Medical Office Building Investments: A Guide for Real Estate Investors

What Is a Medical Office Building (MOB)?

A medical office building is a specialized commercial property designed and equipped for healthcare delivery. These buildings include features that distinguish them from traditional office space: exam rooms, procedure suites, waiting areas with higher patient traffic, specialized HVAC systems for air quality and infection control, HIPAA-compliant soundproofing, and full ADA accessibility.

MOBs also require higher parking ratios (five or more spaces per 1,000 square feet versus three to four for standard office), more complex plumbing and electrical systems, and construction that meets healthcare-specific building codes. Tenant improvement costs run higher as a result.

Common tenants include physician groups, dental practices, imaging centers, physical therapy clinics, urgent care facilities, dialysis centers, and outpatient surgery centers. Buildings range from small stand-alone facilities of 1,000 to 5,000 square feet to large multi-tenant properties exceeding 50,000 square feet.

The asset class is generally segmented into Class A properties (newer, institutional-quality buildings with modern systems), Class B properties (older but functional buildings that may need updates), and stand-alone facilities (single-tenant buildings purpose-built for a specific practice). As of 2025, MOB occupancy reached a cyclical high of 92.7% across the top 100 metropolitan areas, according to PwC and the Urban Land Institute, reflecting sustained demand and limited new supply.

On-Campus vs. Off-Campus Medical Office Buildings

Medical office buildings fall into two broad categories based on their relationship to hospital systems, and the distinction matters for investors evaluating risk and return.

On-campus MOBs sit on or immediately adjacent to hospital campuses. They benefit from hospital referral networks, proximity to emergency departments and inpatient care, and the institutional credit quality of health system tenants. These buildings tend to trade at lower (tighter) cap rates because investors view them as lower risk. Institutional investors and healthcare REITs favor on-campus assets for their stability. On-campus MOBs average roughly 66,900 square feet, about 150% larger than their off-campus counterparts, according to CBRE.

Off-campus MOBs occupy suburban and community locations closer to where patients live. As healthcare delivery continues shifting toward convenient ambulatory care, off-campus demand has accelerated. These buildings generally trade at higher cap rates, offering better yields but with more leasing risk. The category also includes an emerging subset known as “MedTail,” where medical practices occupy space in retail settings to maximize patient convenience and visibility.

Key Benefits of Investing in Medical Office Buildings

Several characteristics make medical office buildings attractive to investors seeking stable, long-term income. Each comes with context worth understanding.

Recession resilience. Healthcare is non-discretionary. During the COVID-19 pandemic, MOB occupancy remained above 91% nationally while traditional office markets experienced significant disruption. During the 2007–2009 financial crisis, MOBs added over 29 million square feet of occupied space while the broader office market lost 111 million square feet, according to Cushman and Wakefield.

Aging demographics. The 65-and-older population is projected to reach 73 million by 2030, up from 58 million in 2022, according to U.S. Census Bureau projections. Older adults visit healthcare providers significantly more often, driving consistent demand for outpatient space.

Favorable cap rate dynamics. MOB cap rates have historically offered a meaningful premium over comparable asset classes. As of late 2025, average MOB cap rates ranged from roughly 6.5% to 7%, according to CBRE and PwC data. That spread reached a record 50-basis-point gap in the second quarter of 2024, when the average traditional office cap rate stood at 7.4%, according to CBRE’s 2025 Healthcare Real Estate Outlook. Cap rates vary by location, campus affiliation, and tenant credit quality. These figures represent general market data and should not be interpreted as projections. Past performance does not guarantee future results.

Strong rent growth. National MOB asking rents rose 6.5% cumulatively from 2020 through mid-2025, far outpacing traditional office rents, which grew less than 1% over the same period.

Long-term leases. Healthcare tenants commonly sign 10- to 15-year leases with annual rent escalations of 2% to 3%, either fixed or tied to CPI. Specialized medical buildouts create high switching costs for tenants, resulting in renewal rates above 85%. This combination of long initial terms and high renewal probability produces more predictable income streams than most commercial property types.

Limited new supply. MOB construction is constrained by zoning requirements, healthcare-specific building codes, and higher construction costs. That supply-demand dynamic may take time to correct, which could support rent growth and occupancy, though market conditions can change based on factors including new construction, regulatory changes, and economic cycles.

Portfolio diversification. MOBs have shown low correlation with traditional office performance, which has struggled significantly with post-pandemic remote work trends. Adding healthcare real estate to a portfolio can reduce overall volatility. Many medical office buildings use NNN (triple net) lease structures where tenants cover property taxes, insurance, and maintenance, which may contribute to more predictable income, though returns are never guaranteed.

Using a 1031 Exchange to Invest in Medical Office Buildings

Medical office buildings qualify as like-kind replacement property under Internal Revenue Code Section 1031. The IRS defines like-kind broadly for real estate: any real property held for productive use in a trade or business or for investment can be exchanged for any other qualifying real property. An investor can sell an apartment building, a retail center, or a traditional office property and exchange the proceeds into a medical office building while deferring capital gains taxes.

The exchange must follow strict timelines. The investor has 45 calendar days from the relinquished property closing to identify potential replacement properties in writing and 180 calendar days to complete the acquisition. There are no extensions. A qualified intermediary must hold the sale proceeds; direct receipt of funds disqualifies the transaction. The replacement property’s value must equal or exceed the relinquished property’s value, and all net equity must be reinvested to achieve full deferral.

MOBs offer several advantages as replacement property: long-term leases provide predictable income, recession-resilient tenants reduce vacancy risk, and NNN structures minimize the management burden. For a full overview of 1031 exchange rules, see the Complete 1031 Exchange Guide. For the step-by-step process, see How to Use a 1031 Exchange.

Investors who want passive exposure to medical office properties without the responsibilities of direct ownership can consider Delaware Statutory Trust structures, which are also eligible as 1031 exchange replacement property. The 1031 DST Exchange Guide covers this approach in detail.

Passive Medical Office Investing Through Delaware Statutory Trusts

A Delaware Statutory Trust (DST) allows multiple investors to hold fractional interests in institutional-quality medical office properties without the burden of active management. A professional sponsor acquires the property, arranges financing, and handles all ongoing operations, including tenant relations, regulatory compliance, and building maintenance.

This structure appeals to MOB investors because healthcare real estate requires specialized management knowledge. Navigating HIPAA compliance, medical buildout coordination, and healthcare tenant relationships adds complexity that a DST sponsor manages on behalf of investors.

DSTs are eligible as replacement property in a 1031 exchange, allowing investors to defer capital gains taxes while gaining exposure to medical office assets. For more on how Delaware Statutory Trusts work, see the DST Learning Hub.

However, DSTs carry meaningful limitations. They are illiquid investments with typical hold periods of 5 to 10 years. They involve sponsor fees and are subject to the specific risks of the underlying property. Investors cannot direct management decisions or force a sale.

Understanding Medical Office Building Lease Structures

The lease structure in a medical office building directly affects an investor’s income predictability, expense exposure, and long-term returns. Understanding how MOB leases work is essential to underwriting these investments.

NNN (triple net) leases are the dominant structure in medical office real estate. The tenant pays base rent plus a pro-rata share of property taxes, insurance, and common area maintenance (CAM) expenses. This transfers most operating cost variability to the tenant, leaving the investor with a more predictable net income stream. NNN leases are especially common in single-tenant and credit-tenant deals.

Modified gross leases are more typical in multi-tenant MOBs, where the landlord covers certain operating expenses and passes others through via CAM charges. The allocation varies by lease.

Lease terms in MOBs typically run 10 to 15 years, with annual rent escalations of 2% to 3% (either fixed increases or CPI-linked adjustments). These longer terms reflect the substantial tenant improvement (TI) investments required for medical buildouts. Plumbing for exam rooms, upgraded electrical systems, specialized HVAC, and in some cases lead-lined walls for imaging equipment all represent significant upfront costs. Once a medical tenant has invested in a specialized buildout, the cost of relocating is high, which supports strong renewal rates and tenant stability.

Medical office rents generally command a premium over traditional office space, reflecting the specialized infrastructure and higher construction standards involved. For a detailed breakdown of how triple net leases work and what landlords are responsible for, see the Triple Net Lease Guide.

Risks of Investing in Medical Office Buildings

No asset class is without risk, and medical office buildings carry specific challenges that investors should evaluate carefully.

Tenant concentration risk. Single-tenant MOBs face significant vacancy exposure if the tenant relocates or closes. A specialized buildout designed for one medical practice may not easily accommodate a different specialty, potentially leading to extended vacancy and costly renovations. Multi-tenant buildings provide some insulation against this risk.

Specialized buildout costs. Converting a medical office between specialties or to non-medical use can be expensive. A radiology suite with lead-lined walls and heavy electrical infrastructure cannot easily become a dental office or a general office suite without substantial renovation. Investors should assess re-tenanting costs as part of their underwriting.

Regulatory and compliance burden. Healthcare facilities must comply with HIPAA privacy requirements, ADA accessibility standards, fire safety codes, and local building regulations. These requirements can increase operating costs and limit the flexibility to repurpose space.

Telemedicine considerations. MOBs have proven resilient to telehealth so far, but continued expansion of virtual care could reduce demand for certain in-person visit types over time. Most procedures, imaging, lab work, and physical examinations still require a physical facility.

Property obsolescence. Older MOBs with low ceilings, outdated HVAC, or poor accessibility can become functionally obsolete. Investors should evaluate building condition, age, and modernization costs carefully.

Due diligence complexity. Evaluating MOBs requires understanding tenant creditworthiness, medical practice economics, referral patterns, and reimbursement trends. This is a more specialized knowledge base than most commercial property types demand.

Medical Office Building Due Diligence: What to Evaluate

Before committing capital to a medical office building, investors should work through a structured evaluation. The following checklist covers the primary areas of analysis.

• Location. Is the property on-campus or off-campus? What is its proximity to hospitals and major health systems? What do local demographic trends look like, including population growth, median age, and healthcare utilization patterns?
• Tenant profile. Is the anchor tenant a physician group, a health system, or a single practitioner? What is the tenant’s credit quality and operating history in the local market? Are there barriers to entry for the tenant’s medical specialty that reduce competitive risk?
• Lease terms. Is the lease NNN, modified gross, or full-service? What is the remaining lease term, and what renewal options exist? What is the rent escalation structure (fixed percentage, CPI-linked, or flat)?
• Building condition. What is the age of the property, and what is the condition of major systems (HVAC, plumbing, electrical, roof)? Does the building meet current ADA requirements? Is the parking ratio adequate (five or more spaces per 1,000 square feet)? Are ceiling heights and floor loads sufficient for modern medical equipment?
• Market fundamentals. What is the local demand for healthcare real estate? How much competing MOB supply exists or is under construction? What are the insurance reimbursement trends in the region?
• Financial analysis. How does the property’s cap rate compare to similar assets? Is the net operating income stable and well-supported? What tenant improvement obligations remain? Is there deferred maintenance that will require near-term capital expenditure?
• Adaptability. Can the space be re-leased to different medical specialties without major renovation? Could it convert to non-medical use if necessary?
• Regulatory compliance. Does the building currently meet all applicable building codes, fire safety requirements, and healthcare facility regulations?

Is Investing in Medical Office Buildings Right for Your Portfolio?

Medical office buildings offer a compelling combination of recession resilience, demographic tailwinds, long-term lease stability, and attractive cap rates relative to other commercial property types. The asset class benefits from structural demand that is unlikely to diminish as the U.S. population ages and healthcare spending continues to grow.

Those strengths come with trade-offs. Medical office investing requires more specialized knowledge than many other property types, carries higher due diligence complexity, and exposes investors to tenant concentration and buildout obsolescence risks. These are manageable challenges, but they require careful evaluation.

Investors considering medical office buildings should consult qualified real estate and tax professionals to determine whether MOBs align with their investment objectives, risk tolerance, and portfolio strategy. For a broader comparison of investment property types, see the Asset Classes Hub.