In a city with high land costs, which policy instrument most effectively expands affordable housing opportunities?

• A. Parking minimum reductions only
• B. Inclusionary zoning with density bonuses
• C. Urban growth boundary expansion
• D. Parcel tax incentives for luxury developments

Answer: (B)

When land costs are high, policies that directly create affordable units within new projects tend to be the most effective. Inclusionary zoning paired with density bonuses does exactly that: it requires a portion of new housing to be affordable and lets developers build more units than normally allowed in exchange. The higher density makes the project financially viable, helping offset the lower revenue from the affordable units, so a meaningful number of affordable homes get added to the market without needing separate subsidies. This approach integrates affordability into growth and captures value from new development.

Reducing parking requirements can lower construction costs and free up space, but it doesn’t guarantee affordable units or address affordability at scale. Expanding an urban growth boundary can influence land prices and growth patterns, yet its effects are indirect and can be slow or context-dependent. Incentives for luxury developments, on the other hand, tend to steer investment toward higher-end housing and actually undermine affordability, not expand it.