The stone bridge over the Thames in St. Marys, with the stone town hall and water tower beyond

Town of St. Marys

St. Marys homes for sale and Stonetown guide

They call St. Marys the Stonetown: about 7,400 people where Trout Creek meets the North Thames, in a town built from its own limestone. It sits about 32 km from downtown London and 18 km from Stratford as the crow flies, with its own hospital, high school and VIA stop. Buyers come for older stone and brick homes, and for a quarry you can swim in.

See the 41 homes for sale What is my home worth?

Homes for sale now: 41
Median asking price: $649,000
Asking price range: $310K to $4.25M
Most listed home type: Detached

For sale in St. Marys right now

See all 41 with filters

New
$775,000
57 Parkhaven Crescent
St. Marys, Detached
3 beds3 baths1,100-1,500 ft²
MLS® X14029080Compare 57 Parkhaven Crescent
$1,489,888
152 St Andrew Street N
St. Marys, Detached
3 beds2 baths2,000-2,500 ft²
MLS® X13865816Compare 152 St Andrew Street N
Open Sat, Oct 17, 10:30 am
$309,900
428 Queen Street W, Unit 26
St. Marys, Condo townhouse
2 beds1 bath800-899 ft²
MLS® X13854272Compare 428 Queen Street W, Unit 26
Open Sat, Oct 17, 10:30 am
$329,900
428 Queen Street W, Unit 33
St. Marys, Condo townhouse
1 bed1 bath700-799 ft²
MLS® X13854268Compare 428 Queen Street W, Unit 33
Open Sat, Oct 17, 10:30 am
$359,900
428 Queen Street W, Unit 31
St. Marys, Condo townhouse
1 bed1 bath800-899 ft²
MLS® X13854266Compare 428 Queen Street W, Unit 31
$529,000
201 Hooper Street
St. Marys, Townhouse
3 beds2 baths1,100-1,500 ft²
MLS® X13834446Compare 201 Hooper Street
$699,900Price changed
131 Guest Court
St. Marys, Detached
2 beds2 baths1,100-1,500 ft²
MLS® X13800188Compare 131 Guest Court
$399,900
86 Salina Street N
St. Marys, Detached
3 beds1 bath1,100-1,500 ft²
MLS® X13799222Compare 86 Salina Street N
$735,000
332 Widder Street E
St. Marys, Detached
2+1 beds3 baths1,100-1,500 ft²
MLS® X13793310Compare 332 Widder Street E

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Listing data provided under copyright by the London and St. Thomas Association of REALTORS® and other participating boards via PropTx Amplify Syndication. Information is deemed reliable but not guaranteed accurate. Only active listings are shown.

Why is St. Marys called the Stonetown?

Because the town was built from what lay under it. The Canada Company surveyed the site in 1839 where Trout Creek meets the North Thames, with water power for mills and limestone to quarry, and a company director named it after his wife. The Grand Trunk made it a rail junction in 1858, and its stone bridges still stand; the high Sarnia Bridge over the Thames now carries the Grand Trunk Trail.

The stone is everywhere downtown. The town hall dates from 1891, and the St. Marys Museum at 177 Church Street South occupies a limestone house George Tracy built in 1854, nicknamed the Castle in the Bush because it towered over the village's log shanties. The Town's heritage register records small limestone cottages from the 1860s and 1870s set into hillsides in the north ward, some with a lower storey opening out the back, and the 1898 Water Street Bridge, a steel Pratt truss over the Trout Creek valley.

What housing will you find in St. Marys?

Mostly owner-occupied detached houses, with a real share of older ones. The 2021 Census counted 3,125 occupied dwellings in the town: about 70% single-detached, 10% semi-detached, 6% row houses and 12% low-rise apartments, and 81% of households owned their home. Close to 38% of the town's dwellings went up before 1961 and roughly a quarter after 2000, so the choice runs from limestone cottages to newer houses on the edges of town. To see what is for sale today, look at the houses listed in St. Marys or everything on the market in town, on a map.

Can you really swim in a quarry in St. Marys?

Yes. The Town runs the St. Marys Quarry as a public swimming spot. It was worked for limestone until 1920, filled with water naturally between 1930 and 1935, and the Town bought it with 50 acres of surrounding land in 1945. The water is 10 to 32 feet deep with no shallow end, so children face strict supervision rules. The separate West Quarry is used for fishing and paddling.

Milt Dunnell Field at 1 Veterans' Circle looks over the Thames and Trout Creek, and Cadzow Park on Church Street South has a splash pad and pavilion. The Canadian Baseball Hall of Fame and Museum sits at 386 Church Street South, and the Pyramid Recreation Centre has two ice pads and a four-lane, 25-metre pool.

What about schools, the hospital and getting to London?

The Avon Maitland District School Board runs Little Falls Public School (JK to Grade 6) at 25 Lindsay Atkinson Drive and St. Marys DCVI (Grades 7 to 12) at 338 Elizabeth Street. The Huron-Perth Catholic board runs Holy Name of Mary Catholic Elementary School at 161 Peel Street. Each board sets its own boundaries, so check with the board for a particular address.

St. Marys Memorial Hospital at 267 Queen Street West is part of the Huron Perth Healthcare Alliance. Highway 7 skirts the south side of town on its way between Highway 4 at Elginfield and Stratford, the station on James Street North is a stop on VIA Rail's Toronto to Sarnia corridor, and PC Connect regional buses link the town with Stratford and London; check current routes and schedules.

What should buyers check before firming up an offer in St. Marys?

Three local rules shape what you can do with a house here; we check each with buyers.

Heritage district: the HCD, created by by-law 32-2010 in June 2010, runs from Trout Creek and the Thames east to Peel Street and south to Elgin Street, including Queen and Water Streets and the old millrace. It holds over 151 properties, and the Town has designated others individually; alterations to designated properties go through a heritage permit application.
Listed properties: some non-designated properties also sit on the register, so ask the Town about an address before you plan major changes.
River lots: the Upper Thames River Conservation Authority can require a permit for work in floodplains and river valleys under Ontario Regulation 41/24, which matters near the confluence.

Questions about St. Marys

Something else? Ask Rob or George directly.

How far is St. Marys from London?

As the crow flies, downtown London is about 32 km away and downtown Stratford about 18 km. PC Connect regional buses also serve the town, so check current routes and schedules.

When is the St. Marys Quarry open?

It is a summer facility, open daily through the swimming season. The Town posts each season's dates and hours on its St. Marys Quarry page.

Does St. Marys have a train station?

Yes. VIA Rail's Toronto to Sarnia service stops at St. Marys station on James Street North. Check VIA's timetable for current departures.

Which nearby towns do St. Marys buyers compare?

Most compare it with Stratford, about 18 km northeast as the crow flies, and with Thorndale and Lucan on the London side.

Near St. Marys

Buying, selling, or just curious?

Call Rob or George directly, or send a message and one of them will get back to you. A home evaluation is free and prepared by a person, never a formula.

What is my home worth?Send a message

St. Marys homes for sale and Stonetown guide

Why is St. Marys called the Stonetown?

What housing will you find in St. Marys?

Can you really swim in a quarry in St. Marys?

What about schools, the hospital and getting to London?

What should buyers check before firming up an offer in St. Marys?

Three local rules shape what you can do with a house here; we check each with buyers.

Heritage district: the HCD, created by by-law 32-2010 in June 2010, runs from Trout Creek and the Thames east to Peel Street and south to Elgin Street, including Queen and Water Streets and the old millrace. It holds over 151 properties, and the Town has designated others individually; alterations to designated properties go through a heritage permit application.

Listed properties: some non-designated properties also sit on the register, so ask the Town about an address before you plan major changes.

River lots: the Upper Thames River Conservation Authority can require a permit for work in floodplains and river valleys under Ontario Regulation 41/24, which matters near the confluence.