ADU Financing Made Simple
Building an ADU is a significant investment — but it doesn't have to be financially overwhelming. We help you understand your options and connect you with the right lenders.
How Do Most People Pay for an ADU?
ADU projects in Twin Falls typically range from $80,000 for a garage conversion to $350,000+ for a larger detached unit. Most homeowners don't pay cash — they use one of several financing options, each with different advantages depending on your situation.
The two most common options are Home Equity Lines of Credit (HELOCs) and construction loans. Here's how they compare:
HELOC
Home Equity Line of Credit
A HELOC lets you borrow against the equity you've already built in your home. It works like a credit card — you draw what you need, when you need it, and only pay interest on what you've used.
Best for:
Homeowners with significant home equity who want flexible access to funds and lower upfront costs.
Advantages:
- ✓Flexible draw period — use what you need
- ✓Interest-only payments during draw period
- ✓Generally lower interest rates than personal loans
- ✓Potential tax deductions (consult your tax advisor)
- ✓Faster approval process than construction loans
Considerations:
- • Requires sufficient home equity (typically 15-20%)
- • Variable interest rates in most cases
- • Your home is the collateral
Construction Loans
Purpose-Built for Building Projects
Construction loans are specifically designed for building projects. Funds are released in stages (draws) as construction progresses, and the loan can convert to a permanent mortgage when the project is complete.
Best for:
Homeowners with limited equity or those who want a structured payment process tied to construction milestones.
Advantages:
- ✓Funds released in stages as work progresses
- ✓Can convert to a permanent mortgage
- ✓Designed specifically for construction projects
- ✓Lender oversight helps ensure project stays on track
- ✓May not require existing home equity
Considerations:
- • More complex application process
- • Requires detailed project plans and contractor info
- • Higher interest rates during construction phase
Other Financing Options
Cash or Savings
No interest, no applications, no monthly payments. If you have the cash available, this is the simplest path.
Cash-Out Refinance
Replace your existing mortgage with a larger one and use the difference for your ADU project. Works well when rates are favorable.
Combination
Many homeowners combine options — for example, a HELOC for design and permitting, then a construction loan for the build phase.
The ROI Makes It Work
An ADU isn't just an expense — it's an investment that pays you back. Here's how the numbers typically work:
We Include a Financing Checklist in Every Feasibility Check
As part of our ADU Feasibility + Budget Range service, you receive a personalized financing options checklist that includes lender recommendations, estimated monthly payments for different scenarios, and guidance on which financing approach makes the most sense for your specific situation and budget.
Important Note: We provide financing guidance and connect you with experienced lenders, but we are not financial advisors. Please consult with a financial professional for advice specific to your situation. All financing terms, rates, and approvals are subject to lender requirements and market conditions.
Let's Figure Out Your Financing
Start with a free Readiness Call. We'll discuss your budget, goals, and which financing path makes sense before you talk to a lender.