Roofing in Duxbury, MA: Costs, Permits and What to Expect

Duxbury has one of the best collections of antique homes on the South Shore, plus Powder Point and the bay houses that take salt and northeast wind. A roof replacement here is usually about two questions: what the historic rules allow, and how to build for the exposure.

The permit comes from the Duxbury Building Department at Town Hall, 878 Tremont Street, and a re-roof is filed online through the town's OpenGov portal as a "Residential Expedited Permit", the same application used for siding and replacement windows and doors. A dumpster of 6 yards or more needs its own permit and has to sit at least 5 feet from the house. The fee schedule linked on the town website, effective January 1, 2019, charges $12 per $1,000 of estimated construction cost with a $45 minimum. Confirm the current figure with the department when you file.

Duxbury has 14 local historic districts covering 43 protected properties. For a house in one of them, a like-for-like replacement gets a certificate of non-applicability, which has to be issued before the building permit. The district guidelines state that asphalt and fiberglass shingles are acceptable and that roof color is not reviewed, and the town's own fact sheet says roofing materials are not restricted to wood. If your house is not one of those 43 properties, the historic commission is not involved in a re-roof.

Massachusetts treats a roof replacement as permitted work. The residential code (780 CMR, 10th edition) lists what is exempt from a permit, and re-roofing is not on that list. The contractor needs a Construction Supervisor License that covers roofing and, on an owner-occupied home, a Home Improvement Contractor registration, and the HIC number goes on the permit application.

The code also sets the floor for how the roof is built. Ice barrier underlayment is required everywhere in the state, running from the eave to at least 24 inches inside the exterior wall. A new roof cannot go over two existing layers, or over one that is wet or deteriorated, and drip edge is required at eaves and rakes. Shingles have to carry a wind rating matched to the town's design wind speed.

Duxbury's design wind speed in the state code is 125 mph, so shingles need to be labeled ASTM D7158 Class G or H, or D3161 Class A, D or F. On Powder Point, Snug Harbor and the bay streets we go further than the minimum: stainless fasteners, coastal flashing metal and sealed edges. On the antique houses most leaks start where an ell, a barn or an addition meets the main roof, and those joints get rebuilt when the roof comes off.

What a roof costs comes down to a handful of things you can see in a written estimate: the size of the roof in squares, the pitch, how many layers come off, how much of the deck is soft once it is open, the flashing at chimneys, walls and skylights, ventilation corrections, and the shingle system itself. The permit is a small line next to those. Any estimate worth signing lists them separately, including the price per sheet for deck replacement, so the number does not move once the old roof is off.

Under the Massachusetts home improvement law (MGL c.142A), a contract over $1,000 has to be in writing, with the contractor's registration number on the first page, start and finish dates, the materials, the total price and the payment schedule. The deposit cannot be more than one third of the price, or the cost of special-order materials, and a contract signed at your home comes with three days to cancel.

Who pulls the permit matters. If the registered contractor pulls it, you are covered by the state Guaranty Fund, which pays up to $25,000 on an unpaid judgment against a registered contractor. If the homeowner pulls the permit, that protection is gone. We pull the permit on every roof we do.