Hazardous systems are a clear stop
Electrical distribution, gas, structural alteration, chimney/fire systems, contaminated water, major mold and many powered systems call for qualified help.
Height and access matter
A simple task becomes high-risk when it requires roof access, unstable ladders, confined spaces or work near live traffic/equipment.
Permits and licences matter
Jurisdictions can restrict who may perform certain work or require permits and inspection.
There is no shame in a handoff
Good home ownership includes knowing what information to collect before calling the right professional.
Safety boundary. General planning information only. Do not open, dismantle or work on hazardous electrical, gas, structural, fire-protection or contaminated-water systems unless you are appropriately qualified and authorized.