NOT LISTED FOR SALE

640 Mt Duncan Dr Clayton, CA 94517

Estimated Value: $1,023,000 - $1,116,868

4 Beds
3 Baths
2,177 Sq Ft
$482/Sq Ft Est. Value

Sale Details

Date Sold: October 14, 2025

Last sale price $1,015,000 $466 Per Sq Ft

Est. 3% increase in value since last sale

Current estimated payment $6,768 / mo

8 Days on Market

Highlights

  • Wood Flooring
  • 2 Car Attached Garage
  • Central Heating
  • Mt. Diablo Elementary School Rated A-
  • Wet Bar
  • Wood Fence

About This Home

As of October 2025

Welcome to 640 Mt Duncan Drive, a home that captures the best of Clayton living in the peaceful Dana Hills community. With 4 bedrooms and 3 bathrooms, this residence is designed for both comfort and versatility. On the main level, a full bedroom and bathroom create an ideal retreat for guests or extended family, while the living and dining rooms open to a cozy family room perfect for gatherings. The kitchen shines with stainless steel appliances, freshly painted cabinets, new hardware, and a clean modern touch. Upstairs, the spacious primary suite is joined by two additional bedrooms, each offering generous closet space and natural light. Recent improvementsincluding a new roof and upgraded landscapingadd peace of mind and curb appeal. Outside, the flat, functional backyard invites you to imagine garden beds, play areas, or summer barbecues under the shaded deck. Life in Dana Hills means more than just a homeit's access to a community pool, greenbelt trails, and the sense of safety and tranquility that makes this neighborhood so special.

Last Agent to Sell the Property

Ina Daniliuk

Compass License #01946193 Listed on: 09/17/2025

Compass

Last Buyer's Agent

Ambar Estrella Toledo

Twin Oaks Real Estate INC License #02031803

Twin Oaks Real Estate INC

Home Details

Home Type

  • Single Family

Year Built

  • Built in 1980

Lot Details

  • 9,880 Sq Ft Lot
  • Wood Fence
  • Back Yard Fenced

HOA Fees

  • $82 Monthly HOA Fees

Parking

  • 2 Car Attached Garage
  • Garage Door Opener

Home Design

  • Composition Roof

Interior Spaces

  • 2-Story Property
  • Wet Bar
  • Wood Burning Fireplace
  • Raised Hearth
  • Stone Fireplace
  • Living Room with Fireplace
  • Washer and Dryer Hookup

Kitchen

  • Microwave
  • Dishwasher
  • Disposal

Flooring

  • Wood
  • Linoleum
  • Vinyl

Bedrooms and Bathrooms

  • 4 Bedrooms
  • 3 Full Bathrooms

Utilities

  • Central Heating
  • Internet Available

Community Details

  • Association fees include pool
  • Dana Hills Association

Home Details

Home Type

Single Family

Year Built

Built in 1980

Lot Details

9,880 Sq Ft Lot

HOA Fees

$82 per month

Parking

2

Listing Details

  • Property Type: Residential
  • Stories: 2
  • Year Built: 1980
  • Property Sub Type: Single Family Residence
  • Horses: No
  • Co List Office Mls Id: COMP53
  • Property Attached Yn: No
  • PictureCountPublic: 7
  • BridgeModificationTimestamp: 2025-11-05T05:25:54.363Z
  • Special Features: None

Interior Features

  • Fireplace Features: Living Room, Raised Hearth, Stone, Wood Burning
  • Appliances: Dishwasher, Disposal, Free-Standing Electric Range, Free-Standing Refrigerator, Microwave
  • Flooring: Linoleum, Vinyl, Wood
  • Interior Amenities: Cathedral Ceiling(s), Wet Bar
  • Laundry Features: Hookups Only
  • Window Features: Screens
  • Full Bathrooms: 3
  • Total Bedrooms: 4
  • Fireplaces: 1
  • Total Bedrooms: 9

Exterior Features

  • Exterior Features: Built-In Barbeque
  • Fencing: Back Yard, Wood
  • Patio And Porch Features: Rear Porch
  • Pool Features: Community
  • Road Surface Type: Paved Sidewalk
  • Roof: Composition
  • Home Warranty: No

Garage/Parking

  • Garage Spaces: 2
  • Parking Features: Driveway, Attached, Garage Door Opener, Side By Side, Independent, On Site (Single Family Only)
  • Covered Parking Spaces: 2

Utilities

  • Cooling: Central Air
  • Heating: Central, Fireplace(s)
  • Security Features: Carbon Monoxide Detector(s), Smoke Detector(s)
  • Utilities: Internet Available, Public
  • Water Source: Meter on Site, Public, Water District
  • Heating Yn: Yes

Condo/Co-op/Association

  • Association Fee: 245
  • Association Fee Frequency: Quarterly
  • Association Fee Includes: Pool, Other

Association/Amenities

  • Association Name: Dana Hills

Lot Info

  • Lot Size Acres: 0.2268
  • Lot Size Sq Ft: 9880
  • Lot Size Units: Square Feet
  • Irrigation Water Rights: No

Green Features

Rental Info

  • Pets Allowed: Yes
  • Existing Lease Type: Net

Tax Info

  • Tax Tract: 0.00

Ownership History

Date Name Owned For Owner Type

Purchase Details

Listed on
Sep 17, 2025
Closed on
Oct 7, 2025
Sold by
Wellman-Miner Sheena and Miner Joel
Bought by
Pinheiro Marcus and Pinheiro Kaitlyn
Seller's Agent
Ina Daniliuk
Compass
Buyer's Agent
Ambar Estrella Toledo
Twin Oaks Real Estate INC
List Price
$1,015,000
Sold Price
$1,015,000
Views
25
Current Estimated Value
$1,050,217

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Estimated Appreciation
$35,217
Avg. Annual Appreciation
6.92%
Original Mortgage
$557,000
Outstanding Balance
$555,499
Interest Rate
6.56%
Mortgage Type
New Conventional
Estimated Equity
$494,718

Purchase Details

Listed on
Jul 16, 2021
Closed on
Aug 13, 2021
Sold by
Seitz Timothy J and Seitz Trust
Bought by
Weilman Mirier Sheena and Miner Joel
Seller's Agent
Carol van Vaerenbergh
Compass
Buyer's Agent
Devon Sherak
Compass
List Price
$929,000
Sold Price
$990,000
Premium/Discount to List
$61,000
6.57%

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
0.60%
Original Mortgage
$670,000
Interest Rate
2.9%
Mortgage Type
New Conventional

Purchase Details

Closed on
Jan 26, 2000
Sold by
Seitz Timothy J
Bought by
Seitz Timothy J
Source: Public Records

Range of Values:

--
Value Increase
--
Percent Increase
--
Adjusted for Inflation
Collateral Analytics

Collateral Analytics Collateral Analytics AVMs (Automated Valuation Model) employ a number of statistical approaches combined with neighborhood-specific comparable selection guarantees the most up-to-date and precise valuations.

Not Available

Collateral Analytics does not have data for the current month. Please view the chart for historical values.

ICE

ICE Mortgage Technology ICE Mortgage Technology’s AVM (Automated Valuation Model) is a state-of-the-art online residential property valuation tool that provides a quick and accurate estimate of the value of almost any home in the U.S.

Not Available

ICE Mortgage Technology does not have data for the current month. Please view the chart for historical values.

First American

First American First American Data & Analytics’ next-generation AVM combines unrivaled data assets with a blended ensemble of valuation models to produce highly accurate, reliable valuations you can trust.

Not Available

First American does not have data for the current month. Please view the chart for historical values.

Quantarium

Quantarium Quantarium’s valuation service, repeatedly proven the industry’s most accurate and comprehensive, is supercharged with a self-learning and auto-tuning AI engine that continually becomes smarter and more accurate as it processes daily inputs from the industry’s leading RE data lake.

Not Available

Quantarium does not have data for the current month. Please view the chart for historical values.

Average Value
Not Available
List Price
Sold Price
Create a Home Valuation Report for This Property
The Home Valuation Report is an in-depth analysis detailing your home's value as well as a comparison with similar homes in the area

Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Purchase History

Date Buyer Sale Price Title Company
Pinheiro Marcus $1,015,000 Chicago Title
Weilman Mirier Sheena $990,000 Old Republic Title Company
Seitz Timothy J -- --
Source: Public Records

Mortgage History

Date Status Borrower Loan Amount
Open Pinheiro Marcus $557,000
Previous Owner Weilman Mirier Sheena $670,000
Source: Public Records

Property History

Date Event Price List to Sale Price per Sq Ft Prior Sale
10/14/2025 10/14/25 Sold $1,015,000 0.0% $466 / Sq Ft
09/25/2025 09/25/25 Pending -- -- --
09/17/2025 09/17/25 For Sale $1,015,000 +2.5% $466 / Sq Ft
02/04/2025 02/04/25 Off Market $990,000 -- --
08/20/2021 08/20/21 Sold $990,000 +6.6% $455 / Sq Ft View Prior Sale
07/28/2021 07/28/21 Pending -- -- --
07/16/2021 07/16/21 For Sale $929,000 -- $427 / Sq Ft
Source: San Francisco Association of REALTORS®

Tax History

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $12,945 $1,050,595 $530,604 $519,991
2024 $12,413 $1,029,996 $520,200 $509,796
2023 $12,413 $1,009,800 $510,000 $499,800
2022 $12,264 $990,000 $500,000 $490,000
2021 $1,844 $216,397 $82,039 $134,358
2019 $1,827 $209,980 $79,606 $130,374
2018 $1,768 $205,864 $78,046 $127,818
2017 $1,705 $201,828 $76,516 $125,312
2016 $1,632 $197,871 $75,016 $122,855
2015 $1,564 $194,900 $73,890 $121,010
2014 $1,489 $191,083 $72,443 $118,640
Source: Public Records

Agents Affiliated with this Home

  • I

    Seller's Agent in 2025

    Ina Daniliuk

    Compass

    (510) 254-3831

    2 in this area

    40 Total Sales

    Ina Daniliuk
    Section Image

  • A

    Buyer's Agent in 2025

    Ambar Estrella Toledo

    Twin Oaks Real Estate INC

    Section Image
  • Carol van Vaerenbergh

    Seller's Agent in 2021

    Carol van Vaerenbergh

    Compass

    (925) 683-2568

    8 in this area

    15 Total Sales

    Carol van Vaerenbergh
    Section Image
  • Devon Sherak

    Buyer's Agent in 2021

    Devon Sherak

    Compass

    (925) 282-0210

    1 in this area

    34 Total Sales

    Devon Sherak
    Section Image
See All Agents

Map

Source: San Francisco Association of REALTORS®

MLS Number: 425074416

San Francisco Association of REALTORS®

APN: 119-490-050-0

California Contra Costa County Clayton 94517

640 Mt Duncan Dr, Clayton, CA

Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.

San Francisco Association of REALTORS® IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Information is deemed reliable but not guaranteed.

Nearby Homes
Your Personal Tour Guide

Ask me questions while you tour the home.