Electrical
- Rewiring knob-and-tube: $8,000–15,000+.
- Replacing a Federal Pacific or Zinsco panel: ~$2,000–4,000.
- Remediating aluminum wiring connections: ~$300–1,500.
- Upgrading an undersized service to 200 amps: ~$2,000–4,000.
Plumbing
- Repiping poly-B: $4,000–15,000.
- Repiping galvanized supply: $4,000–12,000.
- Replacing a lead service line: $2,000–8,000 (your city may cost-share).
- Replacing a water heater: ~$1,200–2,500.
Roof & structure
- A re-roof: $6,000–13,000+.
- Sealing minor foundation cracks: $500–2,000; structural repair $5,000–40,000+.
- Regrading and drainage: $500–3,000.
Health & safety
- Radon mitigation: ~$2,500–3,500.
- Vermiculite / asbestos abatement: $10,000–30,000+.
- An oil tank removal is modest — but a leak cleanup can run $10,000–100,000+.
How to use these numbers
These are 2026 ballparks that vary widely by region, size, and access. Treat them as a starting point: when Casaroo flags an issue, get a licensed contractor's quote, then use it to negotiate the price or ask the seller to fix it before closing.