ST. LAURENTCONSTRUCTION CO. INC.
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Home Addition

ADU Addition

Merrimack, NH

A new accessory dwelling unit built onto the side of the existing home. We handled the full scope in-house — foundation and slab, floor framing, wall and roof framing, sheathing, siding, windows, and exterior trim — delivering a fully self-contained addition finished to match the main house.

Project Photos

Foundation — poured concrete walls, sill plates set, and gravel prepped for the slab.
Foundation — poured concrete walls, sill plates set, and gravel prepped for the slab.
Floor framing — pressure-treated floor system tied into the existing home over the new foundation.
Floor framing — pressure-treated floor system tied into the existing home over the new foundation.
Exterior framing — walls sheathed and roof decked, windows roughed in and ready for weather barrier.
Exterior framing — walls sheathed and roof decked, windows roughed in and ready for weather barrier.
Interior framing — partition walls laid out for the living space, bathroom, and entry door.
Interior framing — partition walls laid out for the living space, bathroom, and entry door.
Finished ADU — gray vinyl siding, black shutters, new windows, and a covered entry matched to the main house.
Finished ADU — gray vinyl siding, black shutters, new windows, and a covered entry matched to the main house.

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Call (603) 889-2096Request an Estimate