Park Slope, Mountainside, NJ Property Records

Union County and Mountainside Borough property records for 7 addresses on Park Slope, Mountainside, NJ · Last verified July 2026

Park Slope Highlights

Properties 7
Median Sale Price $710,000
Deeds and Mortgages on File 8
Median Price per Sqft $308
Owner Occupied 100%
Median Annual Tax Bill $13,944
Median Year Built 1953
Median Ownership Tenure 5 years

Properties on Park Slope

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

375 Park Slope

2,168 sqft · built 1960 · 1 acres

Last Sale Tax Bill Prior Sale Owner Records
—Mar 1968 $12,9072025 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

379 Park Slope

1,651 sqft · built 1945 · 0.98 acres

Last Sale Tax Bill Prior Sale Owner Records
$690,000Nov 2021 $12,2122025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

383 Park Slope

2,609 sqft · built 1941 · 0.95 acres

Last Sale Tax Bill Prior Sale Owner Records
$805,000Apr 2024 $14,5382025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

387 Park Slope

2,151 sqft · built 1950 · 1 acres

Last Sale Tax Bill Prior Sale Owner Records
$710,000Oct 2021 $12,3212025 Amount on Record Oct 1997 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

391 Park Slope

2,513 sqft · built 1953 · 1.08 acres

Last Sale Tax Bill Prior Sale Owner Records
$716,500Nov 2009 $13,9442025 Amount on Record Nov 1996 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

395 Park Slope

5,095 sqft · built 1976 · 0.61 acres

Last Sale Tax Bill Prior Sale Owner Records
$500,000Jun 1989 $20,7082025 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

399 Park Slope

3,792 sqft · built 1965 · 0.496 acres

Last Sale Tax Bill Prior Sale Owner Records
$15,8552025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

Property Records in Nearby Streets