Most Alton homeowners don't know their contractor is unlicensed until something goes wrong. Every pro on AboveBoardPros is cross-checked against the IL license database before you ever see their name.
Our home addition contractors in Alton are license-screened, insured, and continuously monitored — not just checked once at signup.
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A four-point check before any contractor appears on this page. Not a signup checklist — an ongoing process.
Matched against the official state licensing authority. Active status confirmed — not just past certification.
General liability and workers' comp on file. An uninsured contractor makes your homeowner's policy your fallback.
Corporate standing, years in operation, and reputation signals reviewed. Contractors who don't meet our standards are not listed.
Licenses expire. Policies lapse. Our checks run automatically. A contractor whose license lapses is removed immediately.
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1 contractors in database
5 ZIPs covered
Median income: $50,000-$59,999
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Typically $40,000 to $150,000 in Alton, depending on scope and materials. Get competing bids to calibrate the actual range for your project.
Yes. Alton enforces active licensure and insurance requirements. AboveBoardPros verifies against IL government databases before any contractor appears here.
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.
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.
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.
Kitchen remodels take 8–14 weeks. Bathroom remodels take 3–6 weeks. Roof replacements take 1–3 days. Here are the honest timelines for every major home improvement project — and what causes delays.
Home additions cost $150–$310 per square foot for finished living space, with second-story additions running 25–40% more. Use our estimator to get a realistic budget range before you meet with a general contractor.
Missouri has no state general contractor license requirement — which means anyone can call themselves a contractor. Here's the 7-step checklist to verify before you hand over a deposit.
Got a contractor quote in hand but something feels off? Run it through our red flag checker — 10 warning signs sourced from FTC and state contractor board fraud reports — and get an instant verdict.
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