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Current Partners- click the logo to go to the partner's website

Granite Partners


Consigli Construction Co., Inc.

1250 H Street, NW

Suite 975

Washington, DC 20005

202.800.2800


Seal Engineering, Inc.

3323 Duke St.

Alexandria, VA 22314

703.823.6366

Marble Partners


Building Envelope Consultants and Scientists, LLC.

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


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 St. #212
Alexandria, VA 22314
267.605.6050


Citadel DCA

4201 Massachusetts Ave. NW

Washington, DC 20016

202.820.3605


Evergreene Architectural Arts

3009 Kaverton Rd

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

106 Commerce St.,

Frederick, MD 21701

301.698.5784


Prosoco

3741 Greenway Cir, 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 Incorporated (CSI) | LinkedIn

Contracting Specialists, Inc.

5127 Berwyn Road

College Park, MD 20740

301.513.5226


Genco Masonry

4853 Cordell Ave. #6

Bethesda, MD 20814

301.657.3340



Grunley Construction

15020 Shady Grove Rd.

Rockville, MD 20850

240.399.2000

Washington DC charter bus

     National Charter Bus DC

     1801 Columbia RD NW

     Suite 205

     Washington DC 20009

     202.250.3441


Special thanks to our Individual APT DC Friend members: 

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

© 2021 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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