@Robin Lee - CT just passed a law to make accessory dwelling unit rentals allowed by rite, not exception. 

complete renovation , kitchen , flooring , bathrooms , landscaping , painting and a luxurious accent wall and accessories throughout the house What was the outcome?

It's often referred to as accessory living space (without cooking facilities) or an accessory dwelling unit (if it has a full kitchen).Unfortunately, there are a lot of contractors that will just take your money and build it without permits, leaving you with an unpermitted and illegal addition that you might have to remove later on. 

Or are you looking for a full garage plus accessory dwelling unit (ADU) on top? 

@Steve Smith - ADU = Accessory Dwelling Unit (aka Mother-in-law unit)

Most legal multifamilies will be in DC proper, and typically in Columbia Heights, Capitol Hill, Trinidad, Deanwood, Anacostia, with a few other scattered through the other neighborhoods.Properties that have, or could have an ADU, Accessory Dwelling Unit can be an option as well.And the most popular strategy for house hacking in the area is the rent by the room strategy.

However, there is an additional unit in the garage 300 sqft (sort of ADU/Accessory Living Quarter).

The two properties are next door to a brand new development of 4 townhomes with garages, which are premium and coveted for the neighborhood.The contractor I hired is very eager to work on this project, he is excited that his name can be on a nice renovation for a growing neighborhood or Pittsburgh.

And in markets where there is a limited number of STR permits issued you can absolutely command a higher premium for your property because the buyer is buying not only the property but the highly coveted permit as well.

Purchase price: $920,000 Cash invested: $162,000 Sale price: $1,395,000 Contributors: Vlad Tselnik Welcome to the coveted community of Mount Baker!