Washington mobile home — quick answer
In Washington, a mobile home bill of sale is required and notarization of the title transfer is situational. The state form used for titled vehicles is 420065. Mobile/manufactured homes in Washington are titled like a vehicle in many states, but some states use a separate manufactured-housing agency or convert them to real property — confirm with the Washington DOL.
Is a mobile home bill of sale required in Washington?
Required. Washington uses Form 420065 (Vehicle/Vessel Bill of Sale); the seller files a Report of Sale within 5 days.
Seller signs the title; the buyer titles and registers, and the seller files a Report of Sale. For mobile/manufactured homes, Washington may use a separate titling process — confirm with the Washington DOL before you sign.
Does a Washington mobile home bill of sale need to be notarized?
Situational (situational). The transfer signature must be notarized if pre-signed; instead, you can sign in front of a vehicle-licensing agent (no notary needed in person).
What to include on a Washington mobile home bill of sale
- Buyer and seller full legal names and addresses
- Year, make, model, and type (single/double-wide)
- Serial number / VIN and HUD label number
- Size (width × length) and current location
- Price, date, and signatures of both parties
How to transfer a mobile home in Washington
- 1Complete the bill of sale and title assignment.
Record the buyer, seller, price, and date. Both parties sign and date.
- 2Hand over the signed title.
Seller signs the title; the buyer titles and registers, and the seller files a Report of Sale.
- 3File a notice of sale / release of liability.
The seller files Report of Sale — file within 5 days to remove liability.
- 4Register with the Washington DOL.
The buyer titles and registers the mobile home, bringing Vehicle/Vessel Bill of Sale. Confirm current fees on the official page.
Official sources
Requirements change and can vary by county. Confirm with the Washington DOL before you sign. Not legal advice.
Washington Mobile Home Bill of Sale — FAQ
Is a mobile home bill of sale required in Washington?
A bill of sale is required in Washington. Washington uses Form 420065 (Vehicle/Vessel Bill of Sale); the seller files a Report of Sale within 5 days.
Does a Washington mobile home bill of sale need to be notarized?
Sometimes. The transfer signature must be notarized if pre-signed; instead, you can sign in front of a vehicle-licensing agent (no notary needed in person).
Do I need a bill of sale to sell a mobile home?
In most cases, yes. A mobile home bill of sale documents the price and terms and supports the title transfer. If the home is titled as personal property you will also sign over the title; if it has been converted to real property, the sale is handled more like real estate.
Is a mobile home titled like a car?
Often, yes — when classified as personal property, a manufactured home is titled through the state motor-vehicle agency, similar to a vehicle. Once permanently affixed to land you own, it may be converted to real property and recorded with the county instead.
Is a bill of sale proof of ownership?
Generally no. For titled property like a car or boat, the title is what proves ownership. A bill of sale proves that a sale happened and records the price, date, and terms — it supports the title transfer but does not replace it. For untitled property (furniture, equipment, electronics), the signed bill of sale is usually the main proof of ownership.