Home equity & borrowing power
A quick estimate of how much you could borrow against your home to fund a renovation — then see how much of that spend you recoup at resale.
Return on Reno is not a lender, bank, or broker and does not offer credit. This is a planning estimate only — not a loan offer, quote, or financial advice. Borrowing limits, rates, and eligibility vary by lender and your circumstances; consult a qualified financial professional before borrowing.
How home-equity borrowing works
Your equity is your home's current value minus what you still owe on the mortgage. Lenders will usually let your combined borrowing reach a loan-to-value (LTV) limit — often 80–90% — across your existing mortgage plus any new borrowing. So your available headroom is roughly (home value × LTV) − mortgage balance. The lower your current LTV, the more you can typically access and the better the rate you'll be offered.
A worked example
Say your home is worth $400,000 and you owe $220,000. Your raw equity is $180,000, but you can't borrow all of it. At an 85% combined LTV limit, the most debt the lender will allow is $340,000 — so your borrowable headroom is $340,000 − $220,000 = $120,000. Push the limit to 90% and it rises to $140,000; drop to a conservative 80% and it falls to $100,000. Your income, credit score and the lender's rules then determine how much of that headroom you're actually offered.
Ways to fund a renovation with equity
| Option | How it works | Best for |
|---|---|---|
| Home-equity loan | Lump sum, fixed rate, fixed term (a "second mortgage"). | A one-off project with a known cost. |
| HELOC | Revolving credit line, usually variable rate; draw as you go. | Phased work or uncertain final cost. |
| Cash-out refinance | Replace your mortgage with a bigger one; pocket the difference. | When today's rates beat your current mortgage. |
| Personal / unsecured loan | No home as security; higher rate, shorter term. | Smaller projects or little available equity. |
Rates and limits vary by lender, product, and your credit — treat these as a starting point, not an offer.
How much can you tap by LTV limit
| Combined LTV cap | Max total debt on a $400k home | Headroom if you owe $220k |
|---|---|---|
| 80% (conservative) | $320,000 | $100,000 |
| 85% (common) | $340,000 | $120,000 |
| 90% (aggressive) | $360,000 | $140,000 |
How much equity do you actually have
The number the calculator gives you is your theoretical borrowing headroom. In practice, the gap between paper equity and accessible equity can be significant, and understanding that gap matters before you call a lender.
Paper equity vs. accessible equity
Paper equity is straightforward: home value minus mortgage balance. If your home is worth $500,000 and you owe $280,000, your paper equity is $220,000. But no lender will let you borrow all $220,000. They cap combined loan-to-value at 80–90%, which means the most debt they'll allow against a $500,000 home is $400,000–450,000. Subtract your existing $280,000 mortgage and your accessible headroom is $120,000–170,000 — roughly 55–77% of your paper equity.
Appraisals vs. online estimates
Zillow, Redfin, and similar tools estimate your home's value from public data — sales of nearby homes, tax assessments, listing history. These automated valuations can be surprisingly accurate in cookie-cutter subdivisions where lots of comparable sales exist. But in unique homes, rural areas, or rapidly changing markets, they can be off by 10–20%. A lender won't use an automated estimate; they'll order a licensed appraisal, which costs $300–600 and can return a number meaningfully different from what you expected. If the appraisal comes in low, your borrowing ceiling drops with it. It's worth checking recent sold prices for similar homes on your street before assuming Zillow's number will hold up.
Why lenders won't lend 100% of equity
The LTV cap exists to protect the lender — and, indirectly, you — against falling home prices. If you borrowed 100% of your equity and the market dropped 10%, you'd owe more than the home is worth. By capping at 80–90%, lenders build in a buffer. Borrowers with excellent credit and strong income sometimes access 90% combined LTV; most offers cluster around 80–85%. The lower the combined LTV, the better the rate you'll typically be offered, because the lender's risk is lower.
When borrowing against your home makes sense for a renovation
Home-equity borrowing isn't inherently good or bad — it depends on the specifics. Five conditions, taken together, make a strong case for using equity to fund a renovation.
The interest rate is lower than unsecured alternatives
Because your home secures the loan, equity-based products typically carry interest rates 3–6 percentage points below personal loans or credit cards. On a $40,000 renovation, the difference between 7% (home equity loan) and 12% (personal loan) over seven years is roughly $8,000 in total interest. That saving alone can justify using equity — but only if the other conditions also hold.
The project adds lasting value
Borrowing to renovate makes more financial sense when the project adds durable value to the home. A kitchen remodel that recoups 60–80% of its cost at resale is a better use of equity than a highly personalised feature that appeals only to you. Check the expected return on the ROI calculator before deciding — projects that recoup less than 40% might be worth doing for lifestyle reasons, but the financial case for borrowing to fund them is weaker.
The monthly payment fits your budget
Run the numbers in the renovation loan calculator to see the monthly obligation. A good rule of thumb is that your total housing costs — mortgage, property tax, insurance, plus any new equity payment — should stay below 28–32% of gross monthly income. If the new payment pushes you past that, consider a smaller project or a longer term.
You plan to stay long enough to benefit
If you're planning to sell in the next year or two, borrowing against equity to renovate only makes sense if the project clearly lifts the sale price by more than it costs (including interest and closing costs on the loan). If you plan to stay five years or more, you get both the lifestyle benefit and the eventual resale value, making the calculus more forgiving.
A note on tax deductibility
In the US, interest on home-equity debt used to "buy, build, or substantially improve" the home that secures the loan may be tax-deductible, subject to limits. This can reduce the effective cost of borrowing. However, the rules are specific and change — consult a tax advisor to confirm whether your project qualifies and whether the deduction is meaningful given your tax situation.
Risks of using home equity for renovations
The low rates on equity products exist because you're pledging your home as security. That trade-off deserves a clear-eyed look.
Your home is the collateral
If you default on a home-equity loan or HELOC, the lender can foreclose. This is the fundamental difference from a personal loan or credit card — failure to pay doesn't just damage your credit, it puts your housing at risk. Borrow only what you can comfortably repay even if your income drops or expenses rise unexpectedly.
Over-leveraging in a declining market
If you borrow to 85% LTV and the market then drops 15%, you're underwater — you owe more than the home is worth. You can still live in the house and keep paying, but selling becomes painful because you'd need to bring cash to closing. This risk is higher when home prices are near cyclical peaks or when the local market depends heavily on a single employer or industry.
Variable rates on HELOCs
Most HELOCs carry variable interest rates tied to the prime rate. A payment that's comfortable at 7% can become a strain at 10% if rates rise. If you choose a HELOC, stress- test the monthly payment at 2–3 percentage points above today's rate. If that payment is too high, consider a fixed-rate home equity loan instead, or borrow less.
Being house-rich and cash-poor
It's possible to have $200,000 in equity and $3,000 in the bank. Borrowing against equity to renovate can make you even more asset-heavy and cash-light. Make sure you still have an adequate emergency fund — three to six months of expenses — after accounting for the new payment. A beautiful kitchen doesn't help if a car repair or medical bill sends you into financial stress.
Before you borrow
Two checks are worth doing first. Estimate the monthly repayments on any new borrowing with the renovation loan calculator, and confirm the project actually pays back with the ROI calculator — some renovations recoup most of their cost at resale, others far less. If you're weighing how much to spend in the first place, the renovation budget calculator gives a sensible range for your home's value.
Frequently asked questions
How much equity can I borrow against my home?
Most lenders let your total borrowing (existing mortgage plus new) reach 80–90% of your home's value. So if your home is worth $400,000 and you owe $220,000, at an 85% limit you could access roughly (400,000 × 0.85) − 220,000 = $120,000 of headroom — subject to your income and credit.
What's the difference between a HELOC, a home-equity loan, and a cash-out refinance?
A home-equity loan is a lump sum at a fixed rate repaid over a set term. A HELOC is a revolving credit line you draw on as needed, usually at a variable rate. A cash-out refinance replaces your existing mortgage with a larger one and pays you the difference. Which is cheapest depends on your current mortgage rate and how you'll spend the money.
What is loan-to-value (LTV) and why does it matter?
LTV is your total mortgage debt divided by your home's value. Lenders cap combined LTV (typically 80–90%) to protect themselves if prices fall, so the lower your LTV, the more you can borrow and usually the better the rate. Borrowing above 80% can also trigger private mortgage insurance in some markets.
Should I borrow against my home to renovate?
It can make sense when the project adds lasting value or usability and the repayments fit your budget — but you're putting your home up as security. Estimate the monthly cost with the renovation loan calculator and check the project earns its keep with the ROI calculator before committing.
Does the renovation itself increase my borrowing power?
Often yes, over time: a project that raises your home's appraised value increases your equity, which can expand future borrowing. But lenders base the initial loan on the current value, so you generally can't borrow against value the renovation hasn't created yet.
An estimate only. Actual borrowing limits depend on the lender, your income, credit, and the product. This is not a loan offer or financial advice. Reviewed July 2026.
Know the return, too
Borrowing to renovate makes most sense when the project pays you back. See how much it does.
Open the ROI calculator →