TL;DR (generated, confidence: high)

This page guides users on filling out three categories of forms required for ADU conversions: building permit application, trades applications, and project-specific forms, with detailed field completion instructions.

Key points:

Three form categories required: building permit application, trades applications (electrical/plumbing/mechanical permits), and other forms based on project needs (ADU conversions > Prepare > Fill out forms ↗)
Building permit application submitted as PDF on DevHub; select 'Addition' for new entryway/porch or 'Alteration' for removing/adding structural elements (ADU conversions > Prepare > Fill out forms ↗)
Contractor section requires CCB license number; if contractor not yet hired, write 'TBD' in business name field and update later (ADU conversions > Prepare > Fill out forms ↗)
Owner-performed work requires completion and submission of 'Owner Doing Work form' to acknowledge construction responsibilities (ADU conversions > Prepare > Fill out forms ↗)
For residential projects (1–2 family dwellings), owner must be listed as person's name, not LLC or corporation (ADU conversions > Prepare > Fill out forms ↗)
Valuation = total contractor labor + materials cost; if owner doing work, multiply material cost by 3 for labor estimate (ADU conversions > Prepare > Fill out forms ↗)

Entities: form: Building permit application · Owner Doing Work form | form_category: Trades applications | identifier: CCB license | system: DevHub | project_type: ADU conversions

ADU conversions > Prepare > Fill out forms

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Source: ADU conversions > Prepare > Fill out forms ↗ Last modified: Sun, 19 Apr 2026 20:06:17 GMT

This page provides guidance on how to fill out forms you might need for ADU conversions.

There are three categories of forms you'll need to fill out:

Building permit application - for alterations of existing space
Trades applications - for electrical, plumbing, and/or mechanical permits
Other forms - depending on your unique project

For details on how to send us these applications, see the section on how to submit your application ↗.

Building permit application

The building permit application ↗ is what you’ll use for building, altering, or demolishing. You'll submit this PDF on DevHub for each kind of permit you need.

Type of work

For each permit type you request, select the type of work you're doing on the PDF application.

Addition – If you're adding a new entryway or porch for an ADU.
Alteration – If you're removing and adding walls, floors, or ceilings to create an ADU.

Description of work

Make a statement about the work you’re planning to do. Here’s an example, but be sure to make it specific to your project.

Converting a basement to a 580 square foot ADU with a separate entrance. Adding a kitchen sink and electric stove circuit, adding a bathroom (toilet, sink, and shower).

Property owner or Tenant

This section is for the contact details of the property owner. The option to choose Tenant is only for commercial properties, not residential buildings.

Contractor

This section is for contact details of who is doing the work, either a contractor or the owner.

If you’re hiring a contractor, we’ll need their CCB license number. Be sure to get it from them before you apply.
If you’re planning to hire a contractor but haven’t yet, write TBD in the business name field. (You will need to update this later.)

Are you the owner doing the work?

If you’re doing the work yourself, be sure to sign and submit the Owner Doing Work form ↗. Take notice of your responsibilities listed on the form. You’ll include it when you submit your application.

For residential projects (one- and two-family dwellings only), the owner should be a person's name, not an LLC or corporation.

Applicant (or contact person)

This person will communicate with the City about permit updates and feedback. They will be responsible for sending us electronic plans. Pick someone, like a contractor, architect, or homeowner, who will respond quickly and communicate well with your building team.

Valuation

The valuation is the cost of the contractor’s labor and materials for your project. Consider getting quotes from multiple contractors.

To estimate the cost, calculate the square footage, choose your materials, and factor in labor (if you plan on doing the work yourself, use the total material cost and multiply by 3).