Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate and Accumulated Depreciation

v3.10.0.1
Schedule III - Real Estate and Accumulated Depreciation
12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]  
Schedule III-Real Estate and Accumulated Depreciation
Corporate Office Properties Trust and Subsidiaries and Corporate Office Properties, L.P. and Subsidiaries
Schedule III—Real Estate and Accumulated Depreciation
December 31, 2018
(Dollars in thousands)
 
 
 
Initial Cost
 
Gross Amounts Carried At Close of Period
 
 
 
Property (Type) (1)
Location
Encumbrances (2)
Land
Building and Land Improvements
Costs Capitalized Subsequent to Acquisition
Land
Building and Land Improvements
Total (3)(4)
Accumulated Depreciation (5)
Year Built or Renovated
Date Acquired (6)
100 Light Street (O)
Baltimore, MD
$
48,473

$
26,715

$
58,343

$
8,065

$
26,715

$
66,408

$
93,123

$
(13,232
)
1973/2011
8/7/2015
1000 Redstone Gateway (O)
Huntsville, AL
10,390


20,533

5


20,538

20,538

(2,978
)
2013
3/23/2010
1100 Redstone Gateway (O)
Huntsville, AL
10,917


19,593

6


19,599

19,599

(2,435
)
2014
3/23/2010
114 National Business Parkway (O)
Annapolis Junction, MD

364

3,109

118

364

3,227

3,591

(1,401
)
2002
6/30/2000
1200 Redstone Gateway (O)
Huntsville, AL
12,616


22,389



22,389

22,389

(2,824
)
2013
3/23/2010
1201 M Street (O)
Washington, DC


49,785

8,619


58,404

58,404

(14,892
)
2001
9/28/2010
1201 Winterson Road (O)
Linthicum, MD

2,130

16,601

488

2,130

17,089

19,219

(4,665
)
1985/2017
4/30/1998
1220 12th Street, SE (O)
Washington, DC


42,464

7,355


49,819

49,819

(13,674
)
2003
9/28/2010
1243 Winterson Road (L)
Linthicum, MD

630



630


630


(7)
12/19/2001
131 National Business Parkway (O)
Annapolis Junction, MD

1,906

7,623

3,962

1,906

11,585

13,491

(6,697
)
1990
9/28/1998
132 National Business Parkway (O)
Annapolis Junction, MD

2,917

12,259

4,666

2,917

16,925

19,842

(9,325
)
2000
5/28/1999
133 National Business Parkway (O)
Annapolis Junction, MD

2,517

10,068

5,584

2,517

15,652

18,169

(9,639
)
1997
9/28/1998
134 National Business Parkway (O)
Annapolis Junction, MD

3,684

7,517

4,108

3,684

11,625

15,309

(6,036
)
1999
11/13/1998
1340 Ashton Road (O)
Hanover, MD

905

3,620

1,516

905

5,136

6,041

(2,971
)
1989
4/28/1999
13450 Sunrise Valley Road (O)
Herndon, VA

1,386

5,576

4,592

1,386

10,168

11,554

(5,295
)
1998
7/25/2003
13454 Sunrise Valley Road (O)
Herndon, VA

2,899

11,986

8,191

2,899

20,177

23,076

(10,176
)
1998
7/25/2003
135 National Business Parkway (O)
Annapolis Junction, MD

2,484

9,750

6,075

2,484

15,825

18,309

(8,783
)
1998
12/30/1998
1362 Mellon Road (O)
Hanover, MD

950

3,864

206

950

4,070

5,020

(414
)
2006
2/10/2006
13857 McLearen Road (O)
Herndon, VA

3,507

30,177

2,806

3,507

32,983

36,490

(10,850
)
2007
7/11/2012
140 National Business Parkway (O)
Annapolis Junction, MD

3,407

24,167

1,487

3,407

25,654

29,061

(9,577
)
2003
12/31/2003
141 National Business Parkway (O)
Annapolis Junction, MD

2,398

9,538

4,815

2,398

14,353

16,751

(8,006
)
1990
9/28/1998
14280 Park Meadow Drive (O)
Chantilly, VA

3,731

15,953

3,039

3,731

18,992

22,723

(7,982
)
1999
9/29/2004
1460 Dorsey Road (L)
Hanover, MD

1,577

67


1,577

67

1,644


(7)
2/28/2006
14840 Conference Center Drive (O)
Chantilly, VA

1,572

8,175

3,433

1,572

11,608

13,180

(5,964
)
2000
7/25/2003
14850 Conference Center Drive (O)
Chantilly, VA

1,615

8,358

3,108

1,615

11,466

13,081

(6,416
)
2000
7/25/2003
14900 Conference Center Drive (O)
Chantilly, VA

3,436

14,402

7,817

3,436

22,219

25,655

(10,959
)
1999
7/25/2003
1501 South Clinton Street (O)
Baltimore, MD

27,964

51,990

15,417

27,964

67,407

95,371

(22,475
)
2006
10/27/2009
15049 Conference Center Drive (O)
Chantilly, VA

4,415

20,365

15,729

4,415

36,094

40,509

(13,957
)
1997
8/14/2002
15059 Conference Center Drive (O)
Chantilly, VA

5,753

13,615

3,979

5,753

17,594

23,347

(8,680
)
2000
8/14/2002
1550 West Nursery Road (O)
Linthicum, MD

14,071

16,930


14,071

16,930

31,001

(5,390
)
2009
10/28/2009
1560 West Nursery Road (O)
Linthicum, MD

1,441

113


1,441

113

1,554

(13
)
2014
10/28/2009
1610 West Nursery Road (O)
Linthicum, MD

259

246


259

246

505

(11
)
2016
4/30/1998
1616 West Nursery Road (O)
Linthicum, MD

393

3,323


393

3,323

3,716

(98
)
2017
4/30/1998
1622 West Nursery Road (O)
Linthicum, MD

393

2,542


393

2,542

2,935

(116
)
2016
4/30/1998
 
 
 
Initial Cost
 
Gross Amounts Carried At Close of Period
 
 
 
Property (Type) (1)
Location
Encumbrances (2)
Land
Building and Land Improvements
Costs Capitalized Subsequent to Acquisition
Land
Building and Land Improvements
Total (3)(4)
Accumulated Depreciation (5)
Year Built or Renovated
Date Acquired (6)
16442 Commerce Drive (O)
Dahlgren, VA

613

2,582

894

613

3,476

4,089

(1,635
)
2002
12/21/2004
16480 Commerce Drive (O)
Dahlgren, VA

1,856

7,154

2,170

1,856

9,324

11,180

(3,624
)
2000
12/28/2004
16501 Commerce Drive (O)
Dahlgren, VA

522

2,090

976

522

3,066

3,588

(1,112
)
2002
12/21/2004
16539 Commerce Drive (O)
Dahlgren, VA

688

2,860

2,188

688

5,048

5,736

(2,517
)
1990
12/21/2004
16541 Commerce Drive (O)
Dahlgren, VA

773

3,094

1,794

773

4,888

5,661

(2,197
)
1996
12/21/2004
16543 Commerce Drive (O)
Dahlgren, VA

436

1,742

716

436

2,458

2,894

(972
)
2002
12/21/2004
1751 Pinnacle Drive (O)
McLean, VA

10,486

42,339

29,880

10,486

72,219

82,705

(32,435
)
1989/1995
9/23/2004
1753 Pinnacle Drive (O)
McLean, VA

8,275

34,353

20,778

8,275

55,131

63,406

(20,770
)
1976/2004
9/23/2004
206 Research Boulevard (O)
Aberdeen, MD








2012
9/14/2007
209 Research Boulevard (O)
Aberdeen, MD

134

1,711

265

134

1,976

2,110

(381
)
2010
9/14/2007
210 Research Boulevard (O)
Aberdeen, MD

113

1,402

204

113

1,606

1,719

(271
)
2010
9/14/2007
2100 L Street (O)
Washington, DC
13,577

56,351

19,446


56,351

19,446

75,797


(8)
8/11/2015
2100 Rideout Road (O)
Huntsville, AL


5,492

2,881


8,373

8,373

(866
)
2016
3/23/2010
22289 Exploration Drive (O)
Lexington Park, MD

1,422

5,594

1,867

1,422

7,461

8,883

(3,598
)
2000
3/24/2004
22299 Exploration Drive (O)
Lexington Park, MD

1,362

5,685

2,550

1,362

8,235

9,597

(4,040
)
1998
3/24/2004
22300 Exploration Drive (O)
Lexington Park, MD

1,094

4,929

2,522

1,094

7,451

8,545

(2,658
)
1997
11/9/2004
22309 Exploration Drive (O)
Lexington Park, MD

2,243

10,419

7,983

2,243

18,402

20,645

(6,799
)
1984/1997
3/24/2004
23535 Cottonwood Parkway (O)
California, MD

692

3,051

571

692

3,622

4,314

(1,695
)
1984
3/24/2004
250 W Pratt St (O)
Baltimore, MD

8,057

34,588

10,557

8,057

45,145

53,202

(10,084
)
1985
3/19/2015
2500 Riva Road (O)
Annapolis, MD

2,791

12,193

1

2,791

12,194

14,985

(6,467
)
2000
3/4/2003
2600 Park Tower Drive (O)
Vienna, VA

20,304

34,443

711

20,304

35,154

55,458

(4,939
)
1999
4/15/2015
2691 Technology Drive (O)
Annapolis Junction, MD

2,098

17,334

5,557

2,098

22,891

24,989

(10,541
)
2005
5/26/2000
2701 Technology Drive (O)
Annapolis Junction, MD

1,737

15,266

5,034

1,737

20,300

22,037

(10,559
)
2001
5/26/2000
2711 Technology Drive (O)
Annapolis Junction, MD

2,251

21,611

2,282

2,251

23,893

26,144

(12,299
)
2002
11/13/2000
2720 Technology Drive (O)
Annapolis Junction, MD

3,863

29,272

1,218

3,863

30,490

34,353

(11,349
)
2004
1/31/2002
2721 Technology Drive (O)
Annapolis Junction, MD

4,611

14,597

2,801

4,611

17,398

22,009

(8,280
)
2000
10/21/1999
2730 Hercules Road (O)
Annapolis Junction, MD

8,737

31,612

8,697

8,737

40,309

49,046

(20,174
)
1990
9/28/1998
30 Light Street (O)
Baltimore, MD
4,078


12,101

867


12,968

12,968

(1,113
)
2009
8/7/2015
300 Sentinel Drive (O)
Annapolis Junction, MD

1,517

59,165

1,201

1,517

60,366

61,883

(13,166
)
2009
11/14/2003
302 Sentinel Drive (O)
Annapolis Junction, MD

2,648

29,687

777

2,648

30,464

33,112

(8,381
)
2007
11/14/2003
304 Sentinel Drive (O)
Annapolis Junction, MD

3,411

24,917

1,814

3,411

26,731

30,142

(8,441
)
2005
11/14/2003
306 Sentinel Drive (O)
Annapolis Junction, MD

3,260

22,592

1,239

3,260

23,831

27,091

(7,357
)
2006
11/14/2003
308 Sentinel Drive (O)
Annapolis Junction, MD

1,422

26,208

2,330

1,422

28,538

29,960

(5,245
)
2010
11/14/2003
310 Sentinel Way (O)
Annapolis Junction, MD

2,372

39,990


2,372

39,990

42,362

(2,956
)
2016
11/14/2003
310 The Bridge Street (O)
Huntsville, AL

261

26,531

4,088

261

30,619

30,880

(8,677
)
2009
8/9/2011
312 Sentinel Way (O)
Annapolis Junction, MD

3,138

27,797


3,138

27,797

30,935

(2,999
)
2014
11/14/2003
314 Sentinel Way (O)
Annapolis Junction, MD

1,254

7,741


1,254

7,741

8,995

(781
)
2008
11/14/2003
316 Sentinel Way (O)
Annapolis Junction, MD

2,748

38,156

145

2,748

38,301

41,049

(6,475
)
2011
11/14/2003
318 Sentinel Way (O)
Annapolis Junction, MD

2,185

28,426

560

2,185

28,986

31,171

(9,182
)
2005
11/14/2003
 
 
 
Initial Cost
 
Gross Amounts Carried At Close of Period
 
 
 
Property (Type) (1)
Location
Encumbrances (2)
Land
Building and Land Improvements
Costs Capitalized Subsequent to Acquisition
Land
Building and Land Improvements
Total (3)(4)
Accumulated Depreciation (5)
Year Built or Renovated
Date Acquired (6)
320 Sentinel Way (O)
Annapolis Junction, MD

2,067

21,623

65

2,067

21,688

23,755

(5,935
)
2007
11/14/2003
322 Sentinel Way (O)
Annapolis Junction, MD

2,605

22,827

1,900

2,605

24,727

27,332

(7,047
)
2006
11/14/2003
324 Sentinel Way (O)
Annapolis Junction, MD

1,656

23,018


1,656

23,018

24,674

(4,805
)
2010
6/29/2006
4000 Market Street (O)
Huntsville, AL


6,820



6,820

6,820

(7
)
2018 (8)
3/23/2010
4100 Market Street (O)
Huntsville, AL


4,612



4,612

4,612


(8)
3/23/2010
410 National Business Parkway (O)
Annapolis Junction, MD

1,831

23,257

119

1,831

23,376

25,207

(3,497
)
2012
6/29/2006
420 National Business Parkway (O)
Annapolis Junction, MD

2,370

27,751

108

2,370

27,859

30,229

(3,340
)
2013
6/29/2006
430 National Business Parkway (O)
Annapolis Junction, MD

1,852

21,563

127

1,852

21,690

23,542

(3,680
)
2011
6/29/2006
44408 Pecan Court (O)
California, MD

817

1,464

1,691

817

3,155

3,972

(1,079
)
1986
3/24/2004
44414 Pecan Court (O)
California, MD

405

1,619

1,065

405

2,684

3,089

(1,137
)
1986
3/24/2004
44417 Pecan Court (O)
California, MD

434

3,794

208

434

4,002

4,436

(1,624
)
1989/2015
3/24/2004
44420 Pecan Court (O)
California, MD

344

880

270

344

1,150

1,494

(423
)
1989
11/9/2004
44425 Pecan Court (O)
California, MD

1,309

3,506

2,123

1,309

5,629

6,938

(2,750
)
1997
5/5/2004
45310 Abell House Lane (O)
California, MD

2,272

13,808

471

2,272

14,279

16,551

(2,455
)
2011
8/30/2010
46579 Expedition Drive (O)
Lexington Park, MD

1,406

5,796

1,831

1,406

7,627

9,033

(3,664
)
2002
3/24/2004
46591 Expedition Drive (O)
Lexington Park, MD

1,200

7,199

1,977

1,200

9,176

10,376

(3,052
)
2005
3/24/2004
4851 Stonecroft Boulevard (O)
Chantilly, VA

1,878

11,558

34

1,878

11,592

13,470

(4,116
)
2004
8/14/2002
540 National Business Parkway (O)
Annapolis Junction, MD

2,035

29,608


2,035

29,608

31,643

(934
)
2017
6/29/2006
5520 Research Park Drive (O)
Catonsville, MD


20,072

1,327


21,399

21,399

(4,886
)
2009
4/4/2006
5522 Research Park Drive (O)
Catonsville, MD


4,550

210


4,760

4,760

(1,313
)
2007
3/8/2006
5801 University Research Court (O)
College Park, MD


15,936



15,936

15,936

(240
)
2018 (8)
11/9/2016
5825 University Research Court (O)
College Park, MD
20,875


22,771

783


23,554

23,554

(5,680
)
2008
1/29/2008
5850 University Research Court (O)
College Park, MD
22,085


31,906

405


32,311

32,311

(7,165
)
2008
1/29/2008
6700 Alexander Bell Drive (O)
Columbia, MD

1,755

7,019

7,509

1,755

14,528

16,283

(7,484
)
1988
5/14/2001
6708 Alexander Bell Drive (O)
Columbia, MD

897

12,631

1,622

897

14,253

15,150

(4,111
)
1988/2016
5/14/2001
6711 Columbia Gateway Drive (O)
Columbia, MD

2,683

23,239

1,550

2,683

24,789

27,472

(7,598
)
2006-2007
9/28/2000
6716 Alexander Bell Drive (O)
Columbia, MD

1,242

4,969

4,285

1,242

9,254

10,496

(5,506
)
1990
12/31/1998
6721 Columbia Gateway Drive (O)
Columbia, MD

1,753

34,090

122

1,753

34,212

35,965

(8,373
)
2009
9/28/2000
6724 Alexander Bell Drive (O)
Columbia, MD

449

5,039

1,535

449

6,574

7,023

(2,946
)
2001
5/14/2001
6731 Columbia Gateway Drive (O)
Columbia, MD

2,807

19,098

4,921

2,807

24,019

26,826

(11,156
)
2002
3/29/2000
6740 Alexander Bell Drive (O)
Columbia, MD

1,424

5,696

3,441

1,424

9,137

10,561

(5,875
)
1992
12/31/1998
6741 Columbia Gateway Drive (O)
Columbia, MD

675

1,711

154

675

1,865

2,540

(521
)
2008
9/28/2000
6750 Alexander Bell Drive (O)
Columbia, MD

1,263

12,461

4,981

1,263

17,442

18,705

(9,484
)
2001
12/31/1998
6760 Alexander Bell Drive (O)
Columbia, MD

890

3,561

3,830

890

7,391

8,281

(4,272
)
1991
12/31/1998
6940 Columbia Gateway Drive (O)
Columbia, MD

3,545

9,916

7,330

3,545

17,246

20,791

(9,035
)
1999
11/13/1998
6950 Columbia Gateway Drive (O)
Columbia, MD

3,596

15,738

3,220

3,596

18,958

22,554

(10,912
)
1998 (8)
10/22/1998
7000 Columbia Gateway Drive (O)
Columbia, MD

3,131

12,103

6,479

3,131

18,582

21,713

(7,126
)
1999
5/31/2002
7005 Columbia Gateway Drive (L)
Columbia, MD

3,036

747


3,036

747

3,783


(7)
6/26/2014
7015 Albert Einstein Drive (O)
Columbia, MD
412

2,058

6,093

3,319

2,058

9,412

11,470

(3,746
)
1999
12/1/2005
 
 
 
Initial Cost
 
Gross Amounts Carried At Close of Period
 
 
 
Property (Type) (1)
Location
Encumbrances (2)
Land
Building and Land Improvements
Costs Capitalized Subsequent to Acquisition
Land
Building and Land Improvements
Total (3)(4)
Accumulated Depreciation (5)
Year Built or Renovated
Date Acquired (6)
7061 Columbia Gateway Drive (O)
Columbia, MD

729

3,094

2,018

729

5,112

5,841

(2,747
)
2000
8/30/2001
7063 Columbia Gateway Drive (O)
Columbia, MD

902

3,684

3,416

902

7,100

8,002

(3,553
)
2000
8/30/2001
7065 Columbia Gateway Drive (O)
Columbia, MD

919

3,763

3,095

919

6,858

7,777

(4,070
)
2000
8/30/2001
7067 Columbia Gateway Drive (O)
Columbia, MD

1,829

11,823

4,480

1,829

16,303

18,132

(7,496
)
2001
8/30/2001
7125 Columbia Gateway Drive (O)
Columbia, MD

20,487

46,994

18,044

20,487

65,038

85,525

(23,141
)
1973/1999
6/29/2006
7130 Columbia Gateway Drive (O)
Columbia, MD

1,350

4,359

2,559

1,350

6,918

8,268

(3,396
)
1989
9/19/2005
7134 Columbia Gateway Drive (O)
Columbia, MD

704

4,700

353

704

5,053

5,757

(1,540
)
1990/2016
9/19/2005
7138 Columbia Gateway Drive (O)
Columbia, MD

1,104

3,518

2,843

1,104

6,361

7,465

(3,658
)
1990
9/19/2005
7142 Columbia Gateway Drive (O)
Columbia, MD

1,342

7,158

2,608

1,342

9,766

11,108

(3,137
)
1994/2018
9/19/2005
7150 Columbia Gateway Drive (O)
Columbia, MD

1,032

3,429

813

1,032

4,242

5,274

(1,557
)
1991
9/19/2005
7150 Riverwood Drive (O)
Columbia, MD

1,821

4,388

1,824

1,821

6,212

8,033

(2,570
)
2000
1/10/2007
7160 Riverwood Drive (O)
Columbia, MD

2,732

7,006

2,490

2,732

9,496

12,228

(4,050
)
2000
1/10/2007
7170 Riverwood Drive (O)
Columbia, MD

1,283

3,096

1,704

1,283

4,800

6,083

(2,026
)
2000
1/10/2007
7175 Riverwood Drive (O)
Columbia, MD

1,788

7,269


1,788

7,269

9,057

(934
)
1996/2013
7/27/2005
7200 Redstone Gateway (O)
Huntsville, AL
6,121


8,348

5


8,353

8,353

(963
)
2013
3/23/2010
7200 Riverwood Road (O)
Columbia, MD

4,089

22,630

4,538

4,089

27,168

31,257

(11,024
)
1986
10/13/1998
7205 Riverwood Drive (O)
Columbia, MD

1,367

21,419


1,367

21,419

22,786

(2,916
)
2013
7/27/2005
7272 Park Circle Drive (O)
Hanover, MD

1,479

6,300

4,578

1,479

10,878

12,357

(4,427
)
1991/1996
1/10/2007
7318 Parkway Drive (O)
Hanover, MD

972

3,888

1,250

972

5,138

6,110

(2,566
)
1984
4/16/1999
7400 Redstone Gateway (O)
Huntsville, AL
6,713


9,223



9,223

9,223

(813
)
2015
3/23/2010
7467 Ridge Road (O)
Hanover, MD

1,565

3,116

4,428

1,565

7,544

9,109

(2,699
)
1990
4/28/1999
7740 Milestone Parkway (O)
Hanover, MD
17,786

3,825

34,176

567

3,825

34,743

38,568

(7,395
)
2009
7/2/2007
7770 Backlick Road (O)
Springfield, VA

6,387

76,593

300

6,387

76,893

83,280

(11,016
)
2012
3/10/2010
7880 Milestone Parkway (O)
Hanover, MD

4,857

25,925

200

4,857

26,125

30,982

(2,023
)
2015
9/17/2013
8621 Robert Fulton Drive (O)
Columbia, MD

2,317

12,642

6,437

2,317

19,079

21,396

(4,777
)
2005-2006
6/10/2005
8661 Robert Fulton Drive (O)
Columbia, MD

1,510

3,764

2,453

1,510

6,217

7,727

(2,926
)
2002
12/30/2003
8671 Robert Fulton Drive (O)
Columbia, MD

1,718

4,280

4,233

1,718

8,513

10,231

(4,021
)
2002
12/30/2003
870 Elkridge Landing Road (O)
Linthicum, MD

2,003

9,442

9,301

2,003

18,743

20,746

(9,936
)
1981
8/3/2001
8800 Redstone Gateway (O)
Huntsville, AL


992



992

992


(8)
3/23/2010
891 Elkridge Landing Road (O)
Linthicum, MD

1,165

4,772

3,450

1,165

8,222

9,387

(4,582
)
1984
7/2/2001
901 Elkridge Landing Road (O)
Linthicum, MD

1,156

4,437

3,383

1,156

7,820

8,976

(3,955
)
1984
7/2/2001
911 Elkridge Landing Road (O)
Linthicum, MD

1,215

4,861

2,901

1,215

7,762

8,977

(4,170
)
1985
4/30/1998
938 Elkridge Landing Road (O)
Linthicum, MD

922

4,748

1,446

922

6,194

7,116

(2,828
)
1984
7/2/2001
939 Elkridge Landing Road (O)
Linthicum, MD

939

3,756

4,438

939

8,194

9,133

(4,642
)
1983
4/30/1998
9651 Hornbaker Road (D)
Manassas, VA

6,050

251,367

4,689

6,050

256,056

262,106

(50,191
)
2010
9/14/2010
Arundel Preserve (L)
Hanover, MD

13,401

9,583


13,401

9,583

22,984


(7)
7/2/2007
Bethlehem Tech. Park - DC 18 (O)
Manassas, VA

3,599

26,636


3,599

26,636

30,235

(964
)
2017
6/17/2016
Bethlehem Tech. Park - DC 19 (O)
Manassas, VA

3,708

16,606


3,708

16,606

20,314

(865
)
2016
6/9/2016
Bethlehem Tech. Park - DC 20 (O)
Manassas, VA

3,599

24,062


3,599

24,062

27,661

(965
)
2017
6/9/2016
 
 
 
Initial Cost
 
Gross Amounts Carried At Close of Period
 
 
 
Property (Type) (1)
Location
Encumbrances (2)
Land
Building and Land Improvements
Costs Capitalized Subsequent to Acquisition
Land
Building and Land Improvements
Total (3)(4)
Accumulated Depreciation (5)
Year Built or Renovated
Date Acquired (6)
Bethlehem Tech. Park - DC 23 (O)
Manassas, VA


4,883



4,883

4,883


(8)
6/9/2016
BLC 1 (O)
Northern Virginia

12,034

17,917


12,034

17,917

29,951

(245
)
2018
12/28/2017
BLC 2 (O)
Northern Virginia

12,034

17,659


12,034

17,659

29,693

(210
)
2018
12/28/2017
Canton Crossing Land (L)
Baltimore, MD

17,285

8,179


17,285

8,179

25,464


(7)
10/27/2009
Canton Crossing Util Distr Ctr (O)
Baltimore, MD

6,100

10,450

1,192

6,100

11,642

17,742

(5,053
)
2006
10/27/2009
Columbia Gateway - Southridge (L)
Columbia, MD

6,387

3,722


6,387

3,722

10,109


(7)
9/20/2004
Dahlgren Technology Center (L)
Dahlgren, VA

978

178


978

178

1,156


(7)
3/16/2005
Expedition VII (L)
Lexington Park, MD

705

730


705

730

1,435


(7)
3/24/2004
IN 1 (O)
Northern Virginia

1,815

11,532


1,815

11,532

13,347


(8)
8/31/2016
IN 2 (O)
Northern Virginia

2,627

4,655


2,627

4,655

7,282


(8)
8/31/2016
M Square Research Park (L)
College Park, MD


3,202



3,202

3,202


(7)
1/29/2008
MP 1 (O)
Northern Virginia

9,426

15,865


9,426

15,865

25,291


(8)
11/20/2017
MP 2 (O)
Northern Virginia

9,426

25,191


9,426

25,191

34,617


2018
11/20/2017
MR Land (L)
Northern Virginia

9,038

55


9,038

55

9,093


(7)
11/8/2018
National Business Park North (L)
Annapolis Junction, MD

28,060

47,371


28,060

47,371

75,431


(7)
6/29/2006
North Gate Business Park (L)
Aberdeen, MD

1,755



1,755


1,755


(7)
9/14/2007
Northwest Crossroads (L)
San Antonio, TX

7,430

847


7,430

847

8,277


(7)
1/20/2006
NOVA Office A (O) (9)
Chantilly, VA

2,096

46,840


2,096

46,840

48,936

(4,577
)
2015
7/31/2002
NOVA Office B (O) (9)
Chantilly, VA

739

33,881


739

33,881

34,620

(1,817
)
2016
7/31/2002
NOVA Office D (O) (9)
Chantilly, VA

6,587

40,525


6,587

40,525

47,112

(1,417
)
2017
7/31/2002
Old Annapolis Road (O)
Columbia, MD

1,637

5,500

6,531

1,637

12,031

13,668

(3,898
)
1974/1985
12/14/2000
Paragon Park - DC 21 (O)
Sterling, VA

7,828

19,999


7,828

19,999

27,827

(560
)
2017
5/8/2017
Paragon Park - DC 22 (O)
Sterling, VA

7,828

18,755


7,828

18,755

26,583

(515
)
2017
5/8/2017
Patriot Point - DC 15 (O)
Ashburn, VA

12,156

17,175


12,156

17,175

29,331

(1,180
)
2016
10/15/2015
Patriot Point - DC 16 (O)
Ashburn, VA

12,156

17,043


12,156

17,043

29,199

(1,135
)
2016
10/15/2015
Patriot Point - DC 17 (O)
Ashburn, VA

6,078

16,408


6,078

16,408

22,486

(930
)
2016
10/15/2015
Patriot Ridge (L)
Springfield, VA

18,517

14,505


18,517

14,505

33,022


(7)
3/10/2010
Project EX (O) (10)
Confidential-USA

8,958

5,744


8,958

5,744

14,702


2018
7/16/2008
Redstone Gateway (L)
Huntsville, AL


21,807



21,807

21,807


(7)
3/23/2010
Route 15/Biggs Ford Road (L)
Frederick, MD

1,129



1,129


1,129


(7)
8/28/2008
Sentry Gateway (L)
San Antonio, TX

4,052

1,833


4,052

1,833

5,885


(7)
3/30/2005
Sentry Gateway - T (O)
San Antonio, TX

14,020

38,804

13

14,020

38,817

52,837

(11,532
)
1982/2008
3/30/2005
Sentry Gateway - V (O)
San Antonio, TX


1,066



1,066

1,066

(268
)
2007
3/30/2005
Sentry Gateway - W (O)
San Antonio, TX


1,884

71


1,955

1,955

(444
)
2009
3/30/2005
Sentry Gateway - X (O)
San Antonio, TX

1,964

21,178


1,964

21,178

23,142

(4,316
)
2010
1/20/2006
Sentry Gateway - Y (O)
San Antonio, TX

1,964

21,298


1,964

21,298

23,262

(4,342
)
2010
1/20/2006
Sentry Gateway - Z (O)
San Antonio, TX

1,964

30,573


1,964

30,573

32,537

(2,908
)
2015
6/14/2005
Westfields - Park Center (L)
Chantilly, VA

16,418

12,097


16,418

12,097

28,515


(7)
7/18/2002
Westfields Corporate Center (L)
Chantilly, VA

7,141

1,576


7,141

1,576

8,717


(7)
7/31/2002
 
 
 
Initial Cost
 
Gross Amounts Carried At Close of Period
 
 
 
Property (Type) (1)
Location
Encumbrances (2)
Land
Building and Land Improvements
Costs Capitalized Subsequent to Acquisition
Land
Building and Land Improvements
Total (3)(4)
Accumulated Depreciation (5)
Year Built or Renovated
Date Acquired (6)
Other Developments, including intercompany eliminations (V)
Various

8

121

373

8

494

502

(77
)
Various
Various
 
 
$
174,043

$
711,034

$
3,002,155

$
435,340

$
711,034

$
3,437,495

$
4,148,529

$
(897,903
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
A legend for the Property Type follows: (O) = Office or Data Center Shell Property; (L) = Land held or pre-construction; (D) = Wholesale Data Center; and (V) = Various.
(2)
Excludes our Revolving Credit Facility of $213.0 million, term loan facilities of $248.3 million, unsecured senior notes of $1.2 billion, unsecured notes payable of $1.2 million, and deferred financing costs, net of premiums, on the remaining loans of $3.6 million.
(3)
The aggregate cost of these assets for Federal income tax purposes was approximately $3.5 billion as of December 31, 2018.
(4)
As discussed in Note 5 to our Consolidated Financial Statements, we recognized an impairment loss of $2.4 million in connection with an operating property still owned as of December 31, 2018.
(5)
The estimated lives over which depreciation is recognized follow: Building and land improvements: 10-40 years; and tenant improvements: related lease terms.
(6)
The acquisition date of multi-parcel properties reflects the date of the earliest parcel acquisition.
(7)
Held as of December 31, 2018.
(8)
Under construction or redevelopment as of December 31, 2018.
(9)
The carrying amounts of these properties exclude allocated costs of the garage being constructed to support the properties.
(10)
This property represents land under a long-term contract.
The following table summarizes our changes in cost of properties for the years ended December 31, 2018, 2017 and 2016 (in thousands):
 
 
 
 
 
 
2018
 
2017
 
2016
 
Beginning balance
 
 
$
3,980,813

 
$
3,874,715

 
$
4,158,616

 
Improvements and other additions
 
 
224,524

 
259,548

 
251,960

 
Sales
 
 
(53,547
)
 
(138,216
)
 
(268,038
)
 
Impairments
 
 
(2,493
)
 
(15,116
)
 
(143,502
)
 
Other dispositions
 
 
(768
)
 
(118
)
 
(124,321
)
 
Ending balance
 
 
$
4,148,529

 
$
3,980,813

 
$
3,874,715

 
 
 
 
 
 
 
 
 
 
 
The following table summarizes our changes in accumulated depreciation for the same time periods (in thousands):
 
 
 
 
 
 
2018
 
2017
 
2016
 
Beginning balance
 
 
$
801,038

 
$
715,951

 
$
718,680

 
Depreciation expense
 
 
112,610

 
107,772

 
105,763

 
Sales
 
 
(14,845
)
 
(22,567
)
 
(56,607
)
 
Impairments
 
 
(132
)
 

 
(42,161
)
 
Other dispositions
 
 
(768
)
 
(118
)
 
(9,724
)
 
Ending balance
 
 
$
897,903

 
$
801,038

 
$
715,951