Princeton Ave, Billings, MT Property Records

Yellowstone County property records for 85 addresses on Princeton Ave, Billings, MT · Last verified October 2026

Princeton Ave Highlights

Properties 85
Median Sale Price $318,168
Deeds and Mortgages on File 81
Median Price per Sqft $181
Owner Occupied 69%
Median Annual Tax Bill $2,560
Median Year Built 1948
Median Ownership Tenure 9 years

Properties on Princeton Ave

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

903 Princeton Ave

5 bd · 3 ba · 3,228 sqft · built 1952 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$504,539Jul 2025 $3,7822025 —Oct 2016 2 Owners on Record AssessorUpdated Sep 2026

905 Princeton Ave

4 bd · 2.5 ba · 1,432 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$251,625Apr 2026 $2,0572025 Owner on Record Assessor + 1 DocumentUpdated Sep 2026

906 Princeton Ave

4 bd · 2 ba · 2,075 sqft · built 1946 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,3572025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

910 Princeton Ave

3 bd · 1.5 ba · 1,611 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$410,258Mar 2024 $2,1252025 Amount on Record Mar 2021 2 Owners on Record Owner Occupied Assessor + 5 DocumentsUpdated Sep 2026

911 Princeton Ave

3 bd · 2 ba · 1,770 sqft · built 1949 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$357,385Sep 2026 $2,3262025 Amount on Record Nov 2017 2 Owners on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

914 Princeton Ave

4 bd · 2 ba · 2,115 sqft · built 1948 · 0.2 acres

Last Sale Tax Bill Prior Sale Owner Records
$384,822Jul 2026 $2,2582025 Amount on Record Sep 2016 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

917 Princeton Ave

3 bd · 1 ba · 1,157 sqft · built 1950 · 0.162 acres

Last Sale Tax Bill Prior Sale Owner Records
$127,500Aug 2014 $1,7912025 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

918 Princeton Ave

3 bd · 2 ba · 2,181 sqft · built 1947 · 0.2 acres

Last Sale Tax Bill Prior Sale Owner Records
$318,168Jul 2026 $2,2292025 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

921 Princeton Ave

5 bd · 1.5 ba · 1,802 sqft · built 1950 · 0.158 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,9722025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

924 Princeton Ave

3 bd · 1.5 ba · 1,411 sqft · built 1951 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$260,700Apr 2018 $2,0302025 2 Owners on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

925 Princeton Ave

4 bd · 1.5 ba · 1,899 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—Aug 2025 $2,0682025 Amount on Record Nov 2015 Owner on Record Owner Occupied AssessorUpdated Sep 2026

928 Princeton Ave

3 bd · 2 ba · 1,810 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$220,000Mar 2017 $2,1822025 Amount on Record Jun 2014 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

929 Princeton Ave

4 bd · 2 ba · 1,694 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$418,285May 2022 $2,2252025 Amount on Record Apr 2013 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

930 Princeton Ave

3 bd · 1 ba · 1,244 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,8492025 Owner on Record AssessorUpdated Sep 2026

931 Princeton Ave

3 bd · 2 ba · 2,234 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$126,900Jan 2007 $2,1882025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

934 Princeton Ave

3 bd · 1 ba · 1,124 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$5942025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

937 Princeton Ave

3 bd · 2 ba · 1,532 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$106,300Sep 2006 $2,0702025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

938 Princeton Ave

4 bd · 2 ba · 1,694 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,0772025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

941 Princeton Ave

3 bd · 2 ba · 1,537 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$102,800Dec 2021 $2,2522025 Owner on Record Assessor + 1 DocumentUpdated Sep 2026

944 Princeton Ave

4 bd · 2 ba · 1,663 sqft · built 1942 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$132,700Mar 2015 $2,0742025 2 Owners on Record AssessorUpdated Sep 2026

945 Princeton Ave

5 bd · 2.5 ba · 2,547 sqft · built 1954 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,4442025 2 Owners on Record Owner Occupied Assessor + 4 DocumentsUpdated Sep 2026

946 Princeton Ave

4 bd · 3 ba · 2,044 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$175,000Aug 2008 $2,3172025 2 Owners on Record Assessor + 1 DocumentUpdated Sep 2026

1003 Princeton Ave

2 bd · 2 ba · 1,093 sqft · built 1952 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$182,609Oct 2014 $2,2062025 Amount on Record Apr 2010 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1004 Princeton Ave

4 bd · 2 ba · 1,812 sqft · built 1945 · 0.159 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,1262025 Owner on Record Assessor + 3 DocumentsUpdated Sep 2026

1008 Princeton Ave

4 bd · 2 ba · 1,763 sqft · built 1950 · 0.179 acres

Last Sale Tax Bill Prior Sale Owner Records
$163,100Nov 2009 $2,0962025 2 Owners on Record AssessorUpdated Sep 2026

1009 Princeton Ave

3 bd · 2 ba · 1,554 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,9992025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

1010 Princeton Ave

3 bd · 1.5 ba · 2,254 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$303,560Jun 2025 $2,4532025 Amount on Record Jul 2012 Owner on Record Owner Occupied AssessorUpdated Sep 2026

1011 Princeton Ave

2 bd · 1 ba · 1,184 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—Sep 2019 $2,2952025 —Mar 2010 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1016 Princeton Ave

5 bd · 2 ba · 2,487 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—Mar 2025 $2,5362025 Amount on Record Dec 2019 Owner on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

1017 Princeton Ave

4 bd · 2 ba · 2,194 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$150,100Feb 2013 $2,2842025 Amount on Record May 2012 2 Owners on Record Assessor + 1 DocumentUpdated Sep 2026

1020 Princeton Ave

3 bd · 2 ba · 2,308 sqft · built 1951 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,2642025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1021 Princeton Ave

4 bd · 2 ba · 1,467 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$166,100Jun 2005 $2,0762025 Owner on Record AssessorUpdated Sep 2026

1023 Princeton Ave

3 bd · 2 ba · 1,455 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,9602025 2 Owners on Record AssessorUpdated Oct 2026

1024 Princeton Ave

4 bd · 2 ba · 2,164 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$100,000May 2012 $2,2922025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

1025 Princeton Ave

4 bd · 2 ba · 1,710 sqft · built 1952 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$156,700May 2015 $2,1322025 Amount on Record Feb 2007 2 Owners on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

1027 Princeton Ave

3 bd · 2 ba · 2,003 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$299,250Mar 2026 $2,3352025 Amount on Record Jun 2021 Owner on Record Owner Occupied Assessor + 3 DocumentsUpdated Sep 2026

1028 Princeton Ave

4 bd · 2 ba · 2,339 sqft · built 1951 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$489,333Apr 2026 $3,1472025 Amount on Record Jul 2011 2 Owners on Record Owner Occupied Assessor + 5 DocumentsUpdated Sep 2026

1034 Princeton Ave

4 bd · 2.5 ba · 2,364 sqft · built 1952 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,6862025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1035 Princeton Ave

3 bd · 2 ba · 2,058 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$296,940Oct 2026 $2,0792026 Owner on Record Owner Occupied AssessorUpdated Oct 2026

1039 Princeton Ave

3 bd · 2 ba · 1,617 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$148,500Aug 2013 $2,1512025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1040 Princeton Ave

6 bd · 2 ba · 3,643 sqft · built 1950 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$106,300Feb 2012 $2,8412025 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1044 Princeton Ave

3 bd · 2 ba · 2,100 sqft · built 1950 · 0.12 acres

Last Sale Tax Bill Prior Sale Owner Records
—Oct 2017 $1,9042025 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1045 Princeton Ave

3 bd · 1 ba · 1,479 sqft · built 1949 · 0.12 acres

Last Sale Tax Bill Prior Sale Owner Records
—Feb 2023 $1,7982025 Owner on Record Assessor + 2 DocumentsUpdated Sep 2026

1103 Princeton Ave

3 bd · 1 ba · 2,724 sqft · built 1947 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,8542025 Owner on Record Assessor + 1 DocumentUpdated Sep 2026

1104 Princeton Ave

4 bd · 2 ba · 2,085 sqft · built 1950 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,4412025 2 Owners on Record Owner Occupied Assessor + 3 DocumentsUpdated Sep 2026

1107 Princeton Ave

3 bd · 2 ba · 1,568 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$293,020Dec 2022 $2,0992025 Amount on Record Jun 2011 Owner on Record Owner Occupied Assessor + 5 DocumentsUpdated Sep 2026

1108 Princeton Ave

3 bd · 1 ba · 1,584 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$357,013Jul 2025 $2,0752025 Amount on Record May 2020 2 Owners on Record Owner Occupied Assessor + 4 DocumentsUpdated Sep 2026

1111 Princeton Ave

5 bd · 2 ba · 1,908 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$175,000Mar 2016 $1,9632025 2 Owners on Record AssessorUpdated Oct 2026

1112 Princeton Ave

4 bd · 1 ba · 2,108 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—Oct 2024 $2,0162025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1116 Princeton Ave

2 bd · 1 ba · 1,581 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$151,200Nov 2016 $1,9292025 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1117 Princeton Ave

2 bd · 2 ba · 1,273 sqft · built 1947 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$279,100Feb 2021 $2,3372025 Amount on Record Apr 2010 2 Owners on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

1120 Princeton Ave

4 bd · 2 ba · 1,871 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,1272025 2 Owners on Record AssessorUpdated Sep 2026

1123 Princeton Ave

4 bd · 1.5 ba · 1,554 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,1602025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1126 Princeton Ave

2 bd · 1 ba · 1,199 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$107,800Oct 2013 $1,7842025 —Mar 2010 Owner on Record AssessorUpdated Sep 2026

1127 Princeton Ave

3 bd · 1 ba · 1,318 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$165,700Oct 2009 $1,9072025 Amount on Record Dec 2008 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1128 Princeton Ave

4 bd · 2 ba · 2,132 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$134,100Nov 2010 $2,0482025 Amount on Record Sep 2010 Owner on Record AssessorUpdated Sep 2026

1130 Princeton Ave

4 bd · 1 ba · 1,134 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,0122025 2 Owners on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

1131 Princeton Ave

3 bd · 2 ba · 1,804 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,0742025 Owner on Record AssessorUpdated Sep 2026

1134 Princeton Ave

2 bd · 1 ba · 988 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$102,000Nov 2010 $1,5692025 Owner on Record Owner Occupied AssessorUpdated Oct 2026

1135 Princeton Ave

5 bd · 2 ba · 2,291 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$498,650Sep 2025 $2,4972025 Amount on Record Apr 2024 2 Owners on Record Assessor + 1 DocumentUpdated Sep 2026

1139 Princeton Ave

3 bd · 2 ba · 2,033 sqft · built 1952 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—Dec 2007 $2,0962025 Owner on Record Owner Occupied AssessorUpdated Oct 2026

1142 Princeton Ave

3 bd · 2 ba · 1,406 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,9922025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1143 Princeton Ave

4 bd · 2 ba · 1,573 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$106,300May 2012 $2,0612025 2 Owners on Record Assessor + 2 DocumentsUpdated Sep 2026

1145 Princeton Ave

3 bd · 2 ba · 1,961 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—Jul 2007 $1,5762025 Owner on Record Owner Occupied AssessorUpdated Sep 2026

1146 Princeton Ave

3 bd · 2 ba · 1,927 sqft · built 1956 · 0.13 acres

Last Sale Tax Bill Prior Sale Owner Records
$187,500Aug 2020 $2,1432025 Amount on Record Feb 2010 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1202 Princeton Ave

3 bd · 2 ba · 1,829 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$289,100Aug 2020 $2,1282025 Amount on Record Apr 2014 Owner on Record Assessor + 2 DocumentsUpdated Sep 2026

1203 Princeton Ave

2 bd · 1.5 ba · 1,232 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$159,500Sep 2013 $1,9582025 Owner on Record Assessor + 1 DocumentUpdated Sep 2026

1206 Princeton Ave

3 bd · 2 ba · 1,930 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$140,500Nov 2005 $2,2182025 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1207 Princeton Ave

4 bd · 2.5 ba · 2,000 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$130,000Jun 2011 $2,1772025 —Feb 2011 Owner on Record Owner Occupied AssessorUpdated Sep 2026

1210 Princeton Ave

4 bd · 1 ba · 1,282 sqft · built 1949 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,9912025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1211 Princeton Ave

2 bd · 1 ba · 1,018 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—Apr 2021 $1,8682025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1215 Princeton Ave

4 bd · 2 ba · 2,032 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$230,000Mar 2020 $2,1042025 —Nov 2009 2 Owners on Record Owner Occupied Assessor + 2 DocumentsUpdated Sep 2026

1216 Princeton Ave

4 bd · 2 ba · 1,506 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$319,200Jun 2024 $2,0712025 Amount on Record Mar 2011 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1219 Princeton Ave

4 bd · 2 ba · 1,807 sqft · built 1950 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$93,800Sep 2012 $2,0552025 2 Owners on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1220 Princeton Ave

3 bd · 1.5 ba · 1,827 sqft · built 1947 · 0.241 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,2992025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1223 Princeton Ave

4 bd · 2 ba · 1,554 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,2122025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1224 Princeton Ave

3 bd · 2 ba · 1,726 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,4892025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1225 Princeton Ave

4 bd · 2 ba · 2,003 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$156,000Dec 2010 $2,1952025 Amount on Record Feb 2007 Owner on Record Owner Occupied AssessorUpdated Sep 2026

1227 Princeton Ave

3 bd · 2 ba · 1,844 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$151,000Oct 2011 $2,0242025 2 Owners on Record Assessor + 1 DocumentUpdated Sep 2026

1230 Princeton Ave

5 bd · 2.5 ba · 2,208 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$428,326Feb 2023 $2,1892025 Amount on Record Jul 2016 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1233 Princeton Ave

4 bd · 4 ba · 2,760 sqft · built 1948 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,8132025 Owner on Record AssessorUpdated Sep 2026

1234 Princeton Ave

3 bd · 3 ba · 1,930 sqft · built 1997 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,3932025 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

1237 Princeton Ave

3 bd · 2 ba · 1,700 sqft · built 1955 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,1592025 Owner on Record Owner Occupied Assessor + 1 DocumentUpdated Sep 2026

1238 Princeton Ave

4 bd · 2.5 ba · 1,695 sqft · built 1946 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
—May 2026 $2,2652025 Amount on Record Oct 2020 2 Owners on Record Assessor + 4 DocumentsUpdated Oct 2026

1242 Princeton Ave

2 bd · 1 ba · 1,224 sqft · built 1947 · 0.16 acres

Last Sale Tax Bill Prior Sale Owner Records
$174,000Apr 2015 $2,0382025 Amount on Record Dec 2010 2 Owners on Record Owner Occupied AssessorUpdated Sep 2026

Property Records in Nearby Streets