When a university, hospital system, or research institute plans a new laboratory building — or renovates existing floor space — one of the first and most consequential decisions is how much of that space should be built as wet lab versus dry lab. The two space types have fundamentally different mechanical, electrical, and plumbing (MEP) requirements, different construction costs, and different safety infrastructure, so getting the split wrong is expensive to fix after the fact. This guide covers what distinguishes wet lab space from dry lab space, the infrastructure and cost implications of each, and a practical checklist for planning a new or renovated research facility.
What Is a Wet Lab?
A wet lab is a laboratory space designed and built to handle chemicals, biological samples, drugs, or other liquids and materials that require plumbing, specialized ventilation, and chemical- or biohazard-resistant surfaces. Wet labs are the standard setting for bench-based experimental science: chemistry, biology, microbiology, pharmacology, and most life-sciences and biotech research. Core wet-lab infrastructure typically includes:
- Fume hoods and, where biological hazards are present, biosafety cabinets, both requiring dedicated exhaust ductwork
- Plumbed sinks, deionized/reverse-osmosis water, and in some cases specialty gas lines (compressed gas, vacuum, nitrogen)
- High-air-change-rate HVAC, frequently 100% single-pass (once-through) outside air rather than recirculated air, to safely exhaust fumes and prevent cross-contamination
- Chemical-resistant casework, countertops (epoxy resin or similar), and flooring with appropriate drainage
- Emergency eyewash stations and safety showers, positioned per code within a defined travel distance of hazard sources
- Floor loading and vibration tolerances suited to benchtop equipment such as centrifuges, autoclaves, and analytical balances
What Is a Dry Lab?
A dry lab is a laboratory or research space where the work is computational, analytical, instrumentation-based, or otherwise does not involve open handling of chemicals or biological liquids. Dry labs support disciplines such as bioinformatics, computational biology, data science, physics and engineering theory, electronics and device prototyping, and imaging or instrumentation suites where the sample itself was already processed elsewhere. Typical dry-lab infrastructure looks very different from a wet lab’s:
- High-density electrical and network/data infrastructure to support workstations, servers, and instrumentation
- Standard recirculating HVAC (no requirement for 100% outside air or chemical fume exhaust)
- Vibration isolation and, for some equipment (electron microscopes, certain imaging or metrology instruments), electromagnetic-interference shielding — dry labs housing sensitive instrumentation can actually have tighter environmental tolerances than a typical wet lab, just of a different kind
- Antistatic flooring and surfaces in electronics-heavy dry labs
- Flexible, mobile casework and adjustable shelving rather than fixed chemical-resistant benches
- No requirement for eyewash/safety-shower stations, fume hoods, or specialty gas plumbing
Note that “dry lab” does not mean “no equipment” — a dry lab can be equipment-intensive (server racks, imaging instruments, 3D printers, robotics benches). The defining line is the absence of open chemical or biological hazard handling, not the absence of hardware.
Key Differences at a Glance
| Dimension | Wet Lab | Dry Lab |
|---|---|---|
| Typical disciplines | Chemistry, biology, microbiology, pharma, most life sciences | Computational science, engineering/physics theory, bioinformatics, data science, device prototyping |
| Plumbing/gas | Sinks, DI/RO water, specialty gases, drainage | None or minimal |
| Ventilation | High air-change rate, often 100% outside air, fume hood exhaust | Standard recirculating HVAC |
| Surfaces | Chemical-resistant casework/flooring | Standard or antistatic surfaces |
| Safety infrastructure | Eyewash stations, safety showers, spill containment | Standard building fire/life-safety only |
| Electrical/data load | Moderate | High-density power and networking |
| Relative construction cost | Significantly higher (MEP-intensive) | Substantially lower |
| Renovation flexibility | Costly to reconfigure (fixed MEP) | Comparatively easy to reconfigure |
Why Wet Lab Space Costs So Much More to Build
Commercial real estate and life-sciences construction data consistently show that laboratory build-out costs run far above standard office or dry-lab fit-out, driven overwhelmingly by mechanical, electrical, and plumbing (MEP) systems. Industry cost surveys have reported overall life-sciences fit-out costs averaging in the range of several hundred dollars per square foot in major markets in 2025, with ground-up laboratory construction in leading life-sciences hubs (Boston/Cambridge, San Diego, the San Francisco Bay Area) reported at roughly $675-$1,200 per square foot — figures that should be treated as directional industry benchmarks rather than a fixed number for any specific project, since they move with market, building type, and finish level. Dry lab space, by contrast, is reliably and substantially cheaper to build precisely because it skips the fume-exhaust ductwork, once-through air handling, plumbing, and chemical-resistant finishes that drive wet-lab MEP cost. When planning a facility budget, treat the wet-lab share of the program, not total square footage alone, as the primary cost driver.
Hybrid and Flex Lab Space
Because converting dry space to wet space after the fact means retrofitting exhaust ductwork, plumbing, and structural provisions that are far cheaper to build in from the start, many newer life-sciences buildings are designed with “flex” or “vanilla shell” lab space: floor plates pre-provisioned with the structural capacity, shaft space, and utility stub-outs needed to convert dry-configured space to wet lab use later, without a full building renovation. This lets an institution lease or build to a lower initial cost and phase in wet-lab-grade infrastructure as research needs grow, rather than over-building wet lab capacity that sits underused. When evaluating a facility for long-term use, ask specifically what fraction of the shell’s dry space is “wet-capable” (i.e., has the shaft, floor-to-floor height, and structural loading already provisioned) versus space that would require a ground-up MEP retrofit to ever support wet-lab work.
Converting Between Wet and Dry Lab Space
Converting dry lab space to wet lab use typically requires, at minimum: new exhaust ductwork routed to a rooftop or exterior discharge point, upgraded air-handling capacity (wet labs need substantially more air changes per hour than office-grade dry space), new plumbing runs, chemical-resistant casework and flooring, and code-required safety fixtures (eyewash/shower) within a defined distance of any hazard. Floor-to-floor height and existing shaft space are frequently the binding constraint — a floor plate designed for dry-lab or office use often does not have the vertical duct riser space a wet lab conversion needs, which is why “wet-capable” shell design (see above) matters so much for long-term flexibility. Converting wet lab space back to dry use is comparatively simple: the fixed MEP infrastructure can usually be left in place (deactivated rather than removed) and standard office/dry-lab finishes installed over it, though the institution is then carrying unused wet-lab MEP capacity and cost.
A Practical Space-Planning Checklist
- Inventory actual research activity, not job titles. A single principal investigator’s group can run both wet-bench work and heavy computation — plan by activity type, not by lab/department name.
- Right-size the wet lab share. Over-provisioning wet lab space locks in the highest-cost MEP infrastructure for space that may sit idle; under-provisioning forces expensive retrofits later. Model near-term (2-3 year) and longer-term (10+ year) space needs separately.
- Confirm fume hood and exhaust capacity against actual, not nominal, headcount. Exhaust air-handling capacity is one of the hardest and most expensive systems to expand after construction.
- Check floor-to-floor height and shaft space before assuming any dry-configured floor can later become wet lab. This is the most common planning mistake noted by lab design firms.
- Plan safety fixture placement (eyewash, safety shower, spill kits) against code travel-distance requirements early — moving them later means moving plumbing.
- Separate equipment planning from space-type planning. Dry-lab-housed instrumentation (imaging, sequencing, electron microscopy) can have vibration and EMI requirements as demanding as any wet-lab environmental control — don’t assume “dry” means “unconstrained.”
- Build in flex/shell capacity where budget allows, rather than committing 100% of new space definitively to one type at initial build-out.
Equipment and Lifecycle Planning
Whichever space type a given research program occupies, the instrumentation inside it has its own planning horizon — procurement lead time, maintenance/calibration schedule, and eventual replacement or disposition. See CASRAI’s lab equipment lifecycle assessment entry for how institutions track equipment from acquisition through end-of-life, a planning discipline that applies to both wet and dry lab instrumentation alike.
Frequently Asked Questions
What is the main difference between a wet lab and a dry lab?
A wet lab is built to handle chemicals, biological samples, or other liquids and requires plumbing, chemical-resistant surfaces, and specialized ventilation (fume hoods, high air-change-rate HVAC). A dry lab supports computational, analytical, or instrumentation-based work that doesn’t involve open handling of hazardous liquids, and instead prioritizes electrical/data infrastructure and, often, vibration or EMI control.
Can one lab space function as both wet and dry lab?
Not effectively as a single undifferentiated space. Most facilities instead pair adjacent wet and dry zones — bench work in the wet lab, data analysis and write-up in an adjoining dry lab or write-up area — or design “flex”/shell space that can be converted from dry to wet configuration later (see the hybrid lab space section above). A true dual-use room would need to carry the full wet-lab MEP burden (ventilation, plumbing, chemical-resistant finishes) even when used for dry work, which is rarely cost-effective.
Why is wet lab space so much more expensive to build than dry lab space?
The cost difference is driven almost entirely by mechanical, electrical, and plumbing (MEP) systems: fume exhaust ductwork, high-volume once-through air handling, specialty plumbing and gas lines, and chemical-resistant finishes are all capital-intensive to install and are largely absent from dry lab construction. Reported life-sciences fit-out and ground-up construction costs run into the hundreds of dollars per square foot in major research real estate markets, well above standard office or dry-lab build-out.
What equipment is typically found in a dry lab versus a wet lab?
Dry labs typically house computer workstations, servers, imaging or metrology instruments, robotics, and electronics prototyping equipment. Wet labs typically house benchtop equipment such as centrifuges, autoclaves, analytical balances, incubators, and fume hoods or biosafety cabinets. Some equipment categories (certain microscopy or spectroscopy instruments) can sit in either space type depending on whether the sample requires wet chemical preparation on-site.
How much wet lab versus dry lab space does a new facility need?
There is no universal ratio — it depends entirely on the mix of research activity the facility will house. The practical approach is to inventory actual planned research activity by type (not by department or job title), model near-term and longer-term headcount and equipment needs separately for wet-bench versus computational/analytical work, and, where budget allows, build a portion of the program as flexible shell space that can convert from dry to wet use as needs evolve, rather than locking in a fixed split at initial construction.
