AB 1140 directs the California Department of Corrections and Rehabilitation (CDCR) to develop a pilot program that houses a portion of incarcerated adults in single-occupancy cells at four state prison facilities. The statute leaves selection and operational criteria to the Secretary but sets a statutory floor on scope and a required public report to the Legislature.
This matters to corrections officials, facility planners, and compliance teams because it forces CDCR to test single-occupancy housing within existing infrastructure and produce a data-rich evaluation of capacity, programming participation, and incidents. The pilot could affect housing assignments, staffing, and program delivery at participating prisons and will produce the evidentiary basis for whether single-cell housing is scaled later on.
At a Glance
What It Does
Requires CDCR to implement a pilot placing a subset of incarcerated adults in single-occupancy cells at four adult prisons and to publish an evaluative report. The Secretary selects sites and establishes eligibility criteria and operational changes needed for implementation.
Who It Affects
CDCR leadership and facility administrators who will choose sites and reassign housing; incarcerated adults eligible for single-occupancy placement; corrections staff who manage housing, programming, and security at participating prisons.
Why It Matters
The bill forces CDCR to test single-cell housing within current facilities and to create a standardized dataset (capacity, program participation, disciplinary incidents) for lawmakers. That dataset will shape future policy choices about housing design, staffing, and budgets.
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What This Bill Actually Does
AB 1140 creates a time-limited pilot to evaluate single-occupancy housing in California’s adult prison system. The Secretary of CDCR must design and run the pilot at four adult prison facilities (selected by the Secretary) and set the criteria for who may be placed in single cells.
The statute instructs CDCR to make participation voluntary and to allow any participant to request a return to shared housing at any time.
The pilot is deliberately constrained. It must operate within existing facilities—no new construction is allowed—and it must apply to a defined slice of each participating facility’s population.
The department must also exclude certain short-term or safety-related cells from counting toward the pilot’s target. Those operational constraints force CDCR to test single-occupancy housing by reallocating existing beds and making site-specific changes rather than building new wings.CDCR must produce a public, detailed report that documents facility capacities at two points in time, counts of who was placed in single cells, programming participation (work, education, treatment and reentry) on specified dates, and disciplinary and violent incidents disaggregated by cell type.
The report must also provide the inclusion/exclusion rules the Secretary used and a qualitative account of what each site changed to implement the pilot. That reporting requirement is designed to produce comparable data across sites so policymakers and administrators can assess operational, safety, and rehabilitative effects.Operationally, the statute gives CDCR latitude to select the pilot sites and to set eligibility criteria, but it constrains that discretion with reporting obligations and explicit exclusions for certain cell types (safety, detox, temporary holding).
The combination of voluntary participation, a capped share of each facility’s population, and an explicit prohibition on new construction shapes both the sample of participants and the tactical choices CDCR must make about transfers, staffing, and program access while running the pilot.
The Five Things You Need to Know
The pilot must operate at four adult CDCR facilities (facility selection by the Secretary) and must be implemented by January 1, 2027.
The pilot must apply to 10% of the population at each designated facility and excludes women’s state prisons, medical facilities, and state hospitals from participation.
Participation is voluntary; an incarcerated person may request transfer out of a single-occupancy cell at any time, and CDCR’s denial of a request to be placed in a pilot site does not create a cognizable cause of action.
CDCR must submit a public report by March 15, 2028 that includes facility capacity figures for Dec 31, 2026 and Dec 31, 2027, counts of single-cell placements, programming participation on specified dates, disciplinary and violent incidents disaggregated by single vs. non-single cells (with a monthly breakdown for the first year), inclusion/exclusion criteria used, and a qualitative description of implementation changes.
The pilot expressly prohibits building new prison capacity; CDCR must implement the pilot using existing beds and operational changes.
Section-by-Section Breakdown
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Creates the single-occupancy cell pilot and assigns CDCR responsibility
This subsection directs the Secretary of CDCR to develop and implement a pilot program to house incarcerated adults in single-occupancy cells at four prison facilities. The Secretary (or designee) must set the criteria for who will be placed in single cells and choose the participating facilities. Practically, this centralizes design and site-selection authority within CDCR leadership and requires the department to produce operational rules rather than prescribing them in statute.
Scope limits: facility type and participation floor
Subsection (b) narrows where the pilot can run—four adult prisons under CDCR jurisdiction—and sets a quantitative floor by requiring the pilot to cover 10% of each designated facility’s population. It also excludes certain facility categories (women’s state prisons, medical facilities, state hospitals) from being pilot sites, which will shape the representativeness of the pilot and limit learnings about women and medically complex populations.
Detailed reporting obligations to the Legislature and Governor
This long subsection requires a public report by March 15, 2028 with discrete data points and narrative material: rated, operational, and design capacity on two dates; counts of single-cell placements; counts of work, education, and treatment/reentry participation on two dates; housing classifications for those in programs; and disciplinary/violent incident counts disaggregated by cell type and, for the first operational year, by month. It also mandates disclosure of inclusion/exclusion criteria and a qualitative account of site-level implementation changes. The requirement is designed to create a comparable dataset across sites for policy evaluation.
Excludes certain short-term or safety-related cells from pilot counts
Subsection (d) specifies that cells used for safety, detoxification, and temporary holding do not count toward the 10% pilot target. This prevents CDCR from meeting placement targets by using short-term or special-purpose cells and ensures the pilot measures allocations of standard housing units rather than transient or safety-related placements.
Voluntary participation; denial not actionable; no new construction
The bill makes participation voluntary and allows incarcerated people to request exit from single-occupancy housing at any time. It also states that a denial of a request for placement in a pilot site is not a cognizable cause of action, which limits legal exposure for CDCR. Additionally, the statute prohibits any new construction to satisfy the pilot, forcing the department to reconfigure existing beds and operations rather than expand physical capacity.
Administrative compliance with Government Code reporting rules
The reporting required in subsection (c) must comply with Government Code Section 9795, which governs format and electronic submission standards for mandated reports. This ties the pilot’s deliverable to the state’s reporting infrastructure and deadlines, and ensures the report follows established norms for public data submissions.
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Explore Criminal Justice in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Incarcerated individuals who prefer single-occupancy housing — they gain an explicit, voluntary path to single cells and the ability to leave single-occupancy housing at will, which may improve privacy and safety for some people.
- CDCR policymakers and legislators — they receive a structured, comparable dataset on capacity, programming participation, and incidents that informs evidence-based decisions about scaling single-cell housing.
- Facility administrators and program managers at pilot sites — they get funding and a mandate to reconfigure operations and test changes that could improve program delivery and safety outcomes if the pilot demonstrates benefits.
- Reentry and treatment providers — the report’s program-participation metrics create visibility into how housing configurations influence access to work, education, and treatment programming.
Who Bears the Cost
- CDCR and state taxpayers — the department will absorb planning, staffing, reassignment, and potential retrofit costs to implement single-occupancy housing within existing facilities without new construction funding.
- Correctional facility operations teams — housing reallocations required to meet the 10% per-site floor may increase administrative burden, require shift and staff-model adjustments, and complicate cell assignments for non-participants.
- Other incarcerated people at pilot sites — reallocating existing beds to single-occupancy slots could lead to increased double-bunking elsewhere, more frequent transfers, or reduced access to preferred housing assignments for non-participants.
- Legal and compliance teams — compiling the prescribed, disaggregated monthly incident data and program participation figures requires new tracking and reporting workflows that legal and records departments must support.
Key Issues
The Core Tension
The bill pits the policy goal of testing single-occupancy housing (privacy, safety, rehabilitative access) against operational constraints (existing bed stock, staffing, and budget). It asks CDCR to produce rigorous, comparable evidence while limiting how the department can meet the pilot’s targets—no new construction and a fixed percent per site—creating a core dilemma between research validity and practical feasibility.
The bill deliberately leaves key operational choices to the Secretary, which creates both flexibility and ambiguity. Flexibility lets CDCR tailor implementation to facility realities, but it also creates risks of noncomparable site selection and opaque inclusion criteria; the statute requires disclosure of those criteria, but doesn’t standardize them.
That opens the door to selection bias: if CDCR favors low-risk facilities or inmates for the pilot, the report may overstate safety benefits and understate operational difficulties.
The requirement to meet a 10% per-facility floor while forbidding new construction forces trade-offs. CDCR will have to reassign beds within existing capacity, which could produce downstream crowding pressures in non-pilot housing or necessitate transfers.
The prohibition on counting safety, detox, and temporary holding cells prevents gaming the numbers but also excludes populations for whom single-cell placement might be most relevant (e.g., those in detox or needing protective custody). Finally, the report’s short time horizon and mandated snapshot dates (end-of-year counts) may miss dynamic effects and seasonal variation; monthly incident reporting for only the first year helps, but many operational outcomes require longer follow-up to assess sustainability and net impacts on programming and recidivism.
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