Senior Debt Structures:
Agency, CMBS, Debt Fund & Bank Loans Compared

Senior debt is the foundation of every commercial real estate capital stack. It is the first-lien mortgage that occupies the most protected position in the deal structure — first to be repaid, lowest risk for the lender, and the largest single source of capital in virtually every acquisition or development transaction. For North Fulton County operators, understanding the four primary types of senior debt — agency, CMBS, private debt funds, and bank balance sheet lending — and knowing which fits a given deal type, size, and timeline is a core underwriting competency that directly affects project economics.

The choice of senior debt lender is not purely a rate decision. Prepayment flexibility, recourse requirements, speed of execution, leverage availability, and the lender's willingness to accommodate deal-specific features all affect the total economics of a deal. A CMBS loan that prices 50 basis points tighter than a bank loan may be the wrong choice if the deal requires prepayment flexibility for a refinance in year three. A debt fund loan at SOFR plus 400 basis points may be the right choice if the asset is transitional and needs a 24-month bridge period that agency lenders cannot underwrite. For context on how senior debt fits into the full capital stack, see our guide to the capital stack explained.

The Four Types of Senior Debt in Commercial Real Estate

Senior debt in commercial real estate comes in four primary forms, each with a distinct risk profile, underwriting standard, execution timeline, and cost of capital. Understanding these differences at a technical level allows operators to select the right lender for each deal rather than defaulting to the most familiar relationship — a costly mistake that can leave leverage or flexibility on the table.

Agency lending (Fannie Mae and Freddie Mac) is the gold standard for stabilized multifamily assets. Agency programs offer the highest leverage (up to 80% LTV), the longest fixed-rate terms (5-, 7-, and 10-year fixed), and the most competitive interest rates — typically 50–150 basis points below comparable bank or CMBS pricing. The trade-off is strict underwriting requirements: minimum occupancy thresholds (typically 90%+ physical, 85%+ economic), seasoned borrower requirements, environmental compliance, and detailed unit-level due diligence. Agency loans are not available for transitional or value-add assets that are not yet stabilized.

CMBS lending offers fixed-rate, non-recourse financing for a broader range of commercial property types — including retail, office, industrial, and mixed-use in addition to multifamily. CMBS conduit loans are originated by banks and investment banks, then securitized into commercial mortgage-backed securities pools sold to bond investors. Because the loan is sold into a trust after origination, CMBS loans are rigid: interest-only periods are limited, prepayment requires expensive defeasance or yield maintenance, and loan modifications are extremely difficult post-securitization.

Private debt funds fill the gap between bank/agency lending and hard money — providing bridge, transitional, and construction financing for assets and borrowers that don't qualify for conventional lending. Debt funds are faster (30–45 day closing typical), more flexible on asset condition and occupancy, and willing to underwrite lease-up risk that banks reject. The cost is significantly higher: SOFR plus 300–500 basis points floating, often with 1–2 points of origination fees and 12–36 month loan terms with extension options.

Bank balance sheet lending represents the traditional relationship banking model — the bank underwrites, funds, and holds the loan on its own balance sheet rather than selling it. This creates flexibility: banks can modify loan terms, extend maturity, and work constructively with borrowers through temporary distress because they own the loan and bear the credit risk. The trade-off is that bank loans typically require some level of recourse, are limited to loan sizes that fit the bank's concentration limits, and are underwritten to conservative standards that may cap leverage below what other lender types offer.

Agency Lending: Fannie Mae and Freddie Mac for Multifamily

For stabilized multifamily assets in North Fulton County, agency lending through Fannie Mae's DUS (Delegated Underwriting and Servicing) program or Freddie Mac's Optigo network is typically the first capital source operators should evaluate. Agency loans deliver the lowest cost of capital available to multifamily borrowers — critical for optimizing NOI to debt service ratios and maximizing cap rate compression benefit.

Fannie Mae's Multifamily program offers fixed-rate terms from 5 to 30 years, with interest-only periods available on qualifying loans. LTV caps are 80% for standard deals, 75% for cash-out refinances, and 65% for higher-risk assets. The minimum DSCR requirement is 1.25x for most programs, tested on actual in-place income rather than market projections. Freddie Mac's Optigo program offers similar terms with slight structural differences — both agencies have recently expanded their programs for workforce housing and green-certified buildings in suburban Atlanta markets.

The key limitation of agency lending is the stabilization requirement. Fannie and Freddie will not lend on properties with occupancy below 85-90%, significant deferred maintenance, or active renovation programs. For value-add acquisitions — one of the most common deal types in North Fulton County's multifamily market — operators typically use a bridge loan from a debt fund for the 18–24 month value-add period, then refinance into agency permanent financing once the property is stabilized. This "bridge-to-perm" strategy is the standard execution path for multifamily value-add deals in institutional markets. See our guide to bridge loan vs. mezzanine for a comparison of transitional financing options.

Agency loan prepayment structures are important to understand before committing. Standard Fannie and Freddie loans include step-down prepayment penalties — typically 1% declining over the loan term — or yield maintenance provisions that can be costly on fixed-rate loans in a declining rate environment. Operators who anticipate an early exit or refinance should negotiate prepayment flexibility at origination, or consider a floating-rate agency product that offers greater prepayment optionality.

CMBS, Debt Funds, and Bank Balance Sheet: Key Differences

CMBS conduit lending is the institutional workhorse for non-multifamily commercial assets — retail centers, office buildings, industrial portfolios, and mixed-use developments that don't qualify for agency programs. CMBS loans are originated by bank and investment bank conduit teams, then pooled and securitized into trusts (Real Estate Mortgage Investment Conduits — REMICs) whose bonds are sold to institutional investors. Because the loan is transferred to a trust at origination, all subsequent decisions — modifications, maturity extensions, forbearances — require approval from the CMBS trust's special servicer, a process that is slow, expensive, and unpredictable.

For North Fulton operators using CMBS, this inflexibility is the critical risk factor. If a North Fulton retail asset faces a major tenant departure mid-loan term, the CMBS special servicer's interests (as the credit-risk bearer for the trust's subordinate bonds) may diverge significantly from the operator's optimal resolution strategy. CMBS loans are appropriate for stabilized, long-term-hold assets where prepayment is not anticipated — ground-floor retail in a major mixed-use development, for example, where the operator plans to hold through the 10-year CMBS term without sale or refinance.

Private debt funds represent the fastest-growing segment of the senior lending market. In 2026, debt funds control an estimated $300B+ in real estate lending capacity — filling gaps left by bank regulatory constraints and providing capital to transitional assets and operators that conventional lenders cannot serve. Debt fund loans for North Fulton value-add acquisitions typically structure as: 12–24 month initial term with 1–2 six-month extension options; floating rate at SOFR plus 350–450 basis points; interest-only during the initial term; minimum 65–75% LTV with leverage up to 80% on strong deals; and non-recourse with standard fraud/environmental carve-outs. See our bridge loan vs. mezzanine guide for how debt fund bridge loans compare to mezzanine financing in the capital stack.

Bank balance sheet lending remains the most relationship-driven senior debt option. North Fulton community banks and regional banks — including those serving the Alpharetta, Milton, and Johns Creek markets — offer balance sheet loans with the flexibility to accommodate deal-specific features that CMBS and agency programs cannot. Banks can structure interest reserves into construction loans, accept earnout provisions tied to lease-up milestones, and work with operators through temporary operating challenges in ways that securitized lenders cannot. The cost of this flexibility is recourse — banks typically require personal guarantees from the GP and sometimes the LP as well, and may include cross-collateralization provisions that link the subject property to other assets in the borrower's portfolio. See our guide to recourse vs. non-recourse financing for a full analysis of the personal liability implications.

Matching Senior Debt to Your North Fulton Deal Type

The optimal senior debt structure for a North Fulton deal depends on four primary factors: asset type, stabilization status, hold period, and exit strategy. Operators who systematically evaluate these factors before approaching lenders close faster, achieve better terms, and avoid the costly process of reformatting a deal after a lender mismatch is discovered mid-application.

For stabilized multifamily acquisitions in Milton, Alpharetta, or Johns Creek — properties with 90%+ occupancy, in-place rents at or near market, and minimal near-term capital expenditure requirements — the decision framework is: start with agency (Fannie/Freddie) for maximum leverage and lowest rate; if the deal is too small for agency minimum loan sizes (typically $1M–$3M minimum), move to bank balance sheet; if the operator has recourse concerns or needs non-recourse financing, evaluate CMBS for sub-agency deals. Agency financing for stabilized North Fulton multifamily typically delivers 75–80% LTV at 6.25–7.25% fixed with 30-year amortization and 5- or 7-year fixed terms.

For value-add multifamily acquisitions — properties with below-market occupancy, deferred renovation programs, or below-market rents that require a 12–36 month repositioning period — the standard execution path is debt fund bridge loan for the transition period, followed by agency permanent financing at stabilization. Debt fund bridge loans for North Fulton value-add multifamily typically provide 70–80% of as-is value (sometimes 65% of stabilized value on a future-funded basis) at SOFR plus 350–450 basis points, with an 18–24 month initial term. The operator's business plan must show a clear path to agency-qualifying stabilization metrics within the bridge term.

For ground-up development in North Fulton County — a category that includes new multifamily, mixed-use, and commercial development — bank balance sheet construction loans remain the dominant financing vehicle, supplemented by construction loan programs from institutional debt funds and specialized construction lenders. Construction loans are typically structured at 60–65% of completed value (LTV on a stabilized "as-complete" basis), with interest-only draws during construction and a 12–24 month stabilization period before conversion to permanent financing. For a detailed comparison of construction financing options, see our guide to construction vs. bridge loans. For operators managing high-leverage capital stacks, see our high-leverage debt ratio guide.

Frequently Asked Questions

What is senior debt in real estate? ▾

Senior debt is the first-lien mortgage on a real estate asset — the most senior position in the capital stack. It is repaid first from all property cash flows and sale proceeds, carries the lowest risk for the lender, and therefore commands the lowest interest rate available for any given deal. In the event of default, the senior lender has first right to foreclose and take ownership of the collateral property, making it the most protected lender position.

What LTV do agency loans allow for multifamily? ▾

Fannie Mae and Freddie Mac agency loans for stabilized multifamily properties typically allow up to 80% LTV for standard market-rate acquisitions, with 75% LTV being the most common underwriting threshold for standard deals. Cash-out refinances are typically capped at 75% LTV. Affordable housing, workforce housing, and green-certified properties may qualify for higher LTV under specific agency programs. LTV is calculated on the lower of appraised value or purchase price.

How do CMBS loans differ from bank loans? ▾

CMBS loans are securitized into commercial mortgage-backed securities and sold to bond investors — making them inherently inflexible post-origination. They are non-recourse, offer competitive rates, but have rigid prepayment penalties (defeasance or yield maintenance) and no relationship component for modifications. Bank balance sheet loans are held by the originating lender, offering relationship flexibility and modification potential, but typically require recourse guarantees and conservative leverage limits.

What interest rates do private debt funds charge in 2026? ▾

Private debt funds in 2026 typically price floating-rate senior bridge loans at SOFR plus 300–500 basis points, resulting in all-in rates of approximately 8.5–10.5% depending on deal risk, leverage level, and borrower quality. Bridge loans on higher-risk transitional assets carry spreads toward the top of this range. Debt funds also typically charge 1–2 origination points and may include exit fees. Their speed and flexibility justify the premium over agency and bank pricing for transitional North Fulton deals.

What DSCR do lenders require for North Fulton commercial loans? ▾

Most lenders require a minimum 1.20x Debt Service Coverage Ratio for North Fulton commercial loans, calculated as NOI divided by annual debt service. Bank balance sheet lenders typically require 1.25x–1.30x as a minimum. Agency lenders underwrite to a minimum 1.25x DSCR tested on in-place income. Private debt funds may accept 1.15x on transitional assets during active lease-up, with a covenant to reach stabilized DSCR within a defined timeframe — typically 18–24 months.