6 Projects That Require Permits (But Most People Skip)

DIY home improvement can be exciting—and often cheaper than hiring professionals. But what many homeowners don’t realize is that some projects legally require permits, even if they seem minor. Skipping permits can lead to fines, forced removal of work, or problems when selling your home. It’s tempting to take shortcuts, especially when you’re trying to save money or time. But failing to go through the proper channels can end up costing you more in the long run. Here are six common home projects that technically require permits but are often done under the radar.
1. Building a Deck
Many homeowners think they can build a deck as a weekend project without involving the city. But most municipalities require a permit if the deck is over a certain height, typically 30 inches above ground. The reason is safety—decks can collapse if not built to code. Permits ensure proper support, railings, and safe attachment to your house. Inspectors also check that the deck won’t affect utilities or property lines. Skipping this permit could result in a teardown or penalties later during a home inspection.
2. Finishing a Basement
Transforming your basement into a living area seems like a smart use of space, but it’s not as simple as laying down carpet and adding a couch. A finished basement typically involves plumbing, electrical, insulation, and egress windows, all of which require permits. Local codes are in place to protect against fire hazards, moisture problems, and poor air circulation. Without a permit, you risk unsafe conditions and reduced home value. Also, unpermitted spaces may not count toward official square footage. Getting it done right the first time saves headaches in the long run.
3. Installing a Water Heater
Replacing a water heater might seem like a plug-and-play job, especially for experienced DIYers. However, most local codes require a permit and inspection to ensure proper installation. Incorrect installation can lead to gas leaks, carbon monoxide poisoning, or water damage. Permits ensure your water heater meets safety standards for venting, temperature, and pressure. Many homeowners skip the permit to avoid fees or delays, but the risk isn’t worth it. If something goes wrong, your home insurance may not cover the damage.
4. Adding or Moving Electrical Outlets
It may seem harmless to add an outlet or move a light switch, especially in older homes with few plugs. But any change to your electrical system usually requires a permit and inspection. Improper wiring can lead to fires, shocks, or damage to appliances. Licensed electricians know how to handle voltage, grounding, and code compliance. Permits are your proof that the job was done correctly and safely. Skipping it can raise red flags when selling your house or during an insurance claim.
5. Replacing Windows
Swapping out old windows for new ones sounds simple, but in many cities, it’s a permitted job. Window replacement impacts your home’s insulation, structural integrity, and egress in case of fire. If the new windows don’t meet energy efficiency or emergency escape standards, it could be a safety issue. Building departments often require inspections to ensure correct installation and flashing. If done without permits, you could face rework or fines. Permits also protect your investment by ensuring the windows are properly fitted and sealed.
6. Putting Up a Fence
A backyard fence feels like a small project, but there’s more to it than digging holes and adding posts. Most cities require a permit, especially for fences over a certain height or those that border public sidewalks or roads. Permits help prevent property line disputes and ensure compliance with local ordinances. Fences can also impact visibility and safety, which is why cities regulate them. Skipping the permit could result in being forced to move or lower your fence. A quick check with your city’s zoning office can save major hassle.
Don’t Skip the Permit—It’s Worth It
Getting a permit might seem like an annoying extra step, but it protects you legally and financially. Permits ensure work is done safely and up to code, avoiding costly issues down the line. While some homeowners roll the dice and skip the paperwork, the risks are real—from fines to unsafe living conditions. If you’re unsure whether your project needs a permit, call your local building department. Taking the right steps now gives you peace of mind and protects your property’s value. When in doubt, permit it out.
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Drew Blankenship is a former Porsche technician who writes and develops content full-time. He lives in North Carolina, where he enjoys spending time with his wife and two children. While Drew no longer gets his hands dirty modifying Porsches, he still loves motorsport and avidly watches Formula 1.