There's a reason "never again" is such a common phrase in home repair forums. Some jobs look simple on YouTube but are genuinely dangerous — or will cost you 3× more to fix after a DIY attempt goes wrong.
1. Electrical Panel Work
The electrical panel is the one area of your home where a mistake can kill you — not just injure you. Adding circuits, replacing breakers, or upgrading the main panel requires a licensed electrician. Period.
- •Risk: Electrocution, house fire, voided homeowner's insurance
- •Why pros are required: Most municipalities require permits + inspection
- •Cost to hire: $200–$600 for panel work; much less than the alternative
2. Gas Line Work
Anything involving your gas supply line — moving a gas stove, replacing a gas water heater, capping a line — requires a licensed plumber in NJ. A gas leak from improper fittings can cause carbon monoxide poisoning or an explosion.
3. Structural Changes (Load-Bearing Walls)
That wall you want to open up for an open-concept kitchen might be the wall holding up your roof. Removing a load-bearing wall without proper engineering can cause a partial or complete collapse. Always hire a structural engineer + licensed contractor.
4. Roof Replacement or Major Repairs
Beyond the obvious fall risk, improper roofing can void your roof warranty and homeowner's insurance. Small patches are manageable, but any work involving flashing, valleys, or replacing sections should go to a licensed roofer.
5. Major Plumbing (Sewer Lines, Water Main)
Replacing a toilet? Fine. Touching the main sewer line or water main? Stop. These require permits in most NJ municipalities. A mistake can contaminate your water supply or cause sewage backup into your home.
6. HVAC Installation
Central air or HVAC systems involve both electrical and refrigerant work. Handling refrigerant without EPA certification is actually illegal. Get a certified HVAC technician — many repairs are cheaper than you think.
7. Asbestos and Lead Paint Removal
If your home was built before 1980, there's a real chance of asbestos in insulation or lead in the paint. Disturbing these materials without proper containment is a serious health risk and an environmental violation. Always hire a certified abatement contractor.
🏡 For all of the above, Gygnus connects you with licensed, verified professionals in NJ and PA. Post your job free — it takes 2 minutes and you only pay when the work is done.
