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831 S Mountain Avenue
Ontario CA 91762 US

$518,000

Active Listing ID OC25173885
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3 bed
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3.00 Bath (2 Full , 1 Half)
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Lot: 4,125.00 Square Feet
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Condominium

$518,000

Active Listing ID OC25173885
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831 S Mountain Avenue 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.

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Property Features

  • Facts
  • Lot Size: 4,125.00 Square Feet
  • Property Type: Residential
  • Property Sub-type: Condominium
  • Features
  • Full Bathrooms: 2
  • 1/2 Bathrooms: 1
  • Cooling System: Central Air, Ductless, Multi Units, Wall/Window Unit(s), Window Unit(s)
  • Exterior Finish: Community Features Included: Sidewalks, Walkstreet
  • Floor Covering: Vinyl
  • Heating Fuels: Central

Property

  • propertytype: Residential
  • propertysubtype: Condominium
  • listprice: 518000
  • unparsedaddress: 831 S Mountain Avenue
  • postalcity: Ontario
  • stateorprovince: CA
  • country: US
  • postalcode: 91762
  • bathroomsfull: 2
  • bathroomshalf: 1
  • bathroomsonequarter: 0
  • bathroomsthreequarter: 0
  • lotsizeacres: 0.0946969696969697
  • lotsizeunits: Square Feet
  • lotsizearea: 4125
  • livingarea: 1408
  • livingareaunits: Square Feet
  • listagentfullname: Clare Lenza
  • listagentemail: clare@clarelenza.com
  • listagentkey: 3yd-MRMLSCA-OCLENZMAR
  • listagentmlsid: OCLENZMAR
  • listagentpreferredphone: 9499038522
  • listagentofficephone: 9497320624
  • listofficekey: 3yd-MRMLSCA-OC07076
  • listagentstatelicense: 01981062
  • listofficemlsid: OC07076
  • disclaimer: Copyright © 2025 California Regional Multiple Listing Service, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
  • sourcesystemid: MRMLSCA
  • yearbuilt: 1979
  • listingcontractdate: 2025-08-15
  • listagenturl: http://clarelenza.com
  • countyorparish: San Bernardino
  • parcelnumber: 1011382170000
  • elementaryschooldistrict: Ontario-Montclair
  • middleorjuniorschooldistrict: Ontario-Montclair
  • highschooldistrict: Ontario-Montclair
  • appliances: Microwave, Oven - Gas, Range, Range - Gas, Refrigerator
  • cooling: Central Air, Ductless, Multi Units, Wall/Window Unit(s), Window Unit(s)
  • flooring: Vinyl
  • heating: Central
  • numberofunitstotal: 1
  • fireplaceyn: False
  • transactiontype: ForSale
  • storiestotal: 2
  • parkingtotal: 2
  • parkingfeatures: Garage
  • view: Mountain
  • waterfrontyn: False
  • interiorfeatures: Window Features: Double Pane Windows, Screens
  • exteriorfeatures: Community Features Included: Sidewalks, Walkstreet
  • windowfeatures: Double Pane Windows
  • architecturalstyle: Other
  • rooms: Bathroom 1, Bathroom 2, Bathroom 3, Bedroom 1, Bedroom 2, Bedroom 3
  • dock: False
  • poolprivateyn: False
  • spayn: False
  • internetaddressdisplayyn: True
  • internetautomatedvaluationdisplayyn: True
  • internetconsumercommentyn: True
  • customfields: {"AdditionalInformation":{}, "AlternatePrices":[], "BrokerName":"Global Bancorp", "BuilderEmail":null, "BuilderFax":null, "BuilderPhone":null, "City":null, "Country":null, "Expenses":[{"ExpenseCategory":"Home Owner Assessments Fee", "ExpenseFrequency":"Monthly", "ExpenseValue":432}], "GeocodeOptions":null, "LeadRoutingEmail":"clare@clarelenza.com", "ListBrokerageCity":"Irvine", "ListBrokerageCountry":"US", "ListBrokerageEmail":"NINA@VERSAILLESPROPERTY.COM", "ListBrokerageLogoUrl":null, "ListBrokerageName":"Global Bancorp", "ListBrokeragePhone":"(949) 422-9549", "ListBrokeragePostalCode":"92614", "ListBrokerageStateOrProvince":"CA", "ListBrokerageUnitNumber":null, "ListBrokerageUnparsedAddress":"2020 Main Street, Suite 300", "ListBrokerageWebsiteUrl":null, "ListOfficeAddress1":"1900 MAIN STREET SUITE 315", "ListOfficeAddress2":null, "ListOfficeBrokerMlsId":"OCHANNNIN", "ListOfficeCity":"Irvine", "ListOfficeCountry":"US", "ListOfficeEmail":"nina@versaillesproperty.com", "ListOfficePostalCode":"92614", "ListOfficeStateOrProvince":"CA", "ListPriceCurrencyType":"USD", "ListingTitle":"Condominium - Ontario, CA", "ListingURL":"https://www.realtor.com/realestateandhomes-detail/831-S-Mountain-Ave_Ontario_CA_91762_M12798-12849?f=listhub&s=MRMLSCA&m=OC25173885&c=rexren", "MLSModificationTimestamp":"2025-08-15T07:38:43Z", "Neighborhoods":[], "PostalCode":null, "RawPropertySubType":"Condominium", "RawPropertyType":"Residential", "RoomCount":null, "StateOrProvince":null, "Taxes":[], "UnitNumber":null, "UnparsedAddress":null}
Listing Changed: 10/19/2025 8:08:05 PM GMT
Source Updated Date: 12/5/2025 12:40:34 PM GMT

Courtesy of: Clare Lenza, Versailles Property, clare@clarelenza.com

Copyright © 2025 California Regional Multiple Listing Service, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.