All properties that are either individually designated (See "Property Designation") or located within a heritage conservation district (See "Heritage Districts") are subject to the City’s Site Plan Control By-law for larger development projects or a Heritage Permit Application [PDF] for more minor projects.

The following information summarizes the type of approval required depending on the size and location of the project.

  • Interior Alterations
  • Exterior Addition/Alterations or a New Building over 50m2 in Size
  • Exterior Alterations between 20m2 and 50m2 in Size
  • Exterior Alterations less than 20m2 in Size
  • Heritage Permit Application

1. Interior Alterations

  • Any interior alterations that do not affect the exterior of the building do not require review by Heritage Markham or the Planning Department (unless a specific interior feature is identified in a designation by-law).
  • If interior alterations are contemplated, the City’s Building Standards Department should be contacted to assess whether a Building Permit is required.

2. Exterior Addition/Alterations or a New Building  over 50m2 in Size

  • Any addition to a building that is over 50m2 in size requires site plan approval through the Planning Department.
  • There is an application fee, and a site plan and elevation drawings would be required.
  • The application would be circulated to City departments, Heritage Markham and any appropriate external agencies for comment.
  • Residential- If approved, a short version, residential site plan agreement is prepared by the Legal Department and includes any specific City requirements (grading, tree preservation, design).
  • Non-residential- A standard site plan agreement is prepared by the Legal Department.
  • A letter of credit or other form of financial security is required to be deposited with the City to ensure the work is undertaken as per the approved plans.
  • A Building Permit application can be submitted once site plan approval is obtained.

3. Exterior Alterations or a New Building between 20m2 and 50m2 in Size

  • Any addition or alterations or new building meeting this criterion requires Minor Site Plan Approval through the Planning Department.
  • The application fee is minimal, and a site plan and elevation drawings are required.
  • The application is circulated to Heritage Markham and the Zoning Section for comment.
  • If approved, a simple ‘sign-back’ site plan approval letter is prepared by Heritage Section staff and would include any specific City requirements (usually design related).
  • A letter of credit or other form of financial security is usually required to be deposited with the City to ensure the work is undertaken as per the approved plans
  • A Building Permit application can be submitted once Minor Site Plan Approval is obtained.

4. Exterior Alterations less than 20m2 in Size Fronting onto a Street

  • Enlargement or modifications less than 20m2 in size that materially alters the elevation fronting onto a street (e.g. a front veranda) requires Minor Site Plan Approval through the Planning Department.
  • The application fee is minimal, and a site plan and elevation drawings are required.
  • The application is circulated to Heritage Markham and the Zoning Section for comment.
  • Once approved, a simple ‘sign-back’ site plan approval letter is prepared by Heritage Section staff and would include any specific City requirements (usually design related).
  • A Building Permit application can be submitted once Minor Site Plan Approval is obtained.

5. Heritage Permit Application

This permit form is only used when minor alterations are proposed that do not require any other permits or planning approvals. Typical projects requiring a Heritage Permit include:

  • New or different wall cladding or roof treatment
  • Painting
  • Masonry cleaning and repointing
  • New or different windows or doors
  • Changes to architectural decorations (i.e. Verandas, trim, soffits, fascia, etc.)
  • Front yard patios, lamp installations, awnings
  • Mechanical equipment
  • Structural repairs that effect the external appearance
  • Fences

A Heritage Permit Application [PDF] is available here.

A Heritage Permit is not required for:

  • General repairs to  weather-stripping, eavestroughs, roofs, chimneys, fences, existing cladding
  • Repair of broken window panes to original specifications
  • Backyard patios, garden sheds, gazebos and other small outbuildings that are not readily visible from the street (and which do not require a Building Permit)
  • Planting and removal of vegetation on private property (tree removal requires a separate permit)
Complementary Content
${loading}