How On-Campus MOB Financing Works in San Antonio
San Antonio's healthcare real estate market sits at the intersection of two durable demand drivers: sustained population growth across the San Antonio-New Braunfels metro and a large, consistently active military and veteran population that generates above-average healthcare utilization. These fundamentals have supported strong occupancy across stabilized medical office inventory, particularly for facilities positioned within or immediately adjacent to health system campuses. On-campus medical office buildings benefit directly from the expanding footprints of University Health, Baptist Health System, and Methodist Healthcare, each of which continues to invest in outpatient delivery infrastructure across the metro. For lenders, this is the most creditworthy segment of the medical office sector, and it commands the most competitive financing terms available in the healthcare real estate capital markets.
Within San Antonio, on-campus MOB activity concentrates most heavily around the South Texas Medical Center, which remains the institutional core of the city's healthcare infrastructure, and along the rapidly growing North Side corridors including Stone Oak, Far North Side, and the New Braunfels submarket to the northeast. These growth corridors have attracted significant health system investment in outpatient campuses designed to capture patient volume close to where population density is expanding fastest. Buildings in these locations, anchored by health system-employed physician groups or hospital-affiliated practices under long-term net leases, represent the most financeable assets in the San Antonio MOB market.
The financing thesis for on-campus product in this market rests on two pillars: tenant credit quality and location irreplaceability. A building housing health system-employed physicians under a 15-year NNN lease with a health system guaranty, co-located with diagnostic imaging or a surgery center on a hospital campus, is underwritten very differently than a multi-tenant suburban MOB. Lenders price that distinction aggressively, and sponsors who understand how to structure and present that credit profile consistently access the tightest terms in the sector.
Lender Appetite and Capital Stack for San Antonio On-Campus MOB
For stabilized on-campus assets anchored by an investment-grade or near-investment-grade health system tenant, life insurance companies represent the most competitive permanent capital available in this market. Life companies are selectively active in San Antonio for larger, well-anchored assets, typically pricing in the range of 125 to 175 basis points over the 10-year Treasury for investment-grade credit situations. With the 10-year Treasury around 4.30 percent in 2026, all-in life co pricing on the strongest deals generally falls in the mid-to-high 5 percent range, at loan-to-value ratios of 60 to 70 percent. Amortization is typically 25 to 30 years, with 10-year fixed terms and structured prepayment through yield maintenance or a declining percentage schedule.
CMBS execution is active for on-campus assets at $10 million and above, particularly where the health system anchor carries investment-grade or near-investment-grade credit. CMBS pricing runs wider than life companies, generally 175 to 250 basis points over the 10-year, with leverage available in the 65 to 75 percent range. The trade-off for the additional leverage is a less flexible prepayment structure, most commonly defeasance, which sponsors should factor into their hold period analysis at origination.
Regional and community banks, including Frost Bank and Cullen/Frost affiliates, remain highly active participants in San Antonio MOB financing due to their strong local market relationships and comfort with healthcare borrowers in the metro. Bank execution is most relevant for bridge scenarios, shorter-term fixed or floating needs, and situations where a sponsor is stabilizing a recently delivered on-campus building ahead of a permanent takeout. Bank pricing for these situations generally runs 150 to 250 basis points over SOFR, with SOFR around 3.60 percent in 2026. Debt funds are also available for transitional and value-add scenarios, carrying higher pricing in exchange for speed and flexibility on structure.
Underwriting Criteria That Matter in San Antonio
For on-campus MOB financing in this market, lenders lead with tenant credit and lease structure before they engage with property-level economics in any serious way. The identity of the health system guarantor, the length and structure of the lease, and the mission-critical nature of the tenancy within the broader campus are the primary credit variables. A building housing health system-employed physicians under a 15-year NNN lease with corporate guaranty is underwritten with materially tighter cap rate assumptions and higher debt proceeds than a comparable building with independent physician tenants on shorter terms.
San Antonio-specific underwriting considerations include the market's continued population growth trajectory and the relative depth of the local healthcare delivery infrastructure. Lenders familiar with this market will scrutinize the specific submarket: assets in the South Texas Medical Center and Stone Oak corridors carry stronger lender conviction than assets in less established outpatient locations. Building specifications matter considerably for on-campus product. Medical-grade HVAC systems, reinforced floors for imaging equipment, hospital-level electrical capacity, and full ADA accessibility are baseline expectations. Lenders will review these systems carefully in due diligence, and deferred maintenance on specialized medical infrastructure can create significant friction at loan closing.
Lease rollover concentration is a consistent underwriting focus, particularly for assets where a single health system tenant represents 80 percent or more of the rent roll. Lenders will want to understand lease expiration stacking relative to the loan term and will look for early renewal rights or expansion options that signal the health system's long-term commitment to the location.
Typical Deal Profile and Timeline
A representative on-campus MOB transaction in San Antonio in the current environment involves a stabilized building of 50,000 to 150,000 square feet, fully or substantially occupied by health system-affiliated tenants, located on or directly adjacent to a hospital campus on the North Side or within the South Texas Medical Center. Acquisition deals tend to fall in the $20 million to $80 million range for single-asset transactions, with portfolio and campus-level financings potentially extending to $200 million and above. Sponsors active in this niche are typically institutional developers or private equity-backed owners with demonstrated healthcare real estate operating histories. Lenders have limited patience for first-time medical office sponsors on on-campus assets at institutional scale.
A realistic timeline from signed letter of intent to closing runs 60 to 90 days for life company or CMBS permanent financing on a well-prepared, stabilized asset. The primary variables that extend this timeline are incomplete lease documentation, deferred maintenance discoveries requiring remediation, or environmental conditions requiring further review. Bridge financing through a bank or debt fund can close in 45 to 60 days depending on the lender and deal complexity. Sponsors should retain healthcare real estate legal counsel early, as MOB lease documentation and health system guaranty structures require specialized review that can create delays if not initiated in parallel with the financing process.
Common Execution Pitfalls Specific to San Antonio
The most consistent pitfall in this market is underestimating the documentation requirements around health system lease guaranties. San Antonio's major health systems use sophisticated in-house legal teams, and lease guaranty language is often non-standard. Lenders will require legal review of the guaranty structure before issuing a firm commitment, and incomplete or ambiguous guaranty documentation has derailed more than one financing at the commitment stage.
A second pitfall involves building systems that do not meet lender requirements for medical use. Sponsors acquiring existing on-campus product in submarkets like the South Texas Medical Center should commission a full building systems review early in due diligence. Older medical buildings in this market sometimes carry HVAC and electrical infrastructure that falls short of current lender standards, creating expensive surprises after signing a purchase agreement.
Third, sponsors who approach life company execution without a track record of institutional healthcare real estate ownership consistently face execution risk in this market. Life companies targeting San Antonio on-campus assets are selective, and a sponsor profile that does not match the asset quality will result in a less competitive execution or a declined application, even when the property fundamentals are strong.
Finally, submarket selection is underweighted by sponsors who focus solely on the health system anchor credit. Life company lenders in particular are conducting their own market analysis on San Antonio submarkets, and assets in less-established outpatient corridors will face wider pricing and lower leverage regardless of tenant credit, because the real estate residual value assumptions are weaker outside the core medical corridors.
If you have an on-campus MOB deal in San Antonio under contract or in predevelopment, CLS CRE works directly with life companies, CMBS lenders, banks, and debt funds active in the healthcare real estate sector. Trevor Damyan and the CLS CRE team have structured medical office financing across primary and secondary markets nationally, with direct lender relationships across the full capital stack. Contact CLS CRE through clscre.com to discuss your transaction and review the full On-Campus MOB program guide.