Annandale boasts modern, high-capacity infrastructure maintained by Fairfax County and regional utility providers.
Electricity is primarily supplied by **Dominion Energy**, while natural gas is provided by **Washington Gas**. Water and sewer services are managed by **Fairfax Water**, known for providing some of the highest quality drinking water in the country. The community is well-connected digitally, with extensive broadband and fiber-optic internet options available through providers like **Verizon Fios** and **Cox Communications**. Cellular coverage is robust, with 5G networks fully deployed by all major national carriers across the CDP.