Restoration Register

Heritage conservation services in Ontario

Conservation sits between the consultant who writes the report and the trade who does the work. It is the technical end: assessing what a material is actually doing, testing before intervening, and specifying the least intrusive treatment that will hold.

The firms listed here take a materials-first approach: condition assessment, mortar and finish analysis, treatment trials, and conservation of specific features rather than general contracting. On a complex or high-value building, engaging a conservation specialist before the trades are hired usually saves money, because the specification then tells every contractor what mortar, what coating and what method, rather than leaving each of them to choose. For a full heritage impact assessment, a conservation plan or a permit application, the consultants and heritage architects listed separately on this site are the right starting point, and many of them work alongside the firms here.

What to ask before you hire

  1. What testing do you propose before treatment? Mortar analysis, paint stratigraphy and treatment trials are the normal opening moves.
  2. Will you produce a specification the trades can price? A specification that contractors can bid against is what makes the engagement pay for itself.
  3. Do you work with a heritage architect or consultant, or should I engage one separately? For permits and impact assessments the two roles are different.
Grant funding

Several municipal programs fund professional and technical fees alongside construction, and some fund a conservation study on its own. Ask heritage staff what proportion of professional fees your program allows before commissioning work.

Across Ontario

All heritage service pages · Grants by municipality