How Off-Campus MOB Financing Works in San Antonio
San Antonio's suburban medical office market is being shaped by two converging forces: sustained population growth across the San Antonio-New Braunfels metro and the aggressive outpatient expansion strategies of major regional health systems including University Health, Baptist Health System, and Methodist Healthcare. As these systems extend their ambulatory footprints beyond hospital campuses, they are pulling specialist groups, multi-specialty clinics, and ancillary service providers into suburban corridors that were, until recently, primarily retail and light commercial in character. The result is a robust off-campus MOB inventory concentrated along the North Side, Stone Oak, Far North Side, and rapidly developing New Braunfels and Boerne submarkets, where demographic growth is outpacing existing healthcare supply.
Off-campus medical office buildings in San Antonio differ from their on-campus counterparts in one structurally important way: they carry a more diverse and independent tenant roster. Orthopedic and cardiology groups, urgent care operators, dental service organizations, physical therapy networks, and outpatient diagnostic providers are the core tenants. These users are not tethered to a single health system, which gives the buildings operational flexibility but introduces higher rollover risk relative to hospital-affiliated MOBs. Lenders financing off-campus suburban assets in San Antonio are therefore underwriting tenant credit and remaining lease term much more carefully than they would on a health-system-anchored campus deal. Occupancy in stabilized suburban corridors is holding in the low-to-mid 90 percent range, which gives lenders a reasonable comfort floor, but individual asset performance varies meaningfully by submarket and tenant composition.
Financing for these assets in San Antonio is broadly available at competitive terms for stabilized, well-leased properties. The market's military and veteran population adds a layer of structural healthcare demand that is relatively recession-resistant, which lenders factor into their long-term outlook on occupancy durability. Assets serving the South Texas Medical Center submarket and the North Central corridor benefit from proximity to institutional anchors, while deals in New Braunfels and Boerne are being evaluated increasingly on their own suburban growth fundamentals rather than proximity to a major campus.
Lender Appetite and Capital Stack for San Antonio Off-Campus MOB
Community and regional banks are the dominant execution vehicle for stabilized off-campus MOB in San Antonio, and Frost Bank along with other Cullen/Frost affiliates represents the clearest example of a relationship-oriented lender that understands this product type deeply at the local level. These institutions are underwriting to 65 to 75 percent LTV on stabilized assets, pricing at spreads of roughly 200 to 325 basis points over the 10-year Treasury or on a floating basis tied to SOFR. With the 10-year Treasury around 4.3 percent and SOFR near 3.6 percent heading into 2026, all-in rates on bank paper are landing broadly in the 6 to 7.5 percent range depending on sponsor relationship, lease structure, and asset quality. Amortization is typically 20 to 25 years with a 5 or 7 year term, and prepayment is most commonly structured as step-down or declining percentage rather than defeasance, which is a practical advantage for sponsors who anticipate refinancing within the hold period.
CMBS becomes relevant for off-campus San Antonio MOBs at roughly $10 million and above, provided the asset carries strong occupancy and includes at least one credit-tenant anchor. CMBS executes at 70 to 75 percent LTV with spreads of approximately 225 to 325 basis points over, but the fixed-rate structure comes with yield-maintenance or defeasance, which needs to be modeled carefully against projected hold periods. Life insurance companies are selectively present for larger assets, particularly those with a health-system anchor component, but are generally not the primary execution vehicle for pure off-campus suburban MOB without an institutional tenant of significance.
For owner-occupant physician groups acquiring their own building, SBA 504 remains the most capital-efficient structure available, enabling up to 90 percent combined LTV through the bank and CDC tranches. This is particularly relevant for smaller orthopedic, dental, or specialty group practices acquiring buildings in the $5 million to $10 million range. Bridge debt from regional debt funds is active for value-add and lease-up scenarios, covering repositioning of older suburban medical office into multi-specialty use, with interest reserves and structured earn-outs tied to leasing milestones.
Underwriting Criteria That Matter in San Antonio
Lenders financing off-campus MOB in San Antonio are placing the greatest emphasis on three factors: weighted average lease term remaining, tenant credit quality at the individual practice level, and the physical condition of the medical build-out. Because off-campus tenants frequently lease on personal guaranty from physician owners rather than through large institutional balance sheets, underwriters are looking closely at the practice's revenue profile, the length of time in the market, and whether a personal guaranty has meaningful financial depth behind it. A five-year lease with three years remaining from a solo practitioner is underwritten very differently from the same structure backed by a regional dental service organization or a multi-site orthopedic group.
Building specifications matter in direct ways to loan sizing. Medical-grade HVAC, higher electrical capacity, clinical plumbing, and ADA compliance are minimum standards. Assets with imaging rooms or procedure suites carry replacement cost premiums that affect both appraisal and insurable value, and lenders want to see these components reflected accurately in the valuation. In submarkets like Stone Oak and Far North Side where development activity has been elevated, appraisers are marking cap rates with careful attention to new supply, and lenders are applying their own stress assumptions on re-tenanting cost if a physician group vacates at lease expiration.
Typical Deal Profile and Timeline
A representative off-campus MOB financing in San Antonio today is a multi-tenant suburban building totaling 15,000 to 40,000 square feet, total capitalization in the $8 million to $25 million range, and a tenant roster of three to six physician practices or service providers with staggered lease expirations. The sponsor is typically an experienced local or regional owner-operator with an existing relationship at the lending institution, though out-of-market sponsors with a documented medical office track record are received reasonably well given the market's fundamentals.
Realistic timeline from signed purchase and sale agreement through closing runs 60 to 90 days for a community bank execution on a stabilized asset, assuming clean title, an appraisal that supports contract price, and no significant lease issues surfaced during due diligence. CMBS timelines run 75 to 100 days. SBA 504 transactions require more lead time, often 90 to 120 days, given the CDC approval process. Bridge transactions through debt funds can close in 45 to 60 days when the sponsor provides complete documentation early.
Common Execution Pitfalls Specific to San Antonio
The most consistent pitfall in San Antonio off-campus MOB transactions is overestimating appraised value on assets where lease term is thin. A building with good occupancy but multiple leases rolling within 24 months will receive significant lender scrutiny, and appraisers are applying vacancy and re-tenanting assumptions that compress value materially compared to a stabilized hold. Sponsors who price acquisitions on in-place rent without modeling renewal risk at current market terms will find themselves short of proceeds at closing.
A second common issue involves medical build-out cost documentation. Lenders and appraisers both require a clear accounting of tenant improvement costs, particularly for imaging and procedure spaces, and incomplete records of what was installed at whose cost can slow or complicate underwriting. Sponsors acquiring assets with significant clinical build-out should obtain full documentation from the seller during diligence rather than reconstructing it after the appraisal is ordered.
Third, sponsors underestimate how lender-specific relationships are in this market. San Antonio's community bank lenders are genuinely relationship-driven, and a borrower approaching Frost Bank or a similar institution cold without a prior relationship will face longer onboarding timelines and more conservative initial structuring than an existing client. Working through an experienced broker intermediary accelerates the introduction and positions the deal within the lender's existing framework for the asset class.
Finally, suburban submarkets like New Braunfels and Boerne, while experiencing strong demographic growth, are still being evaluated by lenders as secondary locations relative to established San Antonio corridors. Sponsors acquiring or developing in these submarkets should expect more conservative LTV assumptions and greater emphasis on lease term and tenant quality to offset the perceived market depth risk.
If you have a San Antonio off-campus medical office acquisition under contract, a refinance in process, or a development approaching capitalization, contact CLS CRE to discuss execution. Trevor Damyan and the CLS CRE team work with the full spectrum of capital sources active in medical office nationally, and have structured transactions across community bank, CMBS, life company, SBA, and bridge debt fund executions. Review our full medical office program guide or reach out directly to begin a lender-matching conversation.