The quick read: Office building loan terms split by lender type in 2026: urban office conduit CMBS loans carried a 15.6% median debt yield in Trepp's 2026 sample, SBA 504 financing works only for an owner-occupied building, not an investment purchase, and banks, life companies and debt funds have to be asked for their terms directly. Submit your office deal for lender quotes to see which of these structures actually fits your building's occupancy and tenancy today.
As of: September 21–23, 2026 (latest published FRED readings) Bank prime loan rate: 7.00% (FRED DPRIME, September 21, 2026) SOFR: 3.87% (FRED SOFR, September 23, 2026) 10-year Treasury: 4.96% (FRED DGS10, September 22, 2026) Policy backdrop: FOMC raised the federal funds target range by 1/4 percentage point on September 16, 2026 What this page is: a lender-type comparison of office loan structures, not one published office rate
What loan terms can you get on an office building by lender type in 2026?
Loan terms on an office building in 2026 depend far more on which lender type you approach than on any single published office rate, because banks, life companies, CMBS conduits, debt funds and the SBA each price leverage, recourse and amortization differently. The table below shows each lender type's published terms, or what to ask where none is published.
Table: Office building loan terms by lender type, as of September 2026
| Lender type | Leverage today | Rate basis | Recourse | Amortization |
|---|---|---|---|---|
| Bank or credit union | Not published for office; ask whether it sizes to the building's in-place or projected cash flow | Ask whether the rate is fixed or floats over prime (7.00%, FRED DPRIME, Sept. 21, 2026) or SOFR (3.87%, FRED SOFR, Sept. 23, 2026), and at what spread | Ask whether it is full, partial or non-recourse | Set per loan; confirm in the term sheet |
| Life insurance company | Not published for office; ask what leverage, occupancy and tenant credit it requires | Ask whether the rate is fixed and what benchmark it is spread over | Ask whether it is non-recourse and which carve-outs apply | Ask the amortization period; commercial mortgages generally do not fully amortize over the stated term and frequently end with a balloon payment (Wikipedia) |
| CMBS conduit | Urban office conduit loans carried a 15.6% median origination debt yield on 2026 originations through Aug. 4, 2026, versus 9.5% for urban single-asset (SASB) office loans in the same window (Trepp data, via CRE Daily, Sept. 8, 2026) | Ask whether the rate is fixed; fixed-rate loans on stabilized property are generally priced as a spread to swaps, matched to the loan term (Wikipedia) | Ask whether it is non-recourse, meaning secured by the property only, with no further claim against the borrower after foreclosure (Wikipedia) | Commercial mortgages frequently amortize over the term, and some start with an interest-only period (Wikipedia); ask which applies |
| Debt fund or bridge lender | Not published for office; ask how it sizes and prices vacant or transitional space | Ask whether the rate floats over SOFR (3.87%, FRED SOFR, Sept. 23, 2026) and at what spread | Ask whether it requires recourse or a completion or lease-up guaranty | Ask whether it is interest-only, and for how long |
| SBA 504 (owner-occupied only) | Structured as a private lender first mortgage of up to 50% of project cost, plus a CDC second mortgage of up to 40%, against a borrower equity contribution of at least 10% (SBA) | Fixed rate; the CDC portion is pegged to an increment over the 10-year Treasury (SBA) | Ask whether owners must personally guarantee it; the program excludes financing for speculation or investment in rental real estate, so it applies only where the business itself occupies the building, not where it is leased out (SBA) | 25 years is the stated maturity for real estate on the CDC/504 structure; 10-, 20- and 25-year terms are available depending on the asset financed (SBA) |
No public source publishes a single maximum LTV or minimum DSCR by lender type for office specifically, so this table does not invent one. What is published, and dated, is the CMBS debt-yield split above and the structural terms of the SBA 504 program; the rest of the table lists general loan mechanics and what to ask each lender type, not a number any index reports.
The closest published anchor for leverage and coverage across all commercial property types, not office alone, comes from CBRE's Q2 2026 Lending Momentum Index report: average commercial loan-to-value was 59.6%, down from 60.8% a year earlier, and the average debt service coverage ratio was 1.43x, up from 1.34x, with commercial mortgage spreads narrowing 21 basis points year-over-year to 204 bps and the average interest rate near 5.7 percent, as of CBRE's report published August 3, 2026. The report does not break out office, so treat 59.6% LTV and 1.43x DSCR as an all-property reference point, not an office quote, and ask each lender what it will offer on your building.
What moves the numbers on an office loan?
Four forces move an office loan's rate, leverage and recourse more than anything else: the building's occupancy and lease rollover schedule, the credit quality of its tenants, how distressed the CMBS maturity pipeline looks that quarter, and which lender type still wants the deal at all. Each one pushes terms in a specific, identifiable direction.
Office CMBS delinquency hit a record 12.34% in January 2026, and most new office delinquencies were maturity defaults — buildings that still generated income but whose borrowers could not refinance at higher rates — according to Trepp data reported by CRE Daily on February 20, 2026. Ask each lender how that backdrop affects its quote, whether or not the specific building being financed has ever missed a payment.
Lender appetite has not vanished. Commercial and multifamily loan originations for office properties rose 47% year-over-year in the second quarter of 2026, according to the Mortgage Bankers Association's release published August 6, 2026 — evidence that capital is returning to the asset class. Ask each lender which traits it is lending against today, such as renovated space, a staggered lease-expiration schedule and tenant credit, and how your building compares.
The debt yield a lender sets — net operating income divided by the loan amount — caps proceeds independent of the appraised value, and it is the number doing the most work in the CMBS conduit row above. A building can appraise at a value that supports a larger loan and still be capped by debt yield if in-place income has not caught up to it.
What terms apply to a stabilized, multi-tenant office building?
A stabilized multi-tenant office building, with steady occupancy, staggered lease expirations and a rent roll spread across several tenants, can be shown to every lender type in the table above except SBA 504, which excludes investment in rental real estate. Ask a bank, a life company and a CMBS conduit to quote it side by side.
The diversification is the point: no single tenant's renewal decision determines whether the building keeps paying debt service. Lenders read a staggered rollover schedule as a form of built-in refinancing insurance, because even a soft leasing market rarely hits every suite at once. For the broader financing landscape this profile competes in, including which platforms actively fund it, see YieldStack's overview of office financing options.
The trade-off is pace: a multi-tenant building usually needs a full rent roll, current leases and trailing operating statements before any lender will quote it, because the underwriting is a sum of many smaller credits rather than one. For a building mid-lease-up, with several units still vacant, ask each lender type whether it will quote before occupancy stabilizes.
What terms apply to a single-tenant, credit-leased office building?
A single-tenant office building financed on a long-term lease to an investment-grade or otherwise creditworthy tenant underwrites more like a bond than like real estate, because the tenant's credit and the lease's remaining term carry the loan. Ask each lender type, life companies and CMBS conduits included, what amortization and recourse it will offer against that lease.
The variable that matters most here is the weighted average lease term remaining at closing, not the building's physical condition. A ten-year lease with eight years remaining supports a longer, more aggressive loan than the same building with three years left, because the lender is really underwriting the tenant's credit and its incentive to renew, not the real estate alone. A single-tenant building with a below-investment-grade or unrated tenant reverts to being priced like a multi-tenant building, sometimes worse, because there is no diversification to fall back on if that one tenant leaves.
Rollover risk is the other side of the same coin: as the remaining lease term shortens, proceeds shrink and recourse requirements tend to increase, well before the lease actually expires. A sponsor refinancing a single-tenant building three years from lease expiration should expect materially different terms than the same building refinanced the day after a ten-year renewal is signed.
What terms apply to an owner-occupied medical or professional office building?
An owner-occupied medical or professional office building, where the operating business occupies the building rather than leasing it out, is the one office subtype where SBA 504 financing applies. The program combines a private lender's first mortgage of up to 50% of project cost with a CDC second mortgage of up to 40%, against at least 10% borrower equity.
The eligibility line is strict, not a guideline. The SBA's own program page states that 504 funds may finance "the purchase, construction or renovation of existing buildings or land," but explicitly excludes "speculation or investment in rental real estate" — meaning a physician group buying its own clinic qualifies, while the same group buying a multi-tenant medical office building purely to lease to other practices does not. For medical and professional office financing that falls outside owner-occupancy, the lender-type table above, not the SBA row, is the one that applies.
The CDC second mortgage carries a fixed rate pegged to an increment over the 10-year Treasury, with a 25-year maturity stated for real estate; the first mortgage is underwritten and priced separately by the private lender. The combined effect is a high-leverage, long-fixed-rate structure for a business that genuinely occupies its own building; ask whether a bank, life company or CMBS lender can match it, and whether owners must personally guarantee it. It is not available for a building bought purely to lease out.
How do you get lenders competing for this office loan?
You get lenders competing for an office loan by putting one complete file (current rent roll, trailing financials, tenant lease abstracts and a leasing plan for any vacancy) in front of several lender types at once, so each one prices the same building against the same numbers on the same day. A single-lender process only tells you one lender's answer.
That is the work YieldStack does. YieldStack is a commercial mortgage brokerage, not a lender. A borrower completes a 5-minute submit, the deal is presented to lenders whose programs fit it from a catalog of 20,000+ loan programs, and the median offer in under an hour, from an institutional lender, is the starting point for negotiation, not the end of it. It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed.
What moves an office quote most is the story behind any vacancy. A leasing plan with named prospects, a funded tenant-improvement budget and a sponsor with completed lease-up experience each give a lender less to price in as risk. Compare how different lender types might read your building's specific occupancy and tenancy profile in the lender-match tool before you shop it to any one of them.
The bottom line
Office building loan terms in September 2026 are set lender type by lender type, not by one published office rate: urban office conduit CMBS loans carried a 15.6% median debt yield on 2026 originations through August 4, per Trepp data reported by CRE Daily, SBA 504 financing is available only to a business that occupies the building itself, not an investor leasing it out, and banks, life companies and debt funds have to be asked for their terms directly. Prime sat at 7.00% on September 21, 2026, SOFR at 3.87% on September 23 and the 10-year Treasury at 4.96% on September 22, following the Federal Reserve's September 16 rate increase. Terms move as occupancy, tenant credit and the CMBS maturity pipeline shift, so compare more than one lender type before treating any single quote as the market.