How Much Can You Borrow on an Investment Property HELOC on an Owner-Built Home?

The Quick Read: On Lendmire’s wholesale network, the most you can borrow is the lesser of two numbers: 70% of the property’s appraised value minus every lien already on it, or a hard $500,000 line cap, with owner-built status changing only the value and eligibility, not the percentage.

• The investment-property ceiling is 70% combined loan-to-value (CLTV), and a 700 credit score is the minimum.
• Credit above 700 adds eligibility, not leverage, because 720 and 700 both reach the same 70% ceiling.
• Title must sit with you personally or in a revocable living trust. An LLC cannot hold it.
• Lines at or under $500,000 ordinarily use an automated valuation, which can miss what a custom build offers.
• Barndominiums and log homes are not offered, even when you built them yourself.

Terms vary by lender guidelines, property type, leverage, credit profile, and full file review, and none of the figures here is a commitment to lend.

What Does “Owner-Built” Change About the Limit?

Owner-built status does not create a separate cap. The formula is the same one used for any investment-property line: value times the maximum CLTV, minus the first mortgage and any other liens. What owner-built affects is the value you plug in and whether the property is eligible at all.

Rentalrealestate.com lays out the same arithmetic. Combined loan-to-value is your first mortgage plus the new line, divided by the property’s value. Lenders count the full credit limit in that test, not only the amount you draw.

One real-estate advice source says an owner-built home is not an automatic discount. The finished home is valued against comparable sales, and lenders and buyers tend to look harder at permits and the certificate of occupancy. That matches how the network treats these files: the home is not penalized for who built it, but it has to document well.

How Is the Maximum Line Calculated?

Three limits apply, and the smallest one is your line. They are CLTV room, the program’s dollar cap, and your debt-to-income capacity.

1. CLTV room. Multiply the appraised value by 70%, then subtract what you owe.

2. Dollar cap. An investment line tops out at $500,000, and the minimum line is $25,000 (Michigan’s floor is $10,000).

3. DTI capacity. Debt-to-income runs to 50% at most. It is 45% for credit profiles from 600 to 679, and a ratio above 45% needs a 680 minimum. Because an investment line already floors at 700, that lower-score tier never binds here. Qualification uses the interest-only payment calculated on the maximum draw.

Run two scenarios with a modeled home value of $800,000 (an assumption, not a market fact). With a first mortgage of $400,000, the 70% test leaves room under the network ceiling, and that room, not the dollar cap, sets the line. With no mortgage at all, the 70% test could exceed $500,000, so the dollar cap binds instead. A paid-off property is not unlimited borrowing, because the percentage cap and the dollar cap both still apply.

The calculator on this page can help you test your own numbers as an illustrative estimate. It does not replace a file review.

Why the Appraised Value Is the Swing Factor

For a custom home, value is where owner-built files get tested. Appraisers rely on the sales-comparison approach, and custom homes often have few truly comparable sales, as one appraisal vendor notes. Fewer comps means more adjustments and a wider range of outcomes.

For contrast, Fannie Mae’s appraisal FAQ says an appraiser may use sales that are not truly comparable when the analysis is documented and explained. That is an agency appraisal rule and does not govern this line, but it shows why the appraiser’s narrative matters for an unusual home.

Here is the practical wrinkle. An investment line cannot exceed $500,000, and full appraisals are required only above that size. So an investment HELOC is structurally always in the automated-valuation lane, though a borrower may request a full appraisal in any case. An automated model can miss craftsmanship, outbuildings, acreage improvements, and unusual layouts. If your home has features that a model would not capture, requesting a full appraisal can help the value reflect the real property. A higher CLTV may also trigger a secondary valuation.

Value is also where permits come in. A contractor-compliance source in Los Angeles notes that unpermitted square footage can be excluded from living area, with a cost-to-cure deducted. That is one local example, so treat it as an illustration and not a rule everywhere. Still, the direction is clear: any value lost to missing permits lowers your CLTV room dollar for dollar. Gather your permit history, final inspection, and certificate of occupancy before you apply.

Which Owner-Built Homes Are Eligible?

Eligible property types include single-family homes, 2-4 unit properties, PUDs, townhomes, and condominiums (including non-warrantable ones). Modular factory-built homes are eligible under only one of the network’s two wholesale programs, the longer-runway program. Throughout this article, “the higher-leverage program” means the other wholesale program. An investment line runs a 5-year draw followed by a 25-year fully amortizing repayment, with no shorter option, so the program distinction matters for property type and not for investment draw structure.

Not offered: manufactured homes, co-ops, condotels, log homes, commercial and mixed-use property, and agriculturally zoned land. Barndominiums are also not offered, and that matters here because many owner-built projects are barndominiums. A stick-built home you framed yourself is a very different property from a manufactured home, and the two should not be confused.

A property listed for sale, or listed within the past 60 days, is ineligible in NC, PA, TN, TX, and WA. Owner-built homes still under construction are a separate matter. A HELOC is not construction financing, and owner-builder construction loans are limited to a few lenders, so plan on a finished, occupied-ready home with a certificate of occupancy.

Who Can Hold Title?

Title must be held by you as an individual or in an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. This is the sharpest structural difference from a DSCR loan.

Investors on BiggerPockets report that equity lines on rentals are commonly refused when an LLC holds title. If your owner-built home is already deeded to an LLC, you would need a vesting change or a different product.

Investment Line vs. Primary Residence vs. Second Home

The occupancy of the property you are borrowing against drives the ceiling.

Primary-residence and second-home ceilings reach 90% CLTV only at a 720-or-better credit profile. A primary-residence line above $500,000 caps at 75% CLTV, needs a full appraisal, and requires 700 or better (720 on the longer-runway program). Those numbers do not describe an investment property.

Texas adds a wrinkle: its homestead rules bind primary residences only, while second homes and investment properties are eligible as non-homestead transactions.

Rentalrealestate.com cites typical CLTV of 70% to 80% across lenders, and BiggerPockets members describe lender caps from 60% to 80% LTV. Those are market-wide figures. On Lendmire’s network, the investment ceiling is 70% CLTV.

Key Terms Defined

CLTV (combined loan-to-value): Your first mortgage plus the new line, divided by the property’s value.

Automated valuation: A computer estimate of value that replaces a traditional appraisal.

Draw period: The stretch when you can borrow from the line and pay interest only.

Revocable living trust: A trust you can change or cancel, which can hold title for this product.

Certificate of occupancy: The local sign-off that a finished home is fit to live in.

How the Line Works After Closing

An investment line is a standalone line in first or second lien position. It runs a 5-year draw followed by a 25-year fully amortizing repayment, with no shorter option. At least 75% of the line is drawn at closing, and the pricing floats and never converts to fixed. After closing, the minimum subsequent draw is $1,000, except in Texas at $4,000, as stated by the longer-runway program.

Exposure limits apply too. A borrower is limited to three lines, and an owner of more than 15 financed properties is not eligible. Credit history also matters: a bankruptcy needs 4 years of seasoning, and investment files follow a 7-year path for foreclosure and 4 years for a deed-in-lieu or short sale.

When a DSCR Cash-Out Fits Better

An equity line is reviewed around personal credit, debt-to-income, and equity. Rent never raises the line. So a strong rental coverage ratio does nothing for the HELOC, and a weak one does not hurt it.

Where the HELOC fails, a DSCR cash-out refinance underwrites differently. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Across the network, cash-out refinances top out around 75% LTV on standard rentals, with roughly six months of seasoning commonly expected. That ceiling is higher than the 70% line, but it replaces your existing first mortgage instead of sitting beside it.

DSCR compares rent to the full monthly obligation of principal, interest, taxes, insurance, and any association dues. Clearing 1.00 does not mean positive cash flow, because repairs, vacancy, management, and utilities sit outside the calculation. Select programs start at 1.00, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. For the full picture, see the complete DSCR loans guide.

What to Gather Before You Apply

• Permit history and final inspection sign-off.
• The certificate of occupancy.
• Proof of title in your name or a revocable trust.
• Your first-mortgage balance and any other liens.
• A credit report no more than 90 days old at closing, from a single bureau model keyed to the primary wage earner.
• A decision on whether to request a full appraisal.

Availability is limited to Lendmire’s 16 full-service states: AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, and WA. That is narrower than the 41-market DSCR footprint.

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. Reach the team at 828-256-2183 or request a quote.

About Lendmire

Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Rentalrealestate.com – HELOC on rental property

2. FastExpert – Owner-built home Q&A

3. Class Valuation – new construction appraisals

4. Fannie Mae – Appraisal FAQ

5. LA Construction Compliance – unpermitted work

6. BiggerPockets – HELOC on an investment property

7. BiggerPockets – Need help with HELOC on rental property