Rock Island County, IL — 2026 Building Permit Guide

On this page 6

§ 01

Permit authority

Rock Island County Zoning and Building Safety Department

Street address

1504 Third Avenue, Room 305, Rock Island, IL 61201

Phone

309-558-3771

gthorpe@ricountyil.gov

Coverage

All areas in Rock Island County outside of incorporated municipalities.

Online portal

County Downloads

N/A (PDF Download)

Website

Department website

§ 02

When a permit is required

Permit triggers and exempt work for Rock Island County

New construction, additions, remodels, decks, garages, fireplaces, systems, roofing, siding, and windows.

Scope of work

Permit?

Accessory structures 120 sq ft or less (70 sq ft in floodplain)

Exempt

Fences 6 feet or less (zoning approval still required)

Exempt

Retaining walls 4 feet or less

Exempt

Cosmetic work: painting, papering, tiling, carpeting

Exempt

Prefabricated pools less than 18 inches deep

Exempt

Window awnings projecting less than 54 inches

Exempt

Playground equipment

Exempt

Exempt Accessory structures 120 sq ft or less (70 sq ft in floodplain)
Exempt Fences 6 feet or less (zoning approval still required)
Exempt Retaining walls 4 feet or less
Exempt Cosmetic work: painting, papering, tiling, carpeting
Exempt Prefabricated pools less than 18 inches deep
Exempt Window awnings projecting less than 54 inches
Exempt Playground equipment

Note: Floodplain overlay along the Mississippi River is significant; FEMA Special Flood Hazard Areas apply to many riverfront parcels. Always confirm requirements before proceeding.

Required documents

Application
Site plan
Construction plans
Septic/well approval (if applicable)

Building code: 2012 IBC, 2012 IRC, 2011 NEC, Illinois Plumbing Code
Owner-builder: Permitted for primary residence.
Contractor requirements: Must register annually with County ($10,000 bond).

Source: Rock Island County Zoning and Building Safety Department ↗

§ 03

Application process

Typical processing: 2 weeks

01

Download application from County website.
02

Submit application, site plan, and construction drawings.
03

Department reviews for zoning, code, and floodplain compliance.
04

Pay fees at County office.
05

Permit issued.

Typical processing time: 2 weeks

Source: Rock Island County Zoning and Building Safety Department ↗

§ 04

Fee schedule

Rock Island County building permit fees

Fee type

Amount

Minimum permit fee

Valuation-based scale

Plan check fee

Included

Permit fee formula

Valuation-based; Plumbing $12 per opening

Trade permit fee

Included in valuation-based scale

Penalty (no permit)

Double fee for work starting without permit

Cash or check only

Fees change periodically. Confirm at the official fee schedule ↗ before budgeting.

§ 05

Required inspections

Scheduling and sequence

How to schedule

309-558-3771 (phone)

Scheduling deadline: Contact for details
Inspection hours: Monday - Friday; Inspectors in field 10:00 AM - 3:00 PM
Time windows: 10:00 AM - 3:00 PM

Typical sequence: Typical sequence: Footing/Foundation, Rough-in (Electric, Plumbing, HVAC), Insulation, Final

Source: Rock Island County Zoning and Building Safety Department ↗

§ 06

Frequently asked

Common questions about unincorporated Rock Island County permits

01 Do I need a building permit in unincorporated Rock Island County, IL? ▸

New construction, additions, remodels, decks, garages, fireplaces, systems, roofing, siding, and windows.

02 How much does a building permit cost in unincorporated Rock Island County, IL? ▸

Building permit fees in unincorporated Rock Island County, IL are set by the local building department and vary by project type and valuation. The minimum permit fee is Valuation-based scale. Fees are calculated as: Valuation-based; Plumbing $12 per opening. Plan check fee: Included.

03 How do I apply for a building permit in unincorporated Rock Island County, IL? ▸

To apply for a building permit in unincorporated Rock Island County, IL, follow these steps: 1. Download application from County website. 2. Submit application, site plan, and construction drawings. 3. Department reviews for zoning, code, and floodplain compliance. 4. Pay fees at County office. 5. Permit issued.

04 How long does it take to get a building permit in unincorporated Rock Island County, IL? ▸

Building permit processing times in unincorporated Rock Island County, IL typically run 2 weeks. Timelines can vary based on project complexity and current department workload.

05 What work is exempt from building permits in unincorporated Rock Island County, IL? ▸

Not all construction work requires a permit in unincorporated Rock Island County, IL. The following work is generally exempt: Accessory structures 120 sq ft or less (70 sq ft in floodplain); Fences 6 feet or less (zoning approval still required); Retaining walls 4 feet or less; Cosmetic work: painting, papering, tiling, carpeting; Prefabricated pools less than 18 inches deep; Window awnings projecting less than 54 inches; Playground equipment. Note: Floodplain overlay along the Mississippi River is significant; FEMA Special Flood Hazard Areas apply to many riverfront parcels. Always confirm requirements before proceeding. When in doubt, confirm with the local building department before starting work.

06 How do I schedule a building inspection in unincorporated Rock Island County, IL? ▸

Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Rock Island County, IL via: 309-558-3771. Contact for details.

last verified April 2026 source Rock Island County Zoning and Building Safety Department ↗ entry id permits/illinois/rock-island/unincorporated

Report a correction

Educational reference. Permit rules and fees change — confirm current requirements directly with Rock Island County Zoning and Building Safety Department before applying. Jaspector is not legal advice.

Unincorporated Rock Island County