Expert guide
Design & Engineering for data centers in India: what procurement teams need to know
Why the first three months decide the next fifteen years
Topology, density, cooling architecture, structural grid and the electrical scheme are fixed in the first three months of a data center project and cannot be changed cheaply once long-lead equipment is ordered. Yet many Indian projects move from a concept sketch to an EPC tender with the basis of design still open, and then pay for every unresolved decision as a variation. The economics of design consultancy are simple: fees of 2 to 4 percent of construction cost sit against decisions that move the capital budget by 20 percent and the operating cost by more.
The consulting market has matured. International design practices, large Indian engineering consultancies and specialist boutiques offer concept-to-detailed design, and Uptime-accredited designers are available for Tier work. What varies is independence. A designer tied to an EPC or an equipment vendor has incentives the owner does not share, and a free design from a vendor is a specification that fits one vendor.
The basis of design
The basis of design is the document that turns intent into engineering: IT load and phasing, rack densities by hall, the Tier or rating target, redundancy for electrical and mechanical systems, design ambient (45 degrees in most Indian metros), supply air and water temperatures, PUE and WUE targets, fire strategy and suppression agents, network and meet-me room architecture, security layers, and the standards hierarchy (Uptime, TIA-942, ASHRAE, NBC, IS codes, NFPA). It should be signed off by the owner, the operations lead and, where there is one, the anchor tenant before any drawing is produced.
Two decisions deserve particular care. First, hall mix: a single-density design for a market that is moving to mixed and high-density workloads will be wrong within two years, so specify the facility water loop and the electrical headroom for liquid-cooled rows even if the first phase is air cooled. Second, redundancy: distributed redundant electrical with N+1 mechanical meets Tier III at materially lower cost than 2N, and the basis of design should state the topology explicitly rather than leave it to the EPC.
From concept to detailed design
Concept and schematic design produce layouts, the single-line diagram, cooling schematics, the structural grid and a cost plan, and this is the point for an independent peer review. Detailed design delivers the full drawing set, specifications written for competitive tender, bills of quantities and the engineering studies: computational fluid dynamics for the white space, energy modelling for the PUE claim, short-circuit, protection coordination and arc-flash studies for the electrical system, and seismic and wind analysis for the structure.
Specifications should be performance-based where the market offers several compliant products and prescriptive only where interoperability demands it. That is what allows comparable bids. The design package should also include the commissioning scope, the cause-and-effect matrix for fire, security, power and cooling, and the documentation standard the contractor must deliver as built.
Owner's engineer and construction support
Separating roles protects the owner at the points where errors are cheapest to fix. The design consultant produces the design; an owner's engineer reviews it, evaluates tenders, reviews shop drawings and method statements, witnesses factory and site tests and monitors delivery against the specification; the contractor executes. The owner's engineer costs 1 to 2 percent of construction value and is the single most reliable defence against a contractor's quality drifting under schedule pressure.
Construction support from the designer continues through shop drawing review, responses to site queries, witness of integrated systems testing and the as-built record. Hold back a portion of the design fee until the as-built documentation is complete; it is the document set operations will live with.
Tier certification and the design record
Where Uptime Tier certification is planned, the Tier Certification of Design Documents reviews the design against the Tier standard before construction, and the Certification of Constructed Facility verifies it after commissioning. Accredited Tier designers (ATD) on the design team and accredited Tier specialists (ATS) for the review shorten the process and avoid redesign. TIA-942 rating is the alternative customers accept in several sectors; decide which the tenancy requires before design starts.
How we select and manage designers
We scope the engagement (feasibility, concept, detailed design, owner's engineer or peer review), shortlist firms on Indian data center delivery at the target Tier and scale, accreditation where required, multidisciplinary depth and independence from EPCs and vendors, and run a fee and approach competition with reference checks. During the engagement we hold the designer to the basis of design and the programme, and we bring in a peer reviewer at concept stage when the owner wants an independent check.
A peer review of the basis of design before tender typically removes 5 to 10 percent of capex and most of the change orders that follow.
What we cover
Scope of the service line
- Feasibility and concept design
- Basis of design and detailed engineering
- Electrical topology, protection and arc-flash studies
- CFD and cooling design
- Network topology and meet-me room design
- Owner's engineer and peer review
How procurement works
From brief to contract
Feasibility
Site constraints, capacity, phasing and a capex and PUE envelope are tested before anything is committed.
Basis of design
Redundancy topology, densities, cooling architecture, electrical scheme, fire strategy, network architecture and the Tier target are written down and signed off.
Concept and schematic design
Layouts, single-line diagrams, cooling schematics and structural grid, with a cost plan and a peer review.
Detailed design
Full drawings, specifications and bills of quantities for tendering, with CFD, arc-flash and protection coordination studies.
Construction support
Shop drawing review, site queries, witness testing and as-built documentation through to commissioning.
Advisor note
Independent review pays
A peer review of the basis of design before tender typically removes 5 to 10 percent of capex through right-sized redundancy and equipment, and avoids change orders later.
What to evaluate
Criteria that separate a safe award from an expensive one
| Criterion | What good looks like | Why it matters |
|---|---|---|
| Independence | No commercial tie to EPCs or equipment vendors | Specifications should serve the owner |
| Indian delivery record | Facilities designed and built in India at your Tier and scale | Climate, codes and supply chain differ |
| Accreditation | Uptime ATD or ATS where Tier certification is planned | Certification needs accredited input |
| Multidisciplinary depth | Electrical, mechanical, structural, fire, network and controls in one team | Interfaces are where designs fail |
| Modelling | CFD, energy modelling and protection studies as deliverables | Evidence rather than assertion |
| Documentation | Specifications written for competitive tender, not for one vendor | Enables comparable bids |
Benchmarks
Indicative lead times and cost ranges
| Item | Typical range | Note |
|---|---|---|
| Feasibility study | 3 to 5 weeks | Capex and PUE envelope with site constraints |
| Basis of design and concept | 6 to 10 weeks | Including peer review |
| Detailed design for tender | 10 to 16 weeks | Scales with facility size |
| Design fees | 2 to 4 percent of construction cost | Owner's engineer separately, 1 to 2 percent |
Indicative figures from MyDCNeeds engagements and supplier quotations, 2025 to 2026. Project-specific numbers are confirmed during scoping.
Common mistakes
What we see go wrong
- 01Issuing an EPC tender on a concept design, then absorbing change orders for every open decision.
- 02Using an equipment vendor's free design and discovering the specification only fits that vendor.
- 03Skipping peer review to save weeks, then losing months in redesign.
- 04Designing a single-density hall for a market that is moving to mixed and high-density workloads.
Standards and regulation
The framework this work sits inside
- Uptime Institute Tier Standard: Topology and Operational Sustainability
- TIA-942-B rated infrastructure
- ASHRAE TC 9.9; ASHRAE 90.4
- National Building Code 2016; IS 456, IS 800, IS 1893 structural codes
- NFPA 70, 72, 75 and 2001 for electrical and fire
Glossary
Terms used in this guide
- Basis of design
- The document that records design intent, performance targets and the assumptions behind them.
- Owner's engineer
- An independent engineer who represents the owner's interests during design review and construction.
- CFD
- Computational fluid dynamics, used to model airflow and temperature in the white space.
- Single-line diagram
- The schematic showing the electrical distribution from grid to rack.
Questions
Frequently asked
What does data center design cost in India?+–
Design fees typically run 2 to 4 percent of construction cost for feasibility through detailed design, with an owner's engineer at a further 1 to 2 percent. Against a construction cost of INR 45 to 70 crore per MW, that is a small premium for decisions that move the budget by far more.
Are your consultants Uptime accredited?+–
We match the engagement to the credential required, including Accredited Tier Designers for design and Accredited Tier Specialists for review where Tier certification is planned.
Can you work alongside our EPC contractor?+–
Yes. Owner's engineer and peer review engagements sit beside your EPC, review its design and shop drawings, witness tests and protect your interests during delivery without disturbing the contract.
How long does a detailed design take?+–
Indicatively 3 to 5 weeks for feasibility, 6 to 10 weeks for basis of design and concept including peer review, and 10 to 16 weeks for detailed design ready for tender, scaling with facility size.
Should we accept a free design from an equipment vendor?+–
Only as a reference. A vendor's design becomes a specification that fits one vendor and removes competitive tension from procurement. An independent basis of design costs little and keeps the market open.
What studies should a design package include?+–
Computational fluid dynamics for the white space, energy modelling supporting the PUE claim, short-circuit, protection coordination and arc-flash studies, structural seismic and wind analysis, and a cause-and-effect matrix for fire, security, power and cooling.
