Missing Middle LA
Missing Middle LA is the City of Los Angeles program that translates SB 9, AB 1033, and the Starter Home Revitalization Act into local zoning rules and ministerial approval paths.
Dana Studio provides comprehensive zoning and land use feasibility analysis, architectural services, and entitlement and permitting services for Missing Middle LA–eligible projects across Los Angeles, from early feasibility through permit approval and construction-phase support.
Is Missing Middle LA Right for Your Property?
Missing Middle LA affects single-family and low-rise residential lots across Los Angeles. Whether you own one lot or a portfolio, the relevant question is the same: what does your specific parcel allow, and what does it take to build it?
You Own a Single-Family Lot
You want to add a unit, expand what you have, or understand what new state and local laws now allow on your property.
- Detached ADU in the rear yard
- ADU within a new or expanded house
- JADU carved from existing interior space
- SB 9 two-unit development on eligible lots
- AB 1033 separate ownership for a new ADU
You Want to Build and Sell
You are looking for a repeatable project type with a clear, ministerial approval path, no discretionary hearing when objective standards are met.
- SB 9 urban lot splits into two fee-simple parcels
- Small-lot subdivisions under SHRA on RD and R1 lots
- ADU condo sales under AB 1033
- Two-to-four unit infill on eligible R1 parcels
You Hold or Acquire Multiple Sites
You need a zoning and design partner who understands the full picture: program eligibility, objective design standards, HPOZ and hillside constraints, and LADBS plan check.
- Multi-parcel feasibility screening
- SHRA small-lot subdivision design
- Hillside, fire zone, and HPOZ overlay analysis
- Full-scope architecture through permitting
If you are not sure which path applies to your lot, that is exactly what a feasibility review is for. Dana Studio reviews the parcel, the zoning, and the applicable state and local rules before any design work begins.
How Dana Studio Can Help You
Missing Middle projects work best when zoning, design, and permitting are handled as one process. Dana Studio covers every phase, from initial site analysis and feasibility studies through permitting.
Feasibility & Zoning Analysis
Before any design work starts, Dana Studio evaluates the site against the applicable rules: LAMC zoning, state law eligibility, and any overlays.
- ZIMAS / NavigateLA parcel review
- ADU, SB 9, SHRA, and AB 1033 eligibility
- HPOZ, hillside, and fire-zone overlay check
- Program path recommendation
Design & Construction Documents
Schematic design through construction documents, coordinated with structural, MEP, and civil consultants as needed. Objective design standard compliance built in from the start.
- Schematic and design development
- Full construction document set
- Title 24 and LABC code compliance
- Consultant coordination
Permitting & Construction Administration
Dana Studio manages LADBS plan check submission, responds to corrections, and provides construction administration support through project close-out.
- LADBS plan check submission and tracking
- Plan check correction responses
- Construction administration
- Certificate of occupancy support
What Missing Middle LA Is
Missing Middle LA is a City of Los Angeles City Planning initiative to expand small-scale housing options in low-rise residential neighborhoods by amending the Los Angeles Municipal Code to carry out state housing law. The program is organized into three named components, each tied to a specific piece of legislation.
Small-Scale Homes Code Amendment
Allows two-unit development on eligible single-family parcels, establishes the urban lot split process, updates the city's accessory dwelling unit ordinance, and authorizes separate sale of ADUs as condominiums under AB 1033.
SHRA / Small-Lot Subdivision Amendment
Creates a ministerial approval path for small-lot subdivisions of up to ten units on qualifying infill parcels, implementing the Starter Home Revitalization Act at the local level.
Citywide Objective Design Standards
Sets written, measurable standards for building massing, materials, tree preservation, landscaping, and open space. Projects that meet these standards qualify for ministerial approval without a discretionary hearing.
A note on Historic Preservation Overlay Zones (HPOZs): The objective design standards include ADU-specific provisions for HPOZ properties. This gives homeowners in historic districts a clear, ministerial path to add an ADU, rather than triggering the design review process that can otherwise apply in historic districts. Learn more at the Low-Rise Design Lab.
Sources: Missing Middle LA, planning.lacity.gov Low-Rise Design Lab, planning.lacity.gov
Project Types
Missing Middle LA opens up five project types on qualifying Los Angeles parcels. Each has a different legal basis, a different set of site requirements, and a different end product. Dana Studio evaluates which paths are available on your specific lot before any design work begins.
Accessory Dwelling Unit
A self-contained unit added to a residential parcel. Detached ADUs, ADUs within the primary structure, and JADUs converted from existing interior space are all permitted ministerially when LAMC and state standards are met.
Two-Unit Development
Up to two primary dwelling units on a single-family lot in an R1 or equivalent zone. Ministerial approval when state and local eligibility criteria are met. ADUs and JADUs may be added to the parcel per state and local ADU rules. Note: if the urban lot split is also used, ADUs and JADUs are not permitted on parcels that use both provisions.
Urban Lot Split
A parcel map dividing a single-family lot into two parcels of at least 1,200 sq ft each. Each resulting parcel may develop up to two primary units. If both the urban lot split and two-unit development provisions are used on the same parcel, ADUs and JADUs are not permitted on that parcel. Fee-simple ownership of each parcel after recordation.
ADU as Condominium
Allows an ADU to be sold separately from the primary residence as a condominium unit, subject to local ordinance opt-in. Los Angeles has adopted enabling rules. Requires a condominium conversion map.
Small-Lot Subdivision
Ministerial subdivision of a qualifying infill lot into up to ten parcels with one unit each. Implements the Starter Home Revitalization Act at the local level. Available on eligible multifamily lots and on eligible vacant single-family lots, subject to SHRA site and project criteria.
Sources: Missing Middle LA, planning.lacity.gov SB 9, leginfo.legislature.ca.gov
How the Process Works
Dana Studio handles the process from initial site analysis and feasibility studies through permitting and construction-phase support. The work follows a standard architectural sequence, but the scope is tailored to the site, the approval path, and the consultants required for the project.
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Pre-Design and Feasibility
The project starts with site research, code analysis, feasibility review, and coordination of the survey and available agency records. This phase confirms the site constraints, likely development envelope, and the most realistic approval path before design begins.
- Review zoning, overlays, lot dimensions, slope, access, and other site constraints.
- Coordinate feasibility findings, site diagrams, and survey information to verify setbacks, floor area, and massing.
- Confirm code requirements and gather available building department records.
- Establish the project scope before schematic design starts.
A solid pre-design phase prevents redesign later.
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Schematic Design
Schematic design turns the program and site information into preliminary floor plans, layout studies, and building form. This phase is used to settle the general arrangement, room sizes, and core design decisions before the drawings are developed in detail.
- Prepare floor plan studies, site layout options, and preliminary massing.
- Develop the overall building arrangement and principal spaces.
- Hold design review meetings with the owner to review and refine the preliminary design.
- Finalize the schematic design for owner sign-off before moving forward.
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Design Development
Design development refines the approved schematic design into a coordinated architectural set. This phase resolves exterior and interior materials, major building systems, and the size and location of doors, windows, and other key elements needed before construction documents begin.
- Refine the approved design with elevations, sections, and preliminary construction details.
- Coordinate major systems, consultant input, and code requirements.
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4Dana Studio + City Agencies
Construction Documents and Permitting
Construction documents develop the approved design into permit and construction drawings. This phase incorporates the required consultant work in the architect's scope and coordinates owner-provided consultants as needed while the permit package moves into agency review.
- Prepare the architectural permit and construction drawing set.
- Incorporate Title 24 and coordinate structural, civil, soils, survey, landscape, fire sprinkler, solar, and other consultant information as required.
- Submit for permitting and respond to plan check comments as part of permitting services.
- Coordinate any required mapping or subdivision documents tied to the approval path.
- Walk the plans set through the permitting process until permits are "ready to issue."
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Construction Phase Services
During construction, Dana Studio provides architect-of-record support on an hourly basis. Typical services include submittal review, responses to RFIs, and periodic site observation to monitor progress and general conformance with the approved contract documents.
- Review submittals and respond to RFIs.
- Provide plan clarifications as needed during construction.
- Visit the site periodically to observe progress and quality of the work.
- Review proposed changes for consistency with the approved documents.
Sources: Missing Middle LA, planning.lacity.gov SHRA / SB 684 / SB 1123, planning.lacity.gov Low-Rise Design Lab, planning.lacity.gov
Constraints and Exclusions
Not every lot qualifies for every Missing Middle LA path. State law and city rules remove some parcels from ADU, SB 9, and SHRA eligibility. A feasibility review identifies these before any design work starts.
SB 9 Ineligible Lots
- Prime farmland or farmland of statewide importance
- Wetlands
- High or very high fire hazard severity zones (with exceptions)
- Hazardous waste sites
- Earthquake fault zones (Alquist-Priolo)
- 100-year floodplain (FEMA Zone AE or VE)
- Parcels within a designated historic district, an HPOZ, or listed as a Historic Cultural Monument (HCM)
Overlays That Affect Design
- HPOZ: objective design standards apply; some programs have HPOZ-specific provisions
- Hillside Area: grading, access, and massing restrictions apply
- Coastal Zone: Coastal Commission review may apply
- Specific Plans: some plans impose additional standards
- RFA (Residential Floor Area) limits affect buildable area
- Slope and access restrictions for hillside ADUs
Site Conditions That Matter
- Lot size below program minimums (SB 9: 2,400 sq ft post-split minimum)
- Prior lot split recorded on the parcel (SB 9 once per original parcel)
- Non-conforming structures that limit new development
- Deed restrictions or CC&Rs (not preempted by state law)
- Active Ellis Act eviction within 15 years
- Tenant protections that limit demolition or conversion
HPOZ and Missing Middle Housing: The Missing Middle LA objective design standards will include specific provisions for properties within Historic Preservation Overlay Zones. This gives homeowners in historic districts a clear, ministerial path to add an ADU rather than triggering the design review process that can otherwise apply in historic districts. Dana Studio has experience navigating HPOZ requirements at LADBS and the Office of Historic Resources.
Sources: SB 9, leginfo.legislature.ca.gov Missing Middle LA, planning.lacity.gov
Example Project Paths
These examples use common Los Angeles lot types to show how a real site planning exercise might unfold. They are illustrative only. Actual eligibility depends on the specific parcel, current LAMC provisions, and applicable state law.
R1 Lot, Detached ADU + JADU
6,000 sq ft lot · Existing single-family residence · R1-1 zone
- One detached ADU up to 1,200 sq ft in the rear yard
- One JADU up to 500 sq ft converted from existing interior space
- Both ministerially approved when LAMC standards are met
- Result: 3 units total on one parcel
- Feasibility review: lot coverage, setbacks, FAR, height limits
- ADU design, construction documents, Title 24
- JADU conversion drawings
- LADBS plan check and permit coordination
SB 9 Lot Split, Two Parcels, Two Units Each
7,500 sq ft lot · Vacant or demolish existing · R1-1 zone
- Split into two parcels of approximately 3,750 sq ft each
- Two primary units per parcel (four total)
- ADUs are not permitted if both the urban lot split and two-unit development provisions are used on the same parcel (four units total in that case)
- Owner-occupancy required on one parcel for three years post-split
- SB 9 eligibility analysis and lot split feasibility
- Parcel map preparation and LADBS/Bureau of Engineering coordination
- Design for units on both parcels
- Construction documents and plan check for all structures
SHRA Subdivision, Small-Lot Infill
12,000 sq ft lot · RD1.5 zone · Existing SFD to remain on one parcel
- Ministerial subdivision into up to 8 parcels (one unit each)
- Existing SFD retained on one remainder parcel
- New units on 7 subdivided parcels
- Fee-simple ownership of each parcel at close
- SHRA eligibility analysis and lot yield study
- Subdivision map and parcel design
- Architecture for new units meeting objective design standards
- Full plan check and permitting through LADBS
ADU Within Proposed SFD Envelope + Detached Rear ADU
5,500 sq ft lot · Existing SFD to be replaced · R1-1 zone
- New SFD with attached ADU within the primary structure
- Detached ADU up to 1,200 sq ft in rear yard
- ADU condo map possible under AB 1033 for separate sale
- Result: 3 units, one potentially separately ownable
- Feasibility and program study for SFD + two ADUs
- Integrated design: SFD, attached ADU, detached ADU
- AB 1033 condominium map feasibility review
- Construction documents and full LADBS plan check
These scenarios are illustrative only. Actual project eligibility and program outcomes depend on the specific parcel, applicable LAMC provisions, current state law, and conditions at the time of application. Dana Studio performs a site-specific feasibility review before any design work begins.
Resources
Start with official city and state sources. These are the public references Dana Studio uses to track Missing Middle LA, SHRA, current ADU rules, and LADBS plan check requirements.
Missing Middle LA
planning.lacity.gov, Missing Middle LAThe official program page with ordinance documents, fact sheets, and objective design standards.
Low-Rise Design Lab
planning.lacity.gov, Low-Rise Design LabDesign guidance for low-rise residential infill, including HPOZ ADU provisions and objective design standards.
Building Permits & Plan Check
dbs.lacity.govLADBS permit portal, plan check status, and code resources for Los Angeles building projects.
SB 9, Two-Unit & Lot Split
leginfo.legislature.ca.gov, SB 9 (2021)The state law authorizing two-unit development and urban lot splits on single-family zoned parcels.
SB 684 & SB 1123, SHRA
leginfo.legislature.ca.gov, SB 684 (2023) leginfo.legislature.ca.gov, SB 1123 (2024)SB 684 (2023) established the Starter Home Revitalization Act for multifamily-zoned infill sites. SB 1123 (2024) extended ministerial small-lot subdivision to eligible single-family zoned lots. AB 130 (2025) made further amendments effective July 1, 2025.
Need a Site-Specific Answer?
Contact Dana Studio for a project conversation or request a formal feasibility study. This is the fastest way to find out which Missing Middle LA path fits your lot.