Attic conversion in MetroWest, MA

We handle four levels of attic conversion: a storage or utility finish-out, a bonus room or home office, a code-compliant bedroom with egress window and proper stair, and a full primary suite with bathroom rough-in and dormer addition. Each scope is spelled out in a written estimate before work begins, so you know exactly what is included and what is not.

A conversion covers structural assessment, permitting assistance, framing and joist reinforcement, insulation, drywall, electrical and lighting rough-in and finish, flooring, stair construction or upgrade, and window or dormer installation through final inspection. Full bathroom plumbing and fixtures, HVAC system replacement, and exterior roofing work beyond a dormer tie-in are add-ons quoted separately.

Timeline depends on scope. A simple storage or bonus-room finish with existing headroom runs 2 to 4 weeks. A standard bedroom conversion with reinforcement, electrical, and egress window takes 6 to 10 weeks. A full primary suite with dormer, new stair, and bathroom plumbing runs 10 to 16 or more weeks, including design and permitting lead time.

Insulation options include fiberglass batt, blown-in cellulose, or closed-cell spray foam sized to R-38 through R-49 for Massachusetts climate zones. Framing uses dimensional 2x8 or 2x10 joists or LVL engineered lumber where reinforcement is needed. Subfloor is 3/4-inch tongue-and-groove plywood or OSB, and drywall is 1/2-inch or 5/8-inch Type X throughout.

Habitable space under the IRC requires at least 7 feet of ceiling height over 50 percent of the floor area, a minimum room size of 70 square feet, and joists engineered or sistered to carry 30 to 40 pounds per square foot. Bedrooms also need an egress window with a net clear opening of at least 20 inches wide, 24 inches high, and 5.7 square feet total.

We start with a site evaluation of joists, rafters, and headroom, then prepare permit drawings and complete code review. Once the permit is issued and engineering signed off, we complete framing and structural reinforcement, rough-in electrical, HVAC, and plumbing where applicable, then insulation, drywall, flooring, trim, and finish work. Final inspection and certificate of occupancy sign-off closes the project.

We stand behind our workmanship with a 3-year warranty. If an issue is caused by our work, we'll return promptly to inspect it and make it right at no additional cost during the warranty period. A dedicated project manager stays assigned to your job throughout, so there is a single named contact if anything needs attention after completion.

Attic conversion work extends across MetroWest and Greater Boston, including Newton, Needham, Natick, Hopkinton, Holliston, Medfield, Westwood, Weston, Brookline, Concord, Acton, Marlborough, Northborough, Grafton, Medway, Millis, Dover, Sherborn, Boxborough, Somerville, Hingham, and Boston. Reach out to confirm scheduling for your town and Get a Quote on your project.