ADU SIZE & BUILDING CONSTRAINTS
San Marcos offers flexibility in ADU design, but there are some limitations to keep in mind. Let's delve into some of the common questions:
What size ADU can I build in San Marcos?
- Detached ADUs can be up to 850 square feet for 1 bedroom units and 1,000 square feet for 2+ bedrooms.
- However, there's an exception! ADUs up to 800 square feet are exempt from lot coverage restrictions.
What is the setback requirement for an ADU in San Marcos?
ADUs must maintain a minimum of 4 feet from the rear and side property lines. Front yard setbacks vary depending on the underlying zoning.
An ADU built with 4-foot setbacks cannot exceed 16 feet in height. Taller ADUs need to comply with the standard setbacks of your zone.
Important note: ADUs cannot be built within the front yard setback or closer to the street than the main house.
How many ADU’s can you build on your property in San Marcos?
For single-family homes, you can typically build one detached ADU and one Junior ADU (JADU) on your property.
Multi-family properties have different allowances depending on the type of ADU and existing dwelling units. It's best to consult the city's zoning code for specifics.
How big can an attached ADU be in San Marcos?
The maximum size for attached ADUs is either 850 square feet or 50% of the main dwelling's square footage, whichever is smaller. However, there's a statewide exemption allowing a minimum of 800 square feet.
Can you build a 2-story ADU in San Marcos?
Detached ADUs are generally limited to one story and 16 feet in height. If you want a 2-story unit above a detached garage, it needs to comply with the height restrictions of your specific zone.
Attached ADUs can be 1 or 2 stories, but their height is subject to the limitations of the underlying zoning code.
Can you convert a garage into an ADU or add an ADU on top of a garage in San Marcos?
Yes! San Marcos allows converting existing garages or building an ADU above a garage, following the permitted uses and building code requirements.
What are the parking requirements for ADUs in San Marcos?
Generally, one parking space is required for an ADU unless your project qualifies for an exemption. This space can be located within the building setbacks or in an existing driveway.
What is the average time of the permitting process in the city of San Marcos?
The average permitting time frame can vary depending on the complexity of your project. It's best to contact the City of San Marcos Planning Department for the most current estimates.
Conclusion
Building an ADU can be a valuable addition to your San Marcos property. By familiarizing yourself with the regulations and zoning requirements, you can ensure a smooth and successful project. Remember, this guide provides a general overview, and it's always recommended to consult with the City for the latest information and any specific requirements that might apply to your property.