--- title: "How to Finance a Build Without Touching Your Low-Rate Mortgage | Addicted to ROI" description: "HELOC seconds, DSCR construction loans, private money: how we fund ADU and duplex builds while protecting 4% first mortgages, plus the 70% refi rule." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "@id": "https://addictedtoroi.com/#organization", "name": "Addicted to ROI", "url": "https://addictedtoroi.com", "logo": { "@type": "ImageObject", "url": "https://addictedtoroi.com/images/logo.png" }, "description": "Live your best life funded by your investments. Real estate, taxes, travel, and business, by Jennifer Beadles.", "founder": { "@id": "https://addictedtoroi.com/#jennifer" }, "sameAs": [ "https://agentsinvest.com", "https://doorprofit.com", "https://repstime.com", "https://strhours.com", "https://kidspayroll.com", "https://rentstager.com" ] }, { "@context": "https://schema.org", "@type": "WebSite", "@id": "https://addictedtoroi.com/#website", "url": "https://addictedtoroi.com", "name": "Addicted to ROI", "publisher": { "@id": "https://addictedtoroi.com/#organization" }, "potentialAction": { "@type": "SearchAction", "target": { "@type": "EntryPoint", "urlTemplate": "https://addictedtoroi.com/blog/?q={search_term_string}" }, "query-input": "required name=search_term_string" } }, { "@context": "https://schema.org", "@type": "Person", "@id": "https://addictedtoroi.com/#jennifer", "name": "Jennifer Beadles", "url": "https://addictedtoroi.com/about/", "jobTitle": "Founder, Addicted to ROI", "description": "Real estate investor and founder of Addicted to ROI. Built an 8-figure rental portfolio across multiple states and teaches everyday investors how to build passive income.", "worksFor": { "@id": "https://addictedtoroi.com/#organization" }, "sameAs": [ "https://agentsinvest.com", "https://doorprofit.com", "https://repstime.com", "https://strhours.com", "https://kidspayroll.com", "https://rentstager.com" ] }, { "@context": "https://schema.org", "@type": "Article", "mainEntityOfPage": { "@type": "WebPage", "@id": "https://addictedtoroi.com/blog/financing-builds/" }, "headline": "How to Finance a Build Without Touching Your Low-Rate Mortgage", "description": "HELOC seconds, DSCR construction loans, private money: how we fund ADU and duplex builds while protecting 4% first mortgages, plus the 70% refi rule.", "image": "https://images.unsplash.com/photo-1560518883-ce09059eeffa?w=800&q=80", "datePublished": "2026-07-09", "dateModified": "2026-07-09", "author": { "@id": "https://addictedtoroi.com/#jennifer" }, "publisher": { "@id": "https://addictedtoroi.com/#organization" }, "speakable": { "@type": "SpeakableSpecification", "cssSelector": [ ".tldr-answer", "h1" ] } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://addictedtoroi.com" }, { "@type": "ListItem", "position": 2, "name": "Blog", "item": "https://addictedtoroi.com/blog" }, { "@type": "ListItem", "position": 3, "name": "Investment Strategies", "item": "https://addictedtoroi.com/blog?category=investment-strategies" }, { "@type": "ListItem", "position": 4, "name": "How to Finance a Build Without Touching Your Low-Rate Mortgage", "item": "https://addictedtoroi.com/blog/financing-builds/" } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What's the best way to finance an ADU build?", "acceptedAnswer": { "@type": "Answer", "text": "In order: your own cash or a HELOC (no draw process, lowest cost), private money (flexible and cheaper than institutional construction debt), then DSCR construction loans (100% of purchase plus 80-85% of build, ~75% of ARV, at 8.5-12%). Owner-occupants should look at HomeStyle/203(k) renovation loans first." } }, { "@type": "Question", "name": "What is the 70% rule for build-to-rent?", "acceptedAnswer": { "@type": "Answer", "text": "Keep all-in build cost under roughly 70% of the finished appraised value. At that ratio a cash-out refinance returns your invested capital and the property still cash flows: a BRRRR, but new construction." } }, { "@type": "Question", "name": "Do I need my mortgage lender's permission to build an ADU?", "acceptedAnswer": { "@type": "Answer", "text": "Generally no; you're improving their collateral. Permission problems only arise when you want to carve off and sell part of the secured property (partial reconveyance) or demolish a structure securing the loan. Read your deed of trust before either." } }, { "@type": "Question", "name": "Should I condo my new unit right away?", "acceptedAnswer": { "@type": "Answer", "text": "Usually not if you're holding. One loan can cover both units, while condoing triggers reassessment and per-unit insurance. Prepare the condo map, then record it just before selling to capture the separate retail values." } } ] } ] --- [![Addicted to ROI](/images/logo.png)](/) [Travel](/pillars/travel/)[Real Estate](/pillars/real-estate/)[Tax Savings](/pillars/tax-savings/)[Business](/pillars/business/)[Paths](/paths/)[Blog](/blog/)[Tools](/tools/)[Apps](/software/)[About](/about/) [Login](https://members.addictedtoroi.com/) Subscribe [Travel](/pillars/travel/)[Real Estate](/pillars/real-estate/)[Tax Savings](/pillars/tax-savings/)[Business](/pillars/business/)[Paths](/paths/)[Blog](/blog/)[Tools](/tools/)[Apps](/software/)[About](/about/)[Login](https://members.addictedtoroi.com/) Contents 1. [01 The Ranking: Cash or HELOC, Then Private, Then DSCR ](#the-ranking-cash-or-heloc-then-private-then-dscr) 2. [02 The Rule That Decides the Exit: 70% of ARV ](#the-rule-that-decides-the-exit-70-of-arv) 3. [03 Three Structural Details That Save Real Money ](#three-structural-details-that-save-real-money) 4. [04 FAQ ](#faq) [Home](/)/ [Blog](/blog/)/ [Real Estate](/pillars/real-estate/) Investment Strategies # How to Finance a Build Without Touching Your Low-Rate Mortgage HELOC seconds, DSCR construction loans, private money: how we fund ADU and duplex builds while protecting 4% first mortgages, plus the 70% refi rule. July 9, 2026 8 min read Contents 1. [01\. The Ranking: Cash or HELOC, Then Private, Then DSCR](#the-ranking-cash-or-heloc-then-private-then-dscr) 2. [02\. The Rule That Decides the Exit: 70% of ARV](#the-rule-that-decides-the-exit-70-of-arv) 3. [03\. Three Structural Details That Save Real Money](#three-structural-details-that-save-real-money) 4. [04\. FAQ](#faq) tl;dr We fund builds with cash or a HELOC first, private money second, and DSCR construction loans last, so our 4% first mortgages never get touched. The exit rule: keep all-in build cost under about 70% of finished value and a cash-out refinance returns your capital while the property still cash flows. It's a BRRRR, just new construction. We refinanced essentially our whole portfolio between 2020 and 2022 into roughly 4% loans, and those notes are family heirlooms now: we don't touch them. Which raises the obvious question on every build project: if you won't cash-out refinance the low-rate loans, where does construction money come from? Here's the full stack, ranked the way we actually use it, plus the math rule that decides how every project ends. ## The Ranking: Cash or HELOC, Then Private, Then DSCR First choice: your own cash or a HELOC. [HELOCs are back](/blog/helocs-are-back/), and for construction they have a superpower beyond rate: no draw process. Construction loans reimburse you after appraisals, inspections, and paperwork; a HELOC just lets you pay the subs and keep building. The investment-property realities: most banks cap second-position HELOCs at around 60% combined LTV, they're almost exclusively local banks, and every one we've used wanted a deposit relationship first: I've never found a bank that does this without one. Every commercial banker wants all your accounts; I'll give them two, and it's all a negotiation (a $100K deposit relationship has been worth a quarter point off a rate). We cross-collateralize across properties to get lines sized for real projects. Second choice: private lenders. Flexible on collateral (the build property, other properties, whatever you agree on) and reliably cheaper than DSCR construction money. Don't discount them; build the relationships before the project ([how that debt compares to equity](/blog/debt-partner-vs-equity-partner/)). Third choice: DSCR construction loans. Asset-based, underwritten on the finished unit's rent and value. Typical structure: about 100% of purchase price plus 80 to 85% of build cost, capped near 75% of after-repair value, with pricing that lives in hard-money territory: 8.5% on a good day, more like 10 to 12%, plus a point or more. Experience-based: your terms improve with completed projects. It works, and it's the most expensive tool in the drawer, so it's last. For owner-occupants there's a cheat code the pros barely mention: Fannie Mae HomeStyle and FHA 203(k) renovation loans wrap build costs into your mortgage based on future value. If you'll live in the front house while building the back unit, start there. ## The Rule That Decides the Exit: 70% of ARV Think of the whole play as a BRRRR, but new construction. The target that makes it self-funding: all-in build cost under about 70% of the finished value. Under that line, you can do a full cash-out refinance, recover your invested cash, and most likely still cash flow. Our own version is more conservative: I keep the portfolio around 50% LTV, pay ourselves back the invested cash, and prioritize cash flow over maximum extraction. The payoff shows up at the bank: when lenders see our schedule of real estate, approvals are nearly automatic, while friends who maxed every property fight for every new loan. Leverage spends the same either way; borrowing capacity is the asset nobody prices. ## Three Structural Details That Save Real Money You don't need your lender's permission to build on your own lot. Adding units to their collateral benefits them. The exception is a partial reconveyance (carving off and selling part of the collateral): a local portfolio bank might work with you, but good luck with a conventionally serviced mortgage. Time the condo, don't default to it. You can hold both units on one loan without ever condoing, or complete the condominium and finance the front and back separately. It's not always advantageous to complete the condo on a long-term hold ([the tax and insurance consequences are real](/blog/condo-conversion/)); we prepare the condo paperwork and pull the trigger right before an exit, when the separate values get captured. Watch HELOC seconds on anything you might sell. The bank wants its payoff at closing, and layered liens make sales messier. Think a move ahead before securing a line against a property with a shorter hold horizon. Every dollar of this is in service of one philosophy: I want every single dollar to go to work for me every single day. Idle cash loses to inflation, untapped equity earns nothing, and the spread between what your assets could produce and what they're producing is the quietest cost in your portfolio. ## FAQ **Q: What's the best way to finance an ADU build?** A: In order: your own cash or a HELOC (no draw process, lowest cost), private money (flexible and cheaper than institutional construction debt), then DSCR construction loans (100% of purchase plus 80-85% of build, ~75% of ARV, at 8.5-12%). Owner-occupants should look at HomeStyle/203(k) renovation loans first. **Q: What is the 70% rule for build-to-rent?** A: Keep all-in build cost under roughly 70% of the finished appraised value. At that ratio a cash-out refinance returns your invested capital and the property still cash flows: a BRRRR, but new construction. **Q: Do I need my mortgage lender's permission to build an ADU?** A: Generally no; you're improving their collateral. Permission problems only arise when you want to carve off and sell part of the secured property (partial reconveyance) or demolish a structure securing the loan. Read your deed of trust before either. **Q: Should I condo my new unit right away?** A: Usually not if you're holding. One loan can cover both units, while condoing triggers reassessment and per-unit insurance. Prepare the condo map, then record it just before selling to capture the separate retail values. * * * _I'm not a financial advisor, and this isn't lending advice. Loan structures, LTVs, and terms vary by lender and state; verify everything with your own lenders and professionals._ Addicted to ROI is education and community, not financial or tax advice. Talk to a qualified professional before making investment or tax decisions. ![Jennifer Beadles](/images/founders.jpg) Jennifer Beadles Real estate entrepreneur with 17 years of hands-on investing experience. Built an 8-figure rental portfolio across multiple states and has helped thousands of investors build passive income through the Addicted to ROI community. The tool that goes with this ## The software that does this for you [ Deal analysis DoorProfit Type in a price and watch cash flow, cash-on-cash, cap rate and NOI move in real time, then save, compare and share underwriting across your whole pipeline. Analyze a deal ↗ ](https://doorprofit.com)[ Agent match Agents Invest Tell us the market and the strategy, and we match you with a vetted, investor-friendly agent who knows how to run a rental analysis, not just sell you a house. Match me with an agent ↗ ](https://agentsinvest.com) Before you close the tab ## Get the next one in your inbox. One email per new article, the day it goes up. No wall, no spam, unsubscribe in a click. [Subscribe, free →](/newsletter/)[Run a deal in the calculator](/tools/deal-analysis-calculator/) Read next [ ![How to Renovate a Rental You've Never Seen in Person](https://images.unsplash.com/photo-1581578731548-c64695cc6952?w=800&q=80) Investment Strategies ### How to Renovate a Rental You've Never Seen in Person 10 min read → ](/blog/renovate-out-of-state/)[ ![How to Determine Fair Market Rent in a Market You Don't Live In](https://images.unsplash.com/photo-1554469384-e58fac16e23a?w=800&q=80) Deal Analysis ### How to Determine Fair Market Rent in a Market You Don't Live In 8 min read → ](/blog/fair-market-rent/)[ ![The Questions to Ask Before You Buy in a Market You Don't Live In](https://images.unsplash.com/photo-1423666639041-f56000c27a9a?w=800&q=80) Due Diligence ### The Questions to Ask Before You Buy in a Market You Don't Live In 9 min read → ](/blog/market-call-questions/) If you like this ## Read these next Hand-picked to go deeper on real estate. [![How to Renovate a Rental You've Never Seen in Person](https://images.unsplash.com/photo-1581578731548-c64695cc6952?w=800&q=80) Real Estate ### How to Renovate a Rental You've Never Seen in Person 10 min read](/blog/renovate-out-of-state/) [![How to Determine Fair Market Rent in a Market You Don't Live In](https://images.unsplash.com/photo-1554469384-e58fac16e23a?w=800&q=80) Real Estate ### How to Determine Fair Market Rent in a Market You Don't Live In 8 min read](/blog/fair-market-rent/) [![The Questions to Ask Before You Buy in a Market You Don't Live In](https://images.unsplash.com/photo-1423666639041-f56000c27a9a?w=800&q=80) Real Estate ### The Questions to Ask Before You Buy in a Market You Don't Live In 9 min read](/blog/market-call-questions/) [![How to Invest Out of State Without Getting Burned (The One Trap)](https://images.unsplash.com/photo-1500382017468-9049fed747ef?w=800&q=80) Real Estate ### How to Invest Out of State Without Getting Burned (The One Trap) 8 min read ](/blog/invest-out-of-state/) Off to go build something. Go build yours.  ~ Jennifer © 2026 Addicted to ROI. Education and community, not financial or tax advice. [Contact Us](/contact/) · [Privacy Policy](/privacy/) · [Terms and Conditions](/terms/) Explore: [Travel](/pillars/travel/) · [Real Estate](/pillars/real-estate/) · [Tax Savings](/pillars/tax-savings/) · [Business](/pillars/business/) Free tools: [Deal Analysis Calculator](/tools/deal-analysis-calculator/) · [Cost Segregation Calculator](/cost-seg-calculator/) · [Average Stay Calculator](/average-stay-calculator/) · [Vehicle Deduction Calculator](/vehicle-deduction-calculator/) · [Free Downloads](/resources-downloads/) [Agents Invest](https://agentsinvest.com) · [DoorProfit](https://doorprofit.com) · [REPS Time](https://repstime.com) · [STR Loophole](https://strhours.com) · [Kids Payroll](https://kidspayroll.com) · [RentStager](https://rentstager.com)