Why additions matter
Septic systems are sized for expected flow, usually based on bedrooms. Adding bedrooms can push a system past what it was designed for — and a permit for the addition may require the septic to be brought up to size.
Typical upgrades
- Larger or additional tank
- Expanded drain field
- Advanced treatment where space or groundwater limits the field
- Risers and filters added at the same time
Order of operations
- Find out the size of the current system
- Evaluate the site for expansion
- Design and permit
- Install before or alongside the addition
Common questions
How do I know my system's size?
Permit records, the tank itself, or an evaluation.
Do I need a septic upgrade for a remodel?
Only if it changes capacity needs, like adding bedrooms.
Can my lot fit a bigger field?
The site evaluation answers that.