By: Darren Watkins, managing director for VIRTUS Data Centres

With the ever-changing enhancements taking place in today’s technological landscape, in-house data centers are continually met with the challenge of providing enough space, power and cooling. As companies grow and scale, it’s nearly a forgone conclusion that they’re going to need more data center capacity. Businesses across a variety of industries—from healthcare, to financial services, to retail, and everything in between—are all amassing large quantities of data and evolving capabilities that need serious computing power. Not all workloads are suited to the cloud, so they must decide whether to “build” a new in-house data center or “buy” space in a colocation facility.

The question brings about the classic build vs. buy conundrum that raises its head whenever it’s time to provision for additional capacity, IT infrastructure and operations. Does it make more sense to build a new data center, or buy (lease, or outsource IT needs to a colocation provider)?

To help make a decision, the businesses need to evaluate current and future infrastructure requirements. If they are variable, cloud could be an attractive option, but if there is a need for fixed or steady growth, or for owning hardware for other reasons, a data center build or lease is worth considering. And there are of course several advantages and disadvantages to all approaches. In building, companies have complete and total control over all aspects of the data center. In buying, companies get many of the benefits of having a data center without taking on the massive resource investment necessary to build their own.

Today, the tendency is toward outsourcing the data center in whole or in part, in an effort to concentrate resources on core business. As a result, the data center market has grown exponentially and become more sophisticated. All current market trends including cloud adoption, virtualization and the internet-of-things (or internet-of-everything as it has been called) only point to this growth continuing at a rapid pace. Traditionally, building a fully owned data center for the larger enterprise has been the obvious choice as it made sense financially and was often the only option. But over the years the scale at which you need to build a data center to ensure its financial viability has become increasingly larger; recent independent industry reports indicate it is only feasible if you have requirements of more than approximately 15-17MW of capacity.

For example, to illustrate the scale at which a data center needs to be built to be financially and economically efficient, VIRTUS Data Centre’s first data center in Enfield has a total IT load of 4.2 MW. Recently, it brought a single data hall online that is almost 6MW on its own.

In summary, you need to build to huge scale in order to make a data center financially efficient. This scale has grown over five times in the past 15 years, and looks likely to continue to increase over the next 10 years and beyond.


Let’s explore the pros and cons of build vs buy…

Bespoke specification:

The main benefit of owning a data center is control, including access, maintenance and future improvements. But it can also be a drawback; hardware refreshes are required every three to five years and data center operation may not be a primary competency of the IT department requiring additional staff or at least additional OpEx.

Should an organization choose to build their own data center, there is of course the advantage that they can do so to their exact specification and potentially in their ideal location. This may often appear to be an advantage over buying third party owned colocation space. However, many data center providers now build their data centers in a modular fashion, and most are in highly optimized locations. The modular approach allows customers to be involved in the design specification and fit out of their space. This level of customer input enables a bought colocation data center to be flexibly customized almost to the same level as building their own environment, whilst harnessing the expertise of the operator.

Financial flexibility:

Financial flexibility is an extremely important consideration for any data center deployment, whether it is an internal corporate investment, or outsourced to a third-party provider. Setting up data centers is hugely capital intensive and demanding on CapEx. But there are other often overlooked costs that add up quickly e.g. fire suppression and detection and facility staffing. Beyond this, building out the facility will often necessitate a provision for growth which in the short-term will make the facility inefficient—and sometimes this leads to investing money in space which may never be used.

Even beyond raw costs, the expense of daily operation of a highly-available data center must be taken into consideration. Does the in-house team have the experience and qualifications to keep infrastructure available 99 per cent or more of the year? Is someone available at all hours to tackle emergencies? What about maintaining and updating the facility and equipment? Maintenance costs can add up to as much as five per cent of initial building expenses annually.

Even if it is decided that building a data center will provide a return on investment in an acceptable time frame, colocation can still be advantageous. A company dedicated to data center design and operation can arguably run IT equipment more efficiently  at a higher Power Usage Effectiveness (PUE) and in a more controlled environment, extending hardware life.

When buying colocation space, most providers will give their customers flexible contracts, with terms that allow for i) the amount of space contracted to shrink or grow depending upon your actual requirements over time; ii) the amount of time the contract runs for, providing ramp up periods for installation, without having to pay full rent until everything is successfully deployed; iii) the amount of power consumed, billing only for power used on a ‘pay as you go’ plan, which maximizes budget during times of low or peak usage. These things all help to develop a more predictable expenditure model with costs that increase consistently over the life of the data center.


One other significant factor is the commitment which is made to a location when investing in your own facility, which obviously cannot change once this has been decided without significant cost. If there is any reason to want to move location, due to market or geographic changes, this is very difficult within the organization’s own built facility. However, if you outsource to a colocation provider, they will often have more than one data center and this will therefore give you far more flexibility to move your deployment to another facility – either by physically or virtually moving the servers.


Five to ten years ago, it could certainly have been argued building an owned data center was more secure, but physical, cloud and cyber security have evolved to the point where providers typically have far greater resources to invest in security than an individual company.

Availability of data center space:

Looking globally, there may be some markets that have a shortage of available colocation space, and in these instances an organization may be forced to build. In the early 2000s, this was often a likely scenario, but in 2017, there is generally a good supply of data center space globally, with most data center providers offering facilities in multiple countries in several continents. Today, data center providers are building large hyper-scale data centers which allow many customers to house their equipment and enjoy shared economies of scale within a colocation environment

In the London market, availability of data center space has been good in the past few years, with more new space being built every year. Representing around 80 per cent of the total UK data center capacity, CBRE says that London has 384MW of total data center supply (at Q3 2016), which represents 44 per cent of the total across the major European markets, which also includes Frankfurt, Amsterdam and Paris. This provides healthy competition within the market, enabling organizations to find high quality facilities at very competitive prices. It also enables organizations to deploy their servers in readily built facilities in short timeframes, which is often critical to the business and scale up with additional capacity as needed without wasted capacity or build-outs needed.

Keeping pace with the technological landscape:

As the IT industry is one of the most rapidly evolving sectors in the world, the data center colocation market needs to emulate this, as it provides the foundation to this growth industry. Data center providers commit huge resources to R&D to ensure they their facilities are built to the highest level of efficiency and invest in experienced and certified professionals. This benefit is passed to customers, enabling them to maintain a competitive edge on their competitors. This is an advantage to organizations that choose to buy outsourced colocation space, where they can be assured that the space and power they are purchasing today is future-proofed technology and efficiency for several years into the future. This alleviates the headache and expense of huge data center upgrades which would need to be made on a regular basis by the organization to their own facilities, or risk becoming increasingly inefficient over the years ahead.


More and more enterprises are now adopting a hybrid cloud model for their IT infrastructure and being able to easily reach cloud services is essential. By choosing to colocate in a third-party data center, customers are naturally in an environment with an abundance of other customers, many of whom will be offering cloud platforms and applications. This creates a natural ecosystem where customers can benefit from the services that other customers supply. Cloud solutions from providers like Google Cloud, Microsoft or AWS may be just a cross connect away within a premium data center that provides a cloud access solution, and this ease of access to pubic cloud platforms makes for a very reliable environment.

To support this, most data center have a good selection of carriers within their facilities who have provisioned extremely dense high quality fiber networks giving customers a wide choice of connections to cloud platforms and beyond. These connections are often 100 percent reliable, as fail-safe options can be aligned to support any potential outages. For an organization’s own build data center, this option is generally considered too costly and so they are often made to work with one or two service providers only, limiting their reliability and potentially increasing the risk should an issue arise.

The debate about build versus buy has raged for years. Building an in-house data center is resource-intensive and requires a good bit of experience. And that’s not all—once a data center is built, it also has to be managed, updated and administered—all of which can be incredibly complicated throughout its life. The “buy” option provides the best protection against increasing data center complexity, cost and risk, and eliminates the need to worry about uptime, technology obsolescence and future requirements. It also preserves valuable capital that can be invested in core business initiatives.

Not only is outsourcing more cost-effective, it is more scalable and flexible. It also provides nearly all of the upside of having an in-house data center without the resource drain. More and more organizations have made the decision to move from their old and often expensive and inefficient facilities into high quality, third party owned and managed data centers. They are no longer looking to build their own data centers and many that did are seeking options to revert to a colocation/cloud solution and remove the considerable real estate costs from their businesses. The evidence shows that total cost of owning a data center far outweighs the perceived benefits, and it looks like the argument in favor of “buy” has gained the upper hand once and for all.


About the Author: 

Darren Watkins, Managing Director of VIRTUS Data Centresbegan his career as a graduate Military Officer in the RAF before moving into the commercial sector. He brings more than 20 years experience in telecommunications and managed services gained at BT, MFS Worldcom, Level 3 Communications, Attenda and COLT. He joined the VIRTUS team from euNetworks where he was Head of Sales for the UK, leading market changing deals with a number of large financial institutions and media agencies, and growing the company’s expertise in low latency trading. Additionally, he sits on the board of one of the industry’s most innovative mobile media mdvertising companies, Odyssey Mobile Interaction, and is interested in all new developments in this sector. Darren has an honours degree in Electronic and Electrical Engineering from University of Wales, College Swansea.