21 Knoll St, Riverside, CT 06878
Property image
Property image
OFF MARKET

$3,591,800

Trulia Estimate
  • 4 Beds
  • 2 Baths
  • 2,765 sqft (on 0.26 acres)

21 Knoll St, Riverside, CT 06878

Riverside
Est. Refi. Payment $23,770/mo*
Refinance Your Home
Currently Off Market - Sold Jun 18, 2018 for $1,855,000

Home Value

Trulia Estimate
$3.59M
Since last month
Decreased$52K (-1.4%)
Since last year
Increased$427K (+13.5%)
Since last sale
Increased$2M (+93.5%)
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 +77% in the last 10 years
MonthEstimated value
2026
August 2026$3.59M
August 2026$3.58M
July 2026$3.64M
June 2026$3.77M
May 2026$3.65M
April 2026$3.58M
March 2026$3.57M
February 2026$3.4M
January 2026$3.39M
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
64 Summit Rd, Riverside, CT
0.04
Single-Family Home
$2,525,000
07/01/26
5
3
2,737
25 Summit Rd, Riverside, CT
0.15
Single-Family Home
$2,510,000
03/09/26
4
3
2,489
22 Summit Rd, Riverside, CT
0.16
Single-Family Home
$3,100,000
01/27/26
4
2.5
3,022
30 Weston Hill Rd, Riverside, CT
0.17
Single-Family Home
$2,800,000
07/14/26
4
3
1,882
20 Weston Hill Rd, Riverside, CT
0.15
Single-Family Home
$866,384
07/02/26
4
4
2,982
19 Knoll St, Riverside, CT
0.01
Single-Family Home
$305,000
05/11/26
4
4
2,790
29 Coventry Ln, Riverside, CT
0.28
Single-Family Home
$2,753,000
07/07/26
5
4
2,612
58 Arch Street, Greenwich, CT
0.38
Single-Family Home
$2,450,000
09/10/26
4
4
2,941
24 Oval Ave, Riverside, CT
0.28
Single-Family Home
$3,004,000
08/18/26
5
3.5
2,998
32 Winthrop Dr, Riverside, CT
0.38
Single-Family Home
$3,551,999
07/01/26
4
2.5
2,627

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
20 Knoll St, Riverside, CT 06878
0.04
$4,571,500
5
4.5
3,625
Off Market
64 Summit Rd, Riverside, CT 06878
0.04
$2,525,000
5
3
2,737
Recently Sold
5 Spring St, Riverside, CT 06878
0.09
$5,334,600
6
6
6,469
Off Market
294 Riverside Ave, Riverside, CT 06878
0.14
$4,150,800
5
4.5
4,392
Off Market
14 Spruce St, Riverside, CT 06878
0.15
$4,651,000
5
5
3,709
Off Market
258 Riverside Avenue, Riverside, CT 06878
0.18
$4,161,300
5
3.5
3,647
Off Market
14 Marks Rd, Riverside, CT 06878
0.19
$3,115,400
4
3.5
2,520
Off Market
7 Colonial Ln, Riverside, CT 06878
0.18
$4,165,500
4
3.5
3,563
Off Market
25 Summit Rd, Riverside, CT 06878
0.15
$2,510,000
4
3
2,489
Recently Sold
22 Summit Rd, Riverside, CT 06878
0.16
$3,100,000
4
2.5
3,022
Recently Sold
247 Riverside Ave, Riverside, CT 06878
0.18
$8,300,000
6
8.5
9,485
Recently Sold
11 Colonial Ln, Riverside, CT 06878
0.20
$4,594,300
5
5.5
4,302
Off Market

Local Information

  • Map ViewExplore the area around 21 Knoll St.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Single-Family Home
Built in 1930
0.26 acre lot
2,765 sqft
$1,299/sqft
Garage

About this House

Classic home on lovely Knoll Street, a quiet neighborhood with walking distance to the Riverside station and schools. This charming and light-filled residence with gleaming hardwood floors throughout has beautifully proportioned rooms with French doors from living/sun/family rooms leading to the inviting private deck and fenced in level backyard. Gourmet kitchen with large island opens to the family room - great place for family gatherings. High end appliances -sub-zero/viking/miele-many of recent updates. Large master bedroom with sitting area and newly updated master bath plus 3 additional bedrooms/full bath and separate laundry room complete the second floor, serviced by front and rear staircase. Lower level playroom and additional storage areas. Don't miss this great opportunityGreat location, close to everything. Don't miss this opportunity!
21 Knoll St, Riverside, CT 06878 is a 4 bedroom, 2 bathroom, 2,765 sqft single-family home in Riverside, built in 1930. It last sold for $1,855,000 on Jun 18, 2018. More recently, it was listed as a rental in August 2014 with an asking price of $8,250 per month. That rental listing was removed on August 20, 2016. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $3,591,800, with a rent estimate of $7,997/month.

Home Details for 21 Knoll St

Interior Features

Interior Details
BasementNumber of Rooms: 10
Heating & Cooling
Heating: Forced AirAir ConditioningHeating Fuel: Forced Air
Levels, Entrance, & Accessibility
Stories: 2
Appliances & Utilities
Dishwasher
Fireplace & Spa
Fireplace
Security
Security System

Exterior Features

Exterior Home Features
Roof: AsphaltDeckExterior: WoodPatio
Parking & Garage
GarageParking: Garage Attached

Property Information

Year Built
Year Built: 1930Year Updated: 1970
Property Type / Style
Property Type: Single Family HomeArchitecture: Colonial

Community

Units in Building: 1

Lot Information

Lot Area: 0.26 acres

Price and Tax history

DateEventPrice
Jun 18, 2018
Source: Greenwich MLS, Inc. #103062
Sold
$1,855,000
May 7, 2018
Source: Agent Provided
Listed For Sale
$1,920,000
Aug 20, 2016
Source: Agent Provided
ListingRemoved
$8,500
Mar 15, 2015
Source: Agent Provided
ListingRemoved
$8,250
Aug 24, 2014
Source: Agent Provided
Listed For Rent
$8,250

Market trends in Greenwich

Last updated August 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$2.58M
$150KMoM
Sale-to-List Price
104.8%
1.0%MoM
Price per sq ft
$825
$1MoM
Available listings
152
30MoM

Around this home

Neighborhood Overview

Riverside
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Riverside

At least 48 Trulia users voted on each feature.

  • 92 % Say parking is easy

  • 91 % Say it's dog friendly

  • 90 % Say yards are well-kept

  • 90 % Say people would walk alone at night

  • 89 % Say kids play outside

  • 87 % Say car is needed

  • 87 % Say there's holiday spirit

  • 86 % Say they plan to stay for at least 5 years

  • 82 % Say it's quiet

  • 75 % Say neighbors are friendly

  • 74 % Say there's wildlife

  • 71 % Say there are sidewalks

  • 58 % Say it's walkable to restaurants

  • 55 % Say it's walkable to grocery stores

  • 53 % Say there are community events

  • 52 % Say streets are well-lit

Sourced by Trulia users. Learn more about our methodology.
  • Sharon Elkayam
    "It is a friendly community where the kids ride bikes and play together. The schools are good. The kids play in the front yards. "
    0
    Flag
  • Trulia User
    "Very dog friendly. Lots of great places to walk with a dog. Many dog owners. The beach in Old Greenwich is a fun place to meet other dog owners and allow them to play."
    0
    Flag
  • Trulia User
    "I95 is the worst and the Merritt parkway are very difficult to commute on. Good luck if you need to commute during peak times. "
    1
    Flag
  • Sharonelkayam
    "Kid and pet friendly. Nice neighbors and well kept homes. The schools are great. Good area for walking and running. Near trains and shopping area in Old Greenwich. Beach is also a few minutes away."
    1
    Flag
  • Jesselynn G.
    "The elementary school fairs/carnivals, trick or treating, fireworks at the park nothing else in particular but overall a great neighborhood "
    0
    Flag
  • Rebecca
    "People r always out walking their dogs. Cars know they have the right of way and will either slow or go around completely "
    0
    Flag
  • Rebecca
    "Cozy neighborhood feel. Folks say hello when u walk past them. Lots of kids on bikes and dogs on leash"
    0
    Flag
  • Msuppodvm
    "Many special events around families and children. Many resources available for families and kids. Excellent afternoon programs, many sports programs. "
    0
    Flag
  • Mirielramos
    "I love my neighborhood is peaceful and quiet, nice place to live, and have all close by, bank, supermarket, drug stores etc"
    0
    Flag
  • Mcm.captiva@gmail.com
    "I see lots of dogs being walked. and responsible dog owners cleaning up after their dogs. Some owners having invisible fenced and didn't playing in yards. "
    0
    Flag
  • Mcm.captiva@gmail.com
    "neighborhood charity 10K runs. Church carnival. patriotic displays. fireworks in park. outdoors music."
    0
    Flag
  • Mcm.captiva@gmail.com
    "I take train to GCT and it is a short walk to METRO North. The commuter trains run very reliably and often."
    0
    Flag
  • Kimberly.kois
    "Very family friendly , sporty , safe , neighborhood with great access to public transportation, elementary schools, parks, playground , beach , Old Greenwich town"
    0
    Flag
  • Rebecca
    "Close to the water....can walk into town...kids walk or bike to school....unspoken neighborhood watch "
    8
    Flag
  • Sophiecoko
    "Living in a coastal neighborhood is really special. I love seeing the kids biking to the beach without jackets on ready to sail, kayak or paddle board."
    0
    Flag
  • dryfly7
    "Beautiful Dogwood Park Association, 3 minute walk to highly rated North Mianus Elementary School"
    0
    Flag

LGBTQ Local Legal Protections

Frequently asked questions about 21 Knoll St

  • What is 21 Knoll St estimated to be worth?
    Trulia's estimated value for 21 Knoll St in Riverside, CT is $3,591,800.
  • What is the price history for 21 Knoll St?
    21 Knoll St in Riverside, CT last sold for $1,855,000 in June 2018.
  • Is Riverside a buyer's or seller's market?
    Riverside is currently a seller's market, based on recent for-sale activity.
  • What's the median sale price in Riverside?
    The median sale price in Riverside is $2.58M. That is up $150K from the prior month.
  • How big is the lot at 21 Knoll St?
    The lot at 21 Knoll St in Riverside, CT is about 0.26 acres (11,326 sq ft).
  • Does 21 Knoll St have a garage?
    Yes, 21 Knoll St in Riverside, CT has a garage.

Explore by feature - Pet Friendly

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Apartments for Rent

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