Why choose OSI?
Pioneers of Innovation, Champions of Efficiency, Masters of Variety.
1627 and 1629 K St are two blocks from the White House and a block from Farragut Square Metro. You are in the central business district and a DC Hubzone.
The office is open Monday-Friday from 7 a.m. till 9 p.m. and Saturday from 8 a.m. to 6 p.m. For clients in good standing, Sunday access is available.
If you don't see a combination that fits, call or email us to discuss the combination of services you need. Everything is month-to-month and tailored to fit your needs.
You only pay for the services you use and not a penny more.
OSI is the oldest continuously operated business center under one ownership in the United States, having started under the corporation Washington Office, Inc., in 1981.
We have the most economical on-demand system in the nation's capital. We encourage you to compare our prices to any other facility in Washington, D.C.
Unlike other facilities, we do not charge an installation fee, deposits, or other office impediments to starting up.
Make snail mail into email. Voicemail messages are transcribed and emailed. All records easily available. Administer your entire office from your laptop, and while in the office, use our 100 Mbps symmetric fiber access.
Connect with more than 1,500 other businesses. Publish your own credentials.
You may be amazed. You can reserve offices, pay your invoices, view your received mail, and modify your account data. Come on in, and let us show you how you can manage your office from anywhere in the world.
Founded over four decades ago specifically for attorneys, OSI has evolved to be the most technically advanced officing system in the area, tailored to attorney needs, while continuing to be the best value option. We can scan mail, email messages, give you telephone and other use records, publish your credentials, and give you a bar member discount.
Join more than 120 other mental health professionals. Start your practice for $35 a month. OSI provides office space for mental health professionals as needed at
OSI, established in 1981 under Washington Office, Inc., holds the distinction of being the oldest continuously operated business center in the United States under single ownership. Founded by C. Jack Pearce, an experienced anti-trust attorney with a background in the U.S. Department of Justice and the White House Office of Consumer Affairs, OSI initially catered to out-of-town attorneys. It quickly expanded its services to include Washington area attorneys and diversified to support businesses of all types, from startups to established companies.
OSI offers more than just a prestigious business address on K Street, near the White House and major subway lines. Our service plans include on-site office access, mail scanning and emailing, immediate notification for visitor arrivals, and assistance in obtaining a DC business license. Our customer portal facilitates easy account management, networking opportunities with other OSI clients, and the ability to tailor services as your business evolves.
Our offerings have grown from our origins as one of the first 'virtual offices' to include full-time, exclusive-use office spaces. In partnership with Source Office Suites, OSI extends its services across the Washington metropolitan area, providing a variety of office solutions that adapt to mobile, branch, home, or traditional office operations.
Located at the strategic Farragut Square, near the White House, OSI's enduring commitment to economical and efficient service has established it as a unique provider in the heart of the nation’s capital. We invite you to explore testimonials from our valued clients and discover the diverse services OSI has to offer.