Annual report pursuant to Section 13 and 15(d)

Schedule III-Real Estate and Accumulated Depreciation

v2.4.0.6
Schedule III-Real Estate and Accumulated Depreciation
12 Months Ended
Dec. 31, 2012
Real Estate and Accumulated Depreciation Disclosure [Abstract]  
Schedule III-Real Estate and Accumulated Depreciation
Corporate Office Properties Trust
Schedule III—Real Estate and Accumulated Depreciation
December 31, 2012
(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)
1000 Redstone Gateway (O)
Huntsville, AL
$
11,078

$

$
18,582

$

$

$
18,582

$
18,582

$

(7)
3/23/2010
1055 North Newport Road (O)(10)
Colorado Springs, CO

972

5,708


972

5,708

6,680

(178
)
2007-2008
5/19/2006
10807 New Allegiance Drive (O)(10)
Colorado Springs, CO

1,840

15,439

122

1,840

15,561

17,401

(298
)
2009
9/28/2005
1099 Winterson Road (O)
Linthicum, MD
12,012

1,323

5,293

2,499

1,323

7,792

9,115

(3,348
)
1988
4/30/1998
1100 Redstone Gateway (O)
Huntsville, AL


924



924

924


(7)
3/23/2010
114 National Business Parkway (O)
Annapolis Junction, MD

364

3,109

21

364

3,130

3,494

(878
)
2002
6/30/2000
11751 Meadowville Lane (O)
Richmond, VA

1,305

52,098

112

1,305

52,210

53,515

(7,278
)
2007
9/15/2006
1190 Winterson Road (O)
Linthicum, MD
11,291

1,335

5,340

4,025

1,335

9,365

10,700

(5,111
)
1987
4/30/1998
1199 Winterson Road (O)
Linthicum, MD
18,578

1,599

6,395

3,266

1,599

9,661

11,260

(4,665
)
1988
4/30/1998
1200 Redstone Gateway (O)
Huntsville, AL


2,297



2,297

2,297


(7)
3/23/2010
1201 M Street (O)
Washington, DC
36,659


49,785

1,959


51,744

51,744

(3,939
)
2001
9/28/2010
1201 Winterson Road (O)
Linthicum, MD

1,288

5,154

460

1,288

5,614

6,902

(2,068
)
1985
4/30/1998
1220 12th Street, SE (O)
Washington, DC
30,153


42,464

733


43,197

43,197

(3,914
)
2003
9/28/2010
1243 Winterson Road (L)
Linthicum, MD

630



630


630


(8)
12/19/2001
12515 Academy Ridge View (O)(10)
Colorado Springs, CO

2,612

6,087


2,612

6,087

8,699

(441
)
2006
6/26/2009
1302 Concourse Drive (O)
Linthicum, MD

2,078

8,313

2,991

2,078

11,304

13,382

(4,626
)
1996
11/18/1999
1304 Concourse Drive (O)
Linthicum, MD

1,999

12,934

1,202

1,999

14,136

16,135

(4,657
)
2002
11/18/1999
1306 Concourse Drive (O)
Linthicum, MD

2,796

11,186

2,837

2,796

14,023

16,819

(4,998
)
1990
11/18/1999
131 National Business Parkway (O)
Annapolis Junction, MD
6,922

1,906

7,623

2,657

1,906

10,280

12,186

(3,876
)
1990
9/28/1998
132 National Business Parkway (O)
Annapolis Junction, MD

2,917

12,259

2,895

2,917

15,154

18,071

(6,563
)
2000
5/28/1999
13200 Woodland Park Road (O)
Herndon, VA

10,428

41,711

13,831

10,428

55,542

65,970

(19,432
)
2002
6/2/2003
133 National Business Parkway (O)
Annapolis Junction, MD
9,262

2,517

10,068

4,821

2,517

14,889

17,406

(6,167
)
1997
9/28/1998
1331 Ashton Road (O)
Hanover, MD

587

2,347

677

587

3,024

3,611

(939
)
1989
4/28/1999
1334 Ashton Road (O)
Hanover, MD

736

1,488

2,301

736

3,789

4,525

(1,468
)
1989
4/28/1999
134 National Business Parkway (O)
Annapolis Junction, MD
19,200

3,684

7,517

2,230

3,684

9,747

13,431

(4,138
)
1999
11/13/1998
1340 Ashton Road (O)
Hanover, MD

905

3,620

1,067

905

4,687

5,592

(1,874
)
1989
4/28/1999
1341 Ashton Road (O)
Hanover, MD

306

1,223

588

306

1,811

2,117

(727
)
1989
4/28/1999
1343 Ashton Road (O)
Hanover, MD

193

774

405

193

1,179

1,372

(435
)
1989
4/28/1999
13450 Sunrise Valley Road (O)
Herndon, VA

1,386

5,576

2,722

1,386

8,298

9,684

(2,853
)
1998
7/25/2003
13454 Sunrise Valley Road (O)
Herndon, VA

2,899

11,986

3,909

2,899

15,895

18,794

(4,605
)
1998
7/25/2003
135 National Business Parkway (O)
Annapolis Junction, MD
9,925

2,484

9,750

2,882

2,484

12,632

15,116

(4,932
)
1998
12/30/1998
1362 Mellon Road (O)
Hanover, MD

1,706

8,412

18

1,706

8,430

10,136

(841
)
2006
2/10/2006
13857 McLearen Road (O)
Herndon, VA

3,507

30,177

1,724

3,507

31,901

35,408

(973
)
2007
7/11/2012
140 National Business Parkway (O)
Annapolis Junction, MD

3,407

24,167

643

3,407

24,810

28,217

(5,748
)
2003
12/31/2003
 
 
 
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)
141 National Business Parkway (O)
Annapolis Junction, MD
9,725

2,398

9,590

2,389

2,398

11,979

14,377

(4,354
)
1990
9/28/1998
14280 Park Meadow Drive (O)
Chantilly, VA

3,731

15,953

1,009

3,731

16,962

20,693

(4,529
)
1999
9/29/2004
1460 Dorsey Road (L)
Hanover, MD

1,800



1,800


1,800


(8)
2/28/2006
14840 Conference Center Drive (O)
Chantilly, VA

1,572

8,175

508

1,572

8,683

10,255

(3,385
)
2000
7/25/2003
14850 Conference Center Drive (O)
Chantilly, VA

1,615

8,358

539

1,615

8,897

10,512

(3,434
)
2000
7/25/2003
14900 Conference Center Drive (O)
Chantilly, VA

3,436

14,402

3,560

3,436

17,962

21,398

(5,796
)
1999
7/25/2003
15000 Conference Center Drive (O)
Chantilly, VA
54,000

5,193

47,045

18,198

5,193

65,243

70,436

(20,752
)
1989
11/30/2001
1501 South Clinton Street (O)
Baltimore, MD

27,964

50,415

5,222

27,964

55,637

83,601

(5,696
)
2006
10/27/2009
15010 Conference Center Drive (O)
Chantilly, VA
96,000

3,500

41,921

344

3,500

42,265

45,765

(6,503
)
2006
11/30/2001
15049 Conference Center Drive (O)
Chantilly, VA

4,415

20,365

726

4,415

21,091

25,506

(7,276
)
1997
8/14/2002
15059 Conference Center Drive (O)
Chantilly, VA

5,753

13,615

1,423

5,753

15,038

20,791

(4,891
)
2000
8/14/2002
1550 West Nursery Road (O)
Linthicum, MD

14,071

16,930


14,071

16,930

31,001

(1,862
)
2009
10/28/2009
1550 Westbranch Drive (O)
McLean, VA

5,595

26,212

116

5,595

26,328

31,923

(2,354
)
2002
6/28/2010
1560A Cable Ranch Road (O)
San Antonio, TX

1,097

3,770

28

1,097

3,798

4,895

(667
)
1985/2007
6/19/2008
1560B Cable Ranch Road (O)
San Antonio, TX

2,299

6,545

11

2,299

6,556

8,855

(1,120
)
1985/2006
6/19/2008
16442 Commerce Drive (O)
Dahlgren, VA
2,305

613

2,582

555

613

3,137

3,750

(761
)
2002
12/21/2004
16480 Commerce Drive (O)
Dahlgren, VA

1,856

7,425

164

1,856

7,589

9,445

(1,649
)
2000
12/28/2004
16501 Commerce Drive (O)
Dahlgren, VA
1,885

522

2,090

185

522

2,275

2,797

(594
)
2002
12/21/2004
16539 Commerce Drive (O)
Dahlgren, VA

688

2,860

1,443

688

4,303

4,991

(1,224
)
1990
12/21/2004
16541 Commerce Drive (O)
Dahlgren, VA

773

3,094

1,321

773

4,415

5,188

(1,149
)
1996
12/21/2004
16543 Commerce Drive (O)
Dahlgren, VA
1,571

436

1,742

12

436

1,754

2,190

(349
)
2002
12/21/2004
1670 North Newport Road (O)(10)
Colorado Springs, CO
4,383

853

5,188

763

853

5,951

6,804

(776
)
1986/1987
9/30/2005
1751 Pinnacle Drive (O)
McLean, VA
30,283

10,486

42,339

12,461

10,486

54,800

65,286

(16,190
)
1989/1995
9/23/2004
1753 Pinnacle Drive (O)
McLean, VA
24,438

8,275

34,353

8,736

8,275

43,089

51,364

(10,657
)
1976/2004
9/23/2004
1915 Aerotech Drive (O)
Colorado Springs, CO
3,394

556

3,094

539

556

3,633

4,189

(1,037
)
1985
6/8/2006
1925 Aerotech Drive (O)
Colorado Springs, CO
3,717

556

3,067

343

556

3,410

3,966

(759
)
1985
6/8/2006
201 Technology Drive (O)
Lebanon, VA

726

31,091

60

726

31,151

31,877

(4,021
)
2007
10/5/2007
206 Research Boulevard (O)
Aberdeen, MD

1,813

17,334


1,813

17,334

19,147

(107
)
2012
9/14/2007
209 Research Boulevard (O)
Aberdeen, MD

1,045

16,063


1,045

16,063

17,108

(859
)
2010
9/14/2007
210 Research Boulevard (O)
Aberdeen, MD

1,065

13,144


1,065

13,144

14,209

(519
)
2010
9/14/2007
22289 Exploration Drive (O)
Lexington Park, MD

1,422

5,719

1,005

1,422

6,724

8,146

(1,951
)
2000
3/24/2004
22299 Exploration Drive (O)
Lexington Park, MD

1,362

5,791

682

1,362

6,473

7,835

(2,026
)
1998
3/24/2004
22300 Exploration Drive (O)
Lexington Park, MD

1,094

5,038

169

1,094

5,207

6,301

(1,569
)
1997
11/9/2004
22309 Exploration Drive (O)
Lexington Park, MD

2,243

10,419

227

2,243

10,646

12,889

(3,459
)
1984/1997
3/24/2004
23535 Cottonwood Parkway (O)
California, MD

692

3,051

223

692

3,274

3,966

(789
)
1984
3/24/2004
2500 Riva Road (O)
Annapolis, MD

2,791

12,145

1

2,791

12,146

14,937

(3,384
)
2000
3/4/2003
2691 Technology Drive (O)
Annapolis Junction, MD
24,000

2,098

17,334

5,096

2,098

22,430

24,528

(5,167
)
2005
5/26/2000
2701 Technology Drive (O)
Annapolis Junction, MD
13,794

1,737

15,266

306

1,737

15,572

17,309

(5,403
)
2001
5/26/2000
2711 Technology Drive (O)
Annapolis Junction, MD
19,359

2,251

21,611

1,075

2,251

22,686

24,937

(7,961
)
2002
11/13/2000
 
 
 
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)
2720 Technology Drive (O)
Annapolis Junction, MD
24,068

3,863

29,272

88

3,863

29,360

33,223

(6,102
)
2004
1/31/2002
2721 Technology Drive (O)
Annapolis Junction, MD

4,611

14,597

1,497

4,611

16,094

20,705

(4,841
)
2000
10/21/1999
2730 Hercules Road (O)
Annapolis Junction, MD
32,734

8,737

31,612

5,277

8,737

36,889

45,626

(11,825
)
1990
9/28/1998
2900 Towerview Road (O)
Herndon, VA

3,207

16,344

5,607

3,207

21,951

25,158

(3,785
)
1982/2008
12/20/2005
300 Sentinel Drive (O)
Annapolis Junction, MD

1,517

58,642

119

1,517

58,761

60,278

(4,026
)
2009
11/14/2003
302 Sentinel Drive (O)
Annapolis Junction, MD
22,693

2,648

29,398

380

2,648

29,778

32,426

(3,642
)
2007
11/14/2003
304 Sentinel Drive (O)
Annapolis Junction, MD
37,280

3,411

24,917

132

3,411

25,049

28,460

(4,361
)
2005
11/14/2003
306 Sentinel Drive (O)
Annapolis Junction, MD
20,973

3,260

22,592

110

3,260

22,702

25,962

(3,541
)
2006
11/14/2003
308 Sentinel Drive (O)
Annapolis Junction, MD

1,422

26,197


1,422

26,197

27,619

(1,085
)
2010
11/14/2003
310 The Bridge Street (O)
Huntsville, AL

261

26,576

26

261

26,602

26,863

(2,028
)
2009
8/4/2011
312 Sentinel Way (O)
Annapolis Junction, MD

3,138

9,128


3,138

9,128

12,266


(7)
11/14/2003
3120 Fairview Park Drive (O)
Falls Church, VA

6,863

35,606

5,406

6,863

41,012

47,875

(2,247
)
2008
11/23/2010
314 Sentinel Way (O)
Annapolis Junction, MD

1,254

1,325


1,254

1,325

2,579

(149
)
2008
11/14/2003
316 Sentinel Way (O)
Annapolis Junction, MD

2,748

31,861

131

2,748

31,992

34,740

(830
)
2011
11/14/2003
318 Sentinel Way (O)
Annapolis Junction, MD
22,240

2,185

28,426


2,185

28,426

30,611

(4,849
)
2005
11/14/2003
320 Sentinel Way (O)
Annapolis Junction, MD

2,067

21,623


2,067

21,623

23,690

(2,688
)
2007
11/14/2003
322 Sentinel Way (O)
Annapolis Junction, MD
21,912

2,605

22,827


2,605

22,827

25,432

(3,431
)
2006
11/14/2003
324 Sentinel Way (O)
Annapolis Junction, MD

1,656

23,005


1,656

23,005

24,661

(1,352
)
2010
6/29/2006
3535 Northrop Grumman Pt. (O)(10)
Colorado Springs, CO
17,982


18,388

121


18,509

18,509

(1,555
)
2008
6/10/2008
375 West Padonia Road (O)
Timonium, MD

2,483

10,415

4,821

2,483

15,236

17,719

(5,242
)
1986
12/21/1999
410 National Business Parkway (O)
Annapolis Junction, MD

1,831

16,569


1,831

16,569

18,400

(34
)
2012
6/29/2003
420 National Business Parkway (O)
Annapolis Junction, MD

2,370

15,673


2,370

15,673

18,043


(7)
6/29/2006
4230 Forbes Boulevard (O)(10)
Lanham, MD

511

4,346

192

511

4,538

5,049

(1,837
)
2003
12/24/2002
430 National Business Parkway (O)
Annapolis Junction, MD

1,852

21,038


1,852

21,038

22,890

(449
)
2011
6/29/2006
44408 Pecan Court (O)
California, MD

817

1,583

118

817

1,701

2,518

(161
)
1986
3/24/2004
44414 Pecan Court (O)
California, MD

405

1,619

336

405

1,955

2,360

(475
)
1986
3/24/2004
44417 Pecan Court (O)
California, MD

434

1,939

88

434

2,027

2,461

(636
)
1989
3/24/2004
44420 Pecan Court (O)
California, MD

344

890

126

344

1,016

1,360

(90
)
1989
11/9/2004
44425 Pecan Court (O)
California, MD

1,309

3,506

1,217

1,309

4,723

6,032

(921
)
1997
5/5/2004
45310 Abell House Lane (O)
California, MD

2,272

13,794


2,272

13,794

16,066

(368
)
2011
8/30/2010
46579 Expedition Drive (O)
Lexington Park, MD

1,406

5,796

1,078

1,406

6,874

8,280

(2,147
)
2002
3/24/2004
46591 Expedition Drive (O)
Lexington Park, MD

1,200

7,199

656

1,200

7,855

9,055

(1,083
)
2005
3/24/2004
4851 Stonecroft Boulevard (O)
Chantilly, VA

1,878

11,558

21

1,878

11,579

13,457

(2,379
)
2004
8/14/2002
4940 Campbell Drive (O)
White Marsh, MD

1,379

3,858

987

1,379

4,845

6,224

(933
)
1990
1/9/2007
4969 Mercantile Road (O)
White Marsh, MD

1,308

4,456

62

1,308

4,518

5,826

(678
)
1983
1/9/2007
4979 Mercantile Road (O)
White Marsh, MD

1,299

4,686

84

1,299

4,770

6,069

(727
)
1985
1/9/2007
5020 Campbell Boulevard (O)
White Marsh, MD

1,014

3,136

781

1,014

3,917

4,931

(673
)
1986-1988
1/9/2007
5022 Campbell Boulevard (O)
White Marsh, MD

624

1,924

332

624

2,256

2,880

(496
)
1986-1988
1/9/2007
5024 Campbell Boulevard (O)
White Marsh, MD

767

2,420

250

767

2,670

3,437

(702
)
1986-1988
1/9/2007
 
 
 
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)
5026 Campbell Boulevard (O)
White Marsh, MD

700

2,138

45

700

2,183

2,883

(396
)
1986-1988
1/9/2007
525 Babcock Road (O)(10)
Colorado Springs, CO

355

397

79

355

476

831

(89
)
1967
7/12/2007
5325 Nottingham Drive (O)
White Marsh, MD

816

3,976

485

816

4,461

5,277

(763
)
2002
1/9/2007
5355 Nottingham Drive (O)
White Marsh, MD

761

3,562

1,616

761

5,178

5,939

(1,380
)
2005
1/9/2007
5520 Research Park Drive (O)
Catonsville, MD


20,066



20,066

20,066

(1,679
)
2009
4/4/2006
5522 Research Park Drive (O)
Catonsville, MD


4,550



4,550

4,550

(614
)
2007
3/8/2006
565 Space Center Drive (O)(10)
Colorado Springs, CO

644

6,284

352

644

6,636

7,280

(107
)
2009
7/8/2005
5725 Mark Dabling Boulevard (O)
Colorado Springs, CO
12,882

900

11,397

2,832

900

14,229

15,129

(4,567
)
1984
5/18/2006
5755 Mark Dabling Boulevard (O)
Colorado Springs, CO
10,208

799

10,324

3,597

799

13,921

14,720

(3,464
)
1989
5/18/2006
5775 Mark Dabling Boulevard (O)
Colorado Springs, CO
12,477

1,035

12,440

1,658

1,035

14,098

15,133

(4,260
)
1984
5/18/2006
5825 University Research Court (O)
College Park, MD
16,292


22,190

11


22,201

22,201

(2,118
)
2008
1/29/2008
5850 University Research Court (O)
College Park, MD
22,183


30,273

57


30,330

30,330

(2,236
)
2008
1/29/2008
655 Space Center Drive (O)(10)
Colorado Springs, CO

745

15,445

59

745

15,504

16,249


2008
7/8/2005
6700 Alexander Bell Drive (O)
Columbia, MD
4,000

1,755

7,019

4,628

1,755

11,647

13,402

(4,568
)
1988
5/14/2001
6708 Alexander Bell Drive (O)
Columbia, MD
6,320

897

3,588

1,592

897

5,180

6,077

(2,440
)
1988
5/14/2001
6711 Columbia Gateway Drive (O)
Columbia, MD

2,683

23,239

314

2,683

23,553

26,236

(3,503
)
2006-2007
9/28/2000
6716 Alexander Bell Drive (O)
Columbia, MD

1,242

4,969

2,525

1,242

7,494

8,736

(3,394
)
1990
12/31/1998
6721 Columbia Gateway Drive (O)
Columbia, MD
29,252

1,753

34,090


1,753

34,090

35,843

(3,233
)
2009
9/28/2000
6724 Alexander Bell Drive (O)
Columbia, MD
10,939

449

5,039

579

449

5,618

6,067

(1,787
)
2001
5/14/2001
6731 Columbia Gateway Drive (O)
Columbia, MD

2,807

19,098

1,648

2,807

20,746

23,553

(6,546
)
2002
3/29/2000
6740 Alexander Bell Drive (O)
Columbia, MD

1,424

5,696

3,045

1,424

8,741

10,165

(3,933
)
1992
12/31/1998
6741 Columbia Gateway Drive (O)
Columbia, MD

675

1,711

114

675

1,825

2,500

(195
)
2008
9/28/2000
6750 Alexander Bell Drive (O)
Columbia, MD

1,263

12,461

3,351

1,263

15,812

17,075

(5,893
)
2001
12/31/1998
6760 Alexander Bell Drive (O)
Columbia, MD

890

3,561

1,979

890

5,540

6,430

(2,582
)
1991
12/31/1998
6940 Columbia Gateway Drive (O)
Columbia, MD
17,300

3,545

9,916

3,162

3,545

13,078

16,623

(5,274
)
1999
11/13/1998
6950 Columbia Gateway Drive (O)
Columbia, MD

3,596

14,269

1,033

3,596

15,302

18,898

(5,975
)
1998
10/22/1998
7000 Columbia Gateway Drive (O)
Columbia, MD
15,800

3,131

12,103

622

3,131

12,725

15,856

(3,246
)
1999
5/31/2002
7015 Albert Einstein Drive (O)
Columbia, MD
2,486

2,058

6,093

826

2,058

6,919

8,977

(2,179
)
1999
12/1/2005
7061 Columbia Gateway Drive (O)
Columbia, MD

729

3,094

571

729

3,665

4,394

(1,460
)
2000
8/30/2001
7063 Columbia Gateway Drive (O)
Columbia, MD

902

3,684

1,043

902

4,727

5,629

(2,058
)
2000
8/30/2001
7065 Columbia Gateway Drive (O)
Columbia, MD

919

3,763

1,263

919

5,026

5,945

(1,923
)
2000
8/30/2001
7067 Columbia Gateway Drive (O)
Columbia, MD

1,829

11,823

2,415

1,829

14,238

16,067

(4,340
)
2001
8/30/2001
7125 Columbia Gateway Drive (L)
Columbia, MD

3,361

128

279

3,361

407

3,768


1973/1999(8)
6/29/2006
7125 Columbia Gateway Drive (O)
Columbia, MD
33,779

17,126

46,994

6,583

17,126

53,577

70,703

(10,556
)
1973/1999
6/29/2006
7130 Columbia Gateway Drive (O)
Columbia, MD
6,519

1,350

4,359

1,784

1,350

6,143

7,493

(1,577
)
1989
9/19/2005
7134 Columbia Gateway Drive (O)
Columbia, MD
2,949

704

1,971

299

704

2,270

2,974

(499
)
1990
9/19/2005
7138 Columbia Gateway Drive (O)
Columbia, MD
5,406

1,104

3,518

1,961

1,104

5,479

6,583

(2,174
)
1990
9/19/2005
7142 Columbia Gateway Drive (O)
Columbia, MD
6,280

1,342

3,978

1,326

1,342

5,304

6,646

(1,406
)
1994
9/19/2005
7150 Columbia Gateway Drive (O)
Columbia, MD
4,850

1,032

3,429

321

1,032

3,750

4,782

(867
)
1991
9/19/2005
 
 
 
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)
7150 Riverwood Drive (O)
Columbia, MD

1,821

4,388

972

1,821

5,360

7,181

(1,163
)
2000
1/10/2007
7160 Riverwood Drive (O)
Columbia, MD

2,732

7,006

1,503

2,732

8,509

11,241

(2,688
)
2000
1/10/2007
7170 Riverwood Drive (O)
Columbia, MD

1,283

3,096

594

1,283

3,690

4,973

(726
)
2000
1/10/2007
7175 Riverwood Drive (O)
Columbia, MD

1,788

4,133


1,788

4,133

5,921


1996(7)
7/27/2005
7200 Redstone Gateway (O)
Huntsville, MD


4,531



4,531

4,531


(7)
3/23/2010
7200 Riverwood Road (O)
Columbia, MD

4,089

16,356

3,001

4,089

19,357

23,446

(6,741
)
1986
10/13/1998
7205 Riverwood Drive (O)
Columbia, MD

1,367

14,300


1,367

14,300

15,667


(7)
7/27/2005
7272 Park Circle Drive (O)
Hanover, MD
5,232

1,479

6,300

1,798

1,479

8,098

9,577

(1,663
)
1991/1996
1/10/2007
7318 Parkway Drive (O)
Hanover, MD

972

3,888

812

972

4,700

5,672

(1,582
)
1984
4/16/1999
7320 Parkway Drive (O)
Hanover, MD
7,000

905

3,570

1,575

905

5,145

6,050

(1,557
)
1983
4/4/2002
745 Space Center Drive (O)(10)
Colorado Springs, CO

654

7,521

15

654

7,536

8,190

(171
)
2006
7/8/2005
7467 Ridge Road (O)
Hanover, MD

1,629

6,517

1,924

1,629

8,441

10,070

(3,346
)
1990
4/28/1999
7700 Potranco Road (O)
San Antonio, TX

14,020

38,804

7

14,020

38,811

52,831

(5,703
)
1982/1985
3/30/2005
7700-1 Potranco Road (O)
San Antonio, TX


1,066



1,066

1,066

(108
)
2007
3/30/2005
7700-5 Potranco Road (O)
San Antonio, TX


1,884



1,884

1,884

(154
)
2009
3/30/2005
7740 Milestone Parkway (O)
Hanover, MD
17,548

3,825

34,363

61

3,825

34,424

38,249

(2,265
)
2009
7/2/2007
7770 Backlick Road (O)
Springfield, VA
931

6,387

71,600

8

6,387

71,608

77,995

(157
)
2012(7)
3/10/2010
800 International Drive (O)
Linthicum, MD
8,408

775

3,099

947

775

4,046

4,821

(1,662
)
1988
4/30/1998
8000 Potranco Road (O)
San Antonio, TX

1,964

21,178


1,964

21,178

23,142

(1,149
)
2010
1/20/2006
8003 Corporate Drive (O)
White Marsh, MD

611

1,611

53

611

1,664

2,275

(311
)
1999
1/9/2007
8007 Corporate Drive (O)
White Marsh, MD

1,434

3,336

307

1,434

3,643

5,077

(727
)
1995
1/9/2007
8010 Corporate Drive (O)
White Marsh, MD

1,349

3,262

1,672

1,349

4,934

6,283

(842
)
1998
1/9/2007
8013 Corporate Drive (O)
White Marsh, MD

642

1,536

1,809

642

3,345

3,987

(432
)
1990
1/9/2007
8015 Corporate Drive (O)
White Marsh, MD

446

1,116

243

446

1,359

1,805

(306
)
1990
1/9/2007
8019 Corporate Drive (O)
White Marsh, MD

680

1,898

738

680

2,636

3,316

(555
)
1990
1/9/2007
8020 Corporate Drive (O)
White Marsh, MD

2,184

3,767

2,199

2,184

5,966

8,150

(954
)
1997
1/9/2007
8023 Corporate Drive (O)
White Marsh, MD

651

1,603

5

651

1,608

2,259

(267
)
1990
1/9/2007
8030 Potranco Road (O)
San Antonio, TX

1,964

21,298


1,964

21,298

23,262

(1,148
)
2010
1/20/2006
8094 Sandpiper Circle (O)
White Marsh, MD

1,960

3,716

369

1,960

4,085

6,045

(820
)
1998
1/9/2007
8098 Sandpiper Circle (O)
White Marsh, MD

1,797

3,651

633

1,797

4,284

6,081

(558
)
1998
1/9/2007
8100 Potranco Road (L)
San Antonio, TX

1,964

1,396


1,964

1,396

3,360


(8)
6/14/2005
8110 Corporate Drive (O)
White Marsh, MD

2,285

10,117

489

2,285

10,606

12,891

(2,202
)
2001
1/9/2007
8140 Corporate Drive (O)
White Marsh, MD

2,158

8,457

2,018

2,158

10,475

12,633

(3,046
)
2003
1/9/2007
849 International Drive (O)
Linthicum, MD
11,692

1,356

5,426

3,081

1,356

8,507

9,863

(4,043
)
1988
2/23/1999
8621 Robert Fulton Drive (O)
Columbia, MD
11,000

2,317

12,642

199

2,317

12,841

15,158

(2,314
)
2005-2006
6/10/2005
8661 Robert Fulton Drive (O)
Columbia, MD
6,200

1,510

3,764

1,042

1,510

4,806

6,316

(1,518
)
2002
12/30/2003
8671 Robert Fulton Drive (O)
Columbia, MD
7,600

1,718

4,280

1,941

1,718

6,221

7,939

(2,148
)
2002
12/30/2003
870 Elkridge Landing Road (O)
Linthicum, MD
18,900

2,003

9,442

6,689

2,003

16,131

18,134

(7,148
)
1981
8/3/2001
881 Elkridge Landing Road (O)
Linthicum, MD
11,812

1,034

4,137

1,049

1,034

5,186

6,220

(1,991
)
1986
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)
891 Elkridge Landing Road (O)
Linthicum, MD

1,165

4,772

1,777

1,165

6,549

7,714

(2,674
)
1984
7/2/2001
900 Elkridge Landing Road (O)
Linthicum, MD

1,993

7,972

2,887

1,993

10,859

12,852

(4,722
)
1982
4/30/1998
900 International Drive (O)
Linthicum, MD
8,008

981

3,922

834

981

4,756

5,737

(1,964
)
1986
4/30/1998
901 Elkridge Landing Road (O)
Linthicum, MD

1,156

4,437

1,558

1,156

5,995

7,151

(2,148
)
1984
7/2/2001
911 Elkridge Landing Road (O)
Linthicum, MD

1,215

4,861

2,024

1,215

6,885

8,100

(2,789
)
1985
4/30/1998
920 Elkridge Landing Road (O)
Linthicum, MD

2,081

9,683

687

2,081

10,370

12,451

(4,084
)
1982
7/2/2001
921 Elkridge Landing Road (O)
Linthicum, MD

1,044

4,176

639

1,044

4,815

5,859

(1,989
)
1983
4/30/1998
930 International Drive (O)
Linthicum, MD
8,488

1,013

4,053

1,100

1,013

5,153

6,166

(2,203
)
1986
4/30/1998
938 Elkridge Landing Road (O)
Linthicum, MD

1,209

4,748

476

1,209

5,224

6,433

(1,615
)
1984
7/2/2001
939 Elkridge Landing Road (O)
Linthicum, MD

939

3,756

1,790

939

5,546

6,485

(2,452
)
1983
4/30/1998
940 Elkridge Landing Road (L)
Linthicum, MD

1,104

4,718

170

1,104

4,888

5,992

(4,884
)
(8)
7/2/2001
9651 Hornbaker Road (D)
Manassas, VA

6,050

196,428

253

6,050

196,681

202,731

(2,809
)
2010
9/14/2010
9690 Deereco Road (O)
Timonium, MD

3,415

13,723

5,833

3,415

19,556

22,971

(7,927
)
1988
12/21/1999
980 Technology Court (O)(10)
Colorado Springs, CO

526

2,046

442

526

2,488

3,014

(585
)
1995
9/28/2005
985 Space Center Drive (O)(10)
Colorado Springs, CO

777

12,287

1,569

777

13,856

14,633

(2,948
)
1989
9/28/2005
9900 Franklin Square Drive (O)
White Marsh, MD

979

3,466

202

979

3,668

4,647

(734
)
1999
1/9/2007
9910 Franklin Square Drive (O)
White Marsh, MD
5,040

1,219

6,590

65

1,219

6,655

7,874

(1,457
)
2005
1/9/2007
9920 Franklin Square Drive (O)
White Marsh, MD

1,058

5,293

1,429

1,058

6,722

7,780

(1,470
)
2006
1/9/2007
9925 Federal Drive (O)(10)
Colorado Springs, CO

1,129

4,334

80

1,129

4,414

5,543

(97
)
2008
9/28/2005
9930 Franklin Square Drive (O)
White Marsh, MD

1,137

3,921

36

1,137

3,957

5,094

(795
)
2001
1/9/2007
9940 Franklin Square Drive (O)
White Marsh, MD

1,052

3,382

281

1,052

3,663

4,715

(732
)
2000
1/9/2007
9945 Federal Drive (O)(10)
Colorado Springs, CO

1,854

849


1,854

849

2,703

(13
)
2009
9/28/2005
9950 Federal Drive (O)(10)
Colorado Springs, CO

877

5,045

1,501

877

6,546

7,423

(1,944
)
2001
12/22/2005
9960 Federal Drive (O)(10)
Colorado Springs, CO

695

2,286

291

695

2,577

3,272

(256
)
2001
12/22/2005
9965 Federal Drive (L)(10)
Colorado Springs, CO

466



466


466


(8)
12/22/2005
9965 Federal Drive (O)(10)
Colorado Springs, CO

1,401

6,061

565

1,401

6,626

8,027

(907
)
1983/2007
1/19/2006
999 Corporate Boulevard (O)
Linthicum, MD
13,533

1,187

8,332

556

1,187

8,888

10,075

(3,230
)
2000
8/1/1999
Aerotech Commerce (L)
Colorado Springs, CO

900



900


900


(8)
5/19/2006
Arborcrest (O)
Blue Bell, PA

21,969

83,529

1,094

21,969

84,623

106,592

(2,686
)
1991(6)(7)
10/14/1997
Arundel Preserve (L)
Hanover, MD


5,886



5,886

5,886


(8)
(9)
Ashburn Crossing - DC-8 (O)
Ashburn, VA

7,291



7,291


7,291


(7)
12/27/2012
Ashburn Crossing - DC-9 (O)
Ashburn, VA

4,192



4,192


4,192


(7)
12/27/2012
Ashburn Crossing (L)
Ashburn, VA

4,309

3


4,309

3

4,312


(8)
12/27/2012
Canton Crossing Land (L)
Baltimore, MD

16,085

1,820


16,085

1,820

17,905


(8)
10/27/2009
Canton Crossing Util Distr Ctr (O)
Baltimore, MD

7,300

15,550

722

7,300

16,272

23,572

(1,655
)
2005
10/27/2009
Columbia Gateway - Southridge (L)
Columbia, MD

6,387

2,938


6,387

2,938

9,325


(8)
9/20/2004
Dahlgren Technology Center (L)
Dahlgren, VA

1,083

178


1,083

178

1,261


(8)
3/16/2005
Expedition VII (L)
Lexington Park, MD

705

726


705

726

1,431


(8)
3/24/2004
Indian Head (L)
Bryans Road, MD

6,436



6,436


6,436


(8)
10/23/2006
 
 
 
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)
InterQuest (L)
Colorado Springs, CO

14,515

8


14,515

8

14,523


(8)
9/28/2005
M Square Research Park (L)
College Park, MD


3,602



3,602

3,602


(8)
1/29/2008
National Business Park (L)
Annapolis Junction, MD

2,372

6,354


2,372

6,354

8,726


(8)
11/14/2003
National Business Park North (L)
Jessup, MD

25,654

25,069


25,654

25,069

50,723


(8)
6/29/2006
North Gate Business Park (L)
Aberdeen, MD

6,486

10,717


6,486

10,717

17,203


(8)
9/14/2007
Northwest Crossroads (L)
San Antonio, TX

7,430

836


7,430

836

8,266


(8)
1/20/2006
Old Annapolis Road (O)
Columbia, MD

1,637

5,500

2,103

1,637

7,603

9,240

(2,333
)
1974/1985
12/14/2000
Patriot Park (L)
Colorado Springs, CO

8,768

248


8,768

248

9,016


(8)
7/8/2005
Patriot Ridge (L)
Springfield, VA

18,517

10,873


18,517

10,873

29,390


(8)
3/10/2010
Redstone Gateway (L)
Huntsville, AL


13,700



13,700

13,700


(8)
3/23/2010
Route 15/Biggs Ford Road (L)
Frederick, MD

8,703

526


8,703

526

9,229


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

8,275

3,621


8,275

3,621

11,896


(8)
3/30/2005
West Nursery Road (L)
Linthicum, MD

1,441

53


1,441

53

1,494


(8)
10/28/2009
Westfields - Park Center (L)
Herndon, VA

3,609

2,640


3,609

2,640

6,249


(8)
7/18/2002
Westfields Corporate Center (L)
Herndon, VA

7,141

1,342


7,141

1,342

8,483


(8)
7/31/2002
White Marsh (L)
White Marsh, MD

30,322

10,385


30,322

10,385

40,707


(8)
1/9/2007
Woodland Park (L)
Herndon, VA

9,614

81


9,614

81

9,695


(8)
4/29/2004
Other Developments, including intercompany eliminations (V)
Various

7

(152
)
(438
)
7

(590
)
(583
)
689

Various
Various
 
 
$
1,015,130

$
681,001

$
2,893,547

$
285,412

$
681,001

$
3,178,959

$
3,859,960

$
(568,176
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
A legend for the Property Type follows: (O) = Office Property; (L) = Land held or pre-construction; (D) = Data Center; and (V) = Various.
(2)
Excludes our term loan facilities of $770.0 million, senior exchangeable notes of $230.9 million, unsecured notes payable of $1.8 million, and net premiums on the remaining loans of $1.3 million.
(3)
The aggregate cost of these assets for Federal income tax purposes was approximately $3.4 billion at December 31, 2012.
(4)
As discussed in Note 5 to our Consolidated Financial Statements, we recognized impairment losses of $46.1 million in connection with our property in Greater Philadelphia, Pennsylvania and $19.0 million, including exit costs, in connection with certain properties included in our Strategic Reallocation Plan.
(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)
Under construction or redevelopment at December 31, 2012.
(8)
Held or under pre-construction at December 31, 2012.
(9)
Development in progress in anticipation of acquisition at December 31, 2012.
(10)
Included in our Strategic Reallocation Plan and classified as held for sale as of December 31, 2012.
The following table summarizes our changes in cost of properties for the years ended December 31, 2012, 2011 and 2010 (in thousands):
 
 
 
 
 
 
2012
 
2011
 
2010
 
Beginning balance
 
 
$
4,038,932

 
$
3,948,487

 
$
3,452,512

 
Acquisitions of operating properties
 
 
33,684

 
26,887

 
187,052

 
Improvements and other additions
 
 
214,418

 
304,079

 
338,358

 
Sales
 
 
(291,491
)
 
(75,315
)
 
(29,430
)
 
Impairments
 
 
(121,557
)
 
(165,206
)
 

 
Other dispositions
 
 
(13,891
)
 

 

 
Other
 
 
(135
)
 

 
(5
)
 
Ending balance
 
 
$
3,859,960

 
$
4,038,932

 
$
3,948,487

 
 
 
 
 
 
 
 
 
 
 
The following table summarizes our changes in accumulated depreciation for the same time periods (in thousands):
 
 
 
 
 
 
2012
 
2011
 
2010
 
Beginning balance
 
 
$
577,601

 
$
503,032

 
$
422,612

 
Depreciation expense
 
 
93,158

 
99,173

 
88,048

 
Sales
 
 
(40,346
)
 
(9,640
)
 
(7,764
)
 
Impairments
 
 
(58,855
)
 
(15,039
)
 

 
Other dispositions
 
 
(3,247
)
 

 

 
Other
 
 
(135
)
 
75

 
136

 
Ending balance
 
 
$
568,176

 
$
577,601

 
$
503,032