Adding square footage permanently changes your home's value. A properly permitted, engineer-stamped addition built by licensed general contractors passes every inspection and holds its value through every market cycle.
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Most contractor problems are preventable. These checks take under an hour and catch the most common hiring mistakes.
Ask for their MO contractor license number — then verify it yourself at the state licensing website before signing anything.
Request a certificate of insurance. Call the carrier directly to confirm general liability and workers' comp are active.
Get at least three written bids. Any quote more than 30% below average is a red flag, not a deal.
Ask specifically about permit requirements for home addition. A contractor who says "no permit needed" for structural work is a liability.
Read recent Google and BBB reviews for complaint patterns — not just star averages. One-star reviews reveal how disputes get resolved.
AboveBoardPros handles checks 1 and 2 for you.
Every contractor on this page has had their license cross-checked against the MO state database and insurance verified. You negotiate the contract — but you start from a verified shortlist.
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Bump-outs cost $5,000–$30,000 and expand a room 2–15 feet without new foundation work. Full additions cost $30,000–$100,000+ and require foundation, framing, and roof extension. Here's how to know which your project actually needs.
Midwest home additions cost $150–$300 per square foot and return 50–65% at resale. Here's which additions pencil out, which don't, and how to decide for your home.
All home additions require permits for structural, electrical, plumbing, and HVAC work. Permit costs run 0.5–2% of project cost. Here's what gets inspected, how long approval takes, and what happens if you skip it.
Not every problem needs a contractor today — but some absolutely do. Use our home repair urgency checker to find out if your issue needs immediate action, a 2-week appointment, or just monitoring.
Converting an attached garage to living space costs $15,000–$50,000 depending on scope. ROI is 65–80% — better than most additions. But there are real tradeoffs in cold climates and HOA neighborhoods.
Before you commit to a kitchen overhaul or deck addition, see exactly what each project returns at resale. Our ROI calculator uses 2025 Cost vs. Value data to show you the numbers in seconds.
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Get Free Quotes →Typical Cost Range
$40,000–$150,000
Chesterfield market estimate
In Chesterfield, home addition typically ranges from $40,000 to $150,000. Getting three written bids from licensed contractors is the most reliable way to calibrate your specific project.
Timeline depends on project scope. Ask for a written schedule before work begins, and specifically ask about material lead times and permit inspection windows — these cause most delays.
Home additions always require a building permit. The permit process covers structural plans, foundation, framing, electrical, and final inspections at multiple stages. No licensed contractor will begin an addition without pulling permits — and unpermitted additions must be disclosed in any home sale.
Yes. Chesterfield enforces active licensure and insurance. Ask any contractor for their license number and verify it at the MO state licensing website before signing a contract.
Four-point check: active license confirmed against the MO licensing authority, corporate standing reviewed, insurance validated, business reputation analyzed. We reject roughly 40% of applicants and monitor every listed contractor continuously. A license that lapses means removal.
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