Right-size a septic system before you dig. Enter the number of bedrooms to get the recommended tank capacity and an estimate of the leach field area.
Local codes usually size the tank by bedroom count — 3 BR = 1,000 gal.
Sizes for a 1-2 day wastewater retention inside the tank.
Leach field area depends on how fast your soil drains.
Always check your local health department requirements.
Plan the utilities too.