HELOC and second mortgages.

What a HELOC is

A home equity line of credit is a revolving line secured by your house. It is approved for a limit, and you draw from it when you need it rather than receiving the whole amount at once. What you have not drawn costs you nothing. As you pay it back down, the room comes back.

It sits behind your first mortgage as a second lien. Your existing loan is untouched: same lender, same terms, same servicer. That is the entire reason these exist. Refinancing a whole balance to get at a slice of equity is often the wrong trade, and a second lien is how you avoid making it.

HELOC or a fixed second mortgage

A home equity loan, sometimes called a closed-end second, hands you the money in one lump at closing and does not revolve. A HELOC revolves. The choice comes down to whether you know the number.

• You know the number. A single project with a signed contract, or a debt you are consolidating. A fixed second is usually cleaner.
• You do not know the number. A renovation in phases, tuition over several years, or a reserve you want available but do not intend to use. A line fits better.

What it gets used for

Renovations and additions. Consolidating higher-cost debt into one secured obligation. Tuition. Buying out a co-owner in a divorce or an inheritance. Bridging the gap when you are buying the next house before the current one sells. Covering a business need without liquidating investments.

What underwriting looks at

Three things carry most of the weight: how much equity you have after the new line is added to what you already owe, your credit profile, and whether your income supports both liens together. Occupancy matters too. A primary residence has the widest set of options, a second home fewer, and an investment property fewer still.

Questions people ask

Does a HELOC replace my mortgage?

No. It sits behind it. Your first mortgage keeps the terms it has and you keep paying it as normal.

HELOC or cash-out refinance?

If your first mortgage is on terms that would be hard to replace, a second lien usually wins because it leaves that loan alone. If you were going to refinance anyway, a cash-out can do both jobs in one loan. A loan officer can lay the two side by side for your file.

Do I need an appraisal?

Sometimes. Some programs accept an automated valuation on a straightforward property; others order a full appraisal. It depends on the program and the property, and your loan officer will tell you which one your file needs.

How much equity do I have?

Start with an automated estimate of what your home is worth and subtract every loan secured by it. That difference is your equity, and it is where this conversation begins.

Program availability varies by state, by occupancy and by property type. See Using your equity for how the four options compare.