ADU FinancingOptions

Cash-Out Refinancing to Pay for an ADU

A cash-out refinance pays off your current mortgage with a new, larger one and gives you the difference in cash to build. You end up with one loan and one payment. It makes the most sense when your current mortgage rate is not one you would fight to keep.

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How a cash-out refinance pays for an ADU

The lender appraises your home, sets a new loan amount based on part of its current value, and pays off your existing mortgage at closing. What is left over comes to you as cash for the ADU.

Two things decide whether that is a good trade. First, your old rate disappears. The new rate applies to the entire balance, not just the ADU money, so swapping a low rate for a higher one can cost far more than the build. Second, closing costs are charged on the whole new loan, which makes this an expensive way to borrow a small amount.

If your current rate is already high, both problems shrink, and one loan can be simpler than two.

At a glance

  • Best for: owners whose current mortgage rate is not worth keeping
  • How money arrives: one lump sum at closing
  • Rate type: fixed or adjustable, like any mortgage
  • What lenders check: credit, income, current value and an appraisal

Cash-out refinance pros and cons for an ADU

Pros

  • One loan and one payment instead of two
  • First mortgage pricing, usually below second lien pricing
  • Can replace a high rate mortgage at the same time
  • Long terms keep the monthly payment lower

Cons

  • You give up your current mortgage rate
  • Closing costs apply to the whole new loan
  • Borrowing is capped by today's value, not the finished ADU
  • Your loan term may start over

When another loan fits better

If your current rate is worth keeping, a HELOC or a home equity loan leaves it alone and borrows only the ADU money. If you are a veteran, a VA cash-out refinance may be an option worth pricing.

Cash-out refinance for an ADU questions

What is the cheapest way to borrow money against your house?

It depends on your current mortgage. If its rate is low, a HELOC or home equity loan usually costs less overall because you borrow only what you need. If its rate is high, a cash-out refinance can come out ahead.

Should I refinance to build an ADU?

Compare total cost, not monthly payment. Add the closing costs to the extra interest on your whole balance, then compare that with a second loan for just the ADU budget. Whichever costs less over the time you will keep it usually wins.

Does a cash-out refinance restart my mortgage term?

Usually, yes, unless you choose a shorter term. A fresh long term lowers the payment but can add years of interest. Ask your lender to show both options.

Talk to a lender who finances ADUs

Tell us about your current mortgage, your project and your timeline. We will connect you with a lender who can price a cash-out refinance against your other options so you can compare real terms.

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