Lionel Morrell said he was a member of the National Trust classification and building advisory committee when the street, including the advertised properties, were listed on the register.

Mr Morrell said, at the time, the process was considered to be the most extensive classification process ever undertaken by the committee for the National Trust.

A letter detailing the study was sent to Tasmanian Heritage Council chairwoman Brett Torossi, Heritage Minister Matthew Groom and Treasurer Peter Gutwein.

"The process included research of valuation rolls and other archive material to establish a detailed history of each place, builders, architects and inhabitants," Mr Morrell wrote.

"From surveys of the street, and photographs, architectural descriptions were prepared, formulating a statement of significance.

"All owners and occupants were contacted formally by letter prior to the conclusion of the research, and none of the owners objected to the entry of their property on the National Trust's Register and nomination to the Launceston City Council's Heritage List."

Ms Torossi said she had access to the reports.

"A wide range of relevant records available to the Heritage Council were considered as part of the recent assessments of entries on the Tasmanian Heritage Register," Ms Torossi said.

"The 'intention to remove' process is designed to provide affected property owners and the public with the opportunity to furnish any additional information that they think will assist the Heritage Council to make informed decisions.

"The Tasmanian Heritage Council is completing its consultation with the Launceston community and at the same time has begun the process with affected property owners in Hobart."