Can I tap into equity on a new cons. home right after completion?

[Giselle Romero]

Long story short. Purchased the land with cash in 2020 for 60k. 

Put another 130k down on the actual build of the house.

Took out a 500k construction loans. Comps are about 800k.

Home is expected to be completed Feb-March. Which at that point I will need to take out another loan to pay off the construction loan. Can I request more than the 500k owed on the existing loan? I was considering using the funds for a pool but may just hold onto it to increase my liquid emergency funds.