Replacing windows in your Ann Arbor home sounds straightforward, but permit requirements in Washtenaw County can catch homeowners off guard. Whether you are upgrading drafty single-pane windows in an older craftsman near Burns Park or installing new egress windows in a finished basement near the University of Michigan area, knowing when a permit is required can save you from costly fines and complications when you sell your home.
In Washtenaw County, permit requirements depend largely on the scope of the work. The City of Ann Arbor follows the Michigan Residential Code, which generally requires a building permit when window installation involves structural changes. This includes enlarging or reducing an existing window opening, adding a brand new window opening, or installing egress windows in basement living spaces. A permit is typically NOT required for a simple same-size, same-location window replacement, often called a like-for-like swap, where no framing alterations are made. However, rules can vary between Ann Arbor city limits and surrounding townships such as Ann Arbor Township, Pittsfield Township, or Scio Township, so always verify with the correct jurisdiction before starting work.
For properties within Ann Arbor city limits, permits are issued through the City of Ann Arbor Building and Rental Registration Services office. Homeowners and licensed contractors can submit applications online through the city portal or in person at 301 E Huron Street. You will typically need to provide a site plan or diagram showing window dimensions, location, and any framing modifications. Permit fees in Ann Arbor are generally based on the total project value and start around 65 dollars for smaller residential projects, though fees are subject to change and should be confirmed directly with the city. Inspections are required after rough framing and again after the installation is complete when structural work is involved. Processing times can range from a few business days to two weeks depending on current workload at the building department.
Unpermitted window work in Ann Arbor can create significant problems. Home inspectors routinely flag unpermitted structural modifications during real estate transactions, which can delay or kill a sale. Washtenaw County can also require you to remove and redo work at your own expense if it was completed without proper approval. Insurance claims related to window failures may also be denied if unpermitted work is discovered. Beyond legal and financial risks, permitted work gives you assurance that the installation meets Michigan energy code requirements, which directly affects your heating and cooling costs year-round.
If you are planning a window replacement or installation project in Ann Arbor or anywhere in Washtenaw County, working with a local licensed contractor who understands the permit process is the smartest move you can make. A qualified Ann Arbor window installation expert can handle the permitting paperwork, schedule inspections, and ensure your project is fully code-compliant from start to finish. Contact a local pro today to get a free estimate and keep your project on the right side of county regulations.