If you own a residential property in the City of Los Angeles, there is a good chance you sit inside a Transit Oriented Communities (TOC) tier without knowing it. TOC is the city’s affordable-housing incentive program, and for ADU owners and developers the four tiers (Tier 1 through Tier 4) translate into real money: bigger density bonuses, smaller required setbacks, and in the highest tiers, zero on-site parking requirements.
This guide explains exactly what each tier means, how to tell which one applies to your property, and the practical impact on ADU and small-multifamily projects.
What TOC actually is
TOC was created by Measure JJJ in 2016 and codified in LA Municipal Code section 13B.6. The premise is simple: properties close to high-quality transit get permission to build more housing in exchange for setting some of that housing aside as affordable. The “closer to transit” part is graded into four tiers, with Tier 4 the closest and getting the biggest incentives.
For ADU owners specifically, TOC matters less than it does for multifamily developers, because state ADU law already grants generous bonuses that often supersede local rules. But TOC still affects parking requirements, setback minimums on accessory structures, and the math on whether a second ADU (the new state law allows two on most residential parcels) is feasible.
The four tiers, in plain English
Each tier is defined by the type and proximity of the transit nearby. The official definitions from LA City Planning:
| Tier | What qualifies you | Headline bonus |
|---|---|---|
| Tier 1 | Within 1,500 ft of a Rapid Bus stop, or 2,640 ft (1/2 mile) of a rail station that is not a Major Transit Stop, or 1,500 ft of an intersection of two Major Bus Lines | 50% density bonus, 0.5 parking spaces per unit, modest height/setback relief |
| Tier 2 | Within 1,500 ft of a Major Transit Stop where Bus Rapid Transit crosses a Major Bus Line | 60% density bonus, 0.5 parking, larger setback relief |
| Tier 3 | Within 750 ft of a rail station, or 750 ft of a Major Transit Stop where rail crosses a Major Bus Line | 70% density bonus, 0 parking required, significant setback and FAR relief |
| Tier 4 | Within 750 ft of an intersection of two rail lines, or 750 ft of a Major Transit Stop that combines rail with another high-frequency mode | 80% density bonus, 0 parking, the largest FAR and setback incentives |
In practice, Tier 1 covers a wide swath of the city. Tier 2 is meaningfully smaller. Tier 3 is the ring around every Metro rail station. Tier 4 is genuinely rare; in our analysis of all single-family parcels in LA, we found zero qualifying detached SFRs in Tier 4 zones (because rail-rail intersections like 7th & Metro or Wilshire/Vermont are surrounded by commercial and high-rise residential, not single-family homes).
Why TOC matters for ADU projects specifically
State ADU law already requires cities to approve at least one ADU and one Junior ADU on any property with a single-family home. Where TOC adds value:
Multiple ADUs on multifamily lots. If you own a duplex or fourplex inside TOC, the math for adding multiple detached ADUs gets dramatically more favorable. Setbacks can shrink, height envelopes grow, and lot coverage limits ease.
Parking exemption. ADUs near high-quality transit are already exempt from on-site parking under state law (AB 68). But for the primary dwelling, TOC Tier 3 and Tier 4 also exempt parking for the main residence, which can free up driveway and garage space for an attached or converted ADU.
Density beyond ADUs. If your lot is large enough and your zoning supports more units (R2 and up), TOC can convert a 2-unit-by-right parcel into a 4-unit-by-right parcel inside Tier 3 or 4. Combined with state SB 9 lot splits, this is how some LA owners build small townhouse-style developments on what was a single SFR lot.
How to find out which tier your property is in
Three ways, ordered from fastest to most authoritative:
- ZIMAS. LA City’s official parcel data system. Enter your address at zimas.lacity.org, scroll to the “Planning and Zoning” panel, and look for the “Transit Oriented Communities (TOC)” line. It returns the tier number directly, or “Outside TOC” if you are not in one.
- Our ADU eligibility tool. Faster for a quick sanity check. Free ADU eligibility lookup returns the TOC tier as part of the assessment.
- Pre-application meeting with LADBS or LA City Planning. For projects where the tier materially changes the design, the planner will give you the authoritative answer in writing.
The catch: TOC is incentive-driven, not free
TOC bonuses are not automatic. To use them, the project must include an affordability set-aside: a percentage of the units must be deed-restricted as affordable to extremely-low, very-low, or low-income households, with the percentage rising as the tier rises. For a homeowner adding one ADU under state law, this is irrelevant. For a developer building 4 or 8 units on a TOC Tier 3 lot, the affordable set-aside is the price of admission.
The affordability set-aside in Tier 3 is roughly 14% to 20% of base units depending on income target. In Tier 4, it climbs higher. The deed restriction lasts 55 years.
Common misconceptions
“My property is near a bus stop, so I qualify.” Not every bus stop counts. Only stops on Metro Rapid lines or designated Major Bus Lines trigger TOC. A standard local-route bus stop on your corner does nothing.
“TOC and ADU are the same.” ADU rights come from state law (AB 68, AB 494, SB 13, SB 9). TOC is a separate LA city program that layers additional bonuses on top. They can stack but they are not the same thing.
“If I am in TOC I have to use it.” No. TOC is an opt-in incentive program. You can build under standard zoning instead and skip the affordability set-aside.
“TOC works in all of LA County.” No. TOC is a City of Los Angeles program only. Properties in unincorporated LA County, or in independent cities like Beverly Hills, West Hollywood, Pasadena, Burbank, Glendale, do not have access to TOC.
What we see in real projects
The single biggest TOC wins we have helped clients capture are on small multifamily lots in Tier 2 and Tier 3 along Vermont, Western, Crenshaw, and the Expo corridor. A 5,000 sq ft R2 lot that would normally allow 2 units can support 3 or 4 with TOC, and the lot’s value moves accordingly. For pure ADU additions on single-family lots, the impact is more modest, but the parking exemption alone can change whether an attached ADU is feasible.
Next steps
If you want to know whether your property qualifies for any TOC tier and what that means for your specific project:
- Run our free ADU eligibility check to see your TOC tier and other key zoning data
- Pull your full permit history to confirm the parcel’s existing improvements
- Schedule a consultation with one of our licensed general contractors to map a feasible project
TOC is one of the most powerful tools an LA property owner has, and one of the most underused. If your parcel is in any tier, the upside is worth a serious look.
Frequently asked questions
Quick answers
What is a TOC tier in Los Angeles?
TOC stands for Transit Oriented Communities. It is a Los Angeles affordable-housing incentive program that grants density bonuses, setback relief, and parking exemptions to projects near high-quality transit. Tiers 1 through 4 are graded by proximity to transit, with Tier 4 the closest and richest.
Which TOC tier gets the best bonuses?
Tier 4 has the highest base bonuses (up to 80% density bonus, zero parking, the largest setback and FAR relief), but it is the rarest. Tier 4 zones are within 750 ft of intersections of two rail lines or rail + Major Transit Stop. Tier 3 is the most common high-impact tier in residential neighborhoods.
How do I find my property's TOC tier?
Enter your address into ZIMAS (zimas.lacity.org) and look at the Planning and Zoning panel for the Transit Oriented Communities (TOC) line. Our free ADU eligibility tool also returns TOC tier as part of the property report.
Does TOC apply to single-family ADU projects?
Partially. State ADU law already gives one ADU and one Junior ADU by-right, with parking exemptions near transit. TOC stacks additional bonuses on top, especially parking exemptions for the main house and density bonuses on multifamily lots.
Is TOC available outside the City of LA?
No. TOC is a City of Los Angeles program. Properties in unincorporated LA County, Beverly Hills, West Hollywood, Glendale, Burbank, Pasadena, Santa Monica, etc., do not have TOC. They may have similar but different local programs.
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