Garage conversion ADUs in Solana Beach
A garage conversion is often the most economical ADU in Solana Beach, because the Solana Beach ADU Submittal Process and Basic Plan Requirements (June 2025) removes two big costs for conversions.
What the city waives for conversions
- Parking: no off-street parking required for an ADU converted from the house or an existing accessory structure
- Utilities: no new or separate utility connection, and no related connection fee or capacity charge
- Solar: ADUs within existing space aren't subject to the Energy Code solar requirement
State law also bars requiring replacement parking when a garage is converted to an ADU (Gov. Code §66314).
The floor area trade-off
Solana Beach exempts up to 200 sq ft per garage parking space (two spaces maximum, 9 by 19 ft, clear of door swings) from floor area. Once a garage is converted, those spaces no longer exist, which can affect the FAR worksheet. The ADU's own 800 sq ft exemption then applies. We run both numbers before design.
Practical issues
- Slab condition and moisture
- Insulation and energy compliance for living space
- Fire separation if attached
- Entrance location: not visible from the street adjacent to the front yard
- Sprinklers if the house had them
Why conversions are simpler here
- No off-street parking for an ADU converted from the house or an existing accessory structure.
- No new utility connection and no connection fee or capacity charge for a conversion.
- No Energy Code solar requirement for conversions within existing space.
- No grading of note in most cases, well under the 50 cubic yard cap.
The garage FAR exemption trade-off
The worksheet lets a garage deduct 200 sq ft per qualifying parking space, up to two (400 sq ft), if each 9 by 19 ft space is clear, including of door swings. Converting the garage removes that exemption, so on a lot near its limit we run the FAR math before choosing which garage space to convert.
Checklist
- Demolition plan showing walls removed and the area and occupancy (R-3, U)
- Kitchen meets the city specs
- Entrance not visible from the street
- Address number 4 in high, 0.5 in stroke
- Fire access within 150 ft of exterior walls
Also checked Oct 14, 2026: Solana Beach ADU Submittal Process and Basic Plan Requirements (June 2025).
Sources, checked Oct 14, 2026: Solana Beach ADU Submittal Process and Basic Plan Requirements (June 2025) · Gov. Code §66314.
FAQ
Do I need to replace parking if I convert my garage?
No off-street parking is required for an ADU converted from the house or an existing accessory structure, per the city's handout citing SBMC 17.60.210(A)(3)(k)(iii).
Does a converted garage need a new utility connection?
No. A new or separate connection, and related connection fees, aren't required for an ADU converted from existing space.
Do I lose the garage FAR exemption?
The garage exemption (200 sq ft per qualifying space, up to two) depends on clear parking spaces in the garage, so converting the garage generally means that exemption no longer applies to that space. We confirm the math with Planning.
Does a garage conversion ADU need parking in Solana Beach?
No. The handout says no off-street parking is required for an ADU converted from the house or an existing accessory structure.