There are currently two plaques installed in the front yard at Lambton House. In addition, there is a plaque dedicated by Heritage York, recognizing the Davenport Trail, installed on the grounds of St. Matthew Catholic Church on Old Weston Road.
In 1993, Lambton House was the focal point for the City of York Bicentennial. The City of York installed a plaque celebrating Lambton House. It was unveiled on August 29th during the celebrations taking place at the site.
On May 28th, 1995, Heritage York dedicated a plaque to commemorate the Davenport Trail. The plaque is located at St. Matthews Catholic Church on Old Weston Road. Here is a copy of the text stated on this plaque.
On October 4th, 1997, a Historic Sites and Monuments Board of Canada plaque commemorating Sir William Pearce Howland as a figure of national significance was unveiled. Susan Shaw, a Howland descendant and curator of the Howland House in Plymouth, Mass., attended with her husband.