Solar Energy in New Castle County, DE (2026)

2 rules for unincorporated New Castle County, Delaware.

Verified from official government sources

Note: These county rules apply to unincorporated areas of New Castle County. If you live within an incorporated city, that city's own rules apply — see the city list below.

Panel Permits

New Castle County requires building and electrical permits for solar panel installations. Rooftop residential systems are typically permitted in 2-4 weeks. 3-foot fire setbacks from roof ridges and edges required per IRC.

solar-energy/panel-permits

Some Restrictions

Full ordinance details →Official source ↗

HOA Restrictions

Delaware's Solar Rights Act (25 Del. C. §318) limits HOA restrictions on solar panels. HOAs may impose reasonable aesthetic rules but cannot effectively prohibit installation or impose conditions that raise cost over 5% or reduce output over 10%.

solar-energy/hoa-restrictions

Few Restrictions

Full ordinance details →Official source ↗

All New Castle County ordinances

See every category we cover for New Castle County — parking, noise, fences, fires, animals, pools, and more.

New Castle County Ordinance Hub →