Digital Realty Trust Adopts New BREEAM Sustainability Standards

DUBLIN - Adopting standards at the very beginning pays dividends through whole
life of building

Sustainability, reduced running costs and increased long term building
value are among the reasons that Digital Realty Trust, the world’s largest
wholesale datacentre provider, is adopting the newly announced BREEAM
(Building Research Establishment Environmental Assessment Method) Bespoke
datacentre standards for the future construction of its datacentres.

BREEAM Bespoke was first developed in 2000 to cover buildings not
included in the mainstream environmental assessment schemes for offices,
retail, healthcare and education.

Paul Gibbon, Director of Sustainability, BRE Global, said: “We are seeing
a rise in interest in assessments for specialist building types, especially
datacentres. Over the first 12 months of the datacentre scheme we will be
refining it with feedback from actual assessments and in time this ’scheme’
will become part of the standard suite for BREEAM.

“The advantage of scheme development using the framework of BREEAM
Bespoke is that it reduces the cost of assessments and provides a ready made
set of criteria against which developers, designers and clients can assess
their buildings,” he added.

Jim Smith, Chief Technology Officer for Digital Realty Trust, said,
“Adopting the BREEAM standards right at the beginning of the initial design
stages will not only build in reduced running costs because the building’s
insulation and cooling will be optimised, but in the longer term the value of
the building can be expected to be higher than a comparable building which is
not BREEAM accredited.

“The BREEAM certification process has tremendous value for the datacentre
industry and we are adopting its guidelines as best practices for the way we
design, build and operate datacentres around the world. This is the latest in
a long list of industry firsts that Digital Realty Trust has achieved for
energy efficiency and environmental responsibility in the datacentre field,
and we are very proud to be leading the way in green datacentres,” he
continued.

“We were the first company to achieve similar certification for a
datacentre in the United States, the first company to adopt the Green Grid’s
PUE energy efficiency measurement protocol, and the first company to publicly
publish energy efficiency data about its facilities. We also contribute a
significant portion of our time to industry efforts to establish green
datacentre standards, and to educating datacentre professionals about how to
increase energy efficiency.”

Early BREEAM assessment standards for datacentres were carried out as
part of Digital Realty Trust developing a facility for a major financial
institute which was completed late in 2008 which achieved an Excellent
rating. The datacentre uses a unique heat recovery system which results in
energy savings of up to 83 percent compared to conventional gas fired
boilers. It also uses a building automation system which responds to changing
atmospheric conditions making the most of when the ambient temperature is
low.

About BREEAM and BRE Global

BREEAM (BRE Environmental Assessment Method) is the leading and most
widely used environmental assessment method for buildings around the world,
with over 110,000 buildings certified and over half a million registered. It
sets the standard for best practice in sustainable design and has become the
de facto measure used to describe a building’s environmental performance.
Credits are awarded in eight categories according to performance. These
credits are then added together to produce a single overall score on a scale
of Pass, Good, Very Good, Excellent and Outstanding which is also reflected
in a star rating from 1 to 5 stars. The operation of BREEAM is overseen by an
independent Sustainability Board, representing a wide cross-section of
construction industry stakeholders. www.breeam.org

BRE Global Limited (incorporating LPCB & BREEAM) is an independent third
party approvals body offering certification of fire, security and
sustainability products and services to an international market. BRE Global
mission is to ‘Protect People, Property and the Planet’ and is a trading
subsidiary of the BRE Trust, the registered research and education charity
which owns the BRE Group. For further information please contact: BRE Global,
Garston, Watford, WD25 9XX, Tel: 01923 664100, Fax: 01923 664910, Email:
enquiries@breglobal.com or visit www.breglobal.com

About Digital Realty Trust, Inc.

Digital Realty Trust owns, acquires, redevelops, develops and manages
technology-related real estate. The Company is focused on providing Turn-Key
Datacentre(SM) and Powered Base Building(SM) datacentre solutions for
domestic and international tenants across a variety of industry verticals
ranging from information technology and internet enterprises, to
manufacturing and financial services. Digital Realty Trust’s 75 properties,
excluding one property held as an investment in an unconsolidated joint
venture, contain applications and operations critical to the day-to-day
operations of technology industry tenants and corporate enterprise datacentre
tenants. Comprising approximately 1.2 million square metres (13.0 million
square feet) as of December 31, 2008, including approximately 150,000 square
metres (1.6 million square feet) of space held for redevelopment, Digital
Realty Trust’s portfolio is located in 27 markets throughout Europe and North
America. For additional information, please visit Digital Realty Trust’s
website at www.digitalrealtytrust.com.

Safe Harbor Statement

This press release contains forward-looking statements that are based on
current expectations, forecasts and assumptions that involve risks and
uncertainties that could cause actual outcomes and results to differ
materially, including statements related to the future cost saving for and
values of BREEAM certified building and the Company’s future plans for
implementing the BREEAM standards. These risks and uncertainties include
adverse economic or real estate developments in the Company’s markets;
general economic slow-downs or recessions; reductions in information
technology spending; limited access to capital and liquidity issues for us,
our customers or potential customers; difficulties in or inability to lease
space, including redeveloped space; construction and development delays;
increased development costs; tenant bankruptcies or defaults under leases by
tenants; failure to commence rental payments on time under signed leases;
increased interest rates; increased operating costs; failure to obtain
necessary outside financing; decreased rental rates or increased vacancy
rates; difficulties in identifying properties to acquire; completing
acquisitions at all or at acceptable return levels; failure to successfully
operate properties; failure of existing, acquired or redeveloped properties
to perform as expected; reductions in property values; failure to maintain
the Company’s status as a REIT; environmental uncertainties and risks related
to natural disasters; financial market fluctuations; changes in foreign
currency exchange rates; risks of operating in foreign markets; and changes
in real estate and zoning laws and increases in real property tax rates. For
a further list and description of such risks and uncertainties, see the
reports and other filings by the Company with the United States Securities
and Exchange Commission, including the Company’s annual report on Form 10-K
for the year ended December 31, 2008. The Company disclaims any intention or
obligation to update or revise any forward-looking statements, whether as a
result of new information, future events or otherwise.

For Additional Information:

A. William Stein
Chief Financial Officer and
Chief Investment Officer
Digital Realty Trust, Inc.
+1-415-738-6500

Pamela A. Matthews
Investor/Analyst Information
Digital Realty Trust, Inc.
+1-415-738-6500

Bernard Geoghegan
Senior Vice President
International Operations
Digital Realty Trust, Inc.
+353-(1)-2450650

Source: Digital Realty Trust, Inc.

A. William Stein, Chief Financial Officer and Chief Investment Officer, +1-415-738-6500, or Pamela A. Matthews, Investor/Analyst Information, +1-415-738-6500, or Bernard Geoghegan, Senior Vice President, International Operations, +353-(1)-2450650, all of Digital Realty Trust, Inc.