Chicago’s skyline and neighborhoods are always changing, driven by market forces, public policy and community needs. One of the biggest regulations shaping that growth is the city’s Affordable Requirements Ordinance (ARO)—a policy that affects almost every new multi-family development in Chicago.
For developers, the ARO is both a challenge and an opportunity. Understanding how it works is key to staying compliant, financially viable and strategically positioned in today’s market.
At Root Realty, we work with investors and developers across Chicago to help them navigate zoning, compliance and investment strategy. In this post we’ll break down what the ARO means for multi-family developers, how it impacts new projects and strategies for staying profitable while meeting affordable housing goals.
What is the Affordable Requirements Ordinance (ARO)?
The Affordable Requirements Ordinance is a Chicago housing policy that requires certain residential developments to include or support affordable housing units. Enacted in 2003, the ARO aims to create more equitable housing citywide, so low- and moderate-income residents can continue to live in neighborhoods that are growing and investing.
The ARO applies to developments that meet any of the following:
- 10 or more residential units, and
- Require a zoning change, city land or financial assistance from the City of Chicago.
If a development triggers the ordinance, the developer must set aside a percentage of units as “affordable” or pay an in-lieu fee that goes towards affordable housing elsewhere.
ARO Requirements: The Basics
While the specifics depend on the project’s location and size, the general framework is:
- Affordable Unit Requirement:
10–20% of units must be affordable, depending on the area’s market and city incentives. - Affordability Definition:
Affordable units are priced so that residents earning 60% of the Area Median Income (AMI) pay no more than 30% of their income on rent. For 2025 that’s roughly $1,300/month for a one-bedroom. - In-Lieu Fees:
Instead of building on-site affordable units, developers can pay a fee (usually $100,000–$180,000 per required unit, depending on the zone). This fee goes towards affordable housing projects citywide. - How the ARO Impacts Multi-Family Developers
The ARO affects a project’s financials, design and feasibility. Developers must model how affordable requirements impact profitability before breaking ground.
1. Reduced Rent Revenue
Affordable units generate less income than market-rate units which can reduce the overall return. However, including these units often opens up incentives or zoning flexibility that offsets some of that loss.
2. Financing and Appraisal Implications
Lenders and investors evaluate properties based on expected income. A higher percentage of affordable units may impact a project’s value or financing terms unless offset by lower land costs or public incentives.
3. Design and Leasing Challenges
In mixed-income developments, balancing amenity access and equitable design is key. Developers must comply with inclusionary design standards while keeping all tenants happy.
4. Project Timing and Approval Process
ARO projects may have longer approval timelines as they require additional city review, negotiations with the Department of Housing and sometimes community engagement.
Recent Changes to Chicago’s ARO
The ARO has evolved over the past decade to encourage more on-site affordable housing and align with Chicago’s overall housing goals.
Key changes include:
- Increased affordability percentage in “downtown” and “high-cost” zones (now up to 20%).
- Reduced in-lieu fee options—the city now strongly encourages building affordable units on-site or nearby.
- Incentives for deeper affordability, allowing developers to earn credits for units targeted at residents earning below 60% AMI.
- Neighborhood-specific zones that tailor affordability requirements to local market conditions.
Developers can no longer just pay out of the ARO; they must proactively plan for affordable units as part of their design and financial modeling.
Strategies to Stay Profitable While Meeting ARO Requirements
Navigating the ARO doesn’t have to kill profitability. With smart planning developers can align with the city’s housing goals while maintaining strong returns.
1. Use Density Bonuses and Zoning Incentives
Chicago offers density bonuses for developers who include affordable units. These bonuses can add floors, units or FAR (floor area ratio) which can significantly increase the project’s revenue.
2. Use Tax Credits and Financing Programs
Programs like Low-Income Housing Tax Credits (LIHTC) and Tax Increment Financing (TIF) can help offset the cost of affordable units. Many successful multi-family projects combine these with private financing to maintain margins.
3. Off-Site Unit Options
While the city prefers on-site affordability, some zones allow developers to build required units within a certain distance of the main project. This can make sense in areas where construction costs are lower.
4. Emerging Neighborhoods
Developers willing to build in Opportunity Areas or Transit-Oriented Development (TOD) zones can benefit from reduced parking requirements and higher density—both of which improve ROI.
5. Local Experts
Working with local consultants, attorneys and real estate professionals familiar with Chicago’s housing policies can help developers anticipate requirements and get the best deal structure.
The Bigger Picture: A More Equitable Chicago
While the ARO adds complexity to multi-family development, it also creates a more balanced city. By integrating affordable housing into thriving neighborhoods the ordinance supports diversity, access to opportunity and long-term neighborhood stability.
For developers aligning with these goals can mean better community relations, stronger approval prospects and a positive brand reputation—benefits that go beyond the bottom line.
Root Realty: Your Chicago Multi-Family Development Partner
At Root Realty we understand how Chicago’s policies like the ARO impact investment decisions. Our team helps developers and investors analyze opportunities, forecast financials and structure projects that meet both profit and compliance.
Whether you’re planning a new multi-family development, repositioning an existing property or exploring zoning changes we can help you navigate Chicago’s changing housing landscape with confidence.
Contact Root Realty today to learn how we can turn regulatory hurdles into strategic advantages in your next multi-family project.
