IllinoisSB4071104th General Assembly (2025–2026)Senate

MUNI CD-ACCESSORY DWELLINGS

Sponsored By: Robert F. Martwick (Democratic)

In Committee

Summary

Amends the Illinois Municipal Code. Provides that, beginning January 1, 2027, each municipality shall, by ordinance, authorize the development of accessory dwelling units. Provides that each municipality shall permit accessory dwelling units in all zoning districts that permit single-family dwellings without additional requirements for lot size, setbacks, aesthetic requirements, design review requirements, frontage, space limitations, or other controls beyond those required for single-family dwelling units without an accessory dwelling unit. Provides that a municipality is not required to allow more than one accessory dwelling unit for any single-family dwelling. Provides that accessory dwelling units may be constructed at the same time as the principal dwelling unit. Provides that no municipality shall: (A) require additional automobile parking spaces for a property with an accessory dwelling unit beyond the requirements for a single-family dwelling unit without an accessory dwelling unit; (B) require the establishment of a familial relationship between the occupants of an accessory dwelling unit and the occupants of a principal dwelling unit; or (C) establish a minimum or maximum limit on (i) square footage of an accessory dwelling unit or (ii) the number of bedrooms of an accessory dwelling unit. Limits home rule powers.

assignments

Personalized for You

How does this bill affect your finances?

Personalize government policy and PRIA will tell you what this bill means for your household, plus every other piece of legislation we track. PRIA reads each provision against your financial profile to show you exactly what matters to your wallet.

Bill Overview

No Economic Impacts Identified for this Bill

Sponsors & Cosponsors

Sponsor

  • Robert F. Martwick

    Democratic • Senate

Cosponsors

  • Adriane L. Johnson

    Democratic • Senate

  • David Koehler

    Democratic • Senate

  • Javier L. Cervantes

    Democratic • Senate

  • Mark L. Walker

    Democratic • Senate

  • Mattie Hunter

    Democratic • Senate

  • Robert Peters

    Democratic • Senate

  • Sara Feigenholtz

    Democratic • Senate

  • Steve Stadelman

    Democratic • Senate

Roll Call Votes

No roll call votes available for this bill.

Actions Timeline

  1. Added as Co-Sponsor Sen. Steve Stadelman

    3/13/2026Senate
  2. Added as Co-Sponsor Sen. Robert Peters

    3/10/2026Senate
  3. Added as Chief Co-Sponsor Sen. Javier L. Cervantes

    3/6/2026Senate
  4. Added as Chief Co-Sponsor Sen. Adriane L. Johnson

    3/6/2026Senate
  5. Added as Chief Co-Sponsor Sen. Mattie Hunter

    3/6/2026Senate
  6. Added as Co-Sponsor Sen. Sara Feigenholtz

    3/5/2026Senate
  7. Added as Co-Sponsor Sen. Mark L. Walker

    3/5/2026Senate
  8. Added as Chief Co-Sponsor Sen. David Koehler

    3/5/2026Senate
  9. Referred to Assignments

    2/24/2026Senate
  10. First Reading

    2/24/2026Senate
  11. Filed with Secretary by Sen. Robert F. Martwick

    2/24/2026Senate

Bill Text

Related Bills

Back to State Legislation