3217 Upper Lock Ave, Belmont, CA 94002
Property image
Property image
OFF MARKET

3217 Upper Lock Ave
Belmont, CA 94002

Plateau-Skymont
  • 3 Beds
  • 4 Baths
  • 2,570 sqft

$2,930,400

Trulia Estimate
as of Aug 15, 2026
Est. Refi. Payment $17,459/mo*
Refinance Your Home

$2,930,400

Trulia Estimate
as of Aug 15, 2026
Est. Refi. Payment $17,459/mo*
Refinance Your Home
3 Beds
4 Baths
2,570 sqft

Home Value

Trulia Estimate
$2.93M
Since last month
Decreased$40K (-1.3%)
Since last year
Decreased$13K (-0.4%)
Since last sale
Increased$477K (+19.3%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +64% in the last 10 years
MonthEstimated value
2026
August 2026$2.94M
July 2026$2.98M
June 2026$2.98M
May 2026$3.02M
April 2026$3.03M
March 2026$3.07M
February 2026$3.03M
January 2026$2.84M
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
3225 Upper Lock Ave, Belmont, CA
0.03
Single-Family Home
$2,785,000
10/09/25
3
2.5
2,270
2920 San Juan Blvd, Belmont, CA
0.21
Single-Family Home
$2,660,000
10/24/25
4
3
2,520
2618 Belmont Canyon Rd, Belmont, CA
0.21
Single-Family Home
$3,100,000
09/04/25
4
3
2,926
2937 San Juan Blvd, Belmont, CA
0.14
Single-Family Home
$2,100,000
04/28/26
3
2
2,050
3860 W Naughton Ave, Belmont, CA
0.38
Single-Family Home
$3,200,000
04/09/26
4
3.5
2,620
3806 Naughton Ave, Belmont, CA
0.21
Single-Family Home
$3,800,000
12/12/25
5
4
2,806
3513 Hillcrest Dr, Belmont, CA
0.22
Single-Family Home
$1,940,000
06/24/26
3
2.5
1,760
3208 Upper Lock Ave, Belmont, CA
0.07
Single-Family Home
$2,100,000
03/24/26
4
2
2,210
3412 Plateau Dr, Belmont, CA
0.22
Single-Family Home
$3,100,000
06/11/26
4
3
2,180
2827 San Ardo Way, Belmont, CA
0.24
Single-Family Home
$2,471,000
06/17/26
3
2.5
1,600

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
3225 Upper Lock Ave, Belmont, CA 94002
0.03
$2,895,300
3
2.5
2,270
Off Market
3300 Plateau Dr, Belmont, CA 94002
0.04
$2,729,300
3
2
1,710
Off Market
3208 Upper Lock Ave, Belmont, CA 94002
0.07
$2,100,000
4
2
2,210
Recently Sold
3311 Plateau Dr, Belmont, CA 94002
0.06
$1,980,000
3
1
1,200
Recently Sold
Marburger Ave, Belmont, CA 94002
0.11
$225,000
-
-
-
For Sale
2663 Belmont Canyon Rd, Belmont, CA 94002
0.12
$2,478,500
4
2
2,140
Off Market
2937 San Juan Blvd, Belmont, CA 94002
0.14
$2,100,000
3
2
2,050
Recently Sold
2941 San Juan Blvd, Belmont, CA 94002
0.14
$3,011,700
3
3
3,120
Off Market
3602 Reposo Way, Belmont, CA 94002
0.12
$3,566,000
4
3
2,663
Off Market
3200 Marburger Ave, Belmont, CA 94002
0.13
$700,000
-
-
-
For Sale
3106 Marburger Ave, Belmont, CA 94002
0.16
$2,199,000
3
2
1,340
For Sale
2945 San Juan Blvd, Belmont, CA 94002
0.15
$1,257,000
4
2
1,640
Recently Sold

Local Information

  • Map ViewExplore the area around 3217 Upper Lock Ave.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1962
Living Area
2,570 sqft
Price/Sqft
$1,140
Parking
Garage

About this House

This single-family home is located at 3217 Upper Lock Ave, Belmont, CA. 3217 Upper Lock Ave is in the Plateau-Skymont neighborhood in Belmont, CA and in ZIP code 94002. This property has 3 bedrooms, 4 bathrooms and approximately 2,570 sqft of floor space. This property has a lot size of 8581 sqft and was built in 1962.
3217 Upper Lock Ave, Belmont, CA 94002 is a 3 bedroom, 4 bathroom, 2,570 sqft single-family home in Plateau-Skymont, built in 1962. It last sold for $2,467,000 on Dec 5, 2022. It is currently off market. The Trulia Estimate is $2,930,400, with a rent estimate of $7,910/month.

Home Details for 3217 Upper Lock Ave

Interior Features

Heating & Cooling
Heating: OtherAir ConditioningCooling System: CentralHeating Fuel: Other
Levels, Entrance, & Accessibility
Stories: 2
Interior Details
Number of Rooms: 8

Property Information

Year Built
Year Built: 1962
Property Type / Style
Property Type: Single Family Home

Exterior Features

Parking & Garage
GarageParking Spaces: 2Parking: Garage Attached

Community

Units in Building: 1

Lot Information

Lot Area: 8581 sqft

Price and Tax history

DateEventPrice
Dec 5, 2022
Source: N/A
Sold
$2,467,000
Nov 1, 2022
Source: MLSListings Inc #ML81910626
Contingent
$2,498,000
Oct 16, 2022
Source: MLSListings Inc #ML81910626
Listed For Sale
$2,498,000
Dec 30, 1997
Source: N/A
Sold
$468,000

Market trends in Belmont

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
50
4MoM
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Around this home

Neighborhood Overview

Plateau-Skymont
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Plateau-Skymont

At least 1 Trulia users voted on each feature.

  • 100 % Say neighbors are friendly

  • 100 % Say there are community events

  • 100 % Say they plan to stay for at least 5 years

  • 100 % Say there's holiday spirit

  • 100 % Say yards are well-kept

  • 100 % Say car is needed

  • 100 % Say people would walk alone at night

  • 100 % Say kids play outside

  • 100 % Say it's dog friendly

  • 100 % Say there's wildlife

  • 100 % Say it's walkable to grocery stores

  • 100 % Say parking is easy

Sourced by Trulia users. Learn more about our methodology.
  • Scroman
    "Lots of dogs owners. Dogs are leashed and most owners are top tier, clean up, and treat dogs well. No dogs left outside barking. "
    0
    Flag
  • Jenniemaruyama
    "Having a Caltrain station in Belmont is very convenient. Three tech companies pick their employees up at bus stops at El Camino Real and Ralston. Wonderful neighborhood. "
    0
    Flag
  • Volodymyrd
    " My favorite quality of San Mateo is its location. It's at the cross section highways in the SF Peninsula and a short drive to/from anywhere. CA 101 North is a short drive to San Francisco, South to San Jose. CA 92 East heads over the San Mateo Bridge to the East Bay, Oakland and Berkley. CA 92 West takes you over the hill to Half Moon Bay and some of the best surfing in the world. CA 280 was at one time called the 'Most beautiful Highway in the World' and is still my favorite way to travel the Bay Area."
    0
    Flag

LGBTQ Local Legal Protections

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Homes for sale near 3217 Upper Lock Ave

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Off Market Homes Near 3217 Upper Lock Ave

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Frequently asked questions about 3217 Upper Lock Ave

  • What is 3217 Upper Lock Ave estimated to be worth?
    Trulia's estimated value for 3217 Upper Lock Ave in Belmont, CA is $2,930,400.
  • What is the price history for 3217 Upper Lock Ave?
    3217 Upper Lock Ave in Belmont, CA last sold for $2,467,000 in December 2022.
  • Is Belmont a buyer's or seller's market?
    Belmont is currently a seller's market, based on recent for-sale activity.
  • What are the closest schools to 3217 Upper Lock Ave?
    The closest schools to 3217 Upper Lock Ave in Belmont, CA are Carlmont High School (rated 10/10), Fox Elementary School (rated 10/10), Ralston Intermediate School (rated 10/10).
  • Does 3217 Upper Lock Ave have air conditioning?
    Yes, 3217 Upper Lock Ave in Belmont, CA has air conditioning.
  • How big is the lot at 3217 Upper Lock Ave?
    The lot at 3217 Upper Lock Ave in Belmont, CA is about 0.20 acres (8,581 sq ft).