781 rue William, Montréal

A property, built around 1900, on a 619 m² lot. 4 building permits since 1990. Listed in the inventory of heritage buildings built before 1940. Square Victoria-Oaci metro station is 550 m away. Older than 92% of the buildings on rue William.

Data as of October 29, 2026 · updated every week

Assessed, 2026 roll
$7,136,300
Welcome tax on that value
≈ $238,348
Dwellings
—
Built
≈ 1900
1 to check6 notes3 clear
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What stands out about 781 rue William

Compared with every address on the island of Montréal, from the assessment roll, Montréal open data and the STM timetable.

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What the records show for 781 rue William

Note

Built before 1970, not tested: the water service line may be lead

Free preview
What the record says
Built 1900 (year estimated by the assessor), 1 dwelling. No City screening test is published for this address. The City considers buildings with fewer than 8 dwellings built before 1970 likely to have a lead service line.
What it means
Replacing the private part of a lead service line is the owner’s responsibility and is mandatory in Montréal.
What to do
Ask the seller whether the service line was tested or replaced, or call 311 to ask whether the City has tested it.

The full report explains every finding like this one.

Check

In the inventory of heritage buildings built before 1940

What it means and what to ask
Note

4 building permits since 1990

What it means and what to ask
Note

A permit is filed under another civic number

What it means and what to ask
Note

Assessed at $7,136,300

What it means and what to ask
Note

Short-term rentals: principal residence only, June 10 to September 10

What it means and what to ask
Note

1 contaminated site within 100 m

What it means and what to ask
Clear

No notice of deterioration

Clear

No City right of first refusal

Clear

Not in a mapped flood zone

Part of a full report: what each record says, what it means and what to do

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  • What it means for a buyer
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Assessed value of 781 rue William

In the full report
2026-2028 roll$7,136,300
Previous roll$7,136,300

Welcome tax estimated with the City of Montréal’s 2026 brackets on the assessed value; the notary calculates it on the higher of the price and the adjusted value.

The building

UseOffice building
Lot area619 m²
Land use in the urban planMixed
Built area on the lot (City outlines, 2016)≈ 562 m²
Share of the lot under buildings≈ 91%
Frontage, cadastre and owner since

Permits for this address · 4 since 1990

In the full report
Jan 2023 · Renovation or alteration
3 more permits in the full report

Street and trees

City trees in front2 · Kentucky Coffeetree
BoroughVille-Marie
Water main breaks repaired within 35 m (1972–2017)None recorded

Metro and bus near 781 rue William

Nearest metro: Square Victoria-Oaci (Orange line)550 m
Robert-Bourassa / William · 74, 168, 777, 87274 m
Robert-Bourassa / William · 74, 168, 777, 872130 m
Robert-Bourassa / Ottawa · 74182 m
To downtown (McGill station) by metro and bus, weekday morning≈ 17 min

Public schools near 781 rue William

French-language public elementary schoolÉcole De la Petite-Bourgogne, 1.4 km
English-language public elementary schoolÉcole F.A.C.E., 1.5 km
French-language public secondary schoolÉcole FACE, 1.5 km
English-language public secondary schoolÉcole F.A.C.E., 1.5 km

The nearest school of each kind in a straight line, not the school of the address: each school service centre (French) and school board (English) sets its own territories, so ask it. English public schools require a certificate of eligibility under the Charter of the French language. Source: Ministère de l’Éducation du Québec.

Building activity nearby

Construction permits within 300 m, 2 years0
Demolition permits within 300 m, 2 years0

In Ville-Marie, the borough issued 37 construction permits and 26 demolition permits in the last two years. About the borough

Life around 781 rue William

City 311 requests within 150 m, last 12 months122 · dumped items and cleanliness 62, streets, sidewalks and lights 45, snow clearing 4
Ground-floor shops within 500 m291 · restaurants and cafés 90, grocery and daily shops 20, other shops 39, services 118, bars, entertainment and hotels 24
Empty storefronts within 500 m17%
Nearest food shopIGA, 80 m
Playground100 m
Dog run460 m
Public poolPiscine du YMCA Centre-Ville, 1.2 km
Wading pool or splash padJeux d'eau Saint-Jacques, 860 m
Outdoor skating rink1.4 km
LibraryGrande Bibliothèque - Bibliothèque et Archives nationales du Québec, 2.0 km

Ville de Montréal open data: 311 requests are counted around the address, never tied to one home; shops come from the City’s survey of ground-floor commercial premises; distances are in a straight line.

The neighbourhood in the 2021 census

People in this census area (2021)2,281
Median age32.4 (island of Montréal 39.6)
Median household income (2020)$79,000 (island of Montréal $66,500)
Households that own their home35% (island of Montréal 42%)
Moved here in the last five years84% (island of Montréal 44%)
Children under 156% (island of Montréal 15%)
People 65 and over4% (island of Montréal 18%)
People who speak French and English77% (island of Montréal 60%)
People who speak French only6% (island of Montréal 25%)
Adults 25 to 64 with a bachelor’s degree or higher73% (island of Montréal 45%)
Workers who take transit to work21% (island of Montréal 26%)
Homes that are single-detached houses0% (island of Montréal 14%)
Homes in buildings of five storeys or more96% (island of Montréal 15%)
Homes built in 1960 or before8% (island of Montréal 35%)

Figures for the census dissemination area that contains the address (a few blocks, usually 400 to 700 people), with the whole city in brackets. Source: Statistics Canada, 2021 Census of Population.

Crime near 781 rue William

In the full report

In the full report: incidents reported to the SPVM within 300 m over the last 12 months, by type.

Questions about 781 rue William

What is 781 rue William assessed at?

$7,136,300 on the 2026-2027-2028 assessment roll. The previous roll had it at $7,136,300. More

How much is the welcome tax for 781 rue William?

About $238,348 on its assessed value of $7,136,300. The tax is calculated on the highest of the price paid, the value in the deed and the adjusted assessed value, so the real amount may be higher. More

When was 781 rue William built?

Around 1900, according to the assessment roll (estimated year).

Is 781 rue William in a flood zone?

No. It is not in a flood zone mapped by the Quebec government. More

Does 781 rue William have a notice of deterioration?

No. The Ville de Montréal has registered no notice of deterioration on this building. More

Is 781 rue William a heritage building?

It is in the City’s inventory of buildings built before 1940. It is not protected, but some work may need a review. More

Can 781 rue William be rented short term (Airbnb)?

Only as the owner’s or tenant’s principal residence, from June 10 to September 10, 31 days at most, with a yearly City permit and a CITQ registration number. More

What building permits has 781 rue William had?

The City has issued 4 permits since 1990. The latest, from Jan 2023: travaux intérieurs. More

How far is the nearest metro station from 781 rue William?

Square Victoria-Oaci is 550 m away in a straight line.

How long does it take to get downtown from 781 rue William?

About 17 minutes by metro and bus on a weekday morning to McGill station, with the walk to the stop, according to the STM timetable.

Other addresses on rue William

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Checked against Montréal open data and the Quebec assessment roll on October 29, 2026. Lot outlines come from the City’s assessment units and have no legal value; the certificate of location decides.