@Vincent LudegnaAn ADU is an acronym for an “accessory dwelling unit”.

Therefore a two or three bedroom property cannot rent more than one bedroom at a time.The rental portion of the residence must be designated as an accessory use space.Must include the registration number in all advertisements.

Hi @Sam Leon I've looked at quite a few properties with Mother in laws/accessory suite/Accessory dwelling unit whatever you want to call it.

I am trying to add an accessory dwelling unit in San Francisco to a pre-rent control building and the city is requiring me to opt out of my Costa Hawkins rights in order to receive permission to build that extra unit.  

Using some of our own funds as well as the FHA 203(k), we renovated the house including an addition and converted the garage into an Accessory Dwelling Unit.

As communities prepare for an aging population, accessory dwelling units or MIL apartments are becoming more common in SFR zones.

Hey Rusty- Accessory Dwelling Unit (ADU) and Mother-In-Law (MIL).

I am shooting for a fourplex or possibly something with an accessory structure.

Many area allow accessory apartments which basically sounds like what your trying to do.  

Have you ever looked into adding a garage apt / accessory dwelling unit where a historic garage once stood?