City program

Pre-Approved ADU Plans in Fontana, California

Browse official and accepted pre-approved ADU plans for Fontana, California. Compare plan size, bedrooms, providers, approval status, official source links, permit requirements, and fees.

Program status: source-backed listings Last checked Jul 28, 2026

Program Overview

This Fontana page summarizes source-backed pre-approved ADU plan listings for Fontana, California, using official records tied to City of Fontana. The current export lists 3 accepted plans from 1 provider; provider names include Tang Structural Engineers, Inc.. The accepted listings are tied to the local Fontana program. Plan records cover 462 to 1,143 sq ft and 1 bedroom to 3 bedrooms where those fields were listed by the source.

Permit and fee context is kept separate from plan acceptance. The data export includes 1 permit requirement record and 0 fee records for Fontana. Permit requirement records include Site-specific permit. Fee records are Not listed in source for this location. When a source did not publish a value, the page keeps that field as Not listed in source instead of filling a blank.

Use these listings as a starting point for matching a plan to a property. Source links, checked dates, acceptance notes, and provider records are shown so you can verify whether a plan remains accepted locally, what site-specific review remains, and whether local fees, plan licensing, or provider terms apply. A listing in this directory does not guarantee permit approval for a specific parcel.

Summary

Location
Fontana, San Bernardino County, California, USA
Accepted plans
3 accepted plans
Providers
1 provider
Origin programs
1 program
Plan size range
462 to 1,143 sq ft
Permit sources
2 sources

How to use this page

  1. Pick a plan size and bedroom count.
  2. Check whether the plan originated locally or is accepted from another city/county program.
  3. Open the official source.
  4. Confirm current status with the local building department.
  5. Ask the provider what site-specific work, plan licensing, engineering, and utility review are still required.

Accepted Plans

3 plans

Permit Requirements

1 requirement

City standard plans

Site-specific permit

Official city source

A standard plan still requires site information and City permit approval.

Last checked
Jul 28, 2026
Notes
Not listed in source

Fees

0 fee records

No fee records listed

This location has no fee records in the current data export.

Official Sources

2 sources

Fontana ADU FAQ

6 answers

Does Fontana have accepted or pre-approved ADU plans in this directory?

Yes. The current Fontana, California page lists 3 accepted plans from 1 provider in the source-backed export.

What ADU plan sizes are listed for Fontana?

The listed Fontana plan records range from 462 to 1,143 sq ft. Use the individual plan cards to confirm bedrooms, bathrooms, plan documents, and provider details because some fields are not listed by every official source.

Where do the Fontana ADU plan records come from?

They are tied to 2 official sources in this page's source set, including City of Fontana. Each plan, fee, and permit note should still be checked against the linked official source before use.

Can San Bernardino County or nearby city ADU plans be used in Fontana?

The current Fontana records do not show accepted plans from a separate San Bernardino County or nearby city program. Treat outside pre-approved plans as unavailable in Fontana unless an official Fontana source says they are accepted.

Do pre-approved ADU plans guarantee permits in Fontana?

No. A source-backed accepted plan can reduce plan review work, but Fontana can still require site-specific review, zoning checks, fees, utility coordination, and current code compliance. This page lists 1 permit requirement to help flag items to verify with the local building department.

Are Fontana ADU permit fees and requirements listed?

This page includes 0 fee records and 1 permit requirement for Fontana. These are source-backed summaries, not a final permit quote or approval checklist.