What Columbus Residents Should Know Before A Home Addition
A home addition runs a wide range depending on the square footage you add, the foundation and roof work it takes to tie the new space into the old, and how far the heating, wiring and plumbing have to reach. The fastest way to pin down a real number is comparing quotes from local pros — here's what to know first.
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What Drives Home Addition Cost
The biggest price levers are the size of the new footprint, what has to go under it, and how the new roof meets the existing one. A ground-level room on a new foundation prices very differently from a second-story build over a house that has to be structurally checked first, and a garage conversion sits somewhere else again because the slab and walls already exist. Extending heating, electrical and plumbing into the new space is its own line item. No contractor can price any of that from a description, which is why comparing written quotes beats any cost-per-square-foot rule of thumb.
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Answer a few questions about your project and we share your request with local contractors through our partner network so they can contact you with quotes. You choose who to talk to and who to hire — there is no obligation.
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What To Ask A Contractor Before You Hire
Ask what the price includes: drawings and engineering, permit fees and who files them, excavation and foundation, framing and the roof tie-in, windows and doors, and the mechanical work. Ask which items are allowances rather than fixed prices, because allowances are where two quotes quietly stop being comparable. Ask for the warranty on materials and labor, and ask how the crew will keep the rest of the house livable while the wall is open.
What To Expect, Start To Finish
Most additions run from drawings and permitting through excavation and foundation, framing and roofing, then rough mechanicals and inspection, insulation and drywall, and finally finishes and a walkthrough. Permitting alone can take weeks before anyone breaks ground, and a full addition usually runs months rather than days; a garage conversion or an attic finish is shorter because the shell is already there. Your contractor should hand you a written scope and schedule before work starts.
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