Top Bank Statement HELOC Providers for an Accessory Dwelling Unit

The Quick Read: No single provider is the best for every borrower, because the program that fits your accessory dwelling unit (ADU) depends on your occupancy, equity, credit profile, and how you document income. A broker shops several wholesale lenders and matches your file to the program that fits. Lendmire is a mortgage broker, not a lender, so the lenders that write these lines vary by file.

• A bank statement HELOC changes how income is documented. It does not change how the line is sized.
• Lenders generally size the line on the home as it stands today, not on the finished ADU.
• On this network, an investment property tops out at 70% CLTV (combined loan-to-value, meaning all liens against the property’s value).
• Primary residences and second homes can reach 90% CLTV, but only at a 720-or-better credit profile.
• Projected ADU rent usually does not count toward qualifying for this product.

What Is a Bank Statement HELOC?

A HELOC is a home equity line of credit. The CFPB describes it as an open-end line that lets you borrow repeatedly against your equity during a draw period. It also notes that a lender can stop further advances if the home’s value drops significantly.

“Bank statement” refers only to income documentation. A self-employed borrower with heavy write-offs may show little taxable income. The lender reads deposits from personal or business statements instead. Trade press such as Scotsman Guide describes the usual setup: 12 to 24 months of statements and an expense factor applied to business deposits. Treat that as a market illustration. Each program sets its own factor and statement window.

It is not a no-paperwork loan. The borrower is reviewed on documented income under the applicable program, subject to lender guidelines. Credit, debts, equity, and the property all get reviewed.

Key Terms Defined

CLTV: Combined loan-to-value, the total of all liens divided by the property’s value.

ADU: An accessory dwelling unit, a second small home on the same lot, such as a garage conversion or backyard cottage.

Draw period: The stretch when you can borrow from the line, usually paying interest only.

Expense factor: The share of business deposits the lender assumes goes to costs, so only the rest counts as income.

DSCR: Debt service coverage ratio, monthly rent divided by the full monthly property payment.

Why Can’t One Provider Be Named the Best?

The best program for your situation depends on property type, occupancy, credit, leverage need, and documentation. So Lendmire does not rank or name lenders. Big retail lenders, community banks, and wholesale channels each write different pieces of this market. Many retail lenders want standard income documents. Some smaller institutions offer ADU-specific lines. A broker shops multiple wholesale lenders and matches the scenario to the program.

Lendmire’s wholesale network has a narrower footprint for equity lines than for its DSCR loans. Equity lines are available only in the 16 states where Lendmire offers full-service mortgage lending: AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, and WA. Every figure below is subject to lender guidelines and a full file review.

How Does Underwriting Treat an ADU?

Here is the sequence, step by step.

1. Equity comes first. Available equity is the current value, times the lender’s combined cap, minus the first-lien balance. The CFPB’s HELOC booklet shows the same idea: a percentage of appraised value, less what you owe.

2. The ADU adds nothing yet. The Urban Institute notes that for home equity loans, HELOCs, and cash-out refinances, the appraisal reflects the property without the ADU. Renovation and construction loans can appraise on after-completion value. A standard HELOC does not.

3. Income is read from deposits. The lender removes transfers, loan proceeds, and one-time deposits, then applies its expense factor to business accounts.

4. Debts get checked. On this network, DTI (debt-to-income) maxes out at 50%, or 45% for credit profiles from 600 to 679. Anything above 45% needs a 680 minimum. The lender reviews your file on the interest-only payment calculated on the maximum draw.

5. The property gets reviewed. Expect ID, a current mortgage statement, and proof of insurance. Lines at or below $500,000 ordinarily use an automated valuation. Anything above $500,000 requires a full appraisal, and you may request one in any case.

What Do the Network Programs Look Like?

Lendmire brokers two wholesale programs. The higher-leverage program is the 3-year interest-only draw with a 17-year repayment structure on primary and second-home lines. The longer-runway program is the 5-year draw with a 25-year repayment structure. Where they differ, each figure applies only within its own program.

Lower credit tiers step the ceiling down. A primary residence at 640+ reaches 80% CLTV up to $500,000. A second home at 640+ reaches 75% CLTV. Investment lines start at 700. A line above $500,000 is primary-residence only. It needs a 700 credit profile on the higher-leverage program or 720 on the longer-runway program, and it caps at 75% CLTV.

That describes the broader market and a different product. On an investment-property line in this network, the ceiling is 70% CLTV.

How Do Draws and Repayment Work on a Build?

Lines run interest-only first, then amortize. Primary and second-home lines come in two structures: a 3-year interest-only draw with a 17-year repayment, or a 5-year draw with a 25-year repayment. Tennessee shortens both. Investment lines use the 5-year draw and 25-year repayment only.

At least 75% of the line is drawn at closing. Pricing floats during both the draw and the repayment period and never converts to fixed. After closing, the minimum subsequent draw is $1,000, except Texas at $4,000, under the longer-runway program.

That matters for a build. Interest accrues on the large initial draw before the ADU produces any rent. Budget for that carry, because this network funds most of the line up front rather than in construction phases.

Where Does the General Rule Break?

Rent from the unbuilt ADU. It generally does not count. Lenders size on current value and qualify on documented income. Some smaller lenders offer ADU-specific lines that consider projected rent, but those are different products with different terms.

LLC title. This is the sharpest edge case. These lines require title in the individual borrower’s name or a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. A property already in an LLC needs a vesting change, or a DSCR cash-out refinance instead.

Property type. Single-family, 2-4 units, PUDs, townhomes, and condos (including non-warrantable) are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not offered.

Portfolio size. A borrower is limited to three lines, and anyone with more than 15 financed properties is not eligible.

Texas. A Texas primary residence caps at 80% combined LTV and carries a waiting period and one-lien rule. Second homes and investment properties there are treated as non-homestead.

Falling values. If values drop mid-construction, the lender can freeze or reduce the line, as the CFPB notes.

Which Path Fits: HELOC, DSCR, or Cash-Out?

Many ADU investors treat the HELOC as phase one and a DSCR cash-out refinance as phase two. Draws fund design, permits, and construction. Once the unit is permitted, finished, and leased, a refinance can pay off the line. DSCR qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Cash-out refinances typically need about six months of seasoning and a credit profile around 660 or higher on most programs, with 700+ unlocking the strongest tiers. The complete DSCR loans guide covers that path in detail.

A DSCR loan compares rent to PITIA (principal, interest, taxes, insurance, and association dues) only. Clearing 1.00 does not mean positive cash flow, since repairs, vacancy, and management sit outside the calculation. Select programs start at 1.00. A separate select-lender path goes below 1.00, with leverage and terms adjusted.

Stacking matters here. A second lien raises combined leverage, so the HELOC must be paid off or addressed when you refinance. Leave room for that.

How Do You Choose a Path?

Work through five questions:

1. Title: Is the property in your name or a revocable trust, or in an LLC?

2. Occupancy: Primary, second home, or investment? The ceiling changes with each.

3. Equity: Does value times the CLTV cap, less your first lien, cover the build?

4. Credit: Where do you sit relative to 600, 640, 700, and 720?

5. Exit: Will you refinance into a DSCR loan after the unit is leased?

Before applying, confirm the ADU is permitted and allowed by local zoning. Confirm the property is not listed for sale (a listing in the past 60 days makes the property ineligible in NC, PA, TN, TX, and WA).

How common is this route? The Urban Institute reviewed a California study of more than 800 homeowners who built a permitted ADU. Of the 43 percent who used mortgage products, 56 percent used a HELOC or home equity loan. That is California-only, not a national figure. Tax treatment can depend on how the funds are used and how the property is held; borrowers should keep clear records and speak with a qualified tax professional before relying on any deduction.

If you are considering a home equity line and want to see how the numbers work, Lendmire can help you compare HELOC options based on the property, the equity available, credit profile, combined leverage, and your goals.

About Lendmire

As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and real estate investors in its 16 full-service states open home equity lines of credit arranged through wholesale lenders. Lendmire is never the lender; line amounts, ceilings and terms are set by the lender under its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB

2. Scotsman Guide – Rev Up the Engine for Non-QM Lending

3. CFPB – What You Should Know About Home Equity Lines of Credit

4. Urban Institute – To Increase the Housing Supply, Focus on ADU Financing