Most Colorado homeowners finance a $15,000 to $50,000+ deck with a HELOC or home equity loan at roughly 8–10% APR, or an unsecured personal loan at 9–18%. On a $20,000 deck, a 9% home equity loan over 10 years runs about $253 a month; a 12% personal loan over 5 years runs about $445 but costs less total interest.
A well-built composite deck in the Denver metro runs $15,000 to $50,000+ depending on size and height — real money, and most homeowners don't pay it out of a checking account. The routes homeowners take are fewer and simpler than the term suggests; here's each one, with its trade-offs. One note up front: we build decks, not financial advice — this is a map of the options; talk to your bank or a financial professional about what fits you.
The common routes
Home equity line of credit (HELOC). The most common way we see decks funded — you borrow against home equity as needed, typically at rates well below personal loans, and Front Range homeowners tend to have plenty of equity to work with. The trade-off: your house secures the debt, and rates can move.
Home equity loan. Same collateral, different shape — a fixed lump sum at a fixed rate with predictable payments. Suits a deck project well since you know the cost upfront, but less flexible than a HELOC if the scope grows.
Cash-out refinance. Made sense when rates were falling; in most 2026 scenarios, replacing a low-rate mortgage to fund a deck is expensive money. Worth running the numbers with a lender first.
Personal / home-improvement loan. Unsecured, fast to arrange, no lien on the house — and priced accordingly, with higher rates and shorter terms than equity products. Reasonable for smaller projects like a re-deck or a pergola addition, where the total is modest and speed matters.
Contractor-arranged financing. Some builders offer financing through third-party lenders — promotional "same-as-cash" periods with steep deferred interest are common in home improvement. Read the terms the way you'd read any loan; a legitimate offer survives comparison with your bank's.
Cash, staged. Plenty of clients phase the project: deck this year, cover or outdoor kitchen next. A good design anticipates the later phases — footings and framing placed so the pergola can land on them — cheaper than retrofitting and easier than financing everything at once.
(Haka doesn't offer in-house financing, deliberately — we'd rather compete on the deck than the loan. The financing page explains why.)
What each route costs in 2026
Rates move, and yours depends on credit, equity, and lender — but the relative order of these products is stable. Typical 2026 ranges:
| Route | Typical APR | Secured by your house? |
|---|---|---|
| HELOC | ~8–10%, variable | Yes |
| Home equity loan | ~8–10%, fixed | Yes |
| Cash-out refinance | Current mortgage rates — on your entire balance | Yes |
| Personal / home-improvement loan | ~9–18%, by credit score | No |
| Contractor-arranged promo | 0% for 12–18 months, then ~25–30% deferred | No |
Two readings: equity products win on rate because the house backs them — that's also their risk. And the contractor-promo line is only cheap if you retire the full balance inside the window; deferred-interest terms charge the back rate on the original amount from day one if you don't.
The math on a $20,000 deck
A 16×20 composite deck with railing lands in the middle of the $13,000–25,000 installed range, so $20,000 is a realistic number to run. Here's what it looks like monthly:
| How you fund $20,000 | Rate / term | Monthly payment | Total interest |
|---|---|---|---|
| Home equity loan | 9% fixed, 10 yrs | ~$253 | ~$10,400 |
| HELOC, repayment phase | 8–10% variable, 10 yrs | ~$243–264 | ~$9,100–11,700 |
| Personal loan | 12% fixed, 5 yrs | ~$445 | ~$6,700 |
The counterintuitive line is the personal loan: higher rate, less total interest, because the five-year term does more work than the three extra points cost — term length moves total cost more than rate does at these amounts. A HELOC's draw period is interest-only (~$150/month on $20,000 at 9%), which feels cheap until you notice the principal hasn't moved.
Financing a deck, step by step
However you fund it, the sequence that keeps a deck financing decision clean looks like this:
- Get the real number first. A lender quotes against a project cost, so start with a fixed, itemized bid — not a per-square-foot guess.
- Check your equity. Most Front Range homeowners who've owned a few years have enough equity for a HELOC or home equity loan; your current mortgage statement and a rough valuation tell you quickly.
- Price two offers. One equity product from your bank, one unsecured loan — comparing exactly two beats comparing zero or ten.
- Match the term to the deck. Borrowing fifteen years against a surface warrantied for twenty-five is sane; financing a builder-grade deck past its lifespan is not.
- Keep the contingency in cash. Finance the quote, hold ~10% back in savings for the change you'll want mid-build.
- Close while the paperwork runs. Permit applications and HOA review usually take 2–4 weeks before anyone breaks ground, and an equity product can take several weeks to close — start the loan when you sign the contract so both run in parallel.
Does a deck justify borrowing?
Two points. First, decks hold resale value well — cost-vs-value studies consistently put deck additions among the stronger outdoor returns, and in Colorado's outdoor-living market a finished composite deck reads as a straight asset. Second: the cheap deck is often the expensive one. A builder-grade deck that needs replacement in twelve years costs more per year of service than an engineered composite build that runs thirty. If borrowing is the difference between building once and building twice, the math can favor borrowing — run it for your own numbers.
Budget first, then finance
Whatever route you take to financing a deck, start with a real number instead of a guess: our deck cost calculator gives you a 2026 planning range in thirty seconds, and a free on-site consultation turns it into a firm quote you can actually take to a lender.
