Common projects that DO NOT require a building permit:
a. Building an uncovered platform or deck where the deck isn't attached to a residential building and doesn't exceed a specified height
b. Mounting a skylight in a building that does not exceed 3 floors
c. Re-cladding a building that doesn't exceed 3 floors with non-combustible material
d. Installing or replacing a sump pump, cooling and heating systems, air purifiers and other similar home appliances
e. Adding or replacing insulation, a furnace or a boiler
f. Replacing windows, doors or existing roofing materials, provided no structural work is required
g. Repairing and replacing plumbing fixtures"