A library in Weston traces back to 1847 and the Weston Mechanics’ Institute was established in 1858. In 1912, Weston voted to establish a free public library board, which would take over the assets of the Weston Public Library Association created in 1909.

In 1913, the Carnegie Corporation grants the association $10 000 for the construction of a building. The site was chosen in August 1913 and two parcels of land were purchased for a total of $1950. Excavation began in April 1914 and construction progressed into the summer. The building is made from red bricks with clay from the John Price Brickworks in Toronto.

The library opened on December 29 1914. Local resident Peter White Lindsay (of Lindsay and Brydon) is the principal architect. The building is constructed in an Arts and Crafts style. It features 24 stained glass windows with the names of authors (Robert McCausland Limited) and mosaic panels in the Art Nouveau style (Italian Mosaic & Marble Company of Canada).

In 1967, the Weston Public Library Board is taken over by the York Public Library Board following the creation of the Borough of York. The library was then the Weston Branch of the York Public Library. In 1998, after the amalgamation of Toronto, the library became the Weston Branch of the Toronto Public Library.

The library underwent renovations in 1962 that included a redesigned foyer and suspended acoustic ceiling. In 1981-82, the building underwent a major renovation and expansion with tripled the size of the building, rather than being relocated to a new site. Brief renovations in 2005 included a refurbishment and new computers.

The building was designated as a heritage property in 1978 and a historical plaque was erected in 1979.

From the Plaque:

This building was erected in 1914 with a Carnegie Foundation grant to replace the Apprentices' Library at Old Dufferin Hall. Following the William Morris crafts movement, this Art Nouveau structure is an excellent example of all the crafts and skills of the area. As a utility building it is a memorial to the skills and dedication of its builders in the handling of their materials and is one of the last of its kind to so bear witness.

• - F. C. Henderson - Electric Lighting
• - Italian Mosaic & Marble Company of Canada
• - Kent-McClain Ltd. - Book Cases
• Architect - Dunlop-Farrow Architects Inc.  <-- More buildings by this architect.
• Architect - Lindsay, Brydon and Greig  <-- More buildings by this architect.
• Architect - Dunlop, Wardell, Matsui & Aitken Architects  <-- More buildings by this architect.
• Builder - George Sainsbury
• Floor installation - Sanitary Floor Co.
• Stained glass design - Robert McCausland