Bolthole Index

Cook County, Illinois

Zoning, building permits and septic rules in the Village of Riverdale, Illinois

The Village of Riverdale, Illinois requires building permits under its own building code1 and administers its own zoning code for land inside village limits2. Septic is separate: a private sewage system needs a written village permit3, and Cook County's health department says it reviews private systems throughout the county4. Cook County's building and zoning counters serve only unincorporated land5.

At a glance

Building permit
Required; administered by the village building and zoning department1
Zoning
Village's own zoning code and district map26
Septic
Written village permit required; no soil-absorption system on lots under 44,000 square feet37
Sewer connection
Required within 90 days of notice when a public sewer is within 300 feet8
Septic permit fee
$50 for a single-family home3
County-level property tax
Cook County effective rate is about 2%9

Who to call

Building permits

Village of Riverdale Village Hall

Village hall and Inspectional Services department; ask here for building permits, zoning and the village septic permit

708.841.2200

157 W. 144th St., Riverdale, IL 60827

Building permits

Village of Riverdale forms and applications

Downloadable village applications, including the building permit application and the official zoning map

Septic permits

Cook County Department of Public Health - Environmental Health

County review of private sewage disposal systems and well/septic evaluations

708-836-8600

7556 Jackson Boulevard, Forest Park, IL 60130

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

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Does Riverdale, IL have zoning, and what does it mean for my lot?

Yes. The Village of Riverdale divides its land into zoning districts under its own zoning code2. The districts include residence (R-1 through R-4), business, industrial and overlay districts, and the district map is kept at village hall6. The village also publishes an official zoning map for download10. Check which district a parcel sits in before you buy, because lot size is set district by district11. A new home on a lot created after the code took effect must meet the lot-size rule of its district, while a single-family home may be built on an older lot of record whatever its size if everything else in the code is met11. We could not confirm setbacks, height limits or minimum home size for the single-family district; ask the Village Hall12.

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

Yes. Construction inside Riverdale falls under the village's building code, and the village building and zoning department administers building permits1. The village adopts the International Building Code by reference, with its own amendments13. A building permit application is available on the village's forms page10. Call the Village Hall to start12. We could not confirm the permit fee schedule, which the code leaves to a village board ordinance, or whether owner-builders get any exemption. The county's building permit rules do not apply here: Cook County's department handles only unincorporated land5.

How do septic permits work inside Riverdale?

Most buyers will connect to sewer. A new home on a street or alley with a public sanitary sewer within 300 feet of the property line must connect within 90 days after official notice8. Where no public sewer is available, a private system needs a written permit signed by the village before construction starts14. The fee for a single-family home is $503. No permit is issued for a subsurface soil absorption system on a lot under 44,000 square feet, and the village health officer may add requirements7. The village may inspect at any stage15. Separately, Cook County's health department says it reviews and approves private systems throughout the county, with four named exceptions that do not include Riverdale4. We could not confirm how the village and county reviews fit together, so call both1216.

Can you live in an RV or tiny home in Riverdale?

We could not confirm the village's rules for RV living, temporary camping, tiny homes or accessory dwellings; ask the Village Hall before buying12. Do not rely on Cook County's rule. Its ban on living in a parked RV covers unincorporated Cook County only17. For land outside village limits, see the Cook County page.

What are the steps to build a home in Riverdale, in order?

  1. Confirm the parcel's zoning district on the official zoning map or at village hall6.
  2. Ask whether a public sewer is within 300 feet of the lot8; if not, a private system needs a village permit, and a soil absorption system needs a lot of at least 44,000 square feet7.
  3. Apply for the building permit with the village building and zoning department1.
  4. Arrange septic review with the village and Cook County's health department if you will not be on sewer4.
  5. Book inspections before covering any underground septic work15.

What stays with Cook County, and what should you check before buying in Riverdale?

Cook County's health department is the septic and well authority named for most of the county4. Private wells need state-required permits for construction, modification or sealing18. We could not confirm floodplain rules; the village has a floodplain ordinance to ask about12. Property taxes run at the county level: Cook County's effective property tax rate is about 2%9, with a median bill of $6,053 a year19.

Watch-outs

  • Village septic permits and Cook County health department approval may both apply; we could not confirm how they work together, so ask the Village Hall and the Cook County Department of Public Health before you buy14.
  • A soil absorption septic system is not permitted on a lot under 44,000 square feet inside Riverdale7.
  • Rules for RVs, tiny homes, accessory dwellings and building permit fees were not confirmed; get them in writing from the village before closing12.

Sources

  1. Chapter 15.02 Building Codes and Standards, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  2. Chapter 17.06 Zoning Districts, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  3. Chapter 13.20 Sewers, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  4. Septic, quoted and re-checked
  5. Building and Zoning, quoted and re-checked
  6. Chapter 17.06 Zoning Districts, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  7. Chapter 13.20 Sewers, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  8. Chapter 13.20 Sewers, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  9. Effective property tax rate: Bolthole Index county data
  10. Village of Riverdale forms and applications (villageofriverdale.net)
  11. Chapter 17.04 General Provisions, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  12. Village of Riverdale Village Hall (villageofriverdale.net)
  13. Chapter 15.02 Building Codes and Standards, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  14. Chapter 13.20 Sewers, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  15. Chapter 13.20 Sewers, Village of Riverdale, IL (eCode360) (Village of Riverdale), quoted and re-checked
  16. Cook County Department of Public Health - Environmental Health (cookcountypublichealth.org)
  17. 25-0036 Full Text PDF, quoted and re-checked
  18. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  19. Median property tax bill: 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 Village of Riverdale

Village of Riverdale’s own rules

  • Building permitRequired

    Construction inside Riverdale village governed by the village building code (Chapter 15.02)

    • Building permit is administered by the village building and zoning department.
    • A building permit is referenced in code enforcement (suspension or revocation of building permit).
    • Electrical and plumbing permit requirements in Chapter 15.02 were not verified verbatim.
    “section 105, permits. a. section 105.2. delete numbers 1, 2, and 6 under building section.”
  • Building code adoptedAdopted (with conditions)

    Building construction inside Riverdale village under Chapter 15.02 (the International Building Code as amended by the village)

    • Village amendments apply (for example, the code official may require additional documentation for unique construction).
    • Edition year and the complete adoption sentence were seen only in search snippets and were not verified verbatim on the page; check the adoption subsection before relying on the edition.
    “the model codes hereinafter set forth are hereby adopted by reference and made a part of this village code, as amended. a. the international building code, 2021 edition;”
  • Local zoningPresent (with conditions)

    Land inside Riverdale village limits: the village administers its own zoning code (Title 17), which applies to parcels within the village.

    • Title 17 zoning code is the village's own adopted ordinance; it governs use and bulk for land inside village limits.
    • Zoning district map is maintained at village hall (see zoning_districts claim).
    “for the purposes of this title, the village is hereby divided into the following zoning districts:”
  • Zoning districtsPublished

    Zoning districts of Riverdale village (CR, R-1 through R-4, B-1 through B-4, I-1, I-2, NOD overlay).

    • The district list is published in § 17.06.010; the map is kept at village hall per § 17.06.020(c).
    “c. the current zoning district map shall be available in village hall.”
  • Minimum lot sizeDistrict specific (with conditions)

    New residential lots inside Riverdale village limits (R-1 Single-Family Residence and other residence districts). Numeric R-1 minimum lot area not yet verified.

    • Lot area is set per district under § 17.04.050; the numeric R-1 figure is in Chapter 17.07, not reviewed.
    • A single-family dwelling may be built on a lot of record that existed on the effective date of the title regardless of size, if all other title requirements are met.
    • Where two or more contiguous substandard recorded lots are in common ownership and together form at least one conforming zoning lot, they must be joined (text truncated in capture).
    “every residential building hereafter erected on a lot or parcel of land created subsequent to the effective date of this title shall provide a lot or parcel of land in accordance with the lot size requirement of the district within which it is located.”
  • Who permits septicLocal (with conditions)

    Private sewage disposal systems inside Riverdale village

    • The village signs the written permit before construction starts (§ 13.20.030(b)).
    • The village health officer may impose additional requirements (§ 13.20.030, last clause before (h)).
    • Whether the county or state health department also reviews systems was not confirmed in the code text reviewed.
    “before commencement of construction of a private sewage disposal system, the owner shall first obtain a written permit signed by the village.”
  • Septic permitRequired

    Any private sewage disposal system built inside Riverdale village

    • Permit is obtained from the village before construction; a permit does not take effect until installation is completed to the village's satisfaction.
    • Fee: single-family home $50 (see permit_fees claim).
    “before commencement of construction of a private sewage disposal system, the owner shall first obtain a written permit signed by the village.”
  • Septic inspectionRequired

    Private sewage disposal systems built inside Riverdale village

    • Village representative may inspect at any stage of construction.
    • Applicant must notify the village when the work is ready for final inspection, and before any underground portions are covered.
    • Village inspection is to be made within two working days (as stated in the code).
    “the village representative shall be allowed to inspect the work at any stage of construction”
  • Off-grid sanitationLimited

    Homes inside Riverdale village where no public sanitary sewer is available under § 13.20.020(d)

    • A private sewage disposal system is allowed only with a written village permit, and only if it complies with § 13.20.030.
    • No permit is issued for a subsurface soil absorption system on a lot under 44,000 square feet.
    • No septic tank or cesspool may discharge to a natural outlet.
    • No statement in § 13.20.030 interferes with additional requirements the village's health officer may impose.

    minimum lot area for subsurface soil absorption permit: >= 44000 square feet

    “no permit shall be issued for any private sewage disposal system employing subsurface soil absorption facilities where the area of the lot is less than forty-four thousand square feet”
  • Mandatory utility hookupSewer (with conditions)

    A new home inside Riverdale village that abuts a street or alley with a public sanitary sewer located within 300 feet of the property line

    • Connection is required within ninety days after official notice to the owner, only where the public sewer is within 300 feet of the property line (§ 13.20.020(d)).
    • If no public sewer is available under § 13.20.020(d), the building sewer goes to a private system under § 13.20.030.
    • Water connection requirements were not checked in this research.

    public sewer distance threshold: <= 300 feet · connection deadline after official notice: 90 days

    “within ninety days after date of official notice to do so; provided, that said public sewer is within three hundred feet (ninety-one and four-tenths meters) of the property line.”
  • Subdividing landRegulated (with conditions)

    Division of land inside Riverdale village

    • Title 16 governs development and subdivision; the chapter-level provisions were not read.
    “title 16 development and subdivision regulations”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Village of Riverdale or Cook County directly.

  • Owner-builder exemption — Owner-builder construction inside Riverdale village
  • Certificate of occupancy — New dwellings built inside Riverdale village
  • Minimum dwelling size — Single-family dwellings in the R-1 district inside Riverdale village
  • Setbacks — Main single-family residence district (R-1 Single-Family Residence) inside Riverdale village
  • Lot coverage — Main single-family residence district (R-1 Single-Family Residence) inside Riverdale village
12 more unanswered
  • Building height
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • 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 Village of Riverdale publishes no rule on the point, not that none exists. Cook County’s page lists the county offices to call.

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