Request a lower interest rate on current mortgage before refi

[Andrew S.]

Hey BP,

With the recent lower interest rates dropping, I'm considering doing a refi on my house hack duplex.  I currently have a 30 yr @ 4.75% and am considering going to a 15 yr 3.25% with my local bank.  I'm considering asking my current mortgage bank for a lower interest rate (ideally without closing costs) or I'll be doing a refi with my local bank.  Anyone had success with this?  My local banker actually recommended this to avoid closing costs.

Thanks,

Andrew