How a Bank Statement HELOC Works to Build an ADU on a Texas Homestead

The Quick Read: A bank statement HELOC lets a self-employed Texas homeowner qualify on documented deposit income and borrow against homestead equity to build an ADU, but income is only the first test, and Texas homestead rules still cap the line at 80% combined loan-to-value. The deposits decide whether you can carry the debt. The homestead rules decide how much the house can hold. You need to clear both.

• Two separate tests. Deposit income measures your ability to repay. Combined leverage on the home’s value today measures how big the line can be.
• The Texas cap. A Texas primary residence tops out at 80% combined loan-to-value in this network. Lower credit tiers step down from there, subject to lender guidelines.
• Draw mechanics. At least 75% of the line is drawn at closing, and later draws on a Texas line start at $4,000.
• Income. Qualification runs on documented income under the applicable program, with debt-to-income capped at 50%.
• Availability. Whether a given lender offers a deposit-based option on a Texas homestead line is a lender-by-lender question.

A self-employed contractor, a restaurant owner, or a freelancer often shows modest taxable income after write-offs. Yet the same person may deposit a healthy amount every month. That gap is why this product exists. The ADU adds a second wrinkle: you are borrowing against a home you live in, in a state that protects that home harder than almost anywhere else.

Key Terms Defined

Bank statement HELOC: A home equity line of credit where the lender estimates your income from business or personal bank deposits instead of tax-return income.

Homestead: The home you live in as your primary residence, which Texas shields from most liens and lets lenders lien only in narrow ways.

ADU (accessory dwelling unit): A second, smaller living unit on the same lot, such as a backyard cottage or a garage conversion.

Combined loan-to-value (CLTV): Every loan secured by the home, added together, divided by the home’s value.

Draw period: The stretch when you can borrow from the line and pay interest only, before the balance begins to amortize.

Expense factor: The share of business deposits an underwriter subtracts for costs before counting the rest as your income.

What a Bank Statement HELOC Actually Is

A bank statement HELOC is an ordinary equity line with a different way of proving income. The collateral, the leverage limits, and the credit requirements do not change. Only the income calculation does.

The product is a standalone line, in first or second lien position. Across the wholesale network Lendmire works with, two draw structures exist for primary residences. One runs a 3-year interest-only draw followed by a 17-year repayment. The second is a 5-year interest-only draw followed by a 25-year fully amortizing repayment. Pricing floats during both phases and never converts to fixed.

For an ADU, the 5-year structure tends to fit better. Permitting, construction, and lease-up can easily eat three years, and a longer interest-only runway gives you room. Line sizes run from $25,000 to $750,000. Lines above $500,000 are limited to primary residences, need a 700 credit profile or better (720 on the 5-year draw structure), cap at 75% combined loan-to-value, and require a full appraisal.

One caveat belongs here. Not every wholesale lender offers a deposit-based income option on a Texas homestead line. Some do and some do not. A broker earns its keep by checking which lenders write the scenario before you spend money on plans and permits.

How Underwriting Treats Your Deposits, Step by Step

Underwriting turns deposits into a monthly income figure, then tests that figure against your debts. The typical trade-press description of the process involves a self-employed borrower with no W-2 handing over 12 to 24 months of personal or business bank statements, and the lender then applying a standard expense factor to arrive at qualifying income. That same source gives 50% as an example factor. Treat it as an illustration, because the factor varies by program and by business type.

Here is how the sequence usually runs:

1. Collect the statements. Lenders generally ask for a run of consecutive months from the account where your business or personal income lands.

2. Strip out the noise. Transfers between your own accounts, loan proceeds, refunds, and one-time deposits do not count as income.

3. Apply the expense factor. If the factor is 50%, only half of the cleaned-up deposits count. A business with high costs may be asked to use a higher factor.

4. Average the result. The lender divides by the number of months to get monthly qualifying income.

5. Test the debt load. In this network, debt-to-income tops out at 50%. It is 45% for credit profiles from 600 to 679, and a ratio above 45% requires a 680 minimum.

6. Size the payment at the maximum. The lender reviews your file on the interest-only payment calculated on the maximum draw, not on what you plan to borrow.

That last step surprises people. A line sized at the maximum is tested as if you had drawn the whole thing, even if your ADU budget needs less.

Bank statements do not mean light scrutiny. The same trade source notes that non-QM lenders still confirm the borrower can repay, with more flexibility in how they do it. Credit still matters, too. The program floor is a 600 score, the report can be no more than 90 days old at closing, and a single-bureau score model keys to the primary wage earner. Whatever the income method, the file is reviewed on documented income under the applicable program, subject to lender guidelines.

The Texas Homestead Limits That Size the Line

The Texas Constitution, in Article XVI, Section 50, writes the home equity rules directly into the state’s founding document. The Texas A&M Real Estate Research Center explains that covered loans fall into three groups: cash-out refinances, home equity loans, and HELOCs. It also confirms that these loans apply only to the homestead and cannot be taken on a second residence or a rental.

Three rules shape an ADU plan.

The 80% ceiling. The state’s mandatory consumer notice from the Texas Office of Consumer Credit Commissioner describes the limit this way: your home equity loan plus all other liens cannot exceed 80% of the home’s market value on the closing date. In this network, a Texas primary residence caps at 80% combined loan-to-value, and the higher tiers you may see for other states never apply. For credit tiers, think of it as a ladder. A 640 score and above reaches the Texas cap on lines up to $500,000. Around 700, a line up to $750,000 sits at 75%. At 620 the ceiling is 70%, and at 600 it is 60%, with those two lower tiers limited to $400,000. All of it is subject to lender guidelines and full file review.

Value is measured at closing. The test uses what the house is worth on the closing date. It is reasonable to infer that the ADU’s future value does not count toward the line, because the building does not exist. Confirm with the lender how its valuation handles planned improvements. Lines at or below $500,000 ordinarily run an automated valuation instead of a traditional appraisal, though a higher combined leverage may require a second valuation. You can request a full appraisal in any case.

A waiting period. The same Texas A&M source says the lender must give you a separate written notice at least 12 days before closing. That clock runs on the legal calendar, and a builder has to schedule around it. The network also applies a 12-month seasoning requirement and the one-lien-at-a-time rule to Texas primary residences. Closing must happen at the lender’s office, a title company, or an attorney’s office.

How the Draws Work When You Are Paying a Builder

A Texas line gives you real structure for paying contractors, and it also has a catch. After closing, each advance must be at least $4,000, and the Texas Bankers Association says you cannot get advances with a credit card, debit card, or solicitation check.

The minimum draw suits construction invoices well. Foundation, framing, rough-in, and finish work each produce bills far above that floor. Writing a check or wiring funds for each milestone is how the line is meant to be used.

Now the catch. At least 75% of the line is drawn at closing in this network. That means you start paying interest on most of the money before the foundation is poured. A homeowner who sizes the line at the maximum and builds slowly carries interest on idle cash. The sensible move is to size the line to the realistic project budget, with a modest cushion, rather than the biggest number the equity allows. Idle proceeds can sit in a savings account until the invoices arrive.

A Worked Example in Percentages

Run the numbers on a hypothetical homeowner, using percentages of home value only. These are modeled assumptions, not market data.

Say the home’s value at closing is 100%. The existing first mortgage is 50% of that value. The Texas ceiling is 80%, so the most the new line can add is 30% of value. At least 75% of that is drawn at closing, which is roughly 22.5% of the home’s value in cash on day one. The rest comes out later in draws of $4,000 or more.

Scenario one. The ADU budget is 25% of home value. It fits inside the 30% of room, and a line sized a little above the project cost covers contractor payments and a cushion. The borrower still needs credit at or above the tier that reaches the 80% cap, and the debt-to-income test has to pass on the maximum-draw payment.

Scenario two. The ADU budget is 40% of home value. The line tops out 10 points short. The options are a smaller design, cash from savings for the gap, phasing the build, or a different financing path entirely. Stretching the plan to the legal limit and hoping the contractor finishes under budget is the one option that rarely ends well.

Now the deposit side. If an underwriter applies a 50% expense factor, only half of the cleaned-up deposits count. A borrower whose deposits look strong may find qualifying income lands at about half of that, and the 50% debt-to-income ceiling is applied to that smaller number. Strong deposits and a large equity cushion do not guarantee a fit. Either test can be the one that limits the line.

Where the General Rule Breaks

The mechanics above hold for a typical primary-residence file. These edge cases bend or break them.

You already have a Texas equity or cash-out loan. A homestead that already carries a cash-out lien has to resolve it before a new line can be placed. Sequencing matters: if an ADU is in your plans, take the equity line for it before any cash-out refinance on the same home.

Texas has a separate improvement-lien path. The state also authorizes a lien specifically for new construction or renovation on a homestead. It carries its own requirements, including spouse signatures on a family homestead, a contract executed before material is furnished or labor performed, a waiting period after you apply, and a closing venue rule. Counsel and the title company confirm the details for your file. Lenders and borrowers sometimes use this path when a standalone equity line is blocked by an existing lien.

An older cap is gone. The Texas Bankers Association says an older cap on certain home equity loans applied only to older loans and has since been removed. If a guide mentions it, the guide is out of date.

The homestead status ends. When you move out and the house becomes a rental, it leaves the homestead category. Equity lines of this type cannot be taken on a rental in Texas. That is one more reason to place the line while you still live there. A property already held as a non-homestead follows a different set of terms. On an investment property, the ceiling is 70% combined loan-to-value, the minimum credit score is 700, and the line maxes out at $500,000, always with the 5-year draw structure.

Title and vesting. Title must sit with you as an individual or in a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title on this product, per lender program requirements. If the property sits in an LLC today, a vesting change or a different loan type is the fix.

Property type and size. Single-family homes, 2-4 unit properties, PUDs, townhomes, and condominiums are eligible, including non-warrantable condos. Manufactured homes, log homes, and agricultural or mixed-use zoning are not offered. Texas properties are limited to 10 acres, and a property listed for sale or listed within the past 60 days is ineligible.

Renting the finished ADU. Whether rental income from the unit affects your homestead property-tax exemption is a question for your county appraisal district, and tax treatment varies, so consult a qualified professional. Local rules on whether an ADU is allowed at all come from your city and any deed restrictions, so confirm permission before you apply. A completed ADU may support a higher appraised value, depending on comps and underwriter review, but no one should plan on a fixed lift.

Does This Fit You?

This product fits a homeowner who is self-employed, has real equity in the home they live in, wants to build one unit, and has a project budget that sits comfortably inside the 80% ceiling. It also fits someone who wants interest-only payments while the project is built and rented.

It fits less well when the budget needs more than the home’s current equity can supply. It also fits poorly when an existing lien blocks a second one, or when the owner plans to move out soon. A construction-focused path may suit those cases better.

The ADU also changes what comes next. DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. If the home eventually becomes a rental, a DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. DSCR compares rent to the full monthly payment of principal, interest, taxes, insurance, and any dues. Clearing 1.00 is where many select programs start, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. A passing number is not the same as positive cash flow, because repairs, vacancy, and management sit outside the calculation. A DSCR loan can often be written to an LLC, subject to lender program eligibility. Lendmire arranges DSCR investor loans across 41 markets, including Washington, D.C., and the complete DSCR loans guide covers the mechanics in full.

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. Lendmire is a mortgage broker, not a lender. It places these lines through select wholesale partners in the 16 states where it offers them, Texas among them, and every file is subject to lender guidelines and full review.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage broker. Home equity lines of credit — on a primary residence, a second home or an investment property — are arranged through wholesale lenders in Lendmire’s 16 full-service states, and every line is underwritten by the lender under its program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

Investors who want the broader program framework can review how DSCR loans work.

References

1. Scotsman Guide, Rev Up the Engine for Non-QM Lending

2. Texas A&M Real Estate Research Center, What to Know About Home Equity Loans in Texas

3. Texas Bankers Association, Home Equity Lines of Credit