You need a NH-approved design if your septic system fails and you cannot replace it in the exact same location; or when you are expanding an existing structure (adding bedrooms, converting from seasonal to year round use, or changing use from residential to commercial); or when you are building a new house in an area that does not offer municipal sewer services.
When do I need a State of New Hampshire approved septic design?
Categories:
Precast Concrete (1),
Septic Systems (8)