The Rise of “Middle Housing” Land Divisions: Splitting Lots Under SB 1537

Oregon’s housing landscape is shifting beneath our feet, and the latest catalyst is Senate Bill 1537. Passed to supercharge housing production, this law—combined with the earlier success of SB 458—is revolutionizing how we think about residential lots. We are moving away from the “one house, one lot” mentality toward a more flexible model that allows for “middle housing” land divisions. For homeowners and developers, this means splitting a single property into smaller, fee-simple lots for cottage clusters and townhomes is now more efficient than ever.

Key Takeaways

• Streamlined Land Divisions: SB 1537 removes local noticing and appeal barriers for middle housing lot splits.

• Fee-Simple Ownership: Buyers can now own the land beneath their cottage or townhome, not just the structure.

• Concurrent Processing: You can now process a subdivision and a middle housing land division simultaneously.

• Increased Density Bonuses: Projects featuring affordable or accessible units can qualify for additional density.

• Mandatory Adjustments: Local governments must grant 10% variances on lot sizes and setbacks for qualifying housing.

Understanding the Middle Housing Land Division

A middle housing land division allows you to take a “parent lot” and divide it into “child lots” based on the number of units built. Previously, building four cottages on one lot often meant a complex condo association. However, thanks to recent legislative updates, each cottage can now sit on its own deeded lot. This shift is a core component of the middle housing land division strategy, making these homes easier to finance for buyers and simpler to sell for builders.

How SB 1537 Removes Local Barriers

One of the most significant changes in 2026 is the reduction of red tape. SB 1537 officially streamlines the middle housing land division process by categorizing these applications as limited land use decisions. This means that if you meet the clear and objective standards, the city cannot require a lengthy public hearing or face a local appeal. Consequently, the timeline from “dirt to door” is significantly shortened, reducing carrying costs for developers.

Incentivizing Cottage Clusters and Townhomes

The new law does more than just simplify paperwork; it actively incentivizes smaller, more attainable homes. Under SB 1537, cities are encouraged to adopt “ready-build” plans and model codes for cottage clusters. Furthermore, if your middle housing land division project includes a unit that is accessible (Type A) or affordable (at 120% AMI), the state now mandates that cities allow you to add even more units to the site than traditional zoning would permit.

Mandatory Adjustments for Lot Splits

Sometimes, a project is “almost” perfect, but the lot is 5% too small. In the past, this required a costly variance. Today, SB 1537 requires local governments to grant “mandatory adjustments” of up to 10% for minimum lot sizes, depths, and setbacks. This flexibility is a game-changer for the middle housing land division process. It allows creative designs to fit onto irregular urban lots that were previously considered “unbuildable” for multi-unit projects.

Simultaneous Processing for Larger Projects

For developers working on larger scales, the ability to multi-task is vital. SB 1537 now explicitly allows for the simultaneous processing of a traditional subdivision and a middle housing land division. This means you can plat a new neighborhood and divide the individual lots for townhomes at the same time. This “parallel track” approach is designed to get thousands of new homes onto the Oregon market faster than the old “step-by-step” method allowed.

The Sunset of Restrictive Covenants

A major win for property rights came with the 2026 provisions that void recorded covenants prohibiting middle housing. Even if an old deed or HOA rule says “only one single-family home per lot,” state law now overrides those restrictions within urban growth boundaries. Therefore, if your zoning allows for a middle housing land division, an outdated CC&R cannot stop you from creating a cottage cluster or a set of townhomes.

Final Thoughts on Oregon’s Housing Shift

The “Middle Housing” revolution is about creating more rungs on the housing ladder. By making the middle housing land division process clear, objective, and efficient, SB 1537 is helping to build the “complete communities” Oregonians need. Whether you are looking to develop a small family plot or are searching for an attainable new townhome, these legislative tools are working in your favor.