HB3552 creates the Local Accessory Dwelling Unit Act, which would bar local governments in Illinois from prohibiting accessory dwelling units (ADUs) on lots with existing or proposed single-family or multi-family homes. The bill defines ADUs broadly to include attached or detached units with independent living facilities, including efficiency units and manufactured homes, and allows local governments to adopt only reasonable size and location regulations so long as those rules do not effectively block ADUs.
The bill also establishes a streamlined approval process for ADU permits. Local governments would have to approve or deny a completed application by right and without discretionary review, generally within 60 days, and if they fail to act in time the application would be deemed approved. If an application is denied, the local government must provide written comments identifying deficiencies and explaining how the applicant can fix them. The bill further prohibits denial based solely on certain existing nonconforming zoning conditions, building code violations, or unpermitted structures that do not pose a public health or safety threat and are unrelated to the ADU project.
Impact
If enacted, HB3552 would significantly limit municipal and county zoning authority over ADUs and would preempt inconsistent home rule regulations. It would require local governments to revise ordinances, permitting procedures, and review standards to allow ADUs and to process applications under a mandatory, time-limited, largely ministerial review framework. The bill would affect property owners, developers, tenants, and local planning and building departments by making ADU construction more accessible and predictable while constraining local discretion.
Sentiment
No committee transcripts or recorded votes were provided, so there is no direct evidence of legislative debate or formal support/opposition in the available materials. Based on the bill text alone, the measure appears designed to promote housing supply and expand residential flexibility, suggesting a generally pro-housing policy approach. The absence of voting history or discussion prevents a reliable assessment of broader political sentiment.
Contention
The main points of contention are likely to be local control versus statewide housing policy. Local governments may object to the bill’s limits on zoning discretion, its ban on off-street parking requirements, its deemed-approved provision, and the restriction on denying permits because of unrelated code or zoning nonconformities. Supporters would likely favor the bill for reducing barriers to ADU construction, increasing housing options, and standardizing permit review across jurisdictions.