Bolthole Index

Rock Island County, Illinois

Building permits, zoning and septic rules in Silvis, Illinois

Silvis, Illinois handles building-permit applications through the city Inspections Department and administers its own zoning inside city limits.12 Rock Island County Health Department handles private sewage disposal where municipal sewer service is unavailable.3 Camping and travel trailers cannot be occupied temporarily or permanently inside Silvis except in an authorized mobile-home park.4

At a glance

Building permits
Apply through Silvis Inspections Department; city construction codes apply.15
Zoning
Silvis has its own zoning chapter and zoning map.26
Septic
Rock Island County Health Department administers private sewage disposal where municipal sewer is unavailable.3
RV living
Camping and travel trailer occupancy is prohibited outside an authorized mobile-home park, including temporary occupancy.4
Mobile homes
Occupancy is limited to authorized mobile-home parks.7
Owner-builder
The city application allows a property owner to apply; that does not establish a permit or code exemption.18

Who to call

Building permits

City of Silvis Inspections Department

City building-permit applications and construction inspections; ask for the city zoning officer for parcel-specific zoning questions.

(309) 314-2404

[email protected]

Silvis City Hall, 121 11th Street Silvis, IL, 61282

Building permits

City of Silvis Building Permit Application

Project information, valuation, subcontractor and construction details for city building-permit applications.

121 11TH STREET, SILVIS, IL 61282

Septic permits

Rock Island County Health Department

Private sewage disposal consultations and inspections; private drinking-water sampling and inspections.

(309) 793 - 1955

2112 25th Ave. Rock Island, Illinois 61201

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

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

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

Do you need a building permit in Silvis, Illinois?

Silvis has a city building-permit application covering new construction, additions and remodeling, garages and sheds, roofing, siding, windows and doors, and other project details.1 Silvis has adopted the 2015 International Building Code with local amendments.5 Ask the city Inspections Department which building and trade applications your project needs before work begins.

A property owner can apply on the Silvis form, but the applicant must certify compliance with applicable codes and take responsibility for applicable inspections.19 We could not confirm a Silvis owner-builder exemption; ask the city inspector rather than assuming that doing the work yourself removes building-permit requirements.

Who handles Silvis building permits and inspections?

The Silvis Inspections Department receives the city building-permit application at City Hall.1 The city inspector lists phone (309) 314-2404 and email [email protected] on the municipal inspections page.10 The city inspector’s office hours are Monday through Friday, 8:00–9:00 am and noon–1:00 pm; appointments outside regular hours can be arranged through 309-792-9181.10

Silvis applicants must supply the project address, proposed work, valuation, subcontractors and construction details.1 The permit holder must contact the Inspections Department for applicable inspections when work is complete.11 Ask the inspector for the project’s inspection schedule, building-permit fee and occupancy sign-off requirements; we could not confirm a general city certificate-of-occupancy requirement.

Does Silvis have zoning, lot-size rules and setbacks?

Silvis administers its own zoning chapter, and the zoning map and its amendments are part of that chapter.26 Ask the city zoning officer to identify the parcel’s zoning district and confirm the proposed dwelling or accessory use before you commit to a design.

We could not confirm Silvis district-specific minimum lot sizes, setbacks, building heights, lot coverage or minimum dwelling sizes; request those standards from the city zoning officer for the actual parcel. Rock Island County’s zoning department has authority over unincorporated properties rather than land inside Silvis.12 For land outside the city, use the Rock Island County guide and confirm jurisdiction with the county department.12

How do septic permits work inside Silvis?

Rock Island County Health Department administers private sewage disposal for properties without current access to municipal sewer service, including its consultations and inspections.3 In new Silvis subdivisions, city sewer service is the default: all lots must connect to the city sanitary sewer system unless an exception is granted.13 Approved individual septic systems are among the subdivision exceptions when public sewer is unavailable; septic is not an automatic alternative to a sewer connection.13

Illinois requires plan approval from the applicable authority before a new private sewage system is constructed, and notification at least 48 hours before work starts.14 For covered septic systems in Silvis, septic tanks require evaluation within the first 3 years and every 5 years thereafter; aerobic treatment units need service and evaluation every 6 months.15

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

Silvis prohibits temporary and permanent occupancy of camping and travel trailers outside a mobile-home park authorized by the city code.4 Permission to park or store a trailer is not permission to sleep in the trailer while building a home.4 On residential lots, the trailer rule permits no more than 1 camping, travel or hauling trailer per family and limits dimensions to 24 feet long and 8 feet wide.4

Silvis also prohibits mobile-home occupancy outside an authorized mobile-home park, and restricts mobile-home parking or storage to a park or sales area.7 We could not confirm a separate Silvis tiny-home or accessory-dwelling rule; ask the city zoning officer how the proposed structure will be classified before buying a unit.

What are the steps to building a home in Silvis?

  1. Ask the Silvis zoning officer to identify the parcel’s district and confirm the intended use, lot dimensions and setbacks against the city zoning map.6
  2. Confirm sewer availability with the city; for a new subdivision, city sewer connections are required unless an exception is granted.13 Where sewer is unavailable, discuss private sewage disposal with Rock Island County Health Department before preparing a septic design.3
  3. Prepare the Silvis building-permit application with project information, valuation, subcontractors and construction details; ask the inspector about fees and required approvals.1
  4. Arrange the applicable city inspections and ask the inspector what final approval is needed before moving in.11

For a proposed private well, Illinois requires a permit before construction, modification or sealing from IDPH or an approved local health department.16 Ask Rock Island County Health Department how that requirement applies to the Silvis address and whether municipal water service is available.17

Watch-outs

  • Silvis camping and travel trailer occupancy is prohibited even temporarily outside an authorized mobile-home park; do not plan to live in a parked trailer during construction.4
  • Silvis subdivision sewer requirements allow exceptions, but installing septic requires the appropriate approval rather than simply choosing to disconnect from city sewer service.1314
  • We could not confirm Silvis driveway-approach approval, agricultural exemptions or district-specific dwelling-size standards; ask the city inspector and zoning officer before buying or drawing plans.102

Sources

  1. City of Silvis Building Permit Application (Silvis), quoted and re-checked
  2. Silvis Code, Sec. 102-227, Zoning map (Silvis), quoted and re-checked
  3. Water and Sewage, quoted and re-checked
  4. Silvis Code, Sec. 102-14, Trailers and mobile homes (Silvis), quoted and re-checked
  5. Silvis Code, Sec. 22-31, Adopted (Silvis), quoted and re-checked
  6. Silvis Code, Sec. 102-227, Zoning map (Silvis), quoted and re-checked
  7. Silvis Code, Sec. 102-14, Trailers and mobile homes (Silvis), quoted and re-checked
  8. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  9. City of Silvis Building Permit Application (silvisil.org)
  10. City of Silvis Inspections Department (silvisil.org)
  11. City Building Inspector / Building Official (Silvis), quoted and re-checked
  12. Zoning & Building Safety, quoted and re-checked
  13. Silvis Code, Sec. 82-189, Sewage disposal (Silvis), quoted and re-checked
  14. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  15. Rock Island County Health Department Private Sewage Disposal Permit Application Signature Page (Silvis), quoted and re-checked
  16. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  17. Rock Island County Health Department (richd.org)

Written October 11, 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 Silvis

Silvis’s own rules

  • Building code adoptedAdopted

    Building regulation inside Silvis city limits.

    • The adopted document is the 2015 International Building Code, including listed appendix chapters and local amendments in Secs. 22-32—22-34.
    • Ordinance No. 2018-24 adopted May 20, 2018.

    code edition: International Building Code, 2015 edition

    “International Building Code, 2015 edition, including appendix chapters C, E, G, I and J, (see International Building Code Section 101.2.1 2015 edition), as published by the International Code Council, be and is hereby adopted as the Building Code of the City of Silvis, in the State of Illinois”
  • InspectionsRequired

    Construction under the City of Silvis building inspector's jurisdiction.

    • Inspections cover new construction, additions, renovations, alterations and repairs; the application directs the permit holder to contact the department for applicable inspections when work is complete.
    “it is my responsibility to contact the Inspections Department for applicable inspections when work is complete.”
  • Local zoningPresent

    Land inside Silvis city limits; Silvis adopts and administers its own zoning chapter.

    • The zoning map is part of Chapter 102.
    “The location and boundaries of the zoning districts established by this chapter are set forth on the map entitled "zoning map" which is a part of this chapter.”
  • Zoning districtsPublished

    Zoning districts inside Silvis city limits.

    • The zoning map is incorporated into Chapter 102 and includes amendments to the map.
    “The map, together with everything shown thereon and all amendments thereto, shall be as much a part of this chapter as though fully set forth and described in this chapter.”
  • Living in an RVLimited

    Camping and travel trailers parked or stored on residential lots or lots occupied by a dwelling inside Silvis city limits.

    • No more than one camping or travel trailer or hauling trailer per family is permitted.
    • Trailer may not exceed 24 feet in length or eight feet in width.
    • It may not be parked or stored more than two weeks unless behind the front-yard building line and ten feet from any dwelling.
    • It may not be occupied temporarily or permanently except in a mobile-home park authorized by the Code.

    maximum trailers per family: 1 trailer · maximum trailer length: <= 24 feet · maximum trailer width: <= 8 feet · storage period: <= 2 weeks (unless behind the front yard building line and ten feet from any dwelling)

    “A camping or travel trailer shall not be occupied either temporarily or permanently while it is parked or stored in any area within the incorporated limits except in a mobile home park authorized under this Code.”
  • Manufactured homesLimited

    Mobile/manufactured-home occupancy inside Silvis city limits.

    • A mobile home may be parked or stored only in a mobile-home park or mobile-home sales area.
    • It may not be occupied temporarily or permanently elsewhere inside the incorporated limits.
    “A mobile home shall be parked or stored only in a mobile home park or mobile home sales area. A mobile home shall not be occupied either temporarily or permanently while it is parked or stored in any area within the incorporated limits except in a mobile home park authorized under this Code.”
  • Mandatory utility hookupSewer (with conditions)

    New residential, commercial or industrial subdivisions inside Silvis city limits.

    • All lots must be served by sanitary sewers connected to the city sewer system unless an exception is granted.
    • Exceptions include another available public sewer, a feasible permitted community system, approved individual septic/subsurface systems when public sewer is unavailable, or an already approved sewage system.
    • Connections to city drains or sewers require city permission.
    “no residential, commercial, or industrial subdivision shall be approved unless all lots are served by sanitary sewers connected to the city sewer system.”
  • Permit processPartial

    Silvis building-permit application and inspection process.

    • Application is submitted to the Inspections Department at 121 11th Street, Silvis, Illinois 61282.
    • Office hours are Monday-Friday 8:00-9:00 AM and 12:00-1:00 PM or by appointment.
    • The applicant must provide project information, valuation, subcontractors and construction details, certify the information, and contact the department for applicable inspections when work is complete.
    “OFFICE HOURS: MON-FRI 8:00-9:00 AM, 12:00-1:00 PM or By Appointment”

Rules another office applies inside Silvis

Silvis does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Septic inspectionRequired

    Private sewage systems inside Silvis city limits subject to Rock Island County Health Department administration.

    • Septic tanks must be evaluated within the first three years and every five years thereafter.
    • Aerobic treatment units require evaluation and service every six months; sand filters require annual inspection.
    • Evaluations may be performed by a licensed septic installation contractor, Health Department sanitarian, engineer or homeowner.

    septic tank evaluation interval: 3 years initially · septic tank evaluation interval: 5 years thereafter · aerobic treatment unit service interval: 6 months · sand filter inspection interval: 1 year

    “In 2013, new laws were implemented that require maintenance to be performed on all wastewater treatment systems installed on properties in the state of Illinois.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Silvis or Rock Island County directly.

  • Owner-builder exemption — Owner-builder exemption from Silvis building-code or permit requirements.
  • Certificate of occupancy — Certificate-of-occupancy requirements inside Silvis city limits.
  • Minimum dwelling size — Residential districts inside Silvis city limits, including R-1 and R-2.
  • Minimum lot size — Residential districts inside Silvis city limits.
  • Setbacks — Residential districts inside Silvis city limits.
8 more unanswered
  • Lot coverage
  • Building height
  • Tiny homes
  • Accessory dwellings
  • Well permit
  • Agricultural exemption
  • Driveway access
  • Short-term rentals

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 Silvis publishes no rule on the point, not that none exists. Rock Island County’s page lists the county offices to call.

← All of Rock Island County: county rules, score and offices