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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



Consigli Construction Co., Inc.

1250 H Street NW

Suite 975

Washington, DC 20005

202.800.2800


DC Preservation League


641 S Street NW

Suite 300

Washington, DC 20001

202.783.5144


Marble Partners


GWWO Inc./Architects

800 Wyman Park Drive
Baltimore, MD 21211
410.332.1009

SGH - Performance Beyond Expectation

Simpson Gumpertz & Heger (SGH)

1625 I Street NW

Suite 900

Washington, DC 20006

202.239.4199


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



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


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

Logo

    Ally Charter Bus DC

     2141 P Street NW

     Suite 103

     Washington DC 20037

     703.286.7418



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


Maids 2 Mop DMV

 301.302.7944

Washington DC charter bus

      National Charter Bus DC

       1801 Columbia Road NW

       Suite 205

       Washington DC 20009

       202.250.3441



      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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