16 Weeks Instead of 16 Months
Traditional data centre construction takes 18-30 months from ground-breaking to first rack powered. Modular construction compresses this to 12-20 weeks for the modular components, with total project timelines of 6-10 months including site preparation. When hyperscalers are committing $280 billion and every month of delay represents millions in lost revenue, speed is worth a premium.
What "Modular" Means
Modular data centres are prefabricated in a factory, transported to site, and assembled. The degree of prefabrication ranges from partial to complete:
**Modular components (partial prefab):** - Pre-assembled power modules (switchgear, UPS, PDUs in a single skid) - Pre-assembled cooling modules (chillers, pumps, piping on a single platform) - Pre-wired overhead busway systems - Factory-tested and shipped as integrated units - Installed in a conventionally constructed building shell
**Purpose-built modular units (full prefab):** - Self-contained data centre modules (typically 40-53 ft shipping container form factor or custom enclosures) - Integrated power, cooling, fire suppression, and monitoring - IT capacity: 200 kW to 2 MW per module - Stackable and linkable for multi-megawatt deployments - Can operate independently or connect to a central utility plant
Cost Comparison
**Traditional construction:** - US national average: $11.3M/MW - Timeline: 18-30 months (ground-breaking to powered rack) - Customisation: Unlimited - Quality variability: Depends on local contractors and site conditions
**Modular construction:** - Cost: $8-12M/MW (comparable or slightly lower than traditional) - Timeline: 6-10 months (order to powered rack) - Customisation: Limited to manufacturer's configurations and options - Quality: Factory-controlled environment produces more consistent builds
**Where modular saves money:** - Labour: Factory labour is 20-40% less expensive than skilled on-site construction labour in many markets - Schedule compression: Earlier revenue generation offsets any cost premium - Predictability: Fixed-price contracts with performance guarantees - Waste reduction: Factory fabrication generates 50-70% less construction waste
**Where modular costs more:** - Transportation: Shipping oversized modules cross-country costs $15,000-50,000 per unit - Site preparation: Foundations, utility connections, and site grading still require traditional construction - Customisation: Any deviation from standard configurations adds cost and timeline
Deployment Models
**Edge deployment (1-5 MW):** Single or clustered modules deployed at the network edge — cell tower bases, suburban office parks, industrial sites. Self-contained with integrated cooling and power conditioning. - Use case: Content delivery, 5G, IoT processing, remote/rural connectivity - Timeline: 8-16 weeks from order - Typical configuration: 2-10 modules with shared generator and utility connection
**Campus expansion (5-50 MW):** Modular units deployed on an existing data centre campus to add capacity faster than traditional expansion. - Use case: Hyperscale capacity expansion, temporary surge capacity, bridge to permanent construction - Timeline: 12-20 weeks from order - Typical configuration: Pod-based deployment connecting to campus power and cooling plant
**Greenfield modular campus (50-200+ MW):** Entire campus built from modular components around a central utility plant. - Use case: Hyperscale new-build where speed-to-market is the primary objective - Timeline: 8-14 months for first phase (versus 24-36 months traditional) - Typical configuration: Central power and cooling utility plant with modular IT halls
Leading Vendors
**Vertiv (formerly Emerson Network Power):** - SmartMod and SmartAisle product lines - Capacity: 100 kW to 2.4 MW per module - Largest installed base globally - Integrated power, cooling, and monitoring
**Schneider Electric:** - EcoStruxure modular data centre line - Prefabricated power and cooling modules - Strong in European markets - Integration with Schneider building management systems
**Celestica:** - Factory-built modular data centres for hyperscale customers - Reported contracts with multiple cloud providers - Focus on AI-optimised configurations with liquid cooling
**Compass Datacenters:** - Proprietary modular construction methodology - 17-week build cycle for multi-MW data halls - Used this approach to scale rapidly across US markets
**Flex (formerly Flextronics):** - Contract manufacturer building modular data centres for hyperscalers - Multiple factory locations globally - Focus on cost optimisation through manufacturing scale
When Modular Makes Sense
**Strong fit:** - Time-to-market is the primary constraint (GPU deployment waiting on facilities) - Remote or edge locations where skilled construction labour is scarce - Phased deployment where capacity can be added incrementally as demand materialises - Temporary or semi-permanent installations (disaster recovery, military, events) - Markets with constrained construction labour markets
**Poor fit:** - Highly customised facility requirements that cannot be factory-configured - Sites with complex geotechnical conditions requiring extensive foundation work - Projects where lowest absolute cost (not speed) is the primary objective - Dense urban sites with restricted access for module delivery
Evaluating Modular Solutions
Use the Score Tool to assess site viability for modular deployment. Key factors: utility power availability (modular does not solve power procurement), site access for oversized deliveries, and foundation conditions. Contact our advisory team for vendor-neutral modular strategy guidance.