Planning a home project in Delaware? This page brings together every cost guide we publish for the state — installed prices, yearly savings and payback for 2026 — plus the verified Delaware rebate programs that can cut the bill.
In Delaware, the swing seasons and real winters and summers shapes the energy year, and installation costs here sit close to the national average — both are built into every range below.
Published Delaware Guides
- Heat Pump Cost in Delaware (2026 Guide): Prices, Savings & Rebates
- Attic Insulation Cost in Delaware (2026 Guide): Prices, Savings & Rebates
Home Project Costs in Delaware at a Glance
| Project | Typical cost in Delaware | Yearly savings | Simple payback | Guide |
|---|---|---|---|---|
| Central AC Replacement | $5,250–$10,500 | $335 | 23.5 years | Coming soon |
| Heat Pump | $6,900–$16,500 | $805 | 14.5 years | Read the guide |
| Attic Insulation | $1,500–$3,450 | $455 | 5.4 years | Read the guide |
| Roof Replacement | $7,600–$18,200 | $60 | — | Coming soon |
| Solar Panels | $15,800–$23,450 | $1,790 | 11.0 years | Coming soon |
| Tankless Water Heater | $2,850–$5,250 | $120 | 33.8 years | Coming soon |
| Replacement Windows | $6,250–$13,000 | $325 | 29.6 years | Coming soon |
Verified Rebates & Incentives in Delaware
- Energize Delaware Heat Pump Rebate — Up to $1,600 for qualifying heat pumps. Delaware homeowners through Energize Delaware / utility programs; equipment standards apply. Covers: Heat Pump. Source: HomeUpgradeCheck state rebate index
Amounts and rules change — confirm eligibility with the program before you sign a contract, and note that several programs require action before installation.
Figures compiled from public sources, updated October 2026. Local quotes vary — get 2–3 estimates.