Millbrae · Building on your lot
Lot splits under SB 9 in Millbrae
Millbrae's own rules on lot splits under sb 9, with the code text for every value, and the state law underneath.
Each rule below links to the section of the Millbrae Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.
What Millbrae's code says
| How the lot may be divided |
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|---|---|
| Unit size |
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| Minimum new lot size |
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| Setbacks |
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| Standards |
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| Parking |
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Who this affects
Frequently asked questions
Can I split my lot under SB 9 in Millbrae?
Millbrae's code: Neither parcel may be smaller than 40% of the original lot area. (Urban lot split.) (§ 10.05.3535); Each unit may be no larger than 800 square feet. (SB 9 projects that do not meet the zone's development standards.) (§ 10.05.3550).
General information, not legal advice.
Ask about a specific Millbrae property
Ask GoCodebook how Millbrae's lot splits under sb 9 rules apply to your situation and get an answer that cites the section.
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