Residential

Application forms and guidelines for onsite wastewater systems

These guides provide information to help you navigate the process of applying for different types of permits related to onsite wastewater system activities. After you complete an "Application for Onsite Sewage Treatment System" it is important that you send the application to the appropriate county or DEQ office. Find the right contact office by looking up your county on the Office and Agent List.
 
Which application do I need if . . . Application​
I want to build/place a new house on an undeveloped piece of property that has never been evaluated for septic system approval?​ Site Evaluation
​I want to replace a house with another house, but the new house will be in a different location on the property and I want to install a new system? Site Evaluation
I already have an approved site evaluation (test holes were evaluated) and now I want to install a septic system?​ Construction/Installation Permit
​I have a Construction/Installation permit, but I won't have the septic system installed before the permit expires? Permit Renewal/Reinstatement
​I have not installed my septic system yet, and my Construction Permit is expired. It's been less than one year since the permit expiration date? Permit Renewal/Reinstatement
​I have not installed my septic system yet, and it's been more than one year since the permit expired? Construction/Installation Permit
​I am buying a piece of property. The property owners that I am buying the property from have a valid Construction Permit that is not expired, but they have not yet installed the septic system. No changes to the permit will be needed? Permit Renewal/Reinstatement
(to transfer permit)
​I am buying a piece of property. The property owners that I am buying the property from have a current Construction Permit (that is not expired), but they have not yet installed the septic system. I need to make changes to the permit, or want to install the septic system in a different area? Site Evaluation and/or
Construction/Installation Permit
CONTACT DEQ!
​My septic tank and/or drainfield is failing? Repair Permit
​I want to add one or more bedrooms to my house? Authorization Notice
​I want to replace my existing house with another house, and connect it to an existing septic system? Authorization Notice
​I want to replace my existing house with another house. I know that my existing septic system is not going to be acceptable for connection to the new house, so I would like to install a new system. My new house will be placed in the same general area as the house that is going to be removed? Authorization Notice
(will be converted to a Repair Permit)
​My house burned down or was demolished, and I want to connect a new house to the existing septic system? Authorization Notice
​My property has an existing septic system and the certification was issued more than five years ago, but no buildings are connected to it now. Now I want to connect a new house or other structure to the system? Authorization Notice
​I want to add a commercial business to my residence that will increase sewage flows and/or waste strength into my existing septic system? Authorization Notice
​I am selling (or buying) a house, and the lender, buyer, or realtor is requiring an evaluation of the existing septic system? Existing System Evaluation
​I want to expand the size of my house or build a garage and I need to move my septic tank and/or drainfield to meet setback requirements. I am not adding bedrooms? Alteration Permit
​My septic system is not failing, but I want to expand the size of my drainfield or move my septic tank to a different spot? Alteration Permit
​I want to put a bathroom in my garage/shop for personal use. I want to install a septic tank just for the garage/shop, and use the existing drainfield connected to my house? Alteration Permit
​I am planning to partition my existing lot into 2 or more new parcels (not a subdivision)? Site Evaluation
​For projects other than those listed above and for commercial facilities, contact the DEQ Office/Agent that serves your county.
 

Sewage disposal service business license forms

 
 

Important information about completing these bond forms:

 
  1. The bond is to be issued on an exact copy of this form, not a facsimile of this form.
  2. The bond must have a surety seal. Sign and submit the original bond with your license application.
  3. The Attorney-In-Fact must sign on the required signature line. We do not require a signature for the Registered Agent for Oregon. However, we do appreciate having that information included on the bond when possible.
  4. A Power of Attorney sheet must be attached to each bond.
 

Product approval application forms and checklists

Tanks and distribution units

 
 

Alternative Treatment Technology products

Additional forms