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Back 831 South Mountain Avenue
Off Market

831 South Mountain Avenue

Ontario CA 91762

3
3
2
1408 sq. ft.
4125 sq. ft.
Condo
Last sold for $475,000
Clare LenzaClare Lenza, last sold this property on 05 December 2025 after 111 days on market.

Overview

Price Reduced – Motivated Sellers! Welcome to this beautifully refreshed 3-bedroom, 2.5-bathroom townhouse-style condo located in the heart of Ontario! Boasting an open-concept layout filled with natural light, this home features spacious living areas enhanced by large windows and a cozy fireplace perfect for chilly evenings. The adjacent dining area opens to a private patio, complete with a beautiful avocado tree, ideal for summer barbecues, family gatherings, and convenient access to the community pool. The home has been freshly painted throughout and thoughtfully upgraded with a brand-new, fully remodeled kitchen featuring new cabinets, stainless steel appliances, quartz stone countertops, and durable hard surface flooring throughout, no carpet anywhere! This move-in-ready property includes a brand-new refrigerator, washer, dryer, over-the-stove microwave, and dishwasher offered by the owner. Enjoy the convenience of direct access to a two-car garage from inside the home, along with an additional designated parking space. Upstairs, you’ll find three generously sized bedrooms, including two oversized rooms with individual mini-split A/C units that share a large full bathroom. The primary suite features its own private bath and a spacious walk-in closet. Set in a small, quiet, and friendly community with long-term residents, this home offers both peace of mind and a welcoming atmosphere. Enjoy scenic views of snow-capped mountains in the winter, and plenty of open parking year-round. Centrally located just 2 miles from the 60 and 10 freeways, and close to schools, markets, shops, and neighboring cities like Upland, Montclair, and Chino. Whether you're a first-time buyer, investor, or looking to right-size, this gem is a rare find! Community amenities include a pool and spa, with HOA dues covering water and trash, making for easy, low-maintenance living.

Features

3 bedrooms
3 bathrooms
2 carspaces
2 garage spaces
1408 sq. ft. floor area
4125 sq. ft. lot size
Condo

Estimated Value

Based on this property and similar 3 bedroom condos sold in Ontario over the last 12 months, the estimated median property value of 831 South Mountain Avenue is $589.84k.

Median value
$589.84k
Estimated value range
$431k - $702.49k
Median days on market
34
Estimated value trend
-5%
decrease over the last 12 months
Average days on market is based on recent, comparable sales in Ontario. It is only an indication of the time a property is actively listed and should not be relied upon as an accurate representation of how soon a property will be sold.

Property history for 831 South Mountain Avenue

2025
Sold
$475,000
05 Dec 2025 by Clare Lenza, of Global Bancorp

Happy sellers in Ontario

100%
100% of sellers in Ontario reported that their sale price either exceeded or met their price expectations.

Ontario stands out for consistently delivering exceptional satisfaction and strong market results for homeowners.

This is based on voluntary sentiment collected from 3 reviews in Ontario over the last 12 months.

Local market activity for 3 bedroom condos in Ontario

In the last 12 months, 37 three-bedroom condos similar to 831 South Mountain Avenue, have been sold.

This represents a 37% increase in three-bedroom condos sales when compared to the previous 12 months.

Nearby agents

Compare and contact these top performing agents who’ve delivered exception customer service for their clients in Ontario

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Cinthya Hernandez

Cinthya Hernandez is a recommended agent for Ontario.  They have 2 local sales and collected 2 local reviews across the last 12 months.

  •   5   (15 reviews)
  •  2 Reviews in Ontario
  •  2 Sales in Ontario
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Brantley Oie

Brantley Oie is a recommended agent for Ontario.  They have 1 local sale and collected 1 local review across the last 12 months.

  •   5   (16 reviews)
  •  1 Review in Ontario
  •  1 Sale in Ontario
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Samuel Castorena

Sellers who recommend Samuel Castorena have praised them for being responsive, local expert, clear communication, hard-working, detail-oriented, and friendly

  •   5   (22 reviews)
  •  1 Review in Ontario
  •  1 Sale in Ontario
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SANDAR WEST

SANDAR WEST is a recommended agent for Ontario.  They have 1 local sale and collected 1 local review across the last 12 months.

  •   5   (7 reviews)
  •  1 Review in Ontario
  •  1 Sale in Ontario
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