The first floor features a two-bedroom apartment complete with a living room and a bathroom.

Purchase price: $190,000 Cash invested: $69,225 Contributors: Taz Zettergren, Chris Clothier This home features 3 bedrooms, 2 bathrooms, a driveway, 1,140 sq. ft., and a single-family detached garage, built in 1989.

That's a low-return improvement, compared to say new bathrooms/kitchens.IMHO, if you expect to increase your net through rental and market appreciation, consider the length of time it will take to realize that goal—many years. 

Also are currently turning a Jack-and-Jill bathroom into two bathrooms, to add value.

This included updating the kitchen and bathrooms, improving the landscaping, and finishing the basement to maximize rental potential.

The guest bathroom could use a little updating.

The property is 3B1B and I plan to add an extra bathroom it 3B2B.

If you can find one with 2 bathrooms that is ideal.

Try looking into zillow/Redfin and see what your potential rents you can get near the neighborhood by filtering the bedrooms/bathrooms of the intentional property that you are planning to buy.

I added value by renovating the kitchen and bathrooms, updating the landscaping, and finishing the basement.