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138 Knollwood AvenueMamaroneck, NY 10543

For Sale

$1,100,000

Smart Buyer Rebate $11,000

Classic Tudor charm meets an easy, flexible layout in this character-filled Harbor Heights home.

The main level is anchored by a dramatic living room with soaring cathedral ceilings, abundant natural light, and a wood-burning fireplace - the kind of space that immediately feels special. An adjoining dining area creates an easy flow for dinners and entertaining, while a separate den offers the perfect spot for a home office, cozy TV room, playroom, or reading lounge.

Just off the dining room, the kitchen features a sunny breakfast nook and full bath. A generous screened porch extends the living space outdoors and is ideal for morning coffee, summer dinners, or relaxed weekends at home. Direct access to the attached garage makes everyday life that much easier.

Upstairs, the primary suite features a renovated ensuite bath and direct walk-up access to the attic, offering convenient additional storage. Three additional bedrooms and a full bath complete the second floor. Downstairs, the unfinished basement currently used for laundry, storage and as a workspace, could transform into a home gym or rec space.

With its distinctive Tudor architecture, cathedral ceilings, fireplace, screened porch, and versatile spaces throughout, this is a home with the character that’s hard to recreate - and the opportunity to update in your own style is endless!

Harbor Heights is a quiet, bike-riding neighborhood. Warren Park with playground, ball fields, tennis and pickleball is nearby, and train, school and town are nearby, too. Mamaroneck also enjoys Harbor Island Park on the sound with beach, boating, playground, bait shop, ball fields, dog park and numerous village events including concerts, fireworks, Sportime's clay tennis courts, pickleball courts, beach volleyball, softball and street parties. Enjoy!

Listed by Mary Stetson

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Stetson Real Estate

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914-381-7173

Last updated September 15, 2026

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Source: OneKey #1044020

Listing Facts

  • TypeSingle-family
  • NeighborhoodMamaroneck
  • Bedrooms4
  • Bathrooms3
  • Days on Prevu3
  • Taxes$18,506/year
  • Size2,030 sqft
  • Price per sqft$542

Amenities

  • Dishwasher
  • Private Outdoor Space
  • Washer/Dryer
  • Parking

Location

Mortgage Calculator

Listing History

09/15/2026
Status changed to Active
$1,100,000
09/15/2026
Listed by Stetson Real Estate
$1,100,000
  1. 09/15/2026$1,100,000
    Status changed to Active
  2. 09/15/2026$1,100,000
    Listed by Stetson Real Estate

Property Details for 138 Knollwood Avenue

Exterior

Construction

  • Property Condition: Actual
  • Window Features: Double Pane Windows
  • Year Built: 1927
  • Architectural Style: Tudor
  • Construction Materials: Brick, Stucco

Features

  • Patio And Porch Features: Covered, Porch, Screened

Measurements

  • Building Area Total: 2,438
  • Building Area Units: Square Feet
  • Lot Size Acres: 0.21
  • Lot Size Square Feet: 9,536

Financial

Taxes

  • Parcel Number: 3203-008-000-00006-000-0451
  • Tax Annual Amount: $18,506.00
  • Tax Assessed Value: $844,000.00
  • Tax Year: 2025

Interior

Features

  • Appliances: Dishwasher, Dryer, Gas Oven, Gas Range, Refrigerator, Washer
  • Fireplace Features: Wood Burning
  • Fireplace: Yes
  • Fireplaces Total: 1
  • Flooring: Carpet, Hardwood
  • Interior Features: First Floor Full Bath, Beamed Ceilings, Cathedral Ceiling(s), Eat-in Kitchen, High Ceilings, Pantry, Washer/Dryer Hookup

Measurements

  • Living Area: 2,030

Rooms

  • Basement: Unfinished
  • Has Basement: Yes
  • Bathrooms Full: 3
  • Bathrooms Total Integer: 3
  • Bedrooms Total: 4
  • Rooms Total: 13

Parking

Parking

  • Garage Spaces: 2
  • Garage: Yes
  • Parking Features: Driveway, Garage
  • Parking Total: 2

Schools

Elementary School

  • Elementary School: Mamaroneck Avenue
  • Elementary School District: Mamaroneck

High School

  • High School: Mamaroneck High School
  • High School District: Mamaroneck

Middle or Junior School

  • Middle Or Junior School: Hommocks School
  • Middle Or Junior School District: Mamaroneck

Utilities

Equipment

  • Cooling: Wall/Window Unit(s)
  • Heating: Natural Gas
  • Laundry Features: In Basement
  • Sewer: Public Sewer
  • Utilities: Trash Collection Public
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this single-family home have?

There are 4 bedrooms and 3 bathrooms in this single-family home at 138 Knollwood Avenue.

What schools are nearby to 138 Knollwood Avenue?

Nearby schools include the Mamaroneck Avenue Elementary School, Hommocks School Middle School, and Mamaroneck High School.

Does this single-family home have parking?

Yes, there are 2 parking spaces available for 138 Knollwood Avenue.

What are the annual taxes for 138 Knollwood Avenue?

Annual taxes for this single-family home are estimated at $18,506.

How does 138 Knollwood Avenue compare to other single-family homes in Mamaroneck?

This single-family home is listed 46% below the average price for single-family homes in Mamaroneck and has been on the market for 50 less days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 2,030 sqft.

138 Knollwood Avenue is a 4-bedroom, 3-bath single-family home for sale in Mamaroneck NY 10543. On Prevu for 0 days at $1,100,000. This residence features 2,030 square feet of living space, located in Mamaroneck. The median listing price for single-family homes in this area is $1,087,500. Nearby schools include Mamaroneck Avenue Elementary School, Hommocks School Middle School, and Mamaroneck High School. Property amenities include private outdoor space, dishwasher, parking, and washer/dryer. View other single-family home listings in Westchester County.

The data relating to real estate for sale on this website comes in part from the IDX Program of OneKey™ MLS. The source of the displayed data is either the property owner or public record provided by non-governmental third parties. It is believed to be reliable but not guaranteed. This information is provided exclusively for consumers’ personal, non-commercial use. Information Copyright 2026, OneKey™ MLS. All Rights Reserved.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.