$505,000 - 831 S Mountain Avenue, Ontario

  • 3Beds
  • 3Baths
  • 1,408SQ. Feet
  • 0.09Acres

Ontario Home Sale

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.

Sales Agent

Sam Smith
  • Sam Smith
  • San Clemente Realtor ®
  • Phone: 949-204-5110
  • Cell: 949-204-5110
  • Contact Agent Now

Amenities

  • AmenitiesMaintenance Grounds, Pool, Spa/Hot Tub, Trash, Water
  • UtilitiesCable Available, Electricity Available, Natural Gas Available, Phone Available, Sewer Connected, Water Available, Water Connected
  • Parking Spaces2
  • ParkingDirect Access, Garage, One Space, On Site
  • # of Garages2
  • GaragesDirect Access, Garage, One Space, On Site
  • ViewMountain(s), Pool
  • Has PoolYes
  • PoolAssociation, Heated, In Ground
  • SecurityCarbon Monoxide Detector(s), Smoke Detector(s)

School Information

  • DistrictOntario-Montclair

Essential Information

  • MLS® #OC25173885
  • Price$505,000
  • Bedrooms3
  • Bathrooms3.00
  • Full Baths2
  • Half Baths1
  • Square Footage1,408
  • Acres0.09
  • Year Built1979
  • TypeResidential
  • Sub-TypeCondominium
  • StatusClosed
  • Listing AgentClare Lenza
  • Listing OfficeVersailles Property

Exterior

  • Lot DescriptionWalkstreet
  • WindowsDouble Pane Windows, Screens

Additional Information

  • Date ListedAugust 15th, 2025
  • Days on Market81
  • ZoningR
  • Short SaleN
  • RE / Bank OwnedN

Community Information

  • Address831 S Mountain Avenue
  • Area686 - Ontario
  • CityOntario
  • CountySan Bernardino
  • Zip Code91762

Interior

  • InteriorVinyl
  • Interior FeaturesSeparate/Formal Dining Room, All Bedrooms Up, Walk-In Closet(s)
  • AppliancesDryer, Gas Oven, Gas Range, Microwave, Refrigerator, Self Cleaning Oven, Washer
  • HeatingCentral
  • CoolingCentral Air, Ductless, Wall/Window Unit(s)
  • FireplaceYes
  • FireplacesFamily Room, Gas
  • # of Stories2
  • StoriesTwo

Price Change History for 831 S Mountain Avenue, Ontario, (MLS® #OC25173885)

Date Details Price Change
Closed
Active Under Contract (from Active)
Price Reduced (from $518,000) $505,000 $13,000 (2.51%)

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  • City:
    Ontario
  • Price Range:
    $255,000 - $1,599,990
  • Current Listings:
    1231
  • HOA Dues:
    $173
  • Average Price per Square Foot:
    $431

Back to Search Results

Based on information from California Regional Multiple Listing Service, Inc. as of December 20th, 2025 at 3:56am PST. This information is for your personal, non-commercial use and may not be used for any purpose other than to identify prospective properties you may be interested in purchasing. Display of MLS data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals. Information from sources other than the Listing Agent may have been included in the MLS data. Unless otherwise specified in writing, Broker/Agent has not and will not verify any information obtained from other sources. The Broker/Agent providing the information contained herein may or may not have been the Listing and/or Selling Agent.