Roofing in Greenbriar at Whittingham, Monroe Township

Most roof repairs are estimated at $300 to $3,000, with the average near $900 nationally. Locally, one Monroe contractor publishes chimney flashing at about $350 to $750 and skylight reflashing at about $200 to $450. A cracked pipe boot on a single-story roof sits at the low end; flashing cut into a two-story chimney sits higher.

Not on age alone. Asphalt shingle is generally rated at 15 to 30 years, so twenty is when a roof deserves a proper look, not an automatic replacement. If the shingles still hold their granules, the flashings at the chimney and skylights are sound and the attic is dry, a repair may buy years.

For Monroe Township, one local contractor's published 2026 figures put an average 20-square roof at about $10,800 in architectural shingle, and most houses at about $13,000 to $21,000: $11,500 to $16,200 for 1,800 to 2,200 square feet, $14,000 to $19,000 for 2,200 to 2,800, and $18,000 to $25,000 or more past 3,000. Skylights and the chimney move it from there, which is why they are priced separately.

Not for a detached one- or two-family house. New Jersey's construction code treats re-roofing, including a complete replacement, as ordinary maintenance there (N.J.A.C. 5:23-2.7). Attached homes, townhomes and condominium buildings are a different case, and framing or decking work can need one. In Monroe the Construction Office is at 1 Municipal Plaza, and the quote says which case your house is; the rule was amended in 2025, so confirm with the office if in doubt.