Conventional loan How did you add value to the deal?

First time buyer loan with 11% down.

Quote from @Sri Reddy: We are a team who are venturing in to constructing a multifamily unit from groundup.We don't have any prior experience in construction and are looking for financing loan options.

construction loan How did you add value to the deal?

To qualify for non-recourse commercial loans through Fanny and Freddy you have to have equal new worth to the loan amount and 10% liquidity. 

I got a PA for 300k/FHA loan. 720+ credit score, 75k cash, and good income.

Lastly, land development requires solid planning and capital, so getting the right development loan with flexible terms will be vital for success.

I would look at the DSCR loan as the first option.By the way, I suspect you are going to be disappointed by any refi appraisals   ADUs typically appraise poorly   JADUs can lower the property value Vs having the space as part of the primary unit.  

Conventional Loan

Use a home equity loan (fixed debt) instead of a HELOC (variable equity) and build an additional unit you can rent out in your own backyard.