The short answer
A room addition goes foundation, floor framing, walls, roof, weather wrap, interior drywall, siding and finish work. On our most recent addition, foundation forms went up in late February and the finished room was ready in early June, about four months start to finish.
Foundation (late February)
Concrete forms were set and the foundation walls were poured behind the house, where an old covered porch had been.
Floor framing (mid March)
Floor joists were framed on the foundation and covered with subfloor sheathing.
Walls (late March)
Exterior walls were framed and sheathed, with openings for the windows.
Roof (April)
Roof trusses were set and the roof was decked, then the shell was wrapped in housewrap against the weather.
Drywall (May)
Inside, drywall was hung, taped and mudded.
Siding and finish (early June)
Dark blue siding went on outside, and the interior was painted and trimmed with windows on three walls.
Permits and planning
Additions in Michigan need permits and inspections. Plan time for design and approvals before the first shovel goes in the ground.
When to call a pro
Thinking about adding on? Quality Finish builds room additions across Southwest Michigan with one local crew from foundation to finish. Call or text for a free estimate.
Room additions and garages in Southwest MichiganCommon questions
How long does a room addition take?+
Our recent addition took about four months from foundation forms to a finished room. Size, weather, permits and material lead times all change that.
Do I need a permit for a room addition in Michigan?+
Yes. Additions require building permits and inspections from your local building department.
Can a room addition match my house?+
Yes. Siding, trim and rooflines can be matched to the existing home.