For a basic plastic D-box, expect $25-$60 per unit, with installed costs typically $150-$400 depending on site access and labor rates. Heavier-duty or multi-zone configurations can push total to $600-$1,000 for the box and labor, while complex installations or off-grid sites. Distribution box cost encompasses various factors that influence the overall investment in electrical distribution systems. A distribution box serves as a crucial component in electrical installations, housing circuit breakers, fuses, and other protective devices that ensure safe power distribution. When you start looking for a distribution box, you'll quickly realize the price range is wider than a highway. The “how much” depends entirely on. While distribution box prices depend heavily on capacity and features, we've tracked emerging patterns. Expect these price points when budgeting for 2025 installations: Quality power cables make or break your electrical system. Used to seal septic riser to concrete steptic tank. Cost estimates below use.