Land records · Parcel maps · October 7, 2026
What Is Inclusionary Zoning? Affordable Units
What is inclusionary zoning? Rules requiring or encouraging new housing developments to include affordable units, often with density bonuses or fees.
What is inclusionary zoning? Inclusionary zoning is a set of local land use rules that require or encourage developers of new residential projects to include a share of units affordable to lower- or moderate-income households. Programs vary widely: some make affordable units mandatory for projects above a certain size, while others are voluntary and offer incentives such as extra density, reduced parking, or faster permits. Affordable units often carry deed restrictions that limit rents or resale prices for many years. This page is general land-records background, not legal advice.
Mandatory vs voluntary
| Type | Features |
|---|---|
| Mandatory | Required percentage of affordable units in qualifying projects |
| Voluntary | Incentives offered for including affordable units |
| In-lieu fees | Developers pay into a housing fund instead of building units |
| Off-site options | Affordable units built at another location |
Typical requirements
Programs often set: - A threshold project size, such as 10 units. - A percentage of affordable units, often between 10 and 20 percent. - Income targets, based on area median income. - An affordability period, sometimes 30 years or permanent. - Design rules to make affordable units comparable to market units.
Deed restrictions
Affordable units usually carry recorded covenants limiting rents or resale prices and requiring income-qualified buyers or tenants. These restrictions show up in title searches and land records.
Incentives
Density bonuses, reduced parking, flexible design standards, and fee waivers help offset the cost of providing affordable units. Some programs are applied through an overlay district or PUD approvals.
Buying an inclusionary unit
Buyers must income-qualify and agree to resale restrictions. Resale price formulas may limit appreciation. Owners usually must live in the unit and may need approval to rent it out.
Effects and debate
Supporters say inclusionary zoning creates mixed-income communities. Critics argue it can raise costs of market-rate units or slow development. Results vary with program design and housing markets.
Finding inclusionary rules
Check the local zoning code or planning department website. Zoning maps and zoning lookup tools may show where rules apply. Some programs apply citywide, while others target certain districts such as mixed-use zones.
Example
A city requires 15 percent of units in projects of 20 or more to be affordable to households at 80 percent of area median income. A developer building 100 apartments sets aside 15 units with capped rents and receives a density bonus allowing 10 extra market-rate units.
Long-term monitoring
Cities or housing agencies monitor affordable units through annual reports, income certifications, and resale reviews to make sure restrictions are followed.
Checking title for affordability covenants
Before buying a unit in a newer building, ask whether it is restricted. A title commitment will list recorded affordability covenants, and the housing agency can explain resale formulas and approval steps.
Bottom line
Inclusionary zoning requires or encourages new housing projects to include affordable units, often with incentives like density bonuses and with deed restrictions that limit rents or resale prices. Rules vary by city. Check the local zoning code and title records for restrictions. Explore zoning via the Platbookmapper map.
What is inclusionary zoning FAQ
What is inclusionary zoning?
Rules requiring or encouraging affordable units in new housing.
Is inclusionary zoning mandatory?
Some programs are; others are voluntary with incentives.
What is an in-lieu fee?
A payment instead of building affordable units.
Can I resell an inclusionary unit at market price?
Usually not; resale prices are restricted.
How long do affordability restrictions last?
Often decades, sometimes permanently.