For sale

$3,799,000

Est. $16,182/mo —

•

9 ba

•

View

sq ft

166 Arnold Ave, Thornhill, ON L4J 1B7

About this home

A rare opportunity to own a distinguished estate on prestigious Arnold Avenue in the heart of Prime Old Thornhill. Set on an exceptional 100 x 160 ft lot, this stately stone-front two-storey residence offers 5 spacious bedrooms, 9 washrooms, soaring ceilings, and an abundance of natural light. Multiple skylights enhance the bright, elegant interior, while expansive principal rooms are designed for refined family living and grand entertaining. A 3-car garage, circular interlocked driveway, and secondary service entrance add exceptional functionality. The private, sun-filled backyard creates a serene setting with outstanding privacy. Nestled on one of Thornhill's most prestigious streets, this remarkable estate offers timeless elegance in an unrivalled location.

Single-familyProperty Type

0.34 acresLot Size

11 spacesParking

Listing updated: Nov 6, 2026 at 08:32pm

Redfin checked: a minute ago

•Source:TREB #N14108462

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Around this home

Schools

1.0km

Blessed Scalabrini Catholic Elementary School

Public, JK-8 • Assigned

1.4km

St Elizabeth Catholic High School

Public, 9-12 • Assigned

Provided by Local Logic

Lifestyle

Provided by Walk Score and Local Logic

Property details

Interior
Exterior

Kitchen

Bathroom

Living

Interior features
Central vacuum
Fireplace
Finished basement with walk-out access

Heating & cooling
Natural gas forced-air heating
Central air conditioning

Sale and tax history for 166 Arnold Ave

Sale History
Tax History

Date

Event

Price

TREB #N14108462

Oct 22, 2026

Listed

$3,799,000

TREB #N11917166

May 29, 2025

Delisted

—

Jan 9, 2025

Listed

$4,599,999

+35

A Remarkable Estate In The Sought-After Community Of Thornhill. Sitting On An Impressive 100.36 Ft X 159.74 Ft Lot, This 5 Bedroom Home Offers A Wealth Of Potential And Character. Features An Elegant Formal Living And Dining Rooms, A Cozy Family Room, And A Generously Sized Kitchen. Bright Breakfast Area Overlooking Beautifully Landscaped Gardens. Primary Bedroom Ensuite Includes a Jacuzzi Tub, His & Hers Sinks, and Bidet. Hardwood Flooring Throughout, Home Office, Fitness Room, Sauna, And A Three-Car Garage With Ample Storage. Huge Backyard Perfect For Outdoor Entertainment. Walking Distance To Synagogues, Promenade Mall, Grocery Stores, Public Transit, All Major Banks, Community Center and Much More. This Property's Rare Combination Of Lot Size, Character, And Location Makes It An Exceptional Find.

Public record

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Finished Sq. Ft.

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Style

Single Family Residential

Region

York Region

Parking Spaces

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Last updated by owner on Aug 9, 2023.

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