Life sciences real estate and medical office buildings (MOBs) are frequently grouped together as healthcare real estate, but they are operationally and economically distinct asset classes that trade at very different cap rates. Life sciences encompasses wet laboratories (requiring specialized plumbing, HVAC, and chemical exhaust infrastructure), dry labs and computational research space, and GMP (Good Manufacturing Practice) manufacturing facilities subject to FDA or Health Canada regulatory oversight.
Medical office buildings, by contrast, are clinical care delivery facilities (physician practices, imaging centres, ambulatory surgery centres, and specialist clinics) where the principal product is patient visits rather than research outputs. The infrastructure requirements, tenant profiles, lease economics, and valuation methodologies differ substantially across these two segments.
Life sciences lease economics are dominated by tenant improvement costs that are among the highest in the commercial real estate sector. Converting a generic office building to wet lab standard requires $150 to $300 per square foot in tenant improvements, covering HVAC modifications (dedicated exhaust for fume hoods, 100% outside air systems), reinforced floor loads (300-500 lbs per SF for equipment), upgraded electrical capacity, and specialised plumbing, per CBRE's North America Life Sciences 2024 Outlook.
Established tenants with Phase 2 or Phase 3 drug candidates and institutional backing can absorb these TI packages through base rent amortisation, but pre-revenue biotech tenants present covenant risk that landlords mitigate through letters of credit (typically 6-12 months of base rent), personal guarantees from institutional sponsors, and staged TI disbursements tied to regulatory milestones. The result is that life sciences landlords are underwriting both real estate risk and the operating risk of the tenant's research pipeline.
MOB cap rate compression is driven by four structural forces that distinguish the asset class from conventional office. Clinical stickiness is the most powerful: a physician practice that has invested in a tenant buildout, established patient referral patterns, and built a loyal patient base within a specific building will almost never voluntarily relocate; CBRE Healthcare Real Estate data indicates MOB tenant retention rates consistently exceed 85%.
Government-backed billing streams (Medicare in the United States, provincial health insurance plans in Canada) provide revenue predictability that private-market tenants cannot match. Long triple-net leases with annual rent escalators provide income stability prized by institutional investors, particularly pension funds and healthcare REITs.
Structural vacancy rates have historically been 3-5% for on-campus MOBs affiliated with major hospital systems, versus 10-15% for conventional suburban office. Cap rates for on-campus MOBs affiliated with investment-grade health systems have ranged from 4.75% to 5.75%, per JLL's Healthcare Real Estate 2024 Investor Survey.
Geography concentration risk is the most underappreciated credit risk in life sciences investing. The life sciences cluster dynamic means that research-stage tenants make location decisions based on proximity to anchor research institutions, established biotech ecosystems, and deep labour pools of PhD scientists and clinical trial managers, not on relative rent economics.
The three dominant US clusters (Greater Boston/Cambridge, San Francisco Bay Area, and San Diego) and the emerging cluster of Toronto/Waterloo in Canada collectively account for the majority of North American life sciences absorption. This concentration means that cluster-specific shocks (a major anchor tenant's pipeline failure, a regulatory hold on a dominant therapeutic category, or the departure of a key research institution) can trigger simultaneous vacancy across multiple buildings within the same submarket.
MOBs affiliated with hospital systems carry a different geographic risk: a health system's decision to consolidate clinical operations or build a new medical campus can shift demand away from older affiliated MOBs in ways that cap rate analysis alone cannot capture.