Roofing in Lawrence Township (Mercer County), New Jersey

Not required

Required

The 2024 International Residential Code, New Jersey edition, adopted by the State, with the Rehabilitation Subcode for work on existing buildings. New Jersey has one construction code, the Uniform Construction Code (N.J.A.C. 5:23), which every municipality enforces; municipalities do not adopt building codes of their own (N.J.S.A. 52:27D-123.1 and 52:27D-139). N.J.A.C. 5:23-3.21(a)1 adopts the International Code Council's "2024 International Residential Code known as the IRC/2024 as the one- and two-family dwelling subcode in New Jersey subject to the modifications stated at (c) below," and 3.21(b) applies it to "detached one- and two-family dwellings and townhouses not more than three stories above grade plane in height." The section was rewritten by R.2026 d.086, "effective August 17, 2026," in the Department of Community Affairs' print of the rules "adopted and published through the New Jersey Register, Vol. 58 No. 16," and the Department's Current Construction Codes page lists the "International Residential Code/2024, NJ ed" with an adoption date of Aug 17, 2026. Other buildings fall under the building subcode, the International Building Code/2024, NJ edition (N.J.A.C. 5:23-3.14). Roof work on an existing building is held to the Rehabilitation Subcode: "Existing structures, when repaired, renovated, altered or reconstructed, shall conform to the requirements of N.J.A.C. 5:23-6, Rehabilitation Subcode" (N.J.A.C. 5:23-2.4(a)). A six-month grace period follows the adoption. N.J.A.C. 5:23-1.6(a): "For a period of six months following the operative date of a subcode revision, applicants may submit a complete permit application, including all prior approvals, to be reviewed under the code in force immediately preceding the subcode revision." The rule history gives R.2026 d.086 no date other than its effective date, so on that reading the window runs from August 17, 2026 until about February 17, 2027: a complete application filed inside it may be reviewed under either the prior edition or the 2024 edition, at the applicant's choice, and one filed after it closes is reviewed under the 2024 edition. Everything above is New Jersey state law, the same in every municipality. Locally, the Construction Code Enforcement Division page says it reviews permit applications and plans "in accordance with the State Uniform Construction Code" and refers readers to the Department of Community Affairs for current codes; it names no code edition.

No permit is needed under state law to reroof a detached one- or two-family house, and the Lawrence Township Construction Code Enforcement Division's own page lists "The repair or replacement of existing roof covering on detached one or two-family dwellings" as ordinary maintenance; a townhouse, other attached dwelling or any other building needs a permit. The page also says "For any emergency work to be done in an unsafe area, roof leak, heater repair, etc., applicant must file for a permit within 72 hours." Where a roof permit is required, the Township's construction permit fee schedule (effective May 5, 2009) has no separate roofing line; renovations, alterations and repairs are charged on estimated cost at $28.00 per $1,000.00, then $22.00 per $1,000.00 from $50,001 to $100,000 and $18.00 per $1,000.00 above $100,000, and "Lawrence Township shall make the final decision regarding estimated cost." The minimum fee for a basic construction permit is $46.00. The Division is at the municipal complex, 2207 Lawrence Road (Lawrenceville Road for GPS users), phone 609-844-7056, open Monday to Friday, 8:30 a.m. to 4:30 p.m. Its online FastTrackGov portal is for permit inquiries: the page says "you may search through our permit database by business name, owner name, location, and/or contractor."