Specific issues that the building permit process may address include structural integrity of the framing work, zoning, sanitation, water, and sewer lines, fire protection, and electrical service. 

When Is a Building Permit Needed?

Not all home construction and renovation projects require a building permit. In most cases, simple repairs and replacements can be performed by professional contractors or homeowners without applying for a permit. However, any project that involves additions or major changes to your home’s structure or its mechanical systems usually require you to apply for an appropriate permit from the local building department. If you are hiring a contractor to perform the work, he usually will handle the permit process for you, factoring in the costs of the permit to his bid. If you are doing the work yourself, it is your responsibility to apply for the permit. Be aware that your building department may require that some types of work be done only by licensed professionals. Work on gas lines, for example, may be forbidden to homeowners in some communities.  The requirements for permits vary widely from region to region, though, and the only way you can tell for sure if a permit is required is to call your local building office and describe the work you want to do. Some regions may require permits for almost every type of work, even building a landscape fence. The decision to require a permit or not often depends on an assessment of the relative risk the work poses to current and future residents of the house. 

The Building Permit Process

If you are planning to do the work yourself, the process of obtaining a building permit usually goes something like this: 

Can I Bypass the Building Permit?

It is unfortunately fairly common for homeowners to complete home improvement projects without applying for a permit, paying the application fee, or having the work inspected and approved. And while it is possible that such projects can be completed with good quality and to never cause problems, it is not good practice to try and bypass the official permit process. Some possible hazards include: 

 If and when you try to sell your house, the buyers’ inspection may uncover remodeling or additions that were done without proper permits and which may not be completely up to code. This can prevent you from selling the house and may require that you undo the previous work and start again—this time with a permit.In the event of a fire, structural collapse, or major plumbing problem, if it is discovered the mishap is the result of work that was done without the benefit of permit or inspections, it’s possible your homeowner’s damage and liability policy may decline to cover the damage.