Mercer Island, WA · King County
Affidavit in Support of Single-Family Building Permit
This affidavit records an owner’s commitments for a single-family building permit, including keeping the property a single-family unit and notifying future buyers about accessory dwelling unit limits.
- licensed online notary
- ~15 min average
- Notarized PDF emailed
What you’ll need
- Government-issued photo ID
- Webcam-enabled device (laptop or phone)
- This form, ready to upload as a PDF
What this form is
This affidavit states the property is intended to remain a single-family unit and that no accessory dwelling unit or duplex is present at the listed Mercer Island address. Owners make these commitments for a single-family building permit, including notifying future purchasers about accessory dwelling unit limits and accepting possible removal if city requirements are violated. The signed affidavit must be recorded at the owner’s expense and a copy supplied to the city.
Who needs it
Property owners applying for a single-family building permit in Mercer Island must complete the affidavit and arrange to record it with King County.
Why it needs a notary
The form contains an acknowledgment block; each property owner signing the affidavit must personally appear before a notary and acknowledge signing it voluntarily.
How to get this notarized
- 1
Download the Affidavit
Get the City of Mercer Island’s Affidavit in Support of Single-Family Building Permit.
- 2
Fill In the Property Details
Enter the owner, property address, legal description, parcel ID, and permit details requested on the form.
- 3
Book an Online Notary
Arrange an appointment with a commissioned online notary and have identification ready.
- 4
Sign on Video
Each property owner signs and acknowledges the affidavit during the online notary session.
- 5
Record and Send a Copy
Record the signed affidavit with the King County Auditor at your expense, then provide a copy to the city.
Preview the form
The blank PDF straight from Mercer Island. Look it over, then upload your filled copy to start the notary session.
You’ll need ID and a webcam.
A licensed online notary will join you on video, verify your government-issued ID, witness your signature, and apply their seal. You’ll receive the notarized PDF by email when the session ends.
Frequently asked questions
- How do I submit this affidavit to Mercer Island?
- Sign the affidavit before a notary, record it with the King County Auditor at your expense, and provide a copy to the City of Mercer Island as the form requires.
- Do I need to record the signed affidavit?
- Yes. The form says the owner agrees to have the document recorded with King County at the owner’s expense and to supply a copy to the city.
- Can I sign this affidavit with an online notary?
- Washington permits remote online notarization by a commissioned online notary. Ask the city whether it will accept a remotely notarized copy for this filing; confirm with the city or town if unsure.
- Who signs the affidavit?
- The property owner or owners sign the affidavit. Each signer must acknowledge signing before the notary, using the acknowledgment block printed on the form.