3521 Keystone Loop, Discovery Bay, CA 94505
Property image
Property image
OFF MARKET

3521 Keystone Loop
Discovery Bay, CA 94505

  • 5 Beds
  • 4 Baths
  • 4,088 sqft

$845,700

Trulia Estimate
as of Jul 24, 2026
Est. Refi. Payment $5,152/mo*
Refinance Your Home

$845,700

Trulia Estimate
as of Jul 24, 2026
Est. Refi. Payment $5,152/mo*
Refinance Your Home
5 Beds
4 Baths
4,088 sqft

Local Information

  • Map ViewExplore the area around 3521 Keystone Loop.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
2003
Living Area
4,088 sqft
Price/Sqft
$207
Parking
Garage

About this House

Luxurious House in a Gated Community
 5 Bedrooms plus an Activity room, 4 Baths, 3 Car garage
 one bedroom and a Bathroom downstairs
highly desired Lakeshore Community
20 minutes' drive to Livermore
Cozy family room with fireplace
Beautiful landscaped yard with Build-in BBQ Grill
 Huge Master suit with fireplace
 Easy access to a lovely lake in the community with fountain and walking
trail.
 Community Pool and walk to school
 1 year lease minimum, Available Now
 Pets Upon Approval
 Open house on September 25th, Sunday, 12-1pm
 Email or Text
3521 Keystone Loop, Discovery Bay, CA 94505 is a 5 bedroom, 4 bathroom, 4,088 sqft single-family home built in 2003. It last sold for $90,000 on Apr 29, 2022. More recently, it was listed as a rental in September 2022 with an asking price of $3,800 per month. That rental listing was removed on September 30, 2022. It is currently off market. The Trulia Estimate is $845,700, with a rent estimate of $4,194/month.

Home Details for 3521 Keystone Loop

Interior Features

Heating & Cooling
Heating: Forced Air, GasAir ConditioningCooling System: OtherHeating Fuel: Forced Air
Interior Details
Number of Rooms: 11Types of Rooms: Dining Room, Family Room
Appliances & Utilities
DishwasherDryerWasher
Levels, Entrance, & Accessibility
Floors: Hardwood

Exterior Features

Exterior Home Features
Roof: TileExterior: Stucco
Pool
Pool
Parking & Garage
GarageParking Spaces: 3Parking: Garage Detached

Property Information

Year Built
Year Built: 2003Year Updated: 2004
Property Type / Style
Property Type: Single Family Home

Community

Units in Building: 1

Lot Information

Lot Area: 6499 sqft

Price History for 3521 Keystone Loop

DatePriceEventSource
09/30/2022ListingRemovedZillow Rental Manager
09/16/2022$3,800Listed For RentZillow Rental Manager
04/29/2022$90,000Sold
N/A
03/19/2022$896,000Listed For SaleSFAR #422640414
08/06/2020$700,000Sold
CCAR #40909966
06/26/2020$644,950Listed For SaleAgent Provided
11/22/2019$585,000Sold
N/A
11/08/2017$2,950ListingRemovedN/A
11/05/2017$2,950Listed For RentN/A
11/12/2010$440,000Sold
N/A

Market trends in Discovery Bay

Last updated June 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
119
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Property Tax and Assessment

Year2025
Tax$11,404
Assessment$841,000
Home facts updated by county records

Comparable Sales for 3521 Keystone Loop

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
3416 Keystone Loop, Discovery Bay, CA
0.06
Single-Family Home
$683,494
07/01/26
5
4
4,109
3432 Keystone Loop, Discovery Bay, CA
0.05
Single-Family Home
$818,000
04/14/26
5
4
4,011
3438 Keystone Loop, Discovery Bay, CA
0.05
Single-Family Home
$849,900
07/20/26
6
4
4,088
3645 Otter Brook Loop, Discovery Bay, CA
0.02
Single-Family Home
$750,000
11/20/25
5
3
3,536
3627 Otter Brook Loop, Discovery Bay, CA
0.05
Single-Family Home
$827,000
12/23/25
5
3
3,435
3507 Keystone Loop, Discovery Bay, CA
0.02
Single-Family Home
$725,000
10/24/25
4
3
3,030
3638 Otter Brook Loop, Discovery Bay, CA
0.05
Single-Family Home
$850,000
12/01/25
4
3
3,272
531 Half Moon Ct, Discovery Bay, CA
0.17
Single-Family Home
$858,000
01/29/26
5
4
4,011
716 Seminole Ct, Discovery Bay, CA
0.11
Single-Family Home
$750,000
04/30/26
4
3
3,517
414 Superior Way, Discovery Bay, CA
0.33
Single-Family Home
$283,500
07/07/26
4
3
3,272

Nearby homes

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Assigned Schools

These are the assigned schools for 3521 Keystone Loop.
View nearby schools on GreatSchools
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

What Locals Say about Discovery Bay

At least 100 Trulia users voted on each feature.

  • 94 % Say it's dog friendly

  • 90 % Say there are sidewalks

  • 90 % Say car is needed

  • 90 % Say yards are well-kept

  • 86 % Say people would walk alone at night

  • 85 % Say parking is easy

  • 82 % Say there's holiday spirit

  • 76 % Say kids play outside

  • 75 % Say it's quiet

  • 74 % Say streets are well-lit

  • 64 % Say neighbors are friendly

  • 54 % Say there are community events

  • 50 % Say they plan to stay for at least 5 years

  • 47 % Say there's wildlife

  • 35 % Say it's walkable to restaurants

  • 26 % Say it's walkable to grocery stores

Sourced by Trulia users. Learn more about our methodology.
  • Andy E.
    "Discovery Bay is a beautiful bedroom community! It is on the Delta so all things water, boating, skiing, fishing, wildlife viewing are here! Safe community with great schools and great farmers markets nearby! Nearby Brentwood is great community with most everything you could need!"
    4
    Flag
  • Laurie Y.
    "This neighborhood is truly like no other. It’s on the Sacramento delta and the river is in your back yard. I live in a neighborhood where all my neighbors are friendly and keep an eye out for anything peculiar going on without being nosey. A great street to live on. "
    1
    Flag
  • Sierra K.
    "There are parks close by, people are friendly, clean community, and safe to walk in day time and at night"
    1
    Flag
  • Joanna J.
    "The things I like about our community are the holiday Boat parades, trails, nicely maintained parks that are safe for children."
    0
    Flag
  • Dlarry
    "The people here are pleasant and lookout for each other. Parks are great equip with doggie bags. The holidays are festive, most of the neighbors decorate their home during Christmas and Halloween."
    1
    Flag
  • James
    "Great place to raise a family, always having great times with the neighbors, everyone is friendly and helpful. "
    0
    Flag
  • D
    "Winery concerts and annual Christmas lights parade on the water. The boat owners are residents and volunteer to decorate their boats for the event. We have the seasonal cherry picking as well other fruits. "
    0
    Flag
  • D
    "We have an annual Christmas light show on the water. Neighbors are really friendly. The parks are dog friendly."
    0
    Flag
  • Dlarry
    "The parks are dog friendly and provide doggy bag through out the parks. People tend to ignore the speed limits and roll stop signs so be careful when crossing the street with your pet."
    0
    Flag
  • Laurie Y.
    " This town is big on community events....car shows, free concerts, boat parades, boat races, setting world records by tying together anything that floats with people on it ( we are in the record books as the largest human float) Christmas parade and open house.....altogether a very neighborly place to live."
    0
    Flag
  • JG
    "Friendly neighbors, black parties, bbqing, clean town, plenty of water sports, and great local eateries. "
    0
    Flag
  • Jlindemann23
    "It’s quiet but isolated. Neighbors can be nosey but mostly keep to themselves. Definitely need a car out here"
    0
    Flag
  • Ajmahlberg
    "There is no public transportation that I know of. Dial-a-Ride is available. Shuttle drivers also for airport destinations. "
    0
    Flag
  • XandraF.
    "I just recently moved here with family. it's Christmas time so I noticed that a lot of the neighborhood get together and decorate the streets for the holidays "
    0
    Flag
  • Skyler R.
    "There are lots of dogs walking with their owners, and there are 2 new(ish) dog parks at the community center! "
    0
    Flag
  • Samantha R.
    "Not to sure only live here for 2 years, we rent the house and I don’t really go out during the day time, as it is too hot. We go out in the evening, to walk he cat as the floor during the day is to hot."
    0
    Flag
  • Cali G.
    "I've lived here for 8 yrs now as a tenant. The community here at the Lakes are not very open not do they like renters! "
    0
    Flag
  • Barbara W.
    "I am a resident of Discovery Bay. As a whole, this little town is pretty safe. Very pet friendly. Great elementary schools and churches. Most within walking distance. Caution is required when crossing in the crosswalks at Discovery Bay Blvd. and Riverlake Rd's. as there has been a few minor hit and runs. Discovery Bay is a friendly community and a great place to raise your children."
    2
    Flag
  • John M.
    "You can't beat the discovery Bay Country Club living, it is a gated community and all of the homes are manicured with beautiful Golf Course views all through the community, it is a vary relaxed place to live and vary quite."
    0
    Flag
  • Discophil
    "Small town with Excelent Sushi Grill, Starbucks, Recreational Boat harbor w/ restaurant"
    0
    Flag

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Apartments for Rent

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Explore by feature - Pet Friendly

6 pet-friendly rentals in Discovery Bay, CA

Explore by feature - Garage

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Explore by feature - Air Conditioning

13 rentals with air conditioning in Discovery Bay, CA

Explore by feature - Pool

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Explore by feature - Washer/dryer

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Explore by feature - Outdoor Space

6 rentals with an outdoor space in Discovery Bay, CA

Homes for sale near 3521 Keystone Loop

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Off Market Homes Near 3521 Keystone Loop

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