Roof replacement in Princeton, NJ

Princeton became a single municipality in 2013, when the former Borough and Township of Princeton consolidated. Its housing reflects three centuries: colonial and Federal houses near Nassau Street, large early-20th-century houses in stone, stucco and brick, and postwar neighborhoods farther out.

Slate country

Slate is more common in Princeton than anywhere else in Mercer County. The university's own Nassau Hall had its slate roof replaced in a restoration that began in 2018. On private houses, slate roofs often come with copper valleys, copper gutters and tall chimneys, all of which affect how a replacement is done.

When slate is worn out, the choice is between new natural slate, synthetic slate and architectural shingles. See slate roof replacement for the trade-offs.

Historic preservation

Princeton's Historic Preservation Commission oversees changes to properties in the municipality's historic districts and to individually designated landmarks. In 2026 the commission considered applications involving slate roofs on Nassau Street buildings, including whether synthetic slate was an acceptable replacement. That debate shows what owners in historic districts should expect: material choices get a careful look.

For a house in a district:

• Confirm the designation before choosing a roofing material.
• Expect like-for-like replacement to be simplest.
• Bring product samples and photos if you want to change material.
• Get approval before scheduling the roofer.

The rest of Princeton

Postwar neighborhoods hold Colonials, ranches and split-levels. Those are usually asphalt shingle replacements, where New Jersey's rules for detached houses generally mean no construction permit is needed, though local zoning and historic rules still apply where relevant.