Welcome to 21 Old Mill Street A Grand Estate on 16 Private Acres with Over 8,100 Sq Ft of Living Space! Experience the perfect blend of luxury, functionality, and endless opportunity in this impressive 6-bedroom residence. Nestled on a quiet street with easy access to Hwy 403, this custom-built home offers over 8,100 sq ft of finished living space and is ideally suited for multi-generational living or the business owner seeking yard space and a home office.The home features a terrific in-law setup with a separate entrance, providing privacy and flexibility for extended family or business use. Inside, you're greeted by a grand foyer and an expansive open-concept main floor with 9 ceilings, granite countertops, and 250+ pot lights throughout for a bright, upscale ambiance.The sumptuous primary suite and three additional bedrooms on the main level provide space and comfort, while the fully finished lower level offers a home theatre, rec room, gym space, and more. A four-car detached garage, both drilled and dug wells, and an oversized septic system round out this one-of-a-kind estate. With 16 acres of land, the possibilities for outdoor enjoyment, hobby use, or future development are limitless.
For sale
C$2,388,888
21 Old Mill St, Brant, ON N3L 3J9
6beds
5baths
Single Family Residence
Built in ----
17.76 Acres Lot
$-- Zestimate®
C$--/sqft
C$-- HOA
What's special
Quiet streetCustom-built homeGrand foyerOpen-concept main floorGranite countertopsPrimary suiteFully finished lower level
- 49 days
- on Zillow |
- 14 |
- 1 |
Zillow last checked: 7 hours ago
Listing updated: June 09, 2025 at 02:35pm
Listed by:
ROYAL LEPAGE ASSOCIATES REALTY
Source: TRREB,MLS®#: X12208112
Originating MLS®#: Toronto Regional Real Estate Board

Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 6
- Bathrooms: 5
Heating
- Forced Air, Gas
Cooling
- Central Air
Appliances
- Included: Bar Fridge, Built-In Oven
Features
- In-Law Capability, Storage, Storage Area Lockers
- Flooring: Carpet Free
- Basement: Finished with Walk-Out
- Has fireplace: Yes
- Fireplace features: Natural Gas
Interior area
- Living area range: 3500-5000 null
Property
Parking
- Total spaces: 24
- Parking features: Available
- Has garage: Yes
Features
- Patio & porch: Porch
- Exterior features: Privacy
- Pool features: None
- Waterfront features: None
Lot
- Size: 17.76 Acres
- Features: Irregular Lot
Details
- Parcel number: 320090139
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Bungaloft
- Property subtype: Single Family Residence
Materials
- Stone
- Foundation: Concrete
- Roof: Shingle
Utilities & green energy
- Sewer: Septic
Community & HOA
Location
- Region: Brant
Financial & listing details
- Annual tax amount: C$7,960
- Date on market: 6/9/2025
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