Union County, Westfield Town and Mountainside Borough property records for 23 addresses on Hillside Ave, Westfield, NJ · Last verified August 2026
| Properties | 23 |
|---|---|
| Median Sale Price | $2,100,000 |
| Deeds and Mortgages on File | 30 |
| Median Price per Sqft | $479 |
| Owner Occupied | 87% |
| Median Annual Tax Bill | $36,668 |
| Median Year Built | 1930 |
| Median Ownership Tenure | 15 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
5,668 sqft · built 1950 · 0.844 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,335,000Feb 2022 | $42,8542025 | 2 Names on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jul 2026 |
4,678 sqft · built 1952 · 0.792 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,080,000Mar 2019 | $26,4292025 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
3,651 sqft · built 1952 · 0.739 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,300,000Jan 2019 | $32,8902025 | Amount on Record Oct 2011 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
4,935 sqft · built 1890 · 0.739 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,900,000Jul 2005 | $40,6832025 | —Aug 1995 | 1 Name on Record | AssessorUpdated Jul 2026 |
4,179 sqft · built 1928 · 0.84 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $225,000Jul 1981 | $43,1812025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
3,797 sqft · built 1952 · 0.739 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $832,500Dec 1996 | $33,3692025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
4,753 sqft · built 1926 · 0.831 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,200,000Dec 1998 | $41,9922025 | Amount on Record Dec 1995 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5,539 sqft · built 1901 · 1.13 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,500,000Mar 2011 | $49,6652025 | Amount on Record Aug 1995 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4,710 sqft · built 1950 · 0.739 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,600,000May 2022 | $47,9012025 | Amount on Record Aug 2010 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4,462 sqft · built 1953 · 0.896 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $210,000Jun 1979 | $45,6862025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5,428 sqft · built 1900 · 0.554 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,750,000Sep 2003 | $42,7252025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5,726 sqft · built 1974 · 1.19 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,250,000Jul 2004 | $51,4192025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4,792 sqft · built 1921 · 1.01 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,300,000Oct 2021 | $45,9752025 | Amount on Record Feb 2001 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4,935 sqft · built 1965 · 0.994 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,825,000Oct 2002 | $43,4272025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
8,093 sqft · built 1850 · 1.76 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $125,000Dec 2008 | $36,6682025 | Amount on Record Dec 2007 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
3,794 sqft · built 1967 · 0.503 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,102,000Oct 2025 | $17,8612025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
2,435 sqft · built 1930 · 0.447 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,650,000Aug 2025 | $24,5792025 | Amount on Record Apr 2008 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
2,198 sqft · built 1928 · 0.258 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,465,000Oct 2023 | $23,0052025 | Amount on Record Aug 2022 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
3,380 sqft · built 1928 · 0.212 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $450,000Aug 1995 | $20,4102025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
2,290 sqft · built 1928 · 0.255 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $770,000Jan 2016 | $18,7532025 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
4,392 sqft · built 1929 · 0.536 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,100,000Jul 2025 | $27,2342025 | Amount on Record — | 2 Names on Record | Assessor + 3 DocumentsUpdated Jul 2026 |
4,429 sqft · built 1930 · 0.47 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,110,000Feb 2015 | $30,3712025 | Amount on Record Dec 2008 | 1 Name on Record | Assessor + 1 DocumentUpdated Aug 2026 |
3,930 sqft · built 1987 · 0.241 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $650,000Jul 1997 | $24,2562025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |