You will need a permit if you plan to ...
erect, construct, enlarge, repair, improve, alter, cover or extend any building or structure
move any building or structure
demolish a structure
install, alter or repair any electrical wiring or equipment
install, alter or repair sanitary plumbing, water supply or gas supply system
install, alter or perform major repairs on any boiler, pressure vessel furnace, steam-situated machinery or heat producing apparatus, including the piping
erect, remodel, repair, alter or remove any sign
erect, alter or repair an awning
install, alter or repair any air-conditioning or refrigeration or apparatus
install a swimming pool
You will not need a permit if you plan to ...
install, alter or repair a garage door in an existing building
repair or perform general maintenance
repair or replace a roof on a structure under 200 square feet size
have telephone communication utilities installed