William St, Somerville, NJ Property Records

Somerset County and Somerville Borough property records for 43 addresses on William St, Somerville, NJ · Last verified August 2026

William St Highlights

Properties 43
Median Sale Price $499,000
Deeds and Mortgages on File 39
Median Price per Sqft $249
Owner Occupied 79%
Median Annual Tax Bill $12,184
Median Year Built 1936
Median Ownership Tenure 19 years

Properties on William St

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

200 William St

1,638 sqft · Built 1951 · 0.689 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$150,000Dec 1998 $14,2152025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

210 William St

1,189 sqft · Built 1958 · 0.275 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$495,000Dec 2024 $12,2862025 Amount on Record Apr 2014 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

315 William St

2,400 sqft · Built 1920 · 0.176 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$339,900Oct 2002 $15,3292025 Amount on Record Jul 1990 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

325 William St

1,426 sqft · Built 1900 · 0.125 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$142,900Mar 1986 $10,4752025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

327 William St

1,685 sqft · Built 1900 · 0.129 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$320,000Nov 2009 $11,9962025 Amount on Record Oct 2007 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

329 William St

2,664 sqft · Built 1900 · 0.163 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$470,000Jan 2024 $12,9962025 Amount on Record Oct 1998 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

331 William St, #333

2,917 sqft · Built 1900 · 0.376 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$599,000May 2025 $14,9132025 Amount on Record Mar 2004 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

349 William St

1,214 sqft · Built 1900 · 0.442 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$137,500May 1995 $11,1812025 —May 1995 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

351 William St

1,868 sqft · Built 1900 · 0.192 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$10,7072025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

352 William St

2,260 sqft · Built 1900 · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$200,000Oct 1993 $14,4642025 Amount on Record Jul 1992 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

355 William St

2,094 sqft · Built 1900 · 0.166 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$160,000Jan 1989 $11,8332025 2 Names on Record AssessorUpdated Jul 2026

356 William St

1,528 sqft · Built 1950 · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$211,500Dec 2011 $10,8542025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

357 William St

1,870 sqft · Built 1962 · 0.166 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$383,000Jul 2008 $12,8732025 Amount on Record Sep 2003 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

360 William St

1,218 sqft · Built 1920 · 0.151 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$267,900Jun 2007 $10,4542025 Amount on Record May 1989 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

361 William St

1,425 sqft · Built 1918 · 0.146 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$517,000Dec 2025 $9,9042025 Amount on Record Jan 2022 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

364 William St

1,242 sqft · Built 1938 · 0.151 acres

Last Sale Tax Bill Prior Sale Owner Records
$138,000Nov 1998 $10,2262025 Amount on Record Dec 1996 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

368 William St

2,300 sqft · Built 1920 · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$11,1192025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

371 William St

1,240 sqft · Built 1920 · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$97,000May 1986 $10,2102025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

372 William St

2,172 sqft · Built 1870 · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$162,000Oct 1993 $14,1382025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

375 William St

1,292 sqft · Built 1938 · 0.153 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$130,000Jul 1991 $10,2792025 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

376 William St

1,152 sqft · Built 1952 · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
—Aug 1991 $10,9852025 —May 2010 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

381 William St

868 sqft · Built 1958 · 0.296 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$50,000Dec 1982 $11,0172025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

382 William St

1,205 sqft · Built 1950 · 0.258 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$227,500Dec 2016 $9,5822025 Amount on Record Jul 2014 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

387 William St

1,808 sqft · Built 1920 · 0.205 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$12,3152025 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

388 William St

3,148 sqft · Built 2019 · 0.258 acres

Last Sale Tax Bill Prior Sale Owner Records
$267,500May 2015 $18,9102025 Amount on Record Nov 2012 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

389 William St

1,198 sqft · Built 1920 · 0.133 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$220,000Jul 2002 $10,4992025 Amount on Record Jan 1993 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

392 William St, #394

1,664 sqft · Built 1940 · 0.172 acres

Last Sale Tax Bill Prior Sale Owner Records
$356,000Sep 2008 $10,5892025 2 Names on Record AssessorUpdated Jul 2026

393 William St

756 sqft · Built 1920 · 0.133 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$90,000Nov 2007 $8,0402025 —May 2009 1 Name on Record AssessorUpdated Jul 2026

396 William St, #398

1,964 sqft · Built 1920 · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$148,000Oct 1993 $12,1842025 —Oct 1993 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

397 William St

1,680 sqft · Built 1920 · 0.232 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$380,000Dec 2018 $13,1872025 Amount on Record Feb 2018 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

404 William St

1,524 sqft · Built 1952 · 0.169 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$310,000Sep 2004 $11,9472025 Amount on Record Sep 1995 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

405 William St

1,554 sqft · Built 1920 · 0.196 acres

Last Sale Tax Bill Prior Sale Owner Records
—Mar 1992 $10,2182025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

406 William St

1,068 sqft · Built 1936 · 0.321 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$326,000Jul 2006 $10,4872025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

411 William St

1,511 sqft · Built 1953 · 0.385 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$195,000Oct 2000 $13,2652025 Amount on Record May 1993 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

412 William St

1,500 sqft · Built 1968 · 0.201 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$150,000Sep 1992 $12,4042025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

416 William St

2,513 sqft · Built 2009 · 0.182 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$499,900Apr 2019 $17,9112025 Amount on Record Feb 2016 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

419 William St

1,252 sqft · Built 1953 · 0.261 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$312,100Jul 2022 $12,4492025 Amount on Record Apr 2022 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

420 William St

2,273 sqft · Built 2009 · 0.175 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$810,000Jun 2026 $16,8462025 Amount on Record Oct 2019 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

423 William St

1,688 sqft · Built 1962 · 0.211 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$289,000Feb 2015 $14,3992025 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

424 William St

2,273 sqft · Built 2009 · 0.175 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$429,900Dec 2009 $16,4712025 —Dec 2009 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

427 William St

2,176 sqft · Built 2020 · 0.169 acres

Last Sale Tax Bill Prior Sale Owner Records
$497,000Mar 2020 $17,5522025 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

441 William St

2,176 sqft · Built 2019 · 0.169 acres

Last Sale Tax Bill Prior Sale Owner Records
$499,000Nov 2019 $17,4912025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

453 William St

2,832 sqft · Built 1920 · 0.705 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$300,000Dec 2016 $31,2862025 Amount on Record Feb 2005 1 Name on Record Assessor + 4 DocumentsUpdated Jul 2026

Wildfire Risk on William St

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

Wildfire RiskLow
this street's cells rank at the 13th percentile of exposed land nationally · 26th in New Jersey
Wildfire LikelihoodLow — less than 1 in 10,000 per year
ExposureDirect
3 of 4 cells directly exposed · 4 adjoin burnable vegetation

Property Records in Nearby Streets