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161 Union Street

911 - Almonte / Mississippi Mills, ON K0A 1A0

ActiveFor Sale
5 Beds
4 Baths
3,500 Sq Ft
Single Family Home

About This Property

Welcome to the iconic William Thoburn House, a heritage-designated stone home by architect M.B. Aylesworth, on a picturesque nearly 1AC lot, steps from the Mississippi River. With 4685 sqft of above-ground living space (per MPAC), this home offers a rare blend of grandeur & enduring craftsmanship. Meticulously restored & carefully modernized, it is fully prepared to welcome its next family. Soaring ceilings, rich HW floors & intricate original details including crown mouldings, decorative trim & restored stained-glass window (2025) & a sweeping period staircase w/ exquisite millwork anchors the dramatic foyer. The 11ft ceilings continue through the great rm, living rm & dining rm. The great rm features a bay window, ornamental ceiling medallions, pocket doors & an elegant fireplace w/ intricate mantel. The kitchen features w/ tongue-and-groove cabinetry, detailed farmhouse-style sink, Thermador gas range, new fridge & dishwasher & a tucked-away butler's pantry. A mudrm w/ heated floors, floor-to-ceiling cabinetry & inside access to the double garage. Upstairs, the primary suite offers a large bay window, ample closet space, 10ft ceilings & an updated ensuite w/glass walk-in shower. The 10ft ceiling secondary bdrm features an arched window w/ Juliette balcony, crown moulding, hearth detail, walk-in closet. A generous third bdrm, period-inspired main bath w/ clawfoot tub, heated floors & a dedicated home office w/ 9ft ceilings complete the level, along w/ convenient second-floor laundry. The third-floor loft showcases exposed brick & includes 4th & 5th bdrms, the latter w/ its own ensuite. An oversized garage includes unfinished loft space, perfect for a home gym, featuring an arched window. The private backyard retreat offers a deck, stone patio, gazebo, mature hedges, curated gardens & professionally landscaped grounds. Walk to shops, restaurants, parks, schools & amenities. A rare opportunity to own a truly one-of-a-kind historic estate. 24 hrs irrev on all offers.

Property Details

StatusActive
Property TypeSingle Family Home
Listing TypeFor Sale
Interior Size3,500 sq ft
Bedrooms5
Bathrooms4
Postal CodeK0A 1A0
Last UpdatedAug 23, 2026 · 9:39 p.m.

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Features & Amenities

  • View
  • Fireplace
  • Air Conditioning
  • Basement

TRREB MLS® Attribution

MLS® X13474458

Listed by ROYAL LEPAGE TEAM REALTY

The trademarks MLS®, Multiple Listing Service® and the associated logos are owned by The Canadian Real Estate Association (CREA) and identify the quality of services provided by real estate professionals who are members of CREA. The trademarks REALTOR®, REALTORS® and the REALTOR® logo are controlled by CREA and identify real estate professionals who are members of CREA. Listing data provided by the Toronto Regional Real Estate Board (TRREB). The information contained herein is from sources believed to be reliable but is not guaranteed. Information deemed reliable but not guaranteed accurate by TRREB or Team Filipe / RE/MAX.

$1,695,000

asking price

MLS®X13474458
TypeSingle Family Home
CityMississippi Mills
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Team Filipe · RE/MAX · (647) 210-6070

Mortgage Estimate

Est. Monthly Payment

$8,277

/month · $1,356,000 mortgage

Down Payment20% — $339,000
Interest Rate5.5%

Amortization

Total Interest

$1,127,073

Total Cost

$2,483,073

Estimate only. Based on Canadian semi-annual compounding, 25-yr amortization at 5.5%.

Full Mortgage Calculator →

Listed By

ROYAL LEPAGE TEAM REALTY