I am considering building up on my fourplex. 2 additional units.

I would like to pull out equity from the homes to build either a house on each or an ADU (they are zoned multi-family) depending what makes the most sense on returns and what is feasible.

.$100k per building, I'd say not usually. 

Quote from @Zara Massoud: Hi, The PM company we signed on has a clause to add them as 'additional insured'.

The landlord should be named on the tenant's insurance policy for additional protection and to assist with tracking compliance.

Think if someone like Public Storage builds next door. 

If you sell a property, and do a 1031 exchange with the proceeds, but don't need all the proceeds for the down payment of the next property, are you taxed on the additional profit that isn't part of the exchange?

My goal is to leverage that equity for additional income.

Accessory Dwelling Units (ADUs) are an increasingly popular way to generate additional rental income on an existing property.

I'm an agent in addition to being an investor.