Marion Ave, Mill Valley, CA Property Records

Marin County property records for 65 addresses on Marion Ave, Mill Valley, CA · Last verified August 2026

Marion Ave Highlights

Properties 65
Median Sale Price $1,960,000
Deeds and Mortgages on File 119
Median Price per Sqft $981
Owner Occupied 88%
Median Annual Tax Bill $17,714
Median Year Built 1957
Median Ownership Tenure 9 years

Properties on Marion Ave

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

6 Marion Ave

2 bd · 2 ba · 2,142 sqft · 0.655 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,4062025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

11 Marion Ave

2,874 sqft · Built 1906 · 0.206 acres

Last Sale Tax Bill Prior Sale Owner Records
$11,6312025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

16 Marion Ave

4 bd · 2 ba · 3,166 sqft · 0.436 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$16,2572025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

21 Marion Ave

5 bd · 3.5 ba · 2,842 sqft · 0.096 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$795,000May 2000 $17,7142025 Amount on Record Nov 1995 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

25 Marion Ave

3 bd · 1.5 ba · 1,529 sqft · 0.172 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,500,000Jul 2020 $25,9162025 Amount on Record Jan 2007 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

48 Marion Ave

1 bd · 1.5 ba · 854 sqft · 0.138 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,210,000Nov 2021 $17,9232025 —Nov 2021 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2026

52 Marion Ave

3 bd · 3 ba · 1,786 sqft · 0.412 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,075,000Aug 2012 $19,2002025 Amount on Record Jun 2001 2 Names on Record AssessorUpdated Jul 2026

54 Marion Ave

4 bd · 2.5 ba · 1,984 sqft · 0.439 acres

Last Sale Tax Bill Prior Sale Owner Records
—May 2010 $4,7122025 —Aug 2008 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

115 Marion Ave

3 bd · 3.5 ba · 3,060 sqft · 0.236 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$15,9262025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

122 Marion Ave

4 bd · 3 ba · 2,049 sqft · 0.29 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$1,030,000Mar 2012 $18,2792025 Amount on Record Oct 2011 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

125 Marion Ave

5 bd · 4.5 ba · 3,822 sqft · 0.353 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,350,000May 2024 $65,5862025 Amount on Record Mar 2021 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

126 Marion Ave

4 bd · 3 ba · 2,859 sqft · 0.307 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,335,000Jan 2011 $30,5972025 Amount on Record Jul 2007 2 Names on Record Owner Occupied AssessorUpdated Aug 2026

132 Marion Ave

3 bd · 3 ba · 2,208 sqft · 0.383 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,417,000Dec 2020 $20,8742025 Amount on Record Sep 2014 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

136 Marion Ave

4 bd · 4.5 ba · 2,973 sqft · 0.242 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,250,000Jun 2017 $33,5242025 Amount on Record Jun 2008 2 Names on Record Owner Occupied Assessor + 5 DocumentsUpdated Jul 2026

145 Marion Ave

5 bd · 3.5 ba · 4,004 sqft · 0.806 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,310,000Mar 2007 $47,1402025 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2026

153 Marion Ave

3 bd · 2 ba · 2,129 sqft · 0.146 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,230,000Nov 2012 $18,7212025 Amount on Record Nov 2004 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

154 Marion Ave

3 bd · 2 ba · 1,232 sqft · 0.482 acres

Last Sale Tax Bill Prior Sale Owner Records
$662,500Jun 2003 $12,2372025 —Dec 2016 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

157 Marion Ave

1 bd · 1 ba · 899 sqft · 0.173 acres

Last Sale Tax Bill Prior Sale Owner Records
—Oct 2002 $6,0752025 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

165 Marion Ave

6 bd · 3 ba · 2,515 sqft · 0.232 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,350,000Dec 2019 $20,6992025 Amount on Record Jul 1995 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

171 Marion Ave

4 bd · 2 ba · 2,670 sqft · 0.404 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,5182025 —Sep 2022 2 Names on Record Owner Occupied Assessor + 7 DocumentsUpdated Aug 2026

178 Marion Ave

3 bd · 2 ba · 1,714 sqft · 0.371 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$1,480,000Jun 2015 $24,4002025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

185 Marion Ave

4 bd · 2.5 ba · 2,152 sqft · 0.326 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,3012025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

186 Marion Ave

4 bd · 4 ba · 2,237 sqft · 0.407 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,1732025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

189 Marion Ave

3 bd · 2 ba · 1,861 sqft · 0.218 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,650,000Jan 2025 $4,6212025 —Oct 2024 2 Names on Record Owner Occupied AssessorUpdated Aug 2026

190 Marion Ave

3 bd · 2.5 ba · 2,127 sqft · 0.649 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,4872025 —Jul 2014 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

195 Marion Ave

2 bd · 1 ba · 1,418 sqft · 0.259 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,1602025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

201 Marion Ave

4 bd · 2 ba · 2,106 sqft · 0.239 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$450,000Mar 2019 $8,2102025 Amount on Record Oct 1997 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

209 Marion Ave

3 bd · 2.5 ba · 2,575 sqft · 0.337 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,400,000Jun 2006 $29,0682025 —Aug 2007 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

211 Marion Ave

4 bd · 2 ba · 1,918 sqft · 0.234 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$7,2752025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

220 Marion Ave

2 bd · 2 ba · 1,321 sqft · 0.38 acres

Last Sale Tax Bill Prior Sale Owner Records
$320,000Jun 1990 $8,3002025 —Apr 2022 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2026

221 Marion Ave

4 bd · 3.5 ba · 3,807 sqft · 0.587 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$3,725,000Oct 2021 $48,9092025 Amount on Record Oct 2012 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Aug 2026

228 Marion Ave

3 bd · 2 ba · 1,241 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
—Jun 1987 $8,9212025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

243 Marion Ave

4 bd · 2 ba · 2,552 sqft · 0.131 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,0892025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

250 Marion Ave

0.126 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,2492025 2 Names on Record AssessorUpdated Jul 2026

251 Marion Ave

4 bd · 2 ba · 2,630 sqft · 1.03 acres

Last Sale Tax Bill Prior Sale Owner Records
$234,000Jun 2013 $10,0522025 —Jul 2013 1 Name on Record AssessorUpdated Aug 2026

260 Marion Ave

7 bd · 4 ba · 3,258 sqft · 0.829 acres

Last Sale Tax Bill Prior Sale Owner Records
—Apr 1994 $6,1532025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

284 1/2 Marion Ave

0.209 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,525,000Aug 2021 $8,1492025 2 Names on Record Assessor + 1 DocumentUpdated Jul 2026

284 Marion Ave

3 bd · 2 ba · 1,499 sqft · 0.13 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$840,000Oct 2000 $18,6172025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

286 Marion Ave

5 bd · 5.5 ba · 2,811 sqft · 0.252 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$787,500May 2001 $18,6912025 Amount on Record Oct 1997 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

290 Marion Ave

3 bd · 2 ba · 1,735 sqft · 0.345 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$850,000May 2023 $10,3912025 —Sep 2010 2 Names on Record Assessor + 1 DocumentUpdated Jul 2026

291 Marion Ave

2 bd · 1 ba · 1,104 sqft · 0.121 acres

Last Sale Tax Bill Prior Sale Owner Records
$975,000Jun 2019 $17,9032025 —Mar 2017 1 Name on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

300 Marion Ave

2 bd · 1.5 ba · 1,236 sqft · 0.121 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,360,000Jun 2026 $19,3872025 Amount on Record Jun 2022 1 Name on Record Owner Occupied Assessor + 5 DocumentsUpdated Jul 2026

305 Marion Ave

3 bd · 2 ba · 1,596 sqft · 0.126 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,450,000Jan 2021 $21,5912025 Amount on Record May 2019 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

319 Marion Ave

2 bd · 3.5 ba · 1,738 sqft · 0.247 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,600,000Sep 2021 $23,3892025 Amount on Record Nov 2004 2 Names on Record Owner Occupied Assessor + 4 DocumentsUpdated Aug 2026

333 Marion Ave

3 bd · 2 ba · 1,908 sqft · 0.218 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$6,4122025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

337 Marion Ave

3 bd · 2.5 ba · 2,454 sqft · 0.156 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,900,000May 2018 $28,3272025 Amount on Record Jun 1997 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

340 Marion Ave

3 bd · 2 ba · 1,856 sqft · 0.187 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,300,000Feb 2022 $35,1452025 Amount on Record Jul 2021 2 Names on Record Owner Occupied Assessor + 5 DocumentsUpdated Aug 2026

359 Marion Ave

3 bd · 3.5 ba · 2,577 sqft · 0.127 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,520,000Aug 2013 $25,7332025 Amount on Record Jul 2009 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

360 Marion Ave

3 bd · 3 ba · 2,570 sqft · 0.398 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$13,4882025 —Mar 2005 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

363 Marion Ave

4 bd · 2.5 ba · 2,676 sqft · 0.128 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,900,000Dec 2025 $12,8432025 —Dec 2025 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

369 Marion Ave

4 bd · 3 ba · 3,106 sqft · 0.252 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$14,1952025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

370 Marion Ave

3 bd · 2.5 ba · 2,854 sqft · 0.254 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,032,000Dec 2009 $19,7562025 Amount on Record Jul 2009 2 Names on Record Assessor + 2 DocumentsUpdated Jul 2026

390 Marion Ave

3 bd · 2 ba · 2,095 sqft · 0.5 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,305,000Feb 2025 $21,0802025 Amount on Record May 2017 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

395 Marion Ave

3 bd · 2.5 ba · 2,365 sqft · 0.445 acres · Garage · Pool

Last Sale Tax Bill Prior Sale Owner Records
$1,960,000Nov 2020 $27,7722025 Amount on Record Jun 2007 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

399 Marion Ave

3 bd · 2.5 ba · 2,054 sqft · 0.259 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,500,000Jun 2026 $17,6472025 Amount on Record Jul 2011 1 Name on Record Owner Occupied Assessor + 5 DocumentsUpdated Aug 2026

400 Marion Ave

3 bd · 2 ba · 1,808 sqft · 0.293 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,1772025 —Dec 2017 1 Name on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

401 Marion Ave

3 bd · 2 ba · 1,916 sqft · 0.212 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,625,000May 2018 $26,2382025 2 Names on Record Owner Occupied Assessor + 5 DocumentsUpdated Jul 2026

405 Marion Ave

5 bd · 2.5 ba · 2,476 sqft · 0.544 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,650,000Aug 2020 $41,9342025 Amount on Record Aug 2012 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Aug 2026

421 Marion Ave

5 bd · 4 ba · 3,683 sqft · 0.695 acres · Pool

Last Sale Tax Bill Prior Sale Owner Records
$19,5982025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

422 Marion Ave

2 bd · 3 ba · 2,276 sqft · 0.324 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$815,000Aug 1997 $19,0202025 —Aug 1997 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Aug 2026

426 Marion Ave

4 bd · 3 ba · 2,847 sqft · 0.208 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$558,000Mar 1996 $17,5122025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

430 Marion Ave

2 bd · 2 ba · 1,223 sqft · 0.093 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$762,000May 2011 $15,2032025 Amount on Record Jul 2007 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

431 Marion Ave

4 bd · 4.5 ba · 2,980 sqft · 0.511 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$3,100,000Dec 2015 $45,2972025 —Jun 2004 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

435 Marion Ave

3 bd · 2.5 ba · 2,528 sqft · 0.268 acres · Pool

Last Sale Tax Bill Prior Sale Owner Records
$2,925,000Jan 2024 $37,4482025 Amount on Record Jul 2023 1 Name on Record Assessor + 6 DocumentsUpdated Jul 2026

439 Marion Ave

3 bd · 3 ba · 2,801 sqft · 0.259 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$760,000Jun 1999 $17,3682025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

Wildfire Risk on Marion Ave

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

Wildfire RiskLow
this street's cells rank at the 35th percentile of exposed land nationally · 20th in California
Wildfire LikelihoodLow — about 1 in 2,198 per year
ExposureDirect
4 of 6 cells directly exposed · 6 adjoin burnable vegetation

Property Records in Nearby Streets