E Diamond Ave, Gaithersburg, MD Property Records

Montgomery County property records for 74 addresses on E Diamond Ave, Gaithersburg, MD · Last verified August 2026

E Diamond Ave Highlights

Properties 74
Median Sale Price $1,550,000
Deeds and Mortgages on File 72
Median Price per Sqft $229
Owner Occupied 19%
Median Annual Tax Bill $17,862
Median Year Built 1950
Median Ownership Tenure 12 years

Properties on E Diamond Ave

Owner names and prior sale amounts shown locked below are available instantly with a free trial.

1 E Diamond Ave

11,580 sqft · built 2000 · 1.04 acres

Last Sale Tax Bill Prior Sale Owner Records
$45,3452025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

2 E Diamond Ave

3,280 sqft · built 1971 · 0.462 acres

Last Sale Tax Bill Prior Sale Owner Records
$810,000Aug 2014 $18,8802025 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

3 E Diamond Ave

9,912 sqft · built 2005 · 0.943 acres

Last Sale Tax Bill Prior Sale Owner Records
—May 2003 $42,0182025 1 Name on Record AssessorUpdated Aug 2026

4 E Diamond Ave

0.153 acres

Last Sale Tax Bill Prior Sale Owner Records
$40,000Aug 2014 $4532025 1 Name on Record AssessorUpdated Aug 2026

6 E Diamond Ave

1,712 sqft · built 1889 · 0.235 acres

Last Sale Tax Bill Prior Sale Owner Records
$510,000Nov 2017 $8,6142025 Amount on Record Dec 2015 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

8 E Diamond Ave

13,888 sqft · built 1973 · 1.08 acres

Last Sale Tax Bill Prior Sale Owner Records
$48,8282025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

13 E Diamond Ave

9,250 sqft · 0.077 acres

Last Sale Tax Bill Prior Sale Owner Records
$2252025 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

16 E Diamond Ave

6,980 sqft · built 1967 · 0.288 acres

Last Sale Tax Bill Prior Sale Owner Records
$25,2262025 2 Names on Record AssessorUpdated Aug 2026

18 E Diamond Ave

1,716 sqft · built 1899 · 0.286 acres

Last Sale Tax Bill Prior Sale Owner Records
$416,000Nov 2004 $8,2752025 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

20 E Diamond Ave

9,996 sqft · built 1957 · 0.269 acres

Last Sale Tax Bill Prior Sale Owner Records
$8,125,000Dec 2008 $20,4752025 Amount on Record Jun 2000 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

106 E Diamond Ave

2,488 sqft · built 1977 · 0.389 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,425,000Nov 2025 $20,6392025 Amount on Record Jul 2014 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

107 E Diamond Ave

1,918 sqft · built 1947 · 0.084 acres

Last Sale Tax Bill Prior Sale Owner Records
$375,000May 2013 $7,8522025 Amount on Record Apr 1990 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

110 E Diamond Ave

4,982 sqft · built 1966 · 0.516 acres

Last Sale Tax Bill Prior Sale Owner Records
—Mar 2006 $20,3522025 1 Name on Record AssessorUpdated Aug 2026

115 E Diamond Ave

6,756 sqft · built 1974 · 0.548 acres

Last Sale Tax Bill Prior Sale Owner Records
—Dec 2007 $25,1452025 1 Name on Record AssessorUpdated Aug 2026

116 E Diamond Ave

2,255 sqft · built 1977 · 0.355 acres

Last Sale Tax Bill Prior Sale Owner Records
$290,000Mar 1991 $11,5892025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

122 E Diamond Ave

1,320 sqft · built 1936 · 0.239 acres

Last Sale Tax Bill Prior Sale Owner Records
$430,000May 2017 $7,3772025 1 Name on Record Assessor + 4 DocumentsUpdated Aug 2026

124 E Diamond Ave

4,132 sqft · built 1897 · 0.201 acres

Last Sale Tax Bill Prior Sale Owner Records
$565,000Feb 2016 $9,2032025 —Sep 1998 1 Name on Record AssessorUpdated Aug 2026

125 E Diamond Ave

1,900 sqft · built 1959 · 0.023 acres

Last Sale Tax Bill Prior Sale Owner Records
$600,000Jun 2016 $9,9662025 Amount on Record Sep 2007 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

200 E Diamond Ave

7,155 sqft · built 1874 · 0.258 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,680,000Jan 2024 $9,0682025 Amount on Record Apr 2021 1 Name on Record Assessor + 3 DocumentsUpdated Aug 2026

201 E Diamond Ave

8,595 sqft · built 2009 · 0.051 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,465,000Jun 2013 $24,4152025 Amount on Record Apr 2013 1 Name on Record AssessorUpdated Aug 2026

206 E Diamond Ave

5,196 sqft · built 1934 · 0.211 acres

Last Sale Tax Bill Prior Sale Owner Records
$14,9622025 2 Names on Record AssessorUpdated Aug 2026

207 E Diamond Ave

2,440 sqft · built 1939 · 0.055 acres

Last Sale Tax Bill Prior Sale Owner Records
$265,000Dec 2000 $7,4192025 —Nov 1995 2 Names on Record AssessorUpdated Aug 2026

210 E Diamond Ave

8,704 sqft · built 1950 · 0.224 acres

Last Sale Tax Bill Prior Sale Owner Records
$370,000Jun 2022 $32,6542025 1 Name on Record AssessorUpdated Aug 2026

221 E Diamond Ave

5,752 sqft · built 1900 · 0.174 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,000,000Sep 2025 $23,3522025 Amount on Record Jan 2007 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

223 E Diamond Ave

2,940 sqft · built 1933 · 0.066 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,6912025 1 Name on Record AssessorUpdated Aug 2026

226 E Diamond Ave

14,896 sqft · built 1849 · 0.516 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,307,500Jan 2007 $33,1212025 Amount on Record Dec 2006 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

227 E Diamond Ave

9,200 sqft · built 1903 · 0.129 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,950,000Mar 2024 $28,2182025 Amount on Record Oct 2022 1 Name on Record Assessor + 4 DocumentsUpdated Aug 2026

300 E Diamond Ave

1,276 sqft · built 1900 · 0.342 acres

Last Sale Tax Bill Prior Sale Owner Records
—Oct 2000 2 Names on Record Owner Occupied AssessorUpdated Aug 2026

302 E Diamond Ave

6,848 sqft · built 1892 · 0.094 acres

Last Sale Tax Bill Prior Sale Owner Records
$300,000Aug 2020 $18,8302025 —Sep 2008 2 Names on Record Assessor + 3 DocumentsUpdated Aug 2026

306 E Diamond Ave

9,960 sqft · built 1919 · 0.249 acres

Last Sale Tax Bill Prior Sale Owner Records
$850,000Aug 1998 $36,3942025 —Aug 1998 2 Names on Record Assessor + 1 DocumentUpdated Aug 2026

312 E Diamond Ave

14,784 sqft · built 1919 · 0.345 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,000,000Jul 1995 $24,9752025 2 Names on Record AssessorUpdated Aug 2026

315 E Diamond Ave

13,050 sqft · built 1974 · 0.994 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,400,000Jul 1998 $1,8392025 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

316 E Diamond Ave

4,800 sqft · built 1934 · 0.193 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,550,000Oct 2024 $12,6622025 —Mar 2005 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

317 E Diamond Ave

28,260 sqft · built 1941 · 0.989 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,850,000Jun 2025 $48,8112025 Amount on Record Oct 1993 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

370 E Diamond Ave

912,992 sqft · built 2013 · 6.1 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,320,1092025 2 Names on Record AssessorUpdated Aug 2026

403 E Diamond Ave

2,652 sqft · built 1899 · 0.25 acres

Last Sale Tax Bill Prior Sale Owner Records
$615,000Mar 2022 $8,8302025 Amount on Record Mar 2005 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

405 E Diamond Ave

1,700 sqft · built 1909 · 0.272 acres

Last Sale Tax Bill Prior Sale Owner Records
$550,000Jun 2024 $3,3192025 Amount on Record Aug 1997 1 Name on Record AssessorUpdated Aug 2026

407 E Diamond Ave

0.279 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,100,000Aug 2023 $1,7062025 Amount on Record Nov 2019 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

409 E Diamond Ave

1,651 sqft · built 1966 · 0.293 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,100,000Aug 2023 $25,7082025 Amount on Record Nov 2019 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

411 E Diamond Ave

3,200 sqft · built 1979 · 0.296 acres

Last Sale Tax Bill Prior Sale Owner Records
$265,000Jul 1999 $11,1182025 2 Names on Record AssessorUpdated Aug 2026

412 E Diamond Ave

4,780 sqft · built 1877 · 0.971 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,6282025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

413 E Diamond Ave

4,725 sqft · built 1986 · 0.307 acres

Last Sale Tax Bill Prior Sale Owner Records
$445,000Jul 1999 $19,1402025 2 Names on Record AssessorUpdated Aug 2026

414 E Diamond Ave

2,148 sqft · built 1899 · 0.542 acres

Last Sale Tax Bill Prior Sale Owner Records
$405,000Sep 2003 $7742025 Amount on Record Jun 1995 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

415 E Diamond Ave

8,694 sqft · built 1889 · 0.516 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,750,000Jan 2019 $29,2442025 —Jan 1999 1 Name on Record Assessor + 5 DocumentsUpdated Aug 2026

416 E Diamond Ave

1,710 sqft · built 1899 · 0.435 acres

Last Sale Tax Bill Prior Sale Owner Records
$173,000Apr 1999 $6,0432025 —Apr 1998 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

418 E Diamond Ave

4,104 sqft · built 1915 · 0.449 acres

Last Sale Tax Bill Prior Sale Owner Records
$750,000Jul 2024 $12,2142025 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

419 E Diamond Ave

10,017 sqft · built 1986 · 0.471 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,300,000Feb 2026 $26,7532025 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

420 E Diamond Ave

3,434 sqft · built 1911 · 0.495 acres

Last Sale Tax Bill Prior Sale Owner Records
$217,500Sep 1995 $6,1252025 2 Names on Record AssessorUpdated Aug 2026

422 E Diamond Ave

1,149 sqft · built 1932 · 0.436 acres

Last Sale Tax Bill Prior Sale Owner Records
—May 1996 $4,2862025 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

424 E Diamond Ave

1,506 sqft · built 1948 · 0.371 acres

Last Sale Tax Bill Prior Sale Owner Records
$74,000Nov 1989 $5,8952025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

425 E Diamond Ave

24,000 sqft · built 1984 · 1.1 acres

Last Sale Tax Bill Prior Sale Owner Records
$52,3952025 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

426 E Diamond Ave

2,352 sqft · built 1927 · 0.322 acres

Last Sale Tax Bill Prior Sale Owner Records
$200,000Oct 1999 $6,2092025 2 Names on Record Owner Occupied AssessorUpdated Aug 2026

428 E Diamond Ave

1,858 sqft · built 1990 · 0.352 acres

Last Sale Tax Bill Prior Sale Owner Records
$335,000Mar 2017 $6,9952025 Amount on Record Apr 1998 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

429 E Diamond Ave

16,800 sqft · built 1982 · 0.627 acres

Last Sale Tax Bill Prior Sale Owner Records
$950,000Sep 2003 $32,2322025 —Sep 2003 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

430 E Diamond Ave

2,233 sqft · built 1874 · 0.28 acres

Last Sale Tax Bill Prior Sale Owner Records
$445,000Dec 2021 $6,9612025 —Nov 2021 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

431 E Diamond Ave

10,600 sqft · built 1983 · 0.604 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,900,000Jun 2024 $22,4132025 —Apr 2009 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

433 E Diamond Ave

26,656 sqft · built 1979 · 1.5 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,230,227Jan 2026 $51,1182025 Amount on Record Jun 2017 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

434 E Diamond Ave

1,300 sqft · built 1923 · 0.178 acres

Last Sale Tax Bill Prior Sale Owner Records
$385,000Apr 2021 $5,8002025 Amount on Record May 2004 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

436 E Diamond Ave

1,575 sqft · built 1950 · 0.356 acres

Last Sale Tax Bill Prior Sale Owner Records
$140,000Jun 2011 Amount on Record Sep 2004 1 Name on Record AssessorUpdated Oct 2023

438 E Diamond Ave

0.307 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,8482025 1 Name on Record AssessorUpdated Aug 2026

440 E Diamond Ave

1 ba · 900 sqft · built 1946 · 0.143 acres

Last Sale Tax Bill Prior Sale Owner Records
$230,000May 2015 $4,6242025 Amount on Record Jun 2001 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

442 E Diamond Ave

1,352 sqft · built 1856 · 0.166 acres

Last Sale Tax Bill Prior Sale Owner Records
$350,000Jul 2013 $6,0842025 Amount on Record Apr 2003 1 Name on Record AssessorUpdated Aug 2026

500 E Diamond Ave

68,250 sqft · built 1988 · 3 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,720,000Apr 1994 $162,4172025 1 Name on Record AssessorUpdated Aug 2026

501 E Diamond Ave

43,633 sqft · built 2002 · 2.02 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,350,000Jul 2014 $165,0562025 Amount on Record Jan 2006 1 Name on Record AssessorUpdated Aug 2026

504 E Diamond Ave

64,000 sqft · built 1988 · 3.41 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,572,000Feb 2014 $132,9822025 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

602 E Diamond Ave

58,326 sqft · built 1994 · 3.2 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,250,000Feb 2014 $125,8672025 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

610 E Diamond Ave

23,016 sqft · built 1994 · 1.17 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,800,000Jun 2002 $5,5182025 Amount on Record Feb 1999 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

620 E Diamond Ave, #3

24,083 sqft · built 1994 · 1.89 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,286,774Jan 2024 $61,8642025 Amount on Record Feb 2014 1 Name on Record Assessor + 3 DocumentsUpdated Aug 2026

630 E Diamond Ave, #4

74,603 sqft · built 1994 · 5.1 acres

Last Sale Tax Bill Prior Sale Owner Records
$6,141,000Feb 2014 $150,0702025 Amount on Record Sep 1998 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

640 E Diamond Ave, #5

15,501 sqft · built 1994 · 1.04 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,200,000Nov 1995 $7,1882025 —Nov 1995 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

640 E Diamond Ave, #6

6,890 sqft · built 1994 · 0.654 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,200,000Nov 2023 $17,8622025 Amount on Record Feb 2014 1 Name on Record Assessor + 4 DocumentsUpdated Aug 2026

671 E Diamond Ave

4,725 sqft · built 1980 · 0.45 acres

Last Sale Tax Bill Prior Sale Owner Records
$450,000Sep 2012 $15,0672025 1 Name on Record AssessorUpdated Aug 2026

681 E Diamond Ave

25,645 sqft · built 1945 · 1.42 acres

Last Sale Tax Bill Prior Sale Owner Records
—Apr 2004 $28,5852025 1 Name on Record AssessorUpdated Aug 2026

700 E Diamond Ave

12,204 sqft · built 1985 · 3.06 acres

Last Sale Tax Bill Prior Sale Owner Records
—May 2005 $40,4242025 1 Name on Record Owner Occupied AssessorUpdated Aug 2026

Wildfire Risk on E Diamond Ave

Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

Property Records in Nearby Streets