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San Bernardino County, California
Calculate the exact number of parking spaces required for your Fontana residential project. Parking is one of the most common plan check flags — getting the count wrong means corrections and resubmission. Fontana requires 2 spaces per dwelling unit, with additional requirements for ADUs and guest parking on larger projects.
Select your city, number of units, and bedrooms. Indicate whether you're including an ADU and whether you're near public transit — both affect requirements.
Each city has different parking requirements per unit. We calculate main parking, ADU parking, and guest spaces using your city's municipal code ratios.
See the exact number of stalls required, broken down by type. Transit-adjacent properties may qualify for reduced or eliminated ADU parking under state or local law.
Parking requirements are one of the most common reasons building projects get flagged during plan check. Every city sets its own ratios — and they vary significantly.
Key factors that determine your parking requirement:
Getting the stall count right is only half the battle — you also need to plan for the physical space. Standard stall dimensions:
A rough rule of thumb: each parking space (including its share of the drive aisle) consumes about 300–350 sqft of your site. Use our Setback Calculator to see how much buildable area you have for both structure and parking.
Yes, several ways. Transit proximity is the most common — being within ½ mile of a major transit stop can reduce or eliminate ADU parking in many jurisdictions. Some cities also offer parking reductions for affordable housing, shared parking agreements, or Transportation Demand Management (TDM) plans. Check your state and local rules for specific exemptions.
It depends on your state and city. Some states waive ADU parking near transit, in historic districts, or when the ADU is part of an existing residence. In states with ADU-specific laws, cities are often limited to requiring no more than 1 space per ADU. Check your local requirements or use our ADU Eligibility Checker for details.
In many jurisdictions, if you convert a garage to an ADU, you are not required to replace the lost parking spaces. This is a common provision in states with ADU-friendly laws — it prevents cities from using parking replacement as a way to block garage conversions. Check your local rules for specifics.
Transit proximity is typically defined as within ½ mile of a "high-quality transit corridor" — a bus route with frequent service during peak hours, a rail station, or a ferry terminal. The exact definition varies by state and city. Check your city's transit map to see if you qualify.
For residential projects, ADA-accessible spaces are typically required for common parking areas in multi-family projects (4+ units). The ratio is roughly 1 accessible space per 25 total spaces, with at least one van-accessible space. Single-family homes and ADUs generally don't require accessible parking unless they're part of a larger development.