ADU Design Pasadena
Develop the floor plan, exterior direction, material selections, functionality, and site fit before committing to engineering and construction.
Los Angeles County · California
Pasadena ADU design & construction
Pasadena’s standard-plan availability changed in 2026. An updated 374-square-foot studio is available for general use, while older plans are restricted to qualifying Eaton Fire red-tagged properties.
Local planning guide · Reviewed October 2, 2026
What matters for an ADU in Pasadena
Permitting authority: City of Pasadena — ADU Standard Plans
Official local guidanceLocal rules and design checks
| Topic | Local guidance |
|---|---|
| Code-cycle eligibility | Use the updated August 2026 Prototype A for general applications; verify eligibility before selecting an older plan. |
| Openings near boundaries | The program guidance distinguishes four-foot side/rear setbacks from five-foot setbacks for walls with doors or windows. |
| Plan changes | Modifying a standard design removes its pre-reviewed status and requires the normal review path. |
Selected local requirements, not a complete zoning determination. Confirm the current rules for your address with the responsible agency.
Fees and budget checks
Pasadena invoices plan review and address assignment separately. Modified designs receive standard plan-review fees; ask whether additional sprinkler, solar, grading or encroachment permits are required.
Pasadena standard-plan fees and addressingHow to start the permit process
Confirm the design with the Permit Center, prepare the site plan and Hold Harmless Agreement, then submit through Citizen Self-Service and complete a separate Address Application.
Dated municipal plan example
Updated Prototype A: 374-square-foot studio
Pasadena identifies this August 2026 drawing as compliant with the 2025 California Building Code. Older catalog entries have different eligibility.
View the original sourcePasadena ADU questions
- Can everyone use Pasadena’s older free plans?
- No. The City limits the older plans to qualifying residential properties red-tagged due to the Eaton Fire.
- Is an address included in plan review?
- A separate Address Application and invoice are part of Pasadena’s process.
Sources for this guide
Local sources reviewed October 2, 2026. Historical examples retain their stated dates. Contact ADU California Inc. to confirm project availability; this guide does not establish an office location or property approval.
Design-led ADU planning
ADU design, architecture & engineering coordination in Pasadena
Start with ADU design in Pasadena, then coordinate architect and engineer scope, permitting, budgeting, and the custom builder or contractor work needed to move the project toward construction.
ADU Architect Pasadena
Architectural planning can address layout, massing, code constraints, site relationships, and permit drawings where an appropriately licensed professional is required.
ADU Engineer Pasadena
Engineering coordination can cover structural, foundation, utility, civil, energy, and other disciplines required by the property and permitting authority.
Custom ADU Builder Pasadena
Compare custom scope, site constraints, model options, finish level, construction sequence, and written pricing before selecting a build approach.
ADU Contractor Pasadena
Coordinate construction scope, subcontractors, schedule, inspections, site logistics, and closeout around a clearly defined permitted set.
ADU Design Build Pasadena
A coordinated design-build workflow keeps property review, design, engineering, permitting, budgeting, procurement, and construction aligned.
A useful first review
Separate what is available from what still needs verification.
01
Confirm the property
Start with a complete address and review the available parcel, building, and map context.
02
Identify the unknowns
Keep missing setbacks, easements, utilities, access, hazards, and local requirements visible.
03
Choose the next review
Use the preliminary result to prepare a focused conversation with the required professionals and agencies.
Explore project types
Compare the scope before choosing a solution.
These pages explain the questions each project type introduces. They do not assert that a particular scope is permitted or suitable for your address.
Compare planning footprints
See common ADU sizes before choosing a design.
These model pages are planning references only. They are not a statement that a particular size is allowed or buildable at a Pasadena address.
California directory
Explore more city guides.
The next useful action
Put your address at the center of the conversation.
The online review is preliminary and is not a permit decision, survey, engineering opinion, construction document, final price, or guaranteed schedule.