- Typical cost
- Varies by parcel, unit count and site work
- Typical timeline
- 12–24 months including entitlement and permitting
- Permits through
- Pasadena Permit Center
- Service area
- Pasadena, San Gabriel Valley
What SB9 Allows
Two paths, sometimes combined: splitting one parcel into two, or building a second unit on the existing parcel. Both are ministerial approvals when the criteria are met.
- Urban lot splits into two parcels
- Two-unit developments on a single parcel
- New duplexes and detached second homes
- Combining SB9 with an ADU where allowed
- Tear-down and rebuild scenarios
SB9 Lot Splits & Two-Unit Development Conditions in Pasadena
Behind the plaster, these houses need the same things: new supply and drain lines, a full rewire, foundation bolting and real insulation. The craft is making new work read as original, which means matching trim profiles, window proportions and rooflines rather than substituting stock parts. Permits go through the Pasadena Permit Center, and design review timelines need to be built into the schedule.
- Historic and landmark district design review on exterior changes
- 1900 to 1930 Craftsman framing, often unbolted and uninsulated
- Galvanized supply lines and original wiring replacement
- Rot and joist repair under original bathrooms and porches
- Trim, window and roofline matching so additions read as original
Eligibility Comes First
A lot has to be in a single-family zone, meet minimum size after the split, and sit outside certain hazard and historic categories. Recent rental or eviction history can also disqualify a property. We check all of it before you spend money on design.
- Zoning and parcel size verification
- Fire-severity, flood and hazard zone screening
- Historic district and HPOZ constraints
- Rental and eviction history review
- Owner-occupancy and deed restriction requirements
From Parcel Map to Keys
SB9 projects involve a survey, a parcel map, utility separation, and then a full building permit for each unit. Because we design and build, one team carries it from the eligibility letter through the final inspection.
- Survey and tentative parcel map
- Separate utility services and meters
- Architectural plans and structural engineering
- Plan check corrections handled by us
- Construction with our own crews
FREQUENTLY ASKED QUESTIONS
Do you do sb9 lot splits & two-unit development in Pasadena?
Yes. Pasadena is part of our regular service area. We'll come out for a free on-site consultation, walk the property, and tell you what's realistic before you spend anything on design.
What does sb9 lot splits cost in Pasadena?
Varies by parcel, unit count and site work. Site conditions in Pasadena and your material selections move the number, which is why we price after walking the property rather than over the phone.
Who issues the permit in Pasadena?
Permits for this work go through Pasadena Permit Center. We handle the submittal, plan check corrections and inspections as part of the project.
Does my lot qualify for an SB9 split?
It has to be in a single-family zone, be large enough that both resulting parcels meet the minimum, and avoid certain hazard, historic and rental-history disqualifiers. We run the eligibility review before any design work.
How long does an SB9 project take?
Plan on 12 to 24 months from eligibility review to finished units, with the parcel map and plan check often taking as long as construction.
Can I build an ADU on an SB9 lot?
Sometimes, depending on the path you take and your city's implementation. We map out the maximum unit count for your parcel up front so you can compare options.
Do you handle SB9 projects near me outside the City of Los Angeles?
Yes. SB9 is state law, so it applies across California, but every city implements it differently. We handle SB9 lot splits and two-unit developments throughout the greater LA area within about 100 miles of our Woodland Hills office.
Similar Projects We've Built
SB9 Lot Split with Two New Homes, Highland Park
A single 6,800 sq ft Highland Park lot split under SB9 into two parcels, each with a new two-story detached home.
SB9 Lot Split with Two New Homes, Fullerton
A 9,000 sq ft Fullerton lot split under SB9 into two parcels, each with a new two-story modern farmhouse.
SB9 Lot Split with Two New Homes, Newbury Park
A 10,000 sq ft suburban lot split under SB9 into two parcels, each with a new single-story contemporary ranch.
DISCUSS YOUR PROJECT WITH 1 SMART BUILD
Licensed, bonded and insured design-build general contractor serving Los Angeles County and Southern California. Tell us about your property and goals, and we'll walk you through feasibility, permitting and a clear plan.