SB 9 Parking Requirements for Single-Family Dwellings in the City of Orange
If you're planning to use Senate Bill 9 to split a lot or add a second unit on your single-family property in the City of Orange, parking is one of the details that catches people off guard. The rules for SB 9-created units are meaningfully different from standard single-family dwelling requirements — and whether or not you need to provide a parking space depends partly on where your parcel sits relative to transit.
Here's what the ordinance actually says.
Standard Single-Family Dwelling Parking in Orange
Before getting to SB 9 specifically, it helps to know the baseline. Under Table 17.34.060.A of the Orange Municipal Code, amended by Ordinance No. 15-23, a standard single-family dwelling requires:
Up to 4 bedrooms: 2 enclosed garage spaces per unit, accessed by a 12-foot wide, 20-foot long driveway
5 or more bedrooms: 1 additional enclosed space (tandem configuration is allowed, but it cannot be located in a required front yard setback)
Enclosed means enclosed — a carport doesn't satisfy this requirement. The driveway dimension (12 feet wide, 20 feet long) is also a hard spec, not an approximation.
One important note: if you demolish or convert enclosed spaces in connection with building an ADU, the City of Orange does not require you to replace those spaces. That's consistent with California HCD's statewide ADU guidance and removes what used to be a meaningful barrier for owners who wanted to convert a garage to an ADU.
What Changes Under SB 9
For dwelling units created under SB 9, the parking requirement drops to one enclosed space — not two. The driveway spec stays the same: 12 feet wide, 20 feet long.
That's the general rule. But there's an exception that eliminates the requirement entirely.
No parking space is required at all if the parcel is located within:
½ mile walking distance of a high-quality transit corridor, OR
½ mile walking distance of a major transit stop, OR
1 block of a car share vehicle
If your property qualifies under any one of those three conditions, you don't need to provide a parking space for the SB 9 unit.
This matters more than it might seem. In a city like Orange, where OCTA bus lines and Metrolink access create transit proximity in several neighborhoods, some parcels that look like they'd require parking actually don't — because of where they sit on the map. Confirming your property's eligibility before you design anything is worth doing early, because the parking waiver affects your site plan, your lot coverage, and how much of the parcel you can use productively.
Why This Matters for Investors and Property Owners
If you're acquiring a property in Orange with the intent to use SB 9 — whether that's a lot split, a new second unit, or both — the parking requirement is part of your feasibility math. A second enclosed garage space takes up square footage and requires access. If your parcel is transit-adjacent, you may be able to skip it entirely, which frees up usable lot area.
Verifying what you're actually entitled to build before you close escrow is the same diligence step whether you're in Orange, Garden Grove, or anywhere else in Orange County. The transit proximity question is one more item to check — and it's a yes/no answer you can get from a planning inquiry before you're committed to anything.
For owners who already have an SB 9 project in motion: if you converted or demolished a garage to make room for the new unit, you don't have a replacement requirement to worry about. But if you're still in the planning phase and you're not in a transit-adjacent area, your design needs to account for one enclosed space with proper driveway access.
The Short Version
Under Ordinance No. 15-23 (amending Table 17.34.060.A of the Orange Municipal Code):
Standard SFDs: 2 enclosed spaces (or 3 for 5+ bedrooms), 12 × 20-foot driveway
SB 9 units: 1 enclosed space, 12 × 20-foot driveway — unless the parcel is within ½ mile of a high-quality transit corridor or major transit stop, or within 1 block of a car share vehicle, in which case no parking is required
Spaces demolished or converted for an ADU: no replacement required
If you're evaluating a property in Orange for an SB 9 project and want to know whether the transit exemption applies to a specific parcel, or what the full development feasibility looks like, start with a pre-offer analysis before you design anything around assumptions.
Dylan Serna is an ADU specialist real estate agent serving buyers and sellers across Orange County and LA County.
