Liberty Lake, WA · Spokane County
Certification of Impervious Surface
Property owners, contractors, or project representatives complete this form to certify a parcel’s impervious surface area for Liberty Lake stormwater assessment calculations.
What this form is
Liberty Lake requires this form before project close-out for annual Stormwater Assessment calculations. Complete one form per parcel, identify the project and parcel, report the total impervious surface area, and provide contact details for the person verifying the information. The signer certifies that the reported amount is accurate and that they have authority to sign for the applicant.
Who needs it
A property owner, contractor, or project representative verifying impervious surface information for a parcel must complete and sign the form.
How to submit it
Complete one form per parcel and email it to [email protected] before project close-out.
About notarization
This form is signed without a notary; the applicant provides a physical or electronic signature, printed name, and date.
How to submit this form
- 1
Download The Form
Download the Certification of Impervious Surface form.
- 2
Complete One Form Per Parcel
Fill in the project, parcel, contact, and total impervious surface information.
- 3
Sign And Date
The applicant signs physically or electronically, prints their name, and dates the form.
- 4
Email The Form
Email one completed form per parcel to [email protected] before project close-out.
Frequently asked questions
- Do I need a notary for the Certification of Impervious Surface?
- No. The form calls for an applicant’s physical or electronic signature, printed name, and date; it does not require notarization.
- How do I submit the Certification of Impervious Surface?
- Complete one form per parcel and email it to [email protected] before project close-out for the annual Stormwater Assessment calculations.
- What information does the form request?
- It requests project and parcel details, the total impervious surface area, contact information for people verifying the information, and the applicant’s signature, printed name, and date.
Need something notarized?
This Certification of Impervious Surface doesn’t need a notary — but if you have another Liberty Lake form that does, a commissioned online notary can help.