City Building Permits

Monticello, ILLINOIS Building Permit Guide

How to apply for a building permit in Monticello, Illinois. Permit authority, application steps, fees, and inspection requirements.

Illinois Piatt County Updated March 2026

Permit Authority

City of Monticello corporate limits. Monticello is the county seat of Piatt County. Unincorporated areas fall under Piatt County Zoning.

Department
Building Inspection and Zoning Division
Address
210 N. Hamilton, Monticello, IL 61856
Phone
(217) 762-2583
Website
https://www.cityofmonticello.net/956/Building-Inspection-Zoning

Online Permit Portal

Open Building Permits

Platform: Paper application • Account required: No • Submission: In-person only

Application Process

  1. Discuss the project with the City Building Inspector to confirm zoning compliance.
  2. Prepare two copies of a site plan and construction plans drawn to scale, including lot dimensions, location and size of all existing and proposed buildings, driveway locations, off-street parking, intended use descriptions, and number of dwelling units if applicable.
  3. For commercial new construction and remodels, provide engineered drawings. Change-of-occupancy projects also require engineered drawings.
  4. Properties in the Historic District require approval from the Historic Design Review Board before a building permit is issued.
  5. Submit application and plans in person to City Hall (210 N. Hamilton) or electronically to taj@cityofmonticello.net.
  6. For simple permits (fences, decks, sheds), permit is typically issued same day or next working day.
  7. Complex projects may take up to two weeks for review.
  8. Permit is issued; post on job site and schedule required inspections.

Typical processing time: Same day to next working day for simple permits; up to two weeks for complex projects.

Source: Building Inspection and Zoning Division

General Requirements

New construction; building additions; decks, porches, patios; fencing; in-ground pools; detached structures (garages, sheds); signs; ground-mounted solar installations.

Required Documents

  • Completed building permit application form
  • Two copies of site plan drawn to scale
  • Construction plans drawn to scale
  • Engineered drawings for commercial projects and changes of occupancy
Permit validity
New residential construction: 1 year from issuance. Commercial new construction: 2 years from issuance. All other permits: 6 months from issuance. Extensions up to 90 days may be granted in writing by the Building Inspector.
Building code
Per Illinois PA 103-0510 (effective January 1, 2025), minimum standards are IBC 2021, IRC 2021, IEBC 2021, NEC 2023, Illinois Energy Conservation Code, Illinois Accessibility Code, and Illinois Plumbing Code. Monticello historically adopted 2003 IBC, IRC, 2005 NEC, 2004 Illinois Plumbing Code. Confirm current locally-adopted edition with the Building Inspector.
Owner-builder
Contact the Building Inspector for owner-builder requirements.
Contractor requirements
No Illinois state general contractor license. Electricians must hold an IDFPR license. Plumbers must hold an IDFPR license.

Fees

Minimum permit fee
$50 (for garages, decks, sheds, additions)
Permit fee formula
Not publicly documented in full. Based on city budget references: approximately $1,800 for new single-family home construction; $50 for garages, decks, patios, and additions.
Penalty (no permit)
Failure to obtain permit before starting work is a code violation; Building Inspector has authority to require work stoppage.
Payment note
Payment made to City of Monticello. Checks and cash accepted; confirm whether credit cards are accepted.

Work That Does NOT Require a Permit

  • Interior renovations and remodeling (unless structural or involving change of occupancy for commercial)
  • Roof repairs or replacement (non-structural)
  • Window and door replacements (in-kind, no structural change)
  • HVAC system service (maintenance, not installation of new systems)
  • Driveways (permit not required, but inspection of approach between property line and street edge required before placement)
  • Rooftop-mounted solar panels

Inspections

How to Schedule

  • (217) 762-2583 (phone)
Inspection hours
Monday through Friday during City Hall business hours

Typical inspection sequence: For new construction, inspections required at key phases (footing/foundation, framing, rough MEP, insulation, final). For smaller projects, typically final inspection only.

Additional Resources

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Building Inspection and Zoning Division before applying.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.

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