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640 Old Mill Road

640 Old Mill Road, San Marino, CA 91108
House in San Marino
Local assessors in San Marino, CA have categorized 640 Old Mill Road as a type of property. The home was built in 1929 and is 97 years old. The property's lot size has been calculated to be 7,883 square feet. Now, let's dive a bit deeper into the details surrounding the home on the property. There are 12 rooms in the home. Of these, 4 have been legally categorized as bedrooms. For more details, please view your local government regulations on what counts as a legal bedroom. As for the restroom situation, there are 3 full bathrooms. There are also 3 partial bathrooms. If we look only at the heated or air conditioned part of the building, then 640 Old Mill Road has a total of 2,980 sqft of living area. Note that this number does not include the square footage of the garage, basement, and/or porch into its calculations.

Curious to learn more about the home? Our team of data engineers have sourced the most up-to-date information from the local assessors office to share with you. In addition, there is a on the property. Perfect for those who want to host pool parties over the summer. It might sound scary but did you know that buildings can move depending on the weather? Both hot and cold weather can have severe impact on the longevity of your home structure depending on how much your home moves. Hence why architects pay a lot of attention to the type of control joints used in the construction process. Just so you know, this home was built with control joints. Not only do we know the type, but we also know that the assessors have graded the quality of these control joints with a letter grade - . The home's is the primary heating source. Here at RealtyHop, we've focused a lot of our efforts into gathering up-to-date and accurate data for our users. Based on our sources, 640 Old Mill Road was last sold in Jun 2, 1995 for $485,000. According to our calculations, that's $162.75 per sqft. Current property owners are expected to pay $875,421 in taxes per year. The property on 640 Old Mill Road was last assessed in 2023. As a result of that assessment, the total value of the property was placed at $774,408. To break that down further, the land itself was valued at $463,055. While improvements to the property were assessed at a total of $311,353. Based on our records, the total assessed value for this property has been marked as more than the total market value as of this moment. Which is pretty atypical. Are you already in the process of closing on a property and have signed a purchase agreement? You may want to consider locking in your current mortgage rate if interest rates have been rising or seem volatile. This is what's known in the market as a mortgage rate lock (aka rate protection). However, be sure to evaluate your situation carefully before you do so. There may be certain costs associated with taking this action and you'll want to time the start of your perfectly!This property is not listed for sale at this point in time but RealtyHop is constantly updating our inventory of available sales listings in real time. Don't want to miss out on this property? You can save the listing to your favorites by signing up for a RealtyHop account or you can check back frequently for updates.

1 Past Sales

Date Unit Beds Baths Sqft Price Closed Listed By
20260727
07/27/2026
4 Bed
3 Bath
2980 ft²
$2,849,000
bedrooms
4 Bed
bathrooms
3 Bath
square feet
2980 ft²
$2,675,000 -6.11%
10/13/2026
Colleen Santino
Berkshire Hathaway Home Servic


Building Info

Overview

    General

  • Year Built: 1929
  • Effective Year Built: 1929
  • Building Count: 1
  • Total Rooms: 12
  • Bedroom Count: 4
  • Bathroom Count: 3
  • Full Bathrooms: 3
  • Partial Bathrooms: 3
  • Building Condition: 0
  • Building Quality: 1
  • Construction Type: 17
  • Building Style: 0
  • Exterior Walls Type: 0
  • Interior Walls Type: 0
  • Roof Shape Type: 0
  • Roof Cover Type: 0
  • Living Units: 1
  • Floor Cover: 0
  • Basement Type: 0
  • Basement Area: 0
  • Garage Type: 0
  • Parking Space Count: 0
  • Patio Type: 0
  • Porch Type: 0
  • Pool Type: 9

    Dimensions

  • Lot Size Square Feet: 7,883
  • Total Building Area: 2,980
  • Building Area: 2,980
  • Building Area Measurement: L

    Heating and Cooling

  • Air Conditioning: 0
  • Heating: 6
  • Heated Square Feet: 2,980
  • Heating Fuel Type: 0

    Utilities

  • Sewer System: 0
  • Water Service: 0

Building

  • Building Type: 0
  • Property Class: R
  • Subdivision: 9864
  • Land Acres: 0000000181
  • Standard Land Use Code: 1001
  • County Land Use Code: 0104
  • Legal Description 1: TR=9864 LOT 23

Neighborhood

  • School District Name: Pasadena Unified School District
  • Census Tract: 464000

Zoning

  • Zoning: PSR4

Geography

  • Assessors Map Reference: 37-B1
  • Subdivision Tract Number: 9864
  • Parcel: 5325-008-033
  • Lot: 23
  • Municipality: EAST /SN MRNO N HUNTG
  • Latitude: 34.1183
  • Longitude: -118.137

    Address

  • Full Address: 640 Old Mill Rd
  • Address - House Number: 640
  • Address - Street Name: Old Mill
  • Address - Suffix Type: Rd
  • State: CA
  • City Name: San Marino
  • Carrier Code: C001
  • 4-Digit Zip Code: 1736
  • Zip Code: 91108

Valuation

    Tax

  • Tax Year: 2022
  • Tax Amount: $875,421
  • Tax Rate Code Area: 07-500

    Appraisal Valuation

  • Standard Deviation: 0.2272
  • Valuation Date: Oct 25, 2023
  • Confidence Score: 68
  • Final Value: 2,319,588
  • High Value: 2,846,724
  • Low Value: 1,792,451

    Assessments Valuation

  • Assessed Year: 2023
  • Assessed Total Value: $774,408
  • Assessed Land Value: $463,055
  • Assessed Improvements Value: $311,353

    Exemptions

  • Homeowner Exemption: Yes

    Sales

  • Current Sale Contract Date: Jun 02, 1995
  • Current Sale Recording Date: Jul 17, 1995
  • Current Sale Price:
  • Current Sale Document Type: 39
  • Current Sale Input Document Number: 95-1150417

    Financing

  • First Mortgage Financing Type: VAR
Data used for valuation calculations is provided by RealtyHop, and other third party sources

About San Marino



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Frequently Asked Questions

What neighborhood is 640 Old Mill Road located in?
The 640 Old Mill Road is a house located in the neighborhood of San Marino in San Marino, San Marino.
What is the average sales price for listings in 640 Old Mill Road?
The average sales price for units in 640 Old Mill Road is $0 currently.