Bolthole Index

Wayne County, Michigan

Zoning, building permits and septic rules in Grosse Ile Township, Michigan

Grosse Ile Township, Michigan adopts and enforces its own zoning ordinance1, and its building department takes building permit applications online and at township hall2. Private septic systems and wells are permitted by Wayne County Environmental Health, not the township3. A recreational vehicle in a single-family district may be lived in for only one week per calendar year4.

At a glance

Zoning
Township zoning (Chapter 285) with single-family, multiple-family, commercial and open-space districts15
Building permit
Required under the Michigan construction code; applied for through the township building department62
Septic
Wayne County Environmental Health permits onsite systems where sewer is not available37
Wells
Wayne County Environmental Health issues well permits8
RV living
Limited to one week per calendar year in single-family districts4
Minimum home size
1,500 sq ft usable floor area in R-1-A; 1,200 sq ft in R-1-B910
Owner-builder
State licensing exemption for your own home; the building permit is still required11

Who to call

Building permits

Grosse Ile Township Building Department

Building, electrical, mechanical and plumbing permit applications, payments and inspection scheduling inside the township

(734) 676-4422

9601 Groh Road, Grosse Ile, MI 48138

Septic permits

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

Onsite sewage (septic) and well permits for Wayne County

(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 Grosse Ile Township means bringing your own water and power. The kit we’d start with:

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Does Grosse Ile Township have zoning, and what does it mean for RVs, lot size and setbacks?

Yes. Grosse Ile Township writes and administers its own zoning ordinance, Chapter 285 of the township code1. The districts include R-1-A through R-1-D single-family districts, an R-1-F district for Hickory Island, multiple-family districts R-2 and R-3, an R-4 mobile home park district, commercial, airport and open-space districts5. The ordinance lists no agricultural or rural-residential district for homesteading.

Dimensions depend on the district. In R-1-A, the minimum lot area is 30,000 square feet per dwelling and the minimum lot width is 80 feet12. In R-1-B, the minimum lot area is 16,000 square feet13. In R-1-A the front and rear yards are 40 feet, with 6-foot side yards14. The maximum height is 35 feet in R-1-A15 and 30 feet in R-1-B16. The minimum floor area is 1,500 square feet in R-1-A9 and 1,200 square feet in R-1-B10.

In a single-family district, a stored or parked RV may be lived in for a total of one week per calendar year4. Manufactured homes are allowed as dwellings only if they meet HUD standards, and a used one must be found in excellent condition by the zoning administrator17. We could not confirm tiny-home or accessory-dwelling rules; ask the township building department.

Do you need a building permit in Grosse Ile Township, and who issues it?

Yes. Michigan requires a building permit before construction of a building or structure, and again when use or occupancy changes6. Inside Grosse Ile Township, the township building department handles applications2. The township says it is accepting all permits online2, and building permit, electrical, mechanical and plumbing applications and a new home construction packet are posted on its Building and Permits page2.

Michigan adopts a statewide building code, so the township's building permit review follows state rules18. A person who builds a home for their own use and occupancy on their own property is exempt from state residential-builder licensing, but that exemption does not remove the building permit requirement11. We could not confirm the township's fee schedule, inspection steps or certificate-of-occupancy procedure; call the building department. Michigan requires a certificate of occupancy for new or altered buildings19.

How do septic permits work inside Grosse Ile Township?

Septic permits do not come from the township. Wayne County acts as the local permitting agency for residential onsite sewage systems3, and a permit from Wayne County Environmental Health is required for new or repaired systems7. The county requires a soil evaluation and a plot plan with the application7. A permit is valid for one year7.

Homes with onsite septic systems in Wayne County outside Detroit must have the system inspected and working before the home is sold20. Whether your lot must connect to public sewer is a township and county utility question we could not confirm; ask the township and21. Well permits, for drinking-water and irrigation wells, also come from Wayne County Environmental Health8. Across the county, only about 12% of soils rate as not limited for a conventional drain field, so expect a site evaluation22.

Building a home in Grosse Ile Township: the steps, in order

  1. Confirm the zoning district of the parcel in the township zoning ordinance and map, then check the lot area, width, setbacks and floor-area minimums for that district5.
  2. Ask the township whether public sewer is available. If it is not, get a septic permit and soil evaluation from Wayne County Environmental Health7, and a well permit if you need a well8.
  3. Apply for the building permit through the township building department's online permit system2.
  4. Add electrical, mechanical and plumbing permits, which have their own applications on the township page2.
  5. Have all construction inspected; Michigan requires inspection of work done under a building permit23.
  6. Obtain a certificate of occupancy before moving in19.

What stays with Wayne County, and what to check before you buy in Grosse Ile Township

Septic, wells and time-of-sale septic inspections stay with Wayne County Environmental Health38. Driveway approaches on county road right-of-way need a Wayne County permit24, and a driveway onto a state highway needs a state permit25. Development in a regulated 100-year floodplain needs state approval26. For land outside the township, see the Wayne County page.

Creating new lots is regulated under the township's Chapter 238 Subdivision Control, and every new lot needs a building envelope outside regulated wetlands27. Wayne County's effective property tax rate is 1.6%28.

Watch-outs

  • We could not confirm the township's permit fees or certificate-of-occupancy procedure; call the township building department2 before you plan a budget.
  • Septic permits for every address come from Wayne County Environmental Health, so a township building permit does not cover them3.
  • RV living is limited to one week per calendar year in single-family districts, so an RV cannot serve as a home while you build4.
  • Setbacks have footnote exceptions in the ordinance table, including a 25-foot setback from the high-water mark of ponds, rivers and wetlands, so confirm your parcel's numbers with the zoning administrator14.

Sources

  1. Chapter 285 Zoning, Article 2: Zoning Districts and Zoning Map (eCode360) (Grosse Ile Township), quoted and re-checked
  2. Grosse Ile Township Building Department (grosseile.com)
  3. Septic/Onsite Sewage - Wayne County, Michigan, quoted and re-checked
  4. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  5. Chapter 285 Zoning, Article 2: Zoning Districts and Zoning Map (eCode360) (Grosse Ile Township), quoted and re-checked
  6. Building Permit Information, quoted and re-checked
  7. Septic/Onsite Sewage, quoted and re-checked
  8. Water/Well Permits, quoted and re-checked
  9. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  10. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  11. Frequently Asked Questions – Residential Builder (2026 county census)
  12. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  13. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  14. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  15. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  16. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  17. Chapter 285 Zoning, Article 3: Single-Family Residential Districts (eCode360) (Grosse Ile Township), quoted and re-checked
  18. Code Books (Michigan statewide rule), quoted and re-checked
  19. Certificate of Occupancy Request (Michigan statewide rule), quoted and re-checked
  20. Septic/Onsite Sewage - Wayne County, Michigan, quoted and re-checked
  21. Wayne County Health, Human and Veterans Services - Environmental Health Section (waynecountymi.gov)
  22. 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
  23. courts.michigan.gov (Michigan statewide rule), quoted and re-checked
  24. Construction Permits, quoted and re-checked
  25. Infrastructure permits (Michigan statewide rule), quoted and re-checked
  26. Floodplains (Michigan statewide rule), quoted and re-checked
  27. Township of Grosse Ile, MI code table of contents (eCode360) (Grosse Ile Township), quoted and re-checked
  28. Effective property tax rate: 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 Grosse Ile Township

Grosse Ile Township’s own rules

  • Local zoningPresent

    Land inside Grosse Ile township's limits; the township adopts and administers its own zoning ordinance (Chapter 285 Zoning).

    • Zoning districts, lot, setback, height and floor-area limits are set by Chapter 285 Zoning; Article 3 covers single-family residential districts.
    “for the purposes of this chapter, the township of grosse ile is hereby divided into the following zoning districts which shall be known by the following names and symbols”
  • Zoning districtsPublished

    Zoning districts inside Grosse Ile township: R-1-A, R-1-B, R-1-C, R-1-D, R-1-E overlay, R-1-F (Hickory Island), R-2, R-3, R-4 (mobile home park), C-1, MSD, SE, A-1, O-1 and PRD.

    • The R-1-E single-family overlay applies to all land zoned R-1-A, R-1-B, R-1-C, R-1-D and R-1-F and governs newly created lots.
    “r-1-a single-family residential district r-1-b single-family residential district r-1-c single-family residential district r-1-d single-family residential district r-1-e single-family residential overlay district r-1-f hickory island single-family residential district r-2 low-density multiple-family residential district r-3 medium-density multiple-family residential district r-4 mobile home park district c-1 convenience commercial district msd macomb street district se special environmental district a-1 airport and light industrial district o-1 open space district prd public recreation district”
  • Minimum dwelling sizeSpecified

    Main single-family residential district R-1-A inside Grosse Ile township.

    • Minimum usable floor area per dwelling unit from Table 3.5 (R-1-A column).

    minimum usable floor area per dwelling unit (R-1-A): >= 1500 sq ft

    “minimum usable floor area per dwelling unit (square feet) 1,500 1,200 1,000 1,800 1,800 1,000 maximum height (feet) 35 30 30 30 30 30”
    One more reviewed finding on this topic
  • Minimum lot sizeSpecified

    Main single-family residential district R-1-A inside Grosse Ile township.

    • Minimum net lot area is calculated exclusive of submerged area and public street right-of-way or access easement (Table 3.5 note 1).
    • Lot area is for each dwelling unit; newly created lots must have a building envelope outside regulated wetlands.

    minimum lot area per dwelling unit (R-1-A): >= 30000 sq ft · minimum lot width (R-1-A): >= 80 ft (100 ft on corner lots)

    “minimum lot area per dwelling unit (1) (square feet) 30,000 16,000 6,500 20,000 30,000 10,000”
    One more reviewed finding on this topic
  • SetbacksSpecified

    Main single-family residential district R-1-A inside Grosse Ile township.

    • Setbacks are in feet from Table 3.5; footnotes (3) through (10) of the table apply and were not fully reproduced.
    • Accessory building rear yard setback is 6 ft in R-1-A (footnote 8 refers to article 19, general provisions).
    • Natural feature setback of 25 ft applies from the ordinary high-water mark of ponds, rivers, channels, drainageways and regulated wetlands (footnote 9).

    front yard setback (R-1-A): >= 40 ft (footnotes (3)-(5) apply) · side yard setback (R-1-A): >= 6 ft (footnote (6) applies) · combined side yards (R-1-A): >= 18 ft · rear yard setback (R-1-A): >= 40 ft (footnote (10) applies) · accessory building rear yard (R-1-A): >= 6 ft

    “minimum setbacks (feet) front yard (3) (4) 40 (5) 40 30 40 40 50 side yard 6 (6) 6 (6) 5 12 12 5 (7) combination of both side yards 18 18 10 28 28 10 (7) rear yard (10) 40 40 30 40 40 30 for accessory buildings 6 (8) 6 (8) 6 (8) 12 (8) 12 (8) 3 (7)”
    One more reviewed finding on this topic
    • Specified — Single-family residential district R-1-B inside Grosse Ile township.
      “minimum setbacks (feet) front yard (3) (4) 40 (5) 40 30 40 40 50 side yard 6 (6) 6 (6) 5 12 12 5 (7) combination of both side yards 18 18 10 28 28 10 (7) rear yard (10) 40 40 30 40 40 30 for accessory buildings 6 (8) 6 (8) 6 (8) 12 (8) 12 (8) 3 (7)”
  • Building heightSpecified

    Main single-family residential district R-1-A inside Grosse Ile township.

    • Maximum height limit from Table 3.5 (R-1-A column).

    maximum height (R-1-A): <= 35 ft

    “minimum usable floor area per dwelling unit (square feet) 1,500 1,200 1,000 1,800 1,800 1,000 maximum height (feet) 35 30 30 30 30 30”
    One more reviewed finding on this topic
  • Living in an RVLimited

    Recreational vehicles stored or parked on lots with a principal structure in single-family residential districts inside Grosse Ile township.

    • Occupancy of a recreational vehicle may only be permitted if the occupant is the occupant of such lot or permanent residence, or a relative of the occupant of such lot.
    • RV must be the property of the occupant, have a current year's license, and be stored within a garage or in non-required side or rear yards when not in use.
    • Recreational vehicles may not be parked in a public street right-of-way or private road access easement for more than four hours in any day.
    • Living use of an RV is limited to one week per calendar year.
    • Other provisions of the zoning ordinance and Chapter 1 enforcement are not reviewed here.

    living occupancy of RV: <= 7 days per calendar year (the occupant-relative condition above)

    “a stored, parked or placed recreational vehicle may only be occupied or used for living purposes for a total of one week during any one calendar year.”
  • Manufactured homesLimited

    Manufactured homes used as a dwelling unit in single-family residential districts inside Grosse Ile township.

    • The manufactured home must be new and certified to HUD mobile home construction and safety standards (24 CFR 3280), or used, certified to those standards, and found by the zoning administrator to be in excellent condition and fit for residential occupancy.
    • Dwelling must meet all applicable roof snow load and strength requirements.
    • Where regulations conflict, the more stringent applies.
    “if the dwelling unit is a manufactured home, the manufactured home must either be: (a) new and certified by the manufacturer and/or appropriate inspection agency as meeting the united states department of housing and urban development, mobile home construction and safety standards (24 cfr 3280)”
  • Subdividing landRegulated (with conditions)

    Creation of new lots and plats inside Grosse Ile township.

    • Regulated under Chapter 238 Subdivision Control; the chapter body was not opened, so approval steps are not described here.
    • Table 3.5 note 1 requires every newly created lot to have a building envelope outside regulated wetlands.
    “chapter 238 subdivision control (§ 238-1 &ndash; § 238-16)”

Still unanswered

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

  • Owner-builder exemption — Owner-builder permit exemption inside Grosse Ile township.
  • Building code adopted — Building code applicable inside Grosse Ile township.
  • Inspections — Building inspections for new dwellings inside Grosse Ile township.
  • Certificate of occupancy — Certificate of occupancy for new dwellings inside Grosse Ile township.
  • Lot coverage — Lot coverage limits for single-family lots inside Grosse Ile township.
15 more unanswered
  • Camping on your land
  • Tiny 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
  • 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 Grosse Ile Township publishes no rule on the point, not that none exists. Wayne County’s page lists the county offices to call.

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