Additions

The addition’s size, one story or two, the foundation you plan, and your town for permits.

• Attach your Sheet so people see your sizes and the math.
• Your town is enough. Never your address; check photos for house numbers and plates.
• Is it safe? A safety question here goes to pros verified in general contracting or carpentry, unless you pick another trade. Only they can call it safe or unsafe.

16′ × 12′ addition: 4.75 cu yd of concrete, 63 studs, 28 sheets of sheathing, 3 squares of roofing and 14 sheets of drywall.

What people get wrong:

• Skipping the zoning check. Setbacks, lot coverage and height decide whether the addition can be built at all.
• Missing the floor height. Carry the house’s floor height out before the foundation goes in: the new floor should meet it (or the step is planned), not surprise you at the doorway.
• Backfilling unbraced walls. Backfill before the floor is framed or the walls are braced and they can crack or move.

The worked example, every line's math and the code notes · Your own sizes in the app

• Framing and walls: Building and moving interior walls, studs, plates and headers
• Load-bearing walls and beams: Taking out walls, beams, posts and what holds the house up
• Drywall: Hanging, taping and finishing walls and ceilings
• Drywall patches and cracks: Holes, cracks, nail pops and water stains
• Plaster walls: Old plaster and lath: cracks, repairs and skim coats
• Trim and molding: Baseboard, casing, crown and chair rail
• Interior doors: Hanging, adjusting and replacing doors inside the house
• Closets and shelving: Closet systems, shelves and built-ins
• TV mounting: Mounting TVs on drywall, studs, brick and over fireplaces
• Media walls and feature walls: TV walls with niches, LED strips and shelves
• Insulation: Walls, attics and floors: batts, foam and blown-in
• Soundproofing: Quieter walls, floors and ceilings
• Every group

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