HABU pathway glossary

What is SB 684 small-lot infill?

SB 684 created a state-law process for certain small-lot housing and subdivision projects on qualifying sites. It is a different pathway from an ADU or a two-lot SB 9 concept.

How to use this definition

Use it to understand the pathway named in your HABU report. A screen can identify a reason to investigate; only project-specific local and professional review can validate a development plan.

What this pathway means for a homeowner

What it could lead to

For a qualifying site, the pathway could lead to multiple separately mapped residential lots and homes in a small infill project. The feasible layout and unit count depend on zoning and density, the parcel, existing development, access, utilities, objective standards, and project economics.

What HABU screens

HABU reviews available jurisdiction, zoning, parcel, constraint, and preliminary economic inputs to identify whether SB 684 warrants deeper study. A positive screen is a lead for feasibility work, not confirmation that a subdivision or housing application will be approved.

What still needs professional and local review

Local planning and public-works staff and a qualified subdivision team must confirm the site and project meet current law and local objective standards. Survey, title, map design, density, access, fire, utilities, civil engineering, fees, financing, and market demand all require project-specific validation.

Screening disclaimer: HABU does not determine legal eligibility or guarantee approval, physical fit, cost, rent, value, financing, timing, or return. Do not spend money or commit to a project based only on a screen; obtain local-agency and qualified professional review.

Questions about SB 684 small-lot infill

Is SB 684 the same as an SB 9 lot split?

No. They are different state-law pathways with different project types and qualification rules. HABU screens them separately so an owner does not treat one result as approval for the other.

Does a positive SB 684 screen set the final lot or unit count?

No. The final concept depends on verified zoning and density, survey and title work, objective standards, infrastructure, design, agency review, and economics.

Check the source and compare pathways

Read the state source, then compare the other pathway definitions before treating one option as the answer for your property.

Authoritative source

California Government Code section 66499.41

Ready for a property-specific screen?
Start with the available parcel data, then validate any promising path.
See how HABU screens developer value