Digital Realty Trust Adopts New BREEAM Sustainability Standards

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

DUBLIN, March 30 /PRNewswire-FirstCall/ -- 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.