17-3304 Mariner Avenue Tiyan Barrigada, Guam 96913
671.300.4751 671.300.4752
nic.rupley@epa.guam.gov

Can I convert my house to a duplex if it is served by a septic system?

Can I convert my house to a duplex if it is served by a septic system?

  • If the lot size is adequate to accommodate two dwelling units (for example, within the aquifer: 19,200 square feet x 2 = 38,400 square feet), conversion to a duplex may be permitted using a single septic system.  The septic system must be large enough to accommodate the full occupancy of the proposed duplex, which is very likely to require construction of a new septic tank and leaching field.
  • Conversion of a single family home to a duplex on a lot that is sized only for a single family dwelling will not be approved by GEPA pursuant to 22 GAR §12105(e) & (f).

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