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Current Partners

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Granite Partners


The Christman Company


22560 Glenn Drive, Suite 108

Sterling, VA 20164

703.740.5645


Clark Construction Company

7900 Westpark Drive, Suite T300

McLean, VA 22102

571.350.3500



Consigli Construction Co., Inc.

1250 H Street NW, Suite 975

Washington, DC 20005

202.800.2800


DC Preservation League


1328 Florida Avenue NW, 2nd Floor

Washington, DC 20009

202.783.5144



Lorton Stone, LLC

7544 Fullerton Ct.

Springfield, VA 22153

703.923.9440



Seal Engineering, Inc.

3323 Duke Street

Alexandria, VA 22314

703.823.6366


SGH - Performance Beyond Expectation

Simpson Gumpertz & Heger (SGH)

1625 I Street NW, Suite 900

Washington, DC 20006

202.239.4199




The Whiting-Turner Contracting Company

300 East Joppa Road

Baltimore, MD 21286

410.821.1100


Marble Partners


architrave p.c., architects

420 10th Street SE

Washington, DC 20003
202.544.1640



EHT Traceries

440 Massachusetts Avenue NW
Washington, DC 20001
202.393.1199


GWWO Inc./Architects

800 Wyman Park Drive
Baltimore, MD 21211
410.332.1009


Markon LLC

400 South Maple Avenue, Suite 230

Falls Church, VA 22046

703.639.0922


WJE Announces 2018 Senior Staff Promotions | News | WJE

Wiss, Janney, Elstner Associates, Inc.

2941 Fairview Park Drive, Suite 300

Falls Church, VA 22042

703.641.4601


Sandstone Partners

Aeon Preservation Services LLC

Aeon Preservation Services, LLC


4703 Annapolis Road

Bladensburg, MD 20710

301.563.9308



Architectural Sales Group LLC

4109 46th Street

Bladensburg, MD 20710



Building Conservation Associates Inc.

950 N. Washington Street, #212
Alexandria, VA 22314
267.605.6050


Building Envelope Consultants and Scientists, LLC

1103 N. Washington Street, 3rd Floor
Baltimore, MD 21213
888.206.6154


Citadel DCA

4201 Massachusetts Avenue NW

Washington, DC 20016

202.820.3605


Evergreene Architectural Arts

3009 Kaverton Road

District Heights, MD 20747

866.895.2079



The Gilders' Studio Inc.

17636 Prince Edward Drive
Olney, MD 20832
301.929.9450


National Park Service - Historic Preservation Training Center


4801 Urbana Pike

Frederick, MD 21704

301.698.5784


Page

1615 M Street NW, Suite 700

Washington, DC 20036

202.909.4900


Prosoco

3741 Greenway Circle

Lawrence, KS 66046

800.255.4255

Home - Vertical Access

Vertical Access

P.O. Box 4135

Ithica, NY 14850

607.257.4049

Limestone Partners


Cintec

200 International Circle, Suite 5100

Hunt Valley, MD 21030

410.761.0765


Contracting Specialists, Inc.

5127 Berwyn Road

College Park, MD 20740

301.513.5226


Genco Masonry

4853 Cordell Avenue, #6
Bethesda, MD 20814

301.657.3340




Grunley Construction

15020 Shady Grove Road
Rockville, MD 20850

240.399.2000


Historic Plaster Conservation Services, Mid-Atlantic Region

330 Belleville Turnpike

North Arlington, NJ 07031

201.988.1820



National Charter Bus DC

1801 Columbia Road NW, Suite 205

Washington DC 20009

202.250.3441



Vintage Renovation and Construction, Inc.

600 N. Loudoun Street

Winchester, VA 22601

540.545.8880


Washington National Cathedral

3101 Wisconsin Avenue NW

Washington, DC 20016

202.537.6200


Special thanks to our Individual APT DC Friend members: 

  • William Brenner
  • Mary Oehrlein
  • Tobin Tracey
  • Tom Vitanza, AIA, NCARB & Rebecca Stevens, AIA, NCARB

© 2024 The Association for Preservation Technology, Washington DC Chapter. P.O. Box 9813 Washington, DC 20016
APT DC is a 501(c)3 non-profit organization based in Washington, DC. ~ All rights reserved.

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