Residential Open Space Overlay (ROSO) District
Encouraging Responsible Development While Preserving Cook County’s Natural Landscape
Expanding Housing While Preserving Cook County’s Natural Beauty
The Residential Open Space Overlay (ROSO) District is a zoning approach designed to support new housing opportunities in Cook County while protecting the natural beauty and open spaces that define the region. Established by Cook County Land Services and supported by the HRA, the ROSO District allows property owners and developers to create clustered housing developments that use land more efficiently, reduce infrastructure costs, and maintain large areas of shared natural space. This approach encourages growth where the community needs it most—without compromising the county’s cherished landscapes.
Program Overview
The goal of the ROSO District is to make it easier and more cost-effective to build housing in Cook County while balancing environmental stewardship. Through this zoning framework, qualified properties may develop multiple homes within a smaller footprint, preserving a significant portion of the land as open space. This provides flexibility for property owners and developers, supports attainable housing options, and ensures that new development aligns with Cook County’s long-term land use and conservation priorities.
Key features of the ROSO District include:
- Cluster Housing Development: Homes can be grouped together to reduce infrastructure needs and environmental impact.
- Protected Open Space: A portion of each property remains undeveloped to preserve natural resources and scenic character.
- Streamlined Permitting: Zoning adjustments help simplify and expedite development review.
- Partnership Support: The HRA works with property owners, developers, and community members to explore opportunities within the ROSO District.
The ROSO District represents an innovative balance between expanding housing opportunities and protecting Cook County’s distinctive landscape.
Goals & Key Benefits
The ROSO District is designed to achieve several important community goals:
Expand Housing Options
Support the development of new homes across income levels in areas well-suited for residential growth.
Reduce Costs for Developers and Homeowners
Cluster development can lower utility, infrastructure, and site preparation expenses, helping make new housing more attainable.
Preserve Open Space
Maintain natural areas, wildlife habitat, and scenic views by requiring a portion of the land to remain undeveloped.
Streamline Development Processes
Provide a more predictable and efficient path for property owners and developers interested in building within Cook County.
Community Meetings
As part of the HRA’s commitment to transparency and community involvement, a series of public meetings will be held throughout each of Cook County’s Commissioner Districts. These meetings give property owners, local realtors, developers, and residents the opportunity to:
- Learn about the ROSO District and how it applies to their area
- Understand the benefits of cluster development and open space preservation
- Explore potential development opportunities on their property
- Ask questions about zoning, land use, and design requirements
- Connect with professionals who can help them take the next steps
Feedback from these meetings helps guide future planning decisions and ensures that ROSO development aligns with community priorities.
A Tool for Thoughtful Growth
The Residential Open Space Overlay District helps Cook County address its growing housing needs while maintaining the character and natural beauty that residents value. By encouraging innovative, land-efficient development and fostering collaboration between stakeholders, the HRA aims to create more opportunities for people to live, work, and thrive in Cook County—today and into the future.