Every developer planning a medical office building or ambulatory campus has the same conversation. The pro forma is tight. Adding retail and ancillary revenue could close the gap. A pharmacy. A café. A lab. A small imaging center. Maybe a wellness or rehab tenant. The numbers on a spreadsheet always look attractive — incremental revenue against marginal incremental cost — but the actual performance of retail and ancillary tenants in ambulatory facilities is wildly inconsistent. Some pencil beautifully and produce sustained revenue. Others underperform from the first month and become long-term vacancies or below-market rent.
This article walks through which retail and ancillary services actually generate sustainable revenue in MOBs and ambulatory facilities, what the sizing and integration decisions look like, and where developers most often misjudge the opportunity.
What Drives Retail and Ancillary Demand in Medical Buildings
Retail and ancillary tenants in medical buildings serve two demand streams. The first is patients and visitors moving through the building for clinical visits. The second is the broader trade area — neighborhood residents, employees from surrounding buildings, and walk-in customers. The mix between these two streams defines what kinds of tenants will succeed.
Buildings with high patient volume — large MOBs, hospital campuses, multi-specialty centers — generate enough internal traffic to support some retail purely from the patient stream. Smaller buildings generally need to draw from the broader trade area to make retail tenants viable. The most successful medical building retail typically serves both streams: a pharmacy that captures patient prescriptions and serves the neighborhood, a café that serves patients, visitors, and employees, a lab that draws from multiple referring practices and walk-ins.
The Urban Land Institute publishes research on medical office and mixed-use development trends that documents how retail and ancillary integration affects MOB performance and tenant demand.
What Actually Pencils: Pharmacy
Retail pharmacy is the most reliable ancillary tenant in medical buildings, and it pencils when the patient stream and trade area can support it. Patients leaving an appointment with a prescription represent immediate, captive demand. Pharmacy operators value this proximity and will pay competitive rents in buildings with strong patient flow.
The sizing matters. A typical retail pharmacy footprint runs three thousand to five thousand square feet, with parking, drive-through (where allowed by zoning), and visibility from the main building entrance or street frontage. Buildings without those characteristics often cannot support a full retail pharmacy — but may support a smaller pharmacy specialty or compounding tenant.
Specialty pharmacy operators serving oncology, infusion, or other complex medication categories are also active in medical buildings, particularly campuses with related clinical services. These tenants typically require less square footage but higher infrastructure investment in clean room space, refrigeration, and security. The demand comes from referring practices in the building rather than retail traffic.
What Actually Pencils: Café and Food Service
Café and food service in medical buildings is more variable than pharmacy. Buildings with high daily population — hospital campuses, large multi-tenant MOBs — often support full-service cafés or limited-menu food operations that pencil. Smaller buildings often cannot generate enough daily transaction volume, and the café becomes a building amenity subsidized by lower rent rather than a profit center.
The sizing decision is critical. A café designed for the building’s actual realistic transaction count tends to perform; a café designed for an aspirational transaction count tends to fail. Operators value buildings where they can run efficient operations with predictable daily volume, and they will pay market rent in those situations. They will not pay market rent for spaces that require staffing for traffic that does not arrive.
Vending and grab-and-go alternatives have expanded substantially. Smart vending, automated micro-markets, and unstaffed grab-and-go concepts let buildings provide food access without supporting full café operations. These alternatives often produce better economics in mid-sized buildings than a full café would.
What Actually Pencils: Lab and Imaging
Lab draw stations are a strong ancillary fit in MOBs. National lab operators value proximity to referring practices and will pay competitive rents for well-located draw stations. The footprint is small — often under one thousand square feet — and the infrastructure requirements are modest. Buildings with multiple referring specialties typically support a draw station easily.
Imaging is more complex. Ambulatory imaging centers are real estate plays in their own right, and they may be a strategic anchor in some medical buildings rather than an ancillary tenant. Smaller imaging — basic X-ray and ultrasound — sometimes integrates as ancillary in larger buildings, but MRI, CT, and advanced imaging usually need their own building or dedicated suite with major infrastructure investment that does not fit the ancillary economics.
The Centers for Medicare and Medicaid Services publishes fee schedules and reimbursement data that drive the underlying economics of lab and imaging tenants. Tenants will sign leases against rates that produce sustainable economics; rates that do not produce viable margins will not support market rent.
What Pencils Less Often: Wellness, Retail, and Specialty Concepts
Wellness tenants — fitness, physical therapy, massage, integrative medicine — pencil in some buildings and not in others. Physical therapy as a clinical tenant typically pencils where a referring orthopedic or sports medicine practice is in the building. Stand-alone wellness or fitness concepts are more variable; they need broader trade-area draw and often cannot pay medical-office rent levels.
True retail concepts — apparel, gifts, consumer goods — rarely pencil in medical buildings unless the building has hospital-campus traffic or is part of a mixed-use development with non-medical demand. Building owners proposing retail concepts in standard MOBs are usually optimistic about patient discretionary spending in ways that the data does not support.
Specialty concepts — hearing aid centers, optical, dental — can pencil where the demographic and clinical mix support them. These typically need to integrate with referring practices in the building and sometimes serve as anchor tenants in their specialty rather than as pure ancillary.
Operational Integration and Tenant Mix Strategy
The retail and ancillary tenants that pencil best are the ones that integrate operationally with the clinical tenants in the building. A pharmacy across the lobby from a high-volume primary care or specialty practice generates higher script capture than a pharmacy in a building where the clinical tenants do not naturally direct patients. A lab draw station in a building with three referring practices outperforms a draw station serving one practice. A café next to a busy infusion suite has different demand than a café in a quiet specialty building.
Tenant mix decisions should account for these dynamics. Building owners who plan the clinical and ancillary mix together — placing high-script-volume specialties near the pharmacy, locating physical therapy near orthopedic and sports medicine practices, sequencing food service near the highest-population floors — produce buildings where each tenant supports the others. Building owners who place ancillary tenants in available space without operational logic often produce mediocre performance even with strong individual operators.
Lease structures can also support integration. Some MOB owners structure ancillary leases with percentage rent provisions that scale with patient or transaction volume, aligning the building’s incentive with the tenant’s success. Others provide tenant improvement allowances calibrated to ancillary economics rather than medical-office norms, recognizing that some ancillary uses cannot support full medical-office rents but generate value through traffic and amenity that supports the clinical tenants.
How to Size and Integrate Retail and Ancillary Correctly
Sizing decisions should be driven by realistic demand modeling, not by available square footage. A building with eight thousand square feet of ground-floor retail space can underperform if six thousand square feet of that is sized to a tenant that cannot realistically generate enough revenue to pay market rent. The discipline is to size each ancillary use to what the demand will actually support, leave the remaining space flexible for future tenants, and accept that some ancillary square footage may be better deployed as additional medical use.
Integration decisions matter too. Pharmacy and lab tenants benefit from positioning near the main lobby, the elevator, or the high-traffic clinical floors. Cafés and food service benefit from natural light, lobby visibility, and indoor or outdoor seating where the site supports it. Hidden retail does not perform regardless of the operator’s quality.
Disciplined retail and ancillary planning does the demand modeling, sizing, and integration work upfront, before the building is designed around assumed retail that may not materialize. Strong program definition and clinical planning frames how retail and clinical use share the building so neither compromises the other. And experienced medical real estate services judgment helps developers calibrate the ancillary mix to the building’s market and the underlying pro forma.
Plan Ancillary Around Real Demand, Not Wishful Pro Formas
Ancillary revenue is real when the demand is real. The buildings that perform on retail and ancillary income are the ones that sized each use to what the building and the trade area can actually support. Talk to Medical Construction Group about how to plan retail and ancillary integration that strengthens your MOB or ambulatory campus pro forma instead of weakening it.
Frequently Asked Questions
- What percentage of an MOB should typically be allocated to retail and ancillary use?
There is no universal answer, but five to fifteen percent of total building square footage is a typical range for buildings that intentionally include ancillary use. Larger campuses and hospital-adjacent buildings can support higher percentages; smaller, suburban MOBs often support less. - Can ancillary tenants pay medical-office rent levels?
Some can, some cannot. Pharmacy and lab tenants typically pay competitive medical-office rents in well-located buildings. Café, wellness, and retail tenants generally pay below medical-office rates and may require concessions in early years to establish operations. - Should ancillary tenants be locked in before construction starts?
Where possible, yes. Anchor ancillary tenants with strong credit and clear operational plans should be signed before final design so the space can be designed correctly for their use. Speculative ancillary square footage should be designed flexibly to accommodate future tenants whose specific requirements are unknown.