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HaltonHillsIQ

Heritage property

10 Mary Street

10 Mary Street, Halton Hills, is listed on the Town of Halton Hills' heritage register but not designated.

Last checked October 8, 2026Town of Halton HillsHow we know
Publisher
Town of Halton Hills
Source dataset
Heritage Register (tables on the Town's Heritage Planning page)
Official record
Town of Halton Hills heritage register page
Retrieved
October 8, 2026
Licence
Content from the Town of Halton Hills website, reproduced with attribution as the site permits Terms
From the source
status under the Ontario Heritage Act · the description, reproduced verbatim
Derived by HaltonHillsIQ
position, matched by address to an official layer · nearby properties, parks and facilities
HaltonHillsIQ’s words
the summary sentence · what the status means
Kept current
Rebuilt by script from the tables on the city's heritage register page; the city's record is authoritative.
At a glance
Status
Listed, not designated
As the register records it
Listed
Name
Cleave House
Area
Georgetown
Register phase
Phase 3 (adopted June 20, 2016)
Where 10 Mary Street is10 Mary Street marked on the official boundary of Halton Hills.10 Mary Street
10 Mary StreetThe outline is the Town of Halton Hills boundary.

Why it is listed

Built by John Kennedy, nephew of George Kennedy after whom Georgetown is named; Representative of Georgian style architecture including gable roof with two chimneys, returned eaves, six-over-six windows with stone sills and large stone lintels, and rear garage addition

The Town of Halton Hills’ description, reproduced from its heritage register.

What the status means

On the register but not designated. Listing does not require a heritage permit for alterations, but an owner must give the Town 60 days' notice of an intention to demolish or remove a building or structure (Ontario Heritage Act, s. 27(9)).

Whether a specific alteration needs a heritage permit is the Town’s call; ask its heritage planning staff before starting work.

Sources

Every factual claim above traces to one of these documents.

  1. Town of Halton Hills

    Heritage Register (tables on the Town's Heritage Planning page)

    Retrieved October 8, 2026

  2. Statistics Canada

    National Address Register (June 2026), building points

    Retrieved October 8, 2026

  3. Town of Halton Hills

    Heritage Planning: the Heritage Register

    Retrieved October 8, 2026

  4. Town of Halton Hills

    Privacy Policy & Terms of Use

    Retrieved October 8, 2026

  5. Ontario Heritage Trust

    Ontario Heritage Act Register

    Retrieved October 8, 2026

  6. Government of Ontario

    Ontario Heritage Act, R.S.O. 1990, c. O.18

    Retrieved October 8, 2026

Content from the Town of Halton Hills website, reproduced with attribution as the site permits. Licence. Register checked October 8, 2026; the Town’s record is authoritative.