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City in Ontario

New homes for sale in St. Marys

16 of St. Marys’s 62 homes for sale are new construction. Their median asking price is $555,444. Pre-construction homes appear here once they are listed on MLS®.

family-friendly quiet community-oriented

7,386 people lived in St. Marys at the 2021 Census, in 3,125 households. 81% of households owned their home and 19% rented. The most common homes were single-detached houses (70%) and low-rise apartments (12%). 55% of homes were built before 1981, and 15% since 2011. 91% of commuters went to work by car and 0% by public transit.

Walkability score: 20

St. Marys, Ontario

New Build Homes in St. Marys

Day to dayLivability

Walkability

out of 100 · averaged over 939 past and present listings

Average walk score reported on listings here

7.2

Schools near listings

out of 10 · averaged over 939 past and present listings

Fraser Institute ratings within 2 km of each listing, closer schools weighted more

Each score is an average over this area's own listings and is shown only where at least 5 of them carry one. Scores are reported by listing agents, not measured by HOMEH.

What it costsAffordability

Median asking price

$639,450

11% below Ontario

In St. Marys

$639,450

In Ontario

$716,900

Median monthly rent

$1,750/mo

30% below Ontario

In St. Marys

$1,750

In Ontario

$2,499

$534

Per square foot

≈ 30.5 years

Of rent to match the purchase price

On the marketMarket snapshot

For sale

Median $639,450

Houses 50 · Condos 12

For rent

Median $1,750

Condos 1 · Houses 1

Recently sold

Recently leased

Market data as of 2026-08-16. Sold and leased figures are neighbourhood medians over the last 12 months, published only where at least 5 homes closed — never a single sale.

The honest readPros & cons

What people love

Lower median sale price than provincial average
Quiet and peaceful living environment
Access to parks for outdoor activities

Keep in mind

Limited public transit options
Walkability score is low
Few amenities like cafes and libraries

The feel of the placeLifestyle

Daily life in St. Marys is relaxed, with a focus on community and outdoor spaces. Residents enjoy a slower pace with essential services nearby.

Great for first-time buyers families those seeking a peaceful lifestyle

Within the boundaryWhat's nearby

The boundary

12.9 km²

Every count and every census figure on this page was measured inside this line — not within a circle drawn around a centre point.

Parks

Playgrounds

Transit stations

Grocery stores

Restaurants

Cafés

Gyms

Libraries

Pharmacies

Counted across all 12.9 km² of St. Marys. From OpenStreetMap, as of 2026-10-12.

The schoolsWhich schools, and how they rate

7.2/10

Average rating of the 3 rated schools in this area

Elementary

Secondary

St Marys D.C. & V. I. High School
Public · Grades 9–12 · Avon Maitland DSB
7.3/106.9 over 5 yrs
158th of 742 Ontario secondary schools
430 students · EQAO 2024-2025
Holy Name of Mary School
Catholic · Grades JK–8 · Huron Perth CDSB
7.1/106.7 over 5 yrs
808th of 3,045 Ontario elementary schools
205 students · EQAO 2024-2025
Little Falls Public School
Public · Grades JK–6 · Avon Maitland DSB
7.1/106.4 over 5 yrs
808th of 3,045 Ontario elementary schools
450 students · EQAO 2024-2025
St Marys D.C. & V.I. - Elementary
Public · Grades 7–8 · Avon Maitland DSB
Not rated
125 students

Ontario Ministry of Education school registry; ratings from the Fraser Institute report card. These are the schools that stand inside St. Marys, not a catchment — most Ontario boards do not publish attendance boundaries, and we will not draw a line we cannot source. Confirm enrolment with the school board before you buy.

The peopleWho lives here

7,386

Population (2021)

12.4 km²

Area

594

People per km²

48.7

Median age

$86,244

Median income

81%

Own their home

2.3

People per household

3,125

Households

Every age

Children (under 15)14.5%
Working age (15–64)59.2%
Seniors (65+)26.4%

What is built here

Detached houses69.6%
Semi-detached9.6%
Townhouses5.9%
Duplexes1.9%
Low-rise apartments12%
High-rise apartments1.1%

Own or rent

81%Owners

19%Renters

Across 3,125 households

When it was built

Mostly 1960 or earlier

1960 or earlier38%
1961–198017%
1981–19907%
1991–200012%
2001–20055%
2006–20106%
2011–20157%
2016–20218%

Share of occupied homes, by the era they were built in. Bars are drawn against the busiest era, not against each other, because the eras are not the same length. The eight shares are unlikely to total exactly 100: Statistics Canada rounds each era's count to the nearest 5 before publishing it, so we print what the census reports rather than adjusting a figure to make the column add up.

8.4%
Born outside Canada: 18.4%
Hold a degree or higher: 53.5%
Employment rate: 0%
Commute by transit: 91%
Commute by car: 1.8
Children per family: $76,410
Median income after tax: $100,142
Average household income: 7.6%
Living on a low income: $943/mo
Renters pay, per month: $1,053/mo
Owners pay, per month: $498,624
Median home value at census: 8.7%
Renters spending 30%+ of income on housing: 8.6%
Owners spending 30%+ of income on housing

Statistics Canada, Census of Population 2021. Added up from 12 census areas inside the boundary. Medians and rates are a population-weighted average of dissemination-area figures.

Sources: HOMEH listings, Statistics Canada, Census of Population 2021, OpenStreetMap, HOMEH school registry, Photo: © Wikimedia Commons contributors (CC BY-SA)

Questions, answered

Common questions about new homes for sale in St. Marys

How many homes in St. Marys are new construction?

16 of the 62 homes for sale in St. Marys are new construction.

All homes for sale in St. Marys

How does new construction affect home prices in St. Marys?

Their median asking price is $555,444, 13% less than the $639,450 median of all homes for sale in St. Marys.

All homes for sale in St. Marys

Keep looking

More Homes for Sale in St. Marys

62 homes are for sale in St. Marys. Browse by neighbourhood or home type below — and get the industry's highest Cashback Rebate when you buy with HOMEH.