Medical Office Building Construction: The Healthcare Sector Between Physicians' Offices and Full Hospitals

Medical Office Buildings (MOBs) serve healthcare providers with infrastructure between physician's offices and full hospitals. MOB tenants include primary care, specialty practices, urgent care, imaging centers, labs, surgery centers, and other ambulatory care. Construction complexity varies — primary care relatively simple; imaging and surgery substantially complex. FGI Guidelines (Facility Guidelines Institute) establish design and construction standards for healthcare including ambulatory care. State health departments typically incorporate FGI Guidelines.

MOB construction combines commercial office characteristics with healthcare-specific requirements. Understanding MOB specifics helps contractors pursue this growing healthcare sector. This post covers MOB construction.

MOB Tenant Types

MOBs host diverse tenants:

Tenants vary substantially in construction requirements. Primary care relatively simple. Specialty practices vary by specialty — orthopedic has minimal special needs; oncology has specific requirements. Urgent care between primary and hospital ED. Imaging has substantial structural and mechanical needs. Labs have specific ventilation. Surgery centers essentially outpatient hospital.

FGI Guidelines

FGI provides standards:

FGI Guidelines establish design/construction standards for healthcare. Separate documents for hospitals and outpatient facilities. Ambulatory care provisions apply to MOBs. Adopted by most state health departments as regulatory requirement. Specifies clearances, sizes, infection control, HVAC, and other requirements. Updated periodically.

Exam Rooms

Exam rooms are standard MOB scope:

Exam rooms form core of MOB space. FGI specifies minimum sizes (typically 80 sf minimum). Hand sink required per FGI ratios. Examination lighting (specific types). Medical gas for specialty practices. Data/phone for each. Privacy details. Door hardware supporting privacy. Patient lift considerations for bariatric.

Procedure Areas

Procedure areas more complex:

Procedure rooms more complex than exam rooms. Sterilization support. HVAC with specific air changes and filtration. Medical gas (vacuum, air, O2, sometimes N2O). Power conditioning for sensitive equipment. Emergency power for equipment/lighting. Flooring selection for cleanability. Specific finishes supporting cleaning.

Imaging Construction

Imaging has specific requirements:

Imaging substantially more complex. MRI is especially demanding — heavy equipment, RF shielding, cryogen vent, specific cooling. CT and X-ray require lead shielding but simpler than MRI. Structural for vibration isolation. Equipment delivery requires planning (MRI may need wall removal). Specialty flooring.

HVAC Requirements

Healthcare HVAC specific:

HVAC per ASHRAE 170 (Healthcare Facilities Standard) or FGI-referenced. Specific air changes per space type. MERV 13+ filtration typical. Pressure relationships — clean areas positive to soiled, others per use. Temperature and humidity control. Humidification in some spaces. Often separate from adjacent commercial tenants.

Life Safety

Life safety specific:

Life safety per code. Business occupancy (B) for most MOBs. Higher-acuity services (surgery centers) may be I-2 (ambulatory health care occupancy) with more stringent requirements. Sprinklers throughout. Fire alarm with appropriate detection. Emergency lighting. Egress per classification. Smoke compartments for I-2.

Infection Control

Infection control integrated:

Infection control shapes MOB design. Cleanable surfaces (epoxy floors, vinyl base, solid-surface or laminate counters). Coved bases. Limited horizontal surfaces. Hand hygiene stations. Appropriate HVAC. Isolation capability in some. During construction in occupied buildings, Infection Control Risk Assessment (ICRA) required.

Finishes

Finishes per healthcare:

MOB finishes balance healthcare requirements with patient comfort. Sheet vinyl or LVT flooring cleanable. Coved bases often welded. Wall systems cleanable. Wallcovering or paint rated for healthcare. Cleanable ceiling tiles. Durable doors. Solid surface counters. Patient-centered design considers comfort beyond just cleanability.

Multi-Tenant Considerations

Multi-tenant MOBs have specifics:

Multi-tenant MOBs often built as core and shell with tenant fit-out separate. Healthcare-specific building systems (chilled water, hot water, medical gas risers sometimes). Tenant improvement allowances. Shared common areas with appropriate finishes. Directory and signage. Common area specifications must support healthcare use.

Bottom Line

Medical Office Building construction combines commercial office characteristics with healthcare-specific requirements. FGI Guidelines establish standards adopted by state health departments. Tenant mix drives complexity — primary care simpler, imaging and ambulatory surgery complex. Exam rooms and procedure areas are core scope. Imaging adds structural, shielding, and mechanical complexity. HVAC per ASHRAE 170 with specific air changes, filtration, and pressure relationships. Life safety per occupancy. Infection control shapes design and construction. Finishes support healthcare use. Multi-tenant MOBs have core/shell considerations. Contractors pursuing MOB work need healthcare construction expertise beyond commercial office. Growing ambulatory care sector drives substantial MOB construction. Understanding MOB specifics positions contractors in this healthcare sector.