R-1 one-family district, a lot needs at least 10,000 square feet and 80 feet of width, and the Planning Commission can reduce that to 8,400 square feet and 70 feet after a public hearing6. A new R-1 home needs at least 1,400 square feet of floor area5. R-1 setbacks are 30 feet in front, 10 feet on at least one side with 20 feet total for both sides, and 35 feet in the rear9. Buildings may cover at most 25 percent of an R-1 lot10, and the principal building may rise 2 stories and 25 feet11.

Other districts have their own numbers, so confirm your parcel's district with the Building Department12.

Do you need a building permit in Southgate, MI, and who issues it?

Yes. Southgate requires a building permit before any building or structure is erected, altered, moved or repaired, including a new home1. The city's Building Department at 14400 Dix Toledo Rd, phone (734) 258-3010, handles building permits and inspections12. Applications must include plans and a plot plan drawn to scale13, and no permit issues for work that violates the zoning code1.

The permit fee is the construction cost times a permit fee multiplier, with a minimum residential plan review fee of $3014. Starting work without a permit costs $100 for a first failure, $250 for a second and $500 for a third or later1.

A homeowner doing their own work files a homeowner's affidavit, and the Building Department asks for 24 hours' notice before an inspection12. Michigan exempts an owner building their own home from residential-builder licensing, but not from the permit8. A new home also needs a certificate of occupancy before anyone moves in7.

How do septic permits work inside Southgate, MI?

Septic permits for every address in Wayne County, city or not, come from Wayne County Environmental Health, not from Southgate3. Where public sewer is unavailable, a home must have an approved onsite system, and Wayne County requires a soil evaluation first15. The county's 2024 fee schedule lists a septic permit at $471 for systems under 1,000 gallons per day16.

Building inspection agencies in Wayne County want either proof of a municipal sewer connection or a sewage permit before they issue a building permit17. We could not confirm whether the lot you are looking at has city sewer, so ask the Southgate Building Department, and call18 if it does not.

County-wide, only 11.7% of soils rate as not limited for a conventional drain field, so expect a site evaluation and possibly an engineered system if sewer is not available19.

Can you live in an RV or tiny home on your land in Southgate, MI?

We could not confirm Southgate's rules for living in an RV, camping on a residential lot or placing a tiny home, so treat none of these as allowed until the city says so. Zoning is where this gets decided, because the city administers its own zoning code2. Ask the Building Department at (734) 258-3010 before you buy or park anything12.

Michigan's statewide campground rules cover licensed temporary campgrounds and do not answer whether you can live in an RV on your own lot20.

Building a home in Southgate, MI: the steps, in order

  1. Confirm your parcel's zoning district and its lot, setback and floor-area rules with the Building Department412.
  2. Find out whether city sewer serves the lot; if not, get a septic permit from Wayne County Environmental Health first1718.
  3. Prepare plans and a plot plan drawn to scale and apply for the building permit13.
  4. Build to the Michigan Building Code and Residential Code, which the state adopts statewide, and book inspections with 24 hours' notice2112.
  5. Request a certificate of occupancy after the work is finished; the building department inspects within 3 days of application7.

What stays with Wayne County, and what should you check before you buy in Southgate?

Wayne County, not the city, issues septic and well permits322. Wayne County also issues permits for driveway approaches and other work in county road right-of-way23; we could not confirm the city's own driveway rules, so ask the Building Department. Land outside Southgate city limits follows the rules on the Wayne County page.

Wayne County's effective property tax rate is 1.6% and its median property tax bill is $2,794 per year2425. Also ask the city about floodplain and short-term rental rules, which we could not confirm.

Watch-outs

  • We could not confirm whether a new home on a given Southgate lot must connect to city sewer or may use a septic system; ask the Building Department12 and Wayne County Environmental Health18.
  • Southgate's code adopts the International Property Maintenance Code, but we could not confirm which construction and plumbing codes the city enforces beyond the state's code, so ask the Building Department26.
  • Wayne County requires a septic system to be inspected and functioning before a home with onsite septic is sold27.

Sources

  1. Southgate Code Chapter 1262 Administration, Enforcement and Penalty (1262.01 to 1262.06) (Southgate), quoted and re-checked
  2. Southgate Code Chapter 1262 Administration, Enforcement and Penalty (1262.01 to 1262.06) (Southgate), quoted and re-checked
  3. Septic/Onsite Sewage - Wayne County, Michigan, quoted and re-checked
  4. Southgate Code Chapter 1266 Districts Generally and Zoning Map (Southgate), quoted and re-checked
  5. Southgate Code Section 1298.01 Schedule of Area Regulations and 1298.02 Subdivision Open Space Plan (Southgate), quoted and re-checked
  6. Southgate Code Section 1298.01 Schedule of Area Regulations and 1298.02 Subdivision Open Space Plan (Southgate), quoted and re-checked
  7. Southgate Code Chapter 1422 Property Maintenance Code, 1422.03 Certificates of Occupancy (Southgate), quoted and re-checked
  8. Frequently Asked Questions – Residential Builder, quoted and re-checked
  9. Southgate Code Section 1298.01 Schedule of Area Regulations and 1298.02 Subdivision Open Space Plan (Southgate), quoted and re-checked
  10. Southgate Code Section 1298.01 Schedule of Area Regulations and 1298.02 Subdivision Open Space Plan (Southgate), quoted and re-checked
  11. Southgate Code Section 1298.01 Schedule of Area Regulations and 1298.02 Subdivision Open Space Plan (Southgate), quoted and re-checked
  12. Southgate Building Department (southgatemi.org)
  13. Southgate Code Chapter 1262 Administration, Enforcement and Penalty (1262.01 to 1262.06) (Southgate), quoted and re-checked
  14. Southgate Code Section 1444.04 Building Fees (Southgate), quoted and re-checked
  15. Septic/Onsite Sewage, quoted and re-checked
  16. Wayne County Public Health EH Fee Schedule, quoted and re-checked
  17. Septic/Onsite Sewage, quoted and re-checked
  18. Wayne County Health, Human and Veterans Services - Environmental Health Section (waynecountymi.gov)
  19. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  20. Steps for Obtaining a Temporary Campground License, quoted and re-checked
  21. Code Books (Michigan statewide rule), quoted and re-checked
  22. Water/Well Permits, quoted and re-checked
  23. Construction Permits, quoted and re-checked
  24. Effective property tax rate: Bolthole Index county data
  25. Median property tax bill: Bolthole Index county data
  26. Southgate Code Chapter 1422 Property Maintenance Code, 1422.03 Certificates of Occupancy (Southgate), quoted and re-checked
  27. Septic/Onsite Sewage - Wayne County, Michigan, 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 Southgate

Southgate’s own rules

  • Building permitRequired

    Erection, alteration, moving or repair of any building or structure, including a new home, inside Southgate city limits.

    • Building permit must be issued before the work; applications require plans and a plot plan (section 1262.03).
    • Permit may not be issued for work that does not comply with the zoning code (section 1262.04(a)).
    • Failure to secure a permit before work starts carries a fee penalty (see parameters).

    unpermitted work penalty, first failure: 100 USD (second failure $250.00; third and additional failure $500.00)

    “no building or structure, or part thereof, shall be hereafter erected, altered, moved or repaired unless a building permit has been issued for such work.”
  • Building code adoptedPartial

    Construction of dwellings inside Southgate city limits: only the International Property Maintenance Code is confirmed as adopted by the city.

    • Section 1422.01 adopts the International Property Maintenance Code; section 1422.02 amends it.
    • Section 1268.04(a)(1) requires dwelling units to conform to all applicable city and state codes and ordinances.
    • The state construction code (residential or building) and the Michigan Plumbing Code (chapter 1424, listed in the table of contents) were not opened and are not confirmed here.
    “the building department shall make an inspection of the premises and shall ascertain compliance with pertinent zoning laws, the current international property maintenance code and other applicable codes and ordinances”
  • InspectionsRequired

    Occupancy inspections of buildings in Southgate city, including new dwellings, before a certificate of occupancy is issued.

    • Building department inspects premises and checks compliance with zoning, the International Property Maintenance Code and other codes (section 1422.03(c)).
    • Single-family rental units are inspected every three years or when reoccupied by a new tenant (section 1422.03(e)).
    • Inspection timing for construction-stage inspections was not located in opened pages.
    “the building department shall make an inspection of the premises and shall ascertain compliance with pertinent zoning laws, the current international property maintenance code and other applicable codes and ordinances”
  • Certificate of occupancyRequired

    Occupancy or reoccupancy of any building or part of a building, including a new home, inside Southgate city limits.

    • Application with fee to the building department; the department inspects within three days of application and issues the certificate if approved (section 1422.03(b)).
    • Temporary and final certificate rules for site improvements are in section 1262.06(h) and (i).

    inspection timing after application: <= 3 days

    “no person shall hereafter occupy or reoccupy, and no owner or agent thereof shall permit the occupation or reoccupation of any building or addition thereto or part thereof, for any purpose, until a certificate of occupancy has been issued by the building department.”
  • Local zoningPresent (with conditions)

    Land inside Southgate city limits: Southgate city administers its own zoning code (Part Twelve, Planning and Zoning Code, Title Six Zoning Code).

    • Zoning code is administered by the director of inspections (section 1262.01).
    • A building permit or occupancy certificate may not issue for use not in accordance with the zoning code (section 1262.04(a)).
    “for the purpose of this zoning code, the city is hereby divided into the following districts”
  • Zoning districtsPublished (with conditions)

    Zoning districts of Southgate city: residential R-1, R-1A, R-1B, R-2, RM and MH; nonresidential RO, C-1, C-2, C-3, P-1, PD and M-1; and the zoning map.

    • Boundaries are shown on the official zoning atlas and zoning map (section 1266.02).
    • Section 1298.01 also lists an R-E district that section 1266.01 omits; chapter 1266 table of contents also lists RC and M-2 districts that section 1266.01 omits.
    “for the purpose of this zoning code, the city is hereby divided into the following districts: residential districts r-1 one-family residential district r-1a one-family residential district r-1b one-family residential district r-2 two-family residential district rm multiple-family residential district mh mobile home district”
  • Minimum dwelling sizeDistrict specific (with conditions)

    New single-family detached dwelling in the R-1 one-family residential district inside Southgate city limits.

    • Minimum floor area per unit from the section 1298.01 schedule column headed minimum floor area per unit (sq. ft.).
    • Section 1268.04(a)(1) requires conformance with all applicable city and state codes and ordinances.

    minimum floor area per unit: >= 1400 sq ft

    “r-1 one-family residential 10,000(a) 80 (a) 2 25 30 (b) 10 (b, c) 20 (b, c) 35 (b) 1,400 25”
  • Minimum lot sizeDistrict specific (with conditions)

    Lot for a single-family dwelling in the R-1 one-family residential district inside Southgate city limits.

    • Minimum lot area 10,000 sq ft and minimum lot width 80 ft per the schedule; footnote (a) points to flexibility sections.
    • Section 1298.02(b)(1): the Planning Commission may reduce R-1 lots to 8,400 sq ft and 70 ft width after a public hearing, provided: "such lot area and lot width reductions are permitted, provided the dwelling unit density is not greater than 4.3 dwellings per acre."
    • Reduced lots require equal land reserved for common use (section 1298.02(b)(3)) and at least 15 percent of net site area as open space (section 1298.02(b)(4)).
    • R-1A minimum is 7,700 sq ft and 70 ft width; R-1B is 7,200 sq ft and 60 ft width (same table, followups).

    minimum lot area per dwelling unit: >= 10000 sq ft (Planning Commission may reduce to 8,400 sq ft under section 1298.02 with conditions) · minimum lot width: >= 80 ft (Planning Commission may reduce to 70 ft under section 1298.02)

    “such lot area and lot width reductions are permitted, provided the dwelling unit density is not greater than 4.3 dwellings per acre.”
  • SetbacksDistrict specific (with conditions)

    Principal building in the R-1 one-family residential district inside Southgate city limits.

    • Exterior side yard (street side) equals the front yard setback of the district (section 1298.01 note (c)(1)).
    • No residential structure closer than fifteen feet to another residential structure, reducible to thirteen feet where the attached garage is on that side (note (c)(2)).
    • Nonresidential uses in a residential district have larger setbacks under note (b); not applied here.

    front yard setback: >= 30 ft · least one side yard setback: >= 10 ft (footnote (b) and (c) apply) · total two side yards setback: >= 20 ft · rear yard setback: >= 35 ft (footnote (b) applies to nonresidential uses)

    “r-1 one-family residential 10,000(a) 80 (a) 2 25 30 (b) 10 (b, c) 20 (b, c) 35 (b) 1,400 25”
  • Lot coverageSpecified

    Maximum share of lot area covered by all buildings in the R-1 one-family residential district inside Southgate city limits.

    • Header reads maximum percent of lot area covered (by all buildings).

    maximum lot coverage by all buildings: <= 25 % of lot area

    “r-1 one-family residential 10,000(a) 80 (a) 2 25 30 (b) 10 (b, c) 20 (b, c) 35 (b) 1,400 25”
  • Building heightSpecified

    Principal building height in the R-1 one-family residential district inside Southgate city limits.

    • Churches and some nonresidential uses may exceed this height with added yards (section 1268.03(a)(1)); not applied here.
    • Note 1268.04(a)(5) requires new building height and stories to match adjacent homes.

    maximum stories: <= 2 stories · maximum height: <= 25 ft

    “r-1 one-family residential 10,000(a) 80 (a) 2 25 30 (b) 10 (b, c) 20 (b, c) 35 (b) 1,400 25”
  • Subdividing landRegulated (with conditions)

    Platting of land into lots inside Southgate city limits.

    • Subdivision open space plan requires final plat filing as required in the subdivision regulations (section 1298.02(e)).
    • Title Four of Part Twelve is titled subdivision regulations; its sections were not opened.
    “the developer shall reserve the total park area in accordance with paragraph (b)(3) hereof at the time of filing of the final plat as required in the subdivision regulations”
  • Permit feesPublished (with conditions)

    Building permit fees for new construction, alterations and additions inside Southgate city limits.

    • Permit fee equals construction cost times the permit fee multiplier, with the greater of three cost methods used (section 1444.04(a)(1)).
    • Minimum residential plan review fee applies (section 1444.04 plan review schedule, paragraph (2)).
    • Electrical, plumbing, heating and mechanical fees (1444.06 to 1444.09) and inspection fees (1444.03) were not opened.
    • Fee schedule read as shown on the current code page (through 2026 supplement s-24); later amendments not checked.

    building permit fee multiplier: 0.01 of construction cost (applied to construction cost determined under section 1444.04(a)(1)) · minimum residential plan review fee: >= 30 USD (minimum review fee for residential building permits)

    “the construction cost shall serve as the basis for the charging of permit fees by multiplying the construction costs by the permit fee multiplier as indicated in subsection (a)(2) hereof.”
  • Permit processPartial

    Building and zoning permit application process inside Southgate city limits.

    • Applications must be accompanied by plans and specifications including a plot plan, drawn to scale (section 1262.03).
    • Certificate of occupancy applications are made to the building department with the chapter 1444 fee (section 1422.03(b)).
    • Forms, timelines for plan review, and the zoning compliance application process were not located.
    “the director of inspections shall require that all applications for building permits be accompanied by plans and specifications, including a plot plan, in triplicate, drawn to scale”

Still unanswered

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

  • Owner-builder exemption — Owner-builder permit exemption for a home inside Southgate city limits.
  • Living in an RV — Living in an RV on private residential land inside Southgate city limits.
  • Camping on your land — Temporary camping on private land inside Southgate city limits.
  • Tiny homes — Occupancy of a tiny home inside Southgate city limits.
  • Manufactured homes — Placement of a manufactured or mobile home on a lot outside a mobile home park inside Southgate city limits.
11 more unanswered
  • 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

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

← All of Wayne County: county rules, score and offices