HELOC in Charleston SC: How to Tap Your Home Equity in 2026
A HELOC lets Charleston homeowners borrow against their equity without giving up a low first-mortgage rate. Most lenders let you borrow up to about 80% of your home’s value, minus what you owe. The national average HELOC rate was 7.36% on October 21, 2026, according to Bankrate, and HELOC rates usually move with the Fed.
With Charleston County single-family prices near $715,000, many local owners have built real equity. If you want to fund a renovation, storm hardening, or a big expense this fall, here’s how to decide whether a HELOC is the right tool.
Key Takeaways
- Keep your low rate: a HELOC is a second loan, so your first mortgage stays the same.
- Borrowing limit: most lenders cap combined loans at about 80% of value; some go to 85%–90%.
- Rates are variable: Bankrate’s national average was 7.36% on October 21, 2026, after five straight weekly increases.
- Interest may be deductible only if you use the money to buy, build, or substantially improve the home.
- Charleston equity is real: Charleston County’s September single-family median was $715,000, up 1.6% from a year ago.
How Much Home Equity Do Charleston Owners Have?
Charleston Trident Association of REALTORS® data for September 2026 shows prices are holding steady:
| Area (September 2026) | Median sale price | Change vs. a year ago |
|---|---|---|
| CTAR region, all homes | $425,000 | +0.7% |
| Charleston County, single-family | $715,000 | +1.6% |
| Berkeley County, single-family | $430,000 | +4.9% |
| Dorchester County, single-family | $392,000 | −2.0% |
The region also had about 3.6 months of supply and a median of 55 days on market. Read more in our Charleston housing market fall 2026 report.
How Much Can You Borrow With a HELOC?
Here’s a simple example using an 80% combined loan-to-value (CLTV) limit:
| Step | Example |
|---|---|
| Home value (appraised) | $600,000 |
| 80% of value | $480,000 |
| Minus current mortgage balance | −$330,000 |
| Possible HELOC line | $150,000 |
Your actual line depends on the appraisal, your credit, your income and debts, and each lender’s limits. Most HELOCs have a draw period (often 10 years) when you can borrow and may pay interest only, followed by a repayment period when payments rise to cover principal.
HELOC vs. Home Equity Loan vs. Cash-Out Refinance
| Option | Rate type | Best when |
|---|---|---|
| HELOC | Usually variable | You’ll borrow over time, like a phased renovation |
| Home equity loan | Usually fixed | You need one lump sum and want a set payment |
| Cash-out refinance | New first mortgage | Your current rate is close to today’s rates, or you need to pay off a large balance |
With the average 30-year fixed at 7.33% on October 26 (Mortgage News Daily), a cash-out refinance would replace your whole mortgage at today’s rate. If your current rate is much lower, a second loan is usually the better math.
What Are HELOC Rates Doing Right Now?
Bankrate’s national average HELOC rate was 7.36% as of October 21, 2026, with offers ranging from 3.99% to 11.85% depending on the lender and borrower. That was the fifth straight weekly increase (Bankrate). Most HELOCs are tied to the prime rate, which tends to follow the Federal Reserve. The Fed raised rates in September and meets again October 27–28, so ask any lender about rate caps and whether you can lock part of your balance at a fixed rate.
Demand is growing: Equifax reported HELOC originations through July 2026 were up 6.6% from a year earlier.
What Are Smart Ways to Use Equity in Charleston?
- Storm hardening and repairs: roof upgrades, impact windows, and elevation work can protect your home. Some may also lower insurance costs, so ask your agent. If your home is in a flood zone, see our Charleston flood zone guide.
- Historic home projects: older homes downtown and in nearby neighborhoods may need careful upgrades. Our historic home buying guide covers review rules.
- Adding space instead of moving and buying at today’s rates.
Use care with spending that doesn’t add value, like vacations. Your home secures the line.
Is HELOC Interest Tax-Deductible?
According to IRS Publication 936, interest on home equity debt is generally deductible only if the money is used to buy, build, or substantially improve the home that secures the loan. It also counts toward the $750,000 limit on qualifying mortgage debt ($375,000 if married filing separately). Using a HELOC to pay off credit cards does not qualify. Talk with your tax advisor.
Frequently Asked Questions
What is a HELOC?
A home equity line of credit is a revolving line secured by your home. You draw what you need during the draw period, pay interest on what you use, and repay the balance over time.
How much can I borrow with a HELOC in Charleston?
Many lenders allow combined loans up to about 80% of your home’s value, and some go to 85% to 90%. Subtract your mortgage balance from that amount to estimate your line.
What is the average HELOC rate right now?
Bankrate reported a national average of 7.36% as of October 21, 2026, with offers from 3.99% to 11.85%. Your rate depends on credit, equity, and the lender.
Will a HELOC change my first mortgage rate?
No. A HELOC is a separate second loan, so your existing first mortgage and its rate stay the same.
Is HELOC interest tax-deductible?
Per IRS Publication 936, generally only if the funds are used to buy, build, or substantially improve the home that secures the loan, within the $750,000 debt limit. Check with a tax advisor.
Should I get a HELOC or a cash-out refinance?
If your current rate is well below today’s 30-year average of 7.33%, a HELOC or home equity loan usually keeps your costs lower. A cash-out refinance may make sense if your rate is already near today’s rates.
Talk With Our Charleston Team
Call Coastal Funding Corporation at (843) 212-6200 or visit www.charlestonmtg.com to talk with a licensed loan officer. We’re available 9 a.m. to 9 p.m., seven days a week, and we’ll compare home equity options from multiple lenders.
About Coastal Funding Corporation in Charleston
Coastal Funding Corporation (NMLS 103035) is a mortgage broker helping Charleston and Lowcountry buyers compare loan options from multiple wholesale lenders, with a local office on James Island. We help with purchases and refinances using conventional, FHA, VA, USDA and jumbo loans, plus DSCR loans for investment properties. This article was written by our team and reviewed for accuracy as of the date shown.
Sources: Charleston Trident Association of REALTORS® September 2026 market report (ShowingTime, October 9, 2026; Charleston Regional Business Journal, October 16, 2026); Bankrate HELOC rates, October 21, 2026; Equifax via Bankrate; Mortgage News Daily, October 26, 2026; IRS Publication 936.
Coastal Funding Corporation | NMLS 103035 | (843) 212-6200 | www.charlestonmtg.com. Equal Housing Opportunity. This is not a commitment to lend. All loans are subject to credit approval, underwriting guidelines, and property eligibility. Rates, terms, and programs are subject to change without notice. Market and rate figures cited are third-party data as of the dates shown and are not quotes or offers from Coastal Funding Corporation. This article is not tax advice. Verify our license at NMLS Consumer Access.