This extensively renovated estate sits on a private, gated 3.51 acres at Guelph Line and 20 Side Road in Campbellville, north of the 401, with 8,299 sq ft of living space over three levels plus a 914 sq ft guest house. The renovation brought new windows, new flooring and hardwood, and custom box ceilings throughout, and the home has 7 fireplaces and 4 kitchens. The main floor opens with a grand foyer, curved staircase and crystal chandelier, then flows to a vaulted office, formal dining room with fireplace and custom built-ins, a living room with windows on three sides , slab feature wall and linear Custom vented Napoleon fireplace, a custom bar with wine storage, and a chef's kitchen with an oversize island, stone countertops, full-height slab backsplash, farmhouse sink and a professional-style range. Walk out from the breakfast area to a two-level rear deck with glass railings. Upstairs are 5 bedrooms and 4 washrooms. The primary suite has its own snug sitting room with fireplace and a walkout to the front balcony, along with a bedroom fireplace, his and hers bathrooms, a walk-in closet and private laundry. The walkout lower level has 2 kitchens and 2 bedrooms, plus a games area, media wall, gym ( could be a 3rd bedroom ) and an in-law suite with its own bathroom, laundry and separate entrance. A detached guest house holds a 2-bedroom apartment with its own kitchen, bathroom, laundry and deck. With three self-contained living spaces on one property, parents, adult children and extended family can live close while keeping their own space. The solar-heated indoor pool makes swimming a year-round habit. Outside, two ponds, mature trees and a fire pit patio surround the home. Indoor parking for 8 vehicles, room for 10 more on the drive, and a wired generator. Flexible possession. Full upgrade list available. Private showings by appointment. Rooms on "Upper level" are in Guest house
12199 Guelph Line Milton On L0p 1b0 is located in Milton, ON (L0P 1B0).
12199 Guelph Line Milton On L0p 1b0 is listed for sale at $4,450,000.
This home offers 10 bedrooms and 8 bathrooms.
It is a home.
Annual property taxes are approximately $16,367 (2026).
Yes — 12199 Guelph Line Milton On L0p 1b0 includes 18 parking spaces.
Contact Barbara Beers and the Barbara Beers Real Estate team at +1-905-634-2335 or barbara@barbarabeers.com to book a private showing or request more details.

Royal LePage Burloak Real Estate Services
Purchase Price
Estimate only. Does not include property taxes, insurance, or fees. Actual rates may vary. Contact us for personalized mortgage guidance.
Listing Brokerage: REAL BROKER ONTARIO LTD.
Advertised By: Royal LePage® Burloak Real Estate Services
MLS®, REALTOR®, and associated logos are trademarks of CREA.
12199 Guelph Line Milton On L0p 1b0, Milton, ON, L0P 1B0
City: Milton
Price: $4,150,000 - $4,750,000
Type: Residential
Bedrooms: 10+
Bathrooms: 8+