My understanding, based on research and a few email exchanges with the City, is the following: - I can use or build a detached ADU if the property has the right zoning designation (B1, C1, etc) and meets the minimum lot size requirements (while I am living in the primary residence).

Out door detached porch or storage area.

Long story short I got a tour of the property, a 3 bed, 1 bathroom house with detached garage which fits nicely within my rental property criteria.  

We have a nice 4 bd/3ba detached home that we will be putting up for rent.

I commend you for your determination, perseverance, and impetus to stay focused on your goals in light of your adversities and obstacles in life.The best thing I can tell you is this...as an investor starting out, I would do these 3 things:1) Take advantage of the wealth of information available to you here on BiggerPockets. 

Most people would rather live in a detached unit of a multifamily than an attached unit...I currently live in one of my multifamily properties that has a shared wall which is perfectly fine with me but currently looking for the next place and ideally it would be detached units for more privacy...Duplexes  generally tend to be smaller here in San Diego (2 bed/ 1 bath units are most common) and those with families and kids tend to want atleast a 3bed/2bath which maxes a single family home with an Accessory Dwelling Unit (ADU) more attractive.

Hi BP, I currently have 4 conventional loans (1 condo primary residence, 3 SFR investment properties) and am trying to potentially refinance a free & clear 5th detached SFR investment property.

It is worth what YOU can buy it for and safely make a return on it that you can live with, even if you run into some obstacles working through your turnaround plan.My intent isn't to sound cocky in my response.  

Hello, I would like some advice on a property that my family owns.It is two SFR's on one lot (detached) in LA County that was bought in the early 80's and is now owned free and clear. 

Detached Structures: for other buildings on the property (ie. sheds & detached garages)Again, there is normally an included limit of 10% of the building limit.