Bolthole Index

Will County, Illinois

Building permits, zoning and septic in the Village of Mokena, Illinois

The Village of Mokena, Illinois requires building permits for most construction, including work done by homeowners.1 Mokena’s Community Development Department is the village contact for building applications and its zoning ordinance; Will County Health Department administers private sewage systems in Will County.123

At a glance

Building permits
Required for construction and many alterations, repairs and site-development projects.4
Zoning
Village zoning ordinance; request the complete ordinance from Community Development.2
Septic
Will County Health Department Private Sewage Program; plan approval before construction.35
Inspections
Call the village building department 48 hours ahead, excluding weekends and holidays.6
Occupancy
Village occupancy certificate required for new homes and other covered construction.7
Owner-built projects
Homeowners also need building permits for most construction.1

Who to call

Building permits

Village of Mokena — Community Development Department

Village building applications and project-specific building permit questions

(708) 479-3900

11004 Carpenter Street Mokena, IL 60448

Zoning

Village of Mokena — Community Development, Zoning

Village zoning ordinance and zoning map inquiries

(708) 479-3900

11004 Carpenter Street Mokena, IL 60448

Septic permits

Will County Health Department — Private Sewage Program (Joliet Main Office)

Private sewage disposal (septic) system construction permits and inspections for Will County; also handles private well permits

815-727-8490

501 Ella Avenue Joliet, IL 60433

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

Going off-grid in Village of Mokena means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in the Village of Mokena, IL?

Mokena requires a building permit before construction, alteration, demolition, excavation, general grading and other covered site development begins.4 Ordinary maintenance can be exempt, but the village excludes reroofing, siding replacement, window replacement, water-heater replacement, accessory structures and concrete flatwork from that maintenance category.4 A homeowner doing the work still needs a building permit for most construction projects.1 Ask Community Development about an unlisted project before starting work.1

Who issues building permits in the Village of Mokena?

Start a Mokena building application with the village’s Community Development Department, which directs applicants to BS&A Online and also accepts applications in person or by mail.1 Each application must contain the supporting documents required for that project type; incomplete applications are not accepted for review.1 Mokena’s application rules generally require 2 survey plats and architect- or engineer-sealed plans, with specified discretion for the building official.8 Village plan approval and payment of required fees precede building permit issuance.8

Does the Village of Mokena have zoning and setback rules?

Mokena publishes a village zoning map and directs readers to Community Development for the complete village zoning ordinance.2 Ask that office to identify the parcel’s district and provide the applicable residential requirements before choosing a house footprint.2 We could not confirm Mokena’s district-specific minimum lot area, setbacks, minimum dwelling size, height or lot coverage; request those answers from Community Development.2 For land outside village limits, use the Will County guide: the county zoning ordinance applies to unincorporated Will County.9

How do septic permits and wells work inside the Village of Mokena?

Will County Health Department’s Private Sewage Program administers septic review, permitting and inspections in Will County, separate from Mokena’s building application.3 Illinois requires private sewage plan approval from IDPH or the applicable local authority before construction begins.5 New and repaired wells and septic systems receive county inspections.10 Illinois also requires a permit before covered well construction, deepening, modification or sealing.11 We could not confirm Mokena’s public water or sewer connection requirements; ask village Community Development about the address before arranging a private system.1

Can you live in an RV or tiny home in the Village of Mokena?

We could not confirm whether Mokena allows residential RV occupancy, temporary camping, tiny-home occupancy or an accessory dwelling on a private lot; take the proposed use and parcel to village Community Development for a zoning answer.2 A new or moved structure covered by Mokena’s occupancy rules needs a village occupancy certificate before use.7 Illinois rules for manufactured-home installation also leave local zoning, building, floodplain and utility requirements applicable.12 Ask for separate answers about the proposed dwelling type and any temporary accommodation during construction.2

What are the steps to build a home in the Village of Mokena?

  1. Ask Community Development for the parcel’s village zoning map designation and complete zoning requirements.2
  2. Resolve water and wastewater service with the village and, if a private system is proposed, obtain sewage plan approval from the applicable health authority before construction.15
  3. Submit the building application, survey plats and required plans; obtain village approval and pay required fees before building permit issuance.8
  4. Call the village building department 48 hours before inspections, excluding Saturdays, Sundays and holidays; keep inspection areas uncovered.6
  5. Complete the final inspection and obtain the village occupancy certificate before moving in.67

What should you check before buying land in the Village of Mokena?

Mokena’s building rules require a written permit before driveway construction or maintenance across a public walk, parkway or curb.13 Development in village floodplain areas also falls under Mokena’s floodplain permitting requirements.14 Ask Community Development to review the access and floodplain implications alongside the proposed house site.1 At the county scale, only 0.2% of Will County soils rate “not limited” for conventional septic drain fields; that calls for a site evaluation, rather than a conclusion that septic is impossible.15 Treat private-system feasibility as a parcel question for Will County Health Department.3

Watch-outs

  • Mokena’s temporary occupancy certificate lasts no more than 6 months and requires a $5,000 bond per single-family dwelling unit.7
  • We could not confirm Mokena’s current building permit fee amounts or RV living rules; ask Community Development before budgeting construction or temporary accommodation.12

Sources

  1. Village of Mokena — Community Development Department (mokena.gov)
  2. Village of Mokena — Community Development, Zoning (mokena.gov)
  3. Wells and Septic Systems | Will County Health Department, quoted and re-checked
  4. 8-1-4: Permit Requirements (Village of Mokena), quoted and re-checked
  5. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  6. 8-1-5: Inspections (Village of Mokena), quoted and re-checked
  7. 8-1-7: Certificates of Occupancy (Village of Mokena), quoted and re-checked
  8. 8-1-4: Permit Requirements (Village of Mokena), quoted and re-checked
  9. Will County Code § 155-1.40 Applicability and Jurisdiction, quoted and re-checked
  10. Private Well and Septic Program, quoted and re-checked
  11. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  12. Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
  13. 8-1-4: Permit Requirements (Village of Mokena), quoted and re-checked
  14. 11-1-8: Permitting Requirements Applicable to All Floodplain Areas (Village of Mokena), quoted and re-checked
  15. 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

Written October 12, 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 Mokena

Village of Mokena’s own rules

  • Building permitRequired

    Erection, construction, alteration, repair, demolition, movement, site clearing, excavation, driveway work across public walks, general site grading, paving, and other general site development inside Mokena village.

    • Ordinary maintenance repairs may be exempt, but structural, egress, utility, safety, reroofing, re-siding, re-paving, demolition, accessory structures, window replacement, water-heater or water-softener replacement, concrete flatwork, fireplaces, wood stoves, and central air conditioning are excluded from ordinary maintenance.
    “Building Permit Required: No person shall begin”
  • InspectionsRequired

    Permitted construction and occupancy work inside Mokena village.

    • Owner or contractor must call 48 hours in advance, excluding Saturdays, Sundays, and holidays; no work may cover or obstruct scheduled inspection areas; a final inspection precedes temporary or permanent occupancy certification.

    inspection notice: 48 hours (excluding Saturdays, Sundays and holidays)

    “The owner or contractor is required to call the building department forty eight (48) hours in advance”
  • Certificate of occupancyRequired

    New, moved, remodeled, reconstructed, or reclassified structures, additions, and uses inside Mokena village.

    • The premises must be completed and inspected; landscaping permit and, for subdivision or lot-division property, stormwater detention, underground utilities, streets to binder course, street signs, and streetlights are required. A temporary certificate may last no more than six months and requires a bond.

    temporary occupancy certificate maximum duration: <= 6 months · single-family temporary occupancy bond: 5000 USD per dwelling unit

    “unless an occupancy certificate shall first have been obtained from the Village”
  • Driveway accessRequired

    Construction or maintenance of a driveway in or across a public walk, parkway, or curb inside Mokena village limits.

    • A written permit must be obtained before the work begins.
    “construct or maintain any driveway in or across”
  • Building in a floodplainRequired

    Development in floodplain areas inside Mokena village limits.

    • Title 11 contains permitting requirements applicable to all floodplain areas; detailed floodway and flood-fringe conditions were not fully extracted.
    “PERMITTING REQUIREMENTS APPLICABLE TO ALL FLOODPLAIN AREAS”
  • Permit processPublished (with conditions)

    Building permit applications inside Mokena village limits.

    • Applications must identify applicant and owner; generally two survey plats are required, subject to hardship waiver; plans ordinarily require Illinois-licensed architect or engineer seals, subject to building-official discretion; village approval and payment of required fees precede issuance.

    survey plats: 2 copies (may be waived at building official discretion for undue hardship or impracticality)

    “Upon approval of the application and plans by the building official a building permit may be prepared for issuance. No such permit shall be issued except after village approval of the plans and applicant's payment in full of any required fees to village.”

Still unanswered

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

  • Owner-builder exemption — Owner-builders inside Mokena village limits.
  • Minimum dwelling size — Minimum dwelling size inside Mokena village limits.
  • Minimum lot size — Minimum lot size inside Mokena village limits.
  • Setbacks — Setbacks inside Mokena village limits.
  • Lot coverage — Lot coverage inside Mokena village limits.
15 more unanswered
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • 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 Village of Mokena publishes no rule on the point, not that none exists. Will County’s page lists the county offices to call.

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