Who completes Form 312?

The property owner completes and signs the form. It asks for the project address, assessor’s parcel number, proposed ADU type, and owner contact information.

Do I need a notary for the ADU Property Owner Declaration?

No. The owner signs and dates the declaration without a notary; the form states that the owner affirms under penalty of perjury that the ADU will not be sold separately.

How do I submit the ADU Property Owner Declaration?

Submit it with the building permit application to construct an ADU. The form does not give a submission channel, so check the city website for current contact details.

San Jose, CA · Santa Clara County

No notary required

ADU Property Owner Declaration (Form 312)

Property owners submit this declaration with a building permit application to construct an accessory dwelling unit in San Jose.

What this form is

San Jose requires the property owner to submit this declaration with a building permit application to construct an accessory dwelling unit (ADU). The form collects the project address, assessor’s parcel number, proposed ADU type, and owner contact information. The owner signs an affirmation that they own the property and do not intend to sell the ADU separately from the primary residence.

Who needs it

A property owner applying for a building permit to construct an ADU in San Jose must complete and submit this declaration.

How to submit it

Submit it to the city department named on the form; check the city website for current contact details.

About notarization

This declaration is signed and dated without a notary; the owner affirms under penalty of perjury that the ADU will not be sold separately.

How to submit this form

1
Download The Form
Download the ADU Property Owner Declaration, Form 312.
2
Complete The Form
Enter the project address, assessor’s parcel number, ADU type, and property owner contact information.
3
Sign And Date
The property owner signs, prints their name, and dates the declaration.
4
Submit With The Application
Include the signed declaration with the building permit application to construct an ADU.

Frequently asked questions

What is the ADU Property Owner Declaration?: It is a San Jose form that a property owner submits with a building permit application to construct an accessory dwelling unit. It records project and owner information and includes the owner's declaration.
Who completes Form 312?: The property owner completes and signs the form. It asks for the project address, assessor’s parcel number, proposed ADU type, and owner contact information.
Do I need a notary for the ADU Property Owner Declaration?: No. The owner signs and dates the declaration without a notary; the form states that the owner affirms under penalty of perjury that the ADU will not be sold separately.
How do I submit the ADU Property Owner Declaration?: Submit it with the building permit application to construct an ADU. The form does not give a submission channel, so check the city website for current contact details.

Need something notarized?

This ADU Property Owner Declaration (Form 312) doesn’t need a notary — but if you have another San Jose form that does, a commissioned online notary can help.