2nd Lien Construction Loans for an addition?

[Landon Miller]

Deciding to renovate my personal residence instead of trying to buy in this market again (Denver). Rates have gone through the roof so I am trying to research the possibility for a 2nd lien construction loan. I want to keep the rate on my 1st but need money for an addition (adding master bedroom/bathroom/kitchen remodel/ updating flooring and probable sewer line). Trying to keep it smart and have the total notes outstanding to 80% ARV.

That seems to be the kicker with a standard Cash-Out that the lender won't use ARV and I was steered towards construction loans, either way I just want to keep the rate on the 1st but need a lender who would take a 2nd lien using ARV values, still staying at 80% total loan to value.

Does anyone have any experience with something like this?