Custom home planning resource · Los Angeles County and the South Bay
Planning a custom home in South Pasadena
In South Pasadena the first question is whether the property is a potential or designated historic resource. That answer decides which review body hears the project and whether a Certificate of Appropriateness is involved before demolition or new construction.
KB Remodeling takes new-home inquiries from owners planning here. Share the lot and the project; KB reviews scope, licensing and location for each inquiry before suggesting a next step.
Planning sequence
01
Find the review authority on the City's flowchart
The City publishes a Project Review Authority Flowchart because review authority depends on whether the property is historic or non-historic and residential or not.
Official resource: South Pasadena · Project Review Authority FlowchartCity-wide guidance · Passage checked
02
Ask whether the existing house is historic
The Building Division FAQ explains that most exterior changes require design approval and points owners to research whether a house is historic. A replacement project starts here.
Official resource: South Pasadena · Building FAQCity-wide guidance · Passage checked
03
Choose the matching application
Planning Resources lists Residential Design Review (including a Planning Commission Chair/Director variant), Certificate of Appropriateness for alteration or demolition, and Pre-Application Review. The City states planning applications can be submitted through its OpenGov portal.
Official resource: South Pasadena · Planning ResourcesCity-wide guidance · Passage checked
04
Use Pre-Application Review for early feedback
Planning Resources includes a Pre-Application Review form, and the City invites owners to email AskPlanning to meet a planner. Bring the parcel's zoning and what you know about the existing house's history.
Official resource: South Pasadena · Planning ResourcesCity-wide guidance · Passage checked
Each step links to the official page it comes from. Requirements differ by parcel; confirm with the agency.
Who reviews a new home here
South Pasadena is an incorporated city in Los Angeles County.
City of South Pasadena — Community Development (Planning Division and Building Division).
Local planning journey
Which planning question to resolve first here, and why it shapes the brief. Each answer comes from the cited City page or stays a question for staff.
Question 1
Is the existing house a potential or designated historic resource?
The City's Project Review Authority Flowchart (2025 version, read October 13, 2026) says the reviewing body depends on whether the property is historic or not and whether it is residential.
source: South Pasadena · Project Review Authority FlowchartQuestion 2
Which review body hears this project?
Find the path on the flowchart before choosing an application.
source: South Pasadena · Project Review Authority FlowchartQuestion 3
Would Pre-Application Review save a redesign?
Early feedback is most useful before the historic and design questions are locked in.
source: South Pasadena · Planning Resources
Finding the current official checklist
Use the Planning Resources page and the current flowchart; the Building Division FAQ covers the permit stage after Planning.
Owner evidence to gather first
- Construction date and any historic survey listing
- Photos of all elevations of the existing house
- Your path on the review flowchart
Two South Pasadena starting points
| If the property is… | Ask first |
|---|---|
| A potential or designated historic resource | Whether a Certificate of Appropriateness is needed before demolition or new work |
| Not historic | Which design review path the flowchart assigns to a new house |
Local issues and the budget lines they touch
| Local issue | Budget line it affects |
|---|---|
| Historic resource question | Historic assessment and possible redesign |
| Review body hearing | Hearing preparation time |
No dollar amounts or local premiums are implied.
Hypothetical: a buyer of a modest 1910s bungalow near Mission Street plans to replace it. Before closing, they ask the City whether the house is a potential historic resource, since that may change the project from replacement to rehabilitation.
What shapes the budget here
- Historic-resource research or assessment for an existing house
- Design review drawings, models or renderings for a public hearing
- Redesign rounds if a review body asks for changes
These items affect cost; none is a price. See how to build a realistic budget: Custom home budget guide
Parcel questions to answer first
- Is the existing house a potential or designated historic resource?
- Which review authority does the flowchart assign to this project?
- Would demolition require a Certificate of Appropriateness?
Gather before a first conversation
- Address or APN and recent site photos
- Survey, title report and prior permits if available
- Architect drawings, or a written list of rooms and priorities
- Target timing and how you plan to finance construction
Related guides: Buying land to build · Lot utility due diligence · Choosing a custom-home builder · 2025 Energy Code for new homes
Official sources
Each source shows what it covers and whether its passage was checked in our review.
- South Pasadena · Planning Resources
Design review, Certificate of Appropriateness and pre-application forms.
City-wide guidance · Passage checked - South Pasadena · Building FAQ
When design approval applies; historic status; permits.
City-wide guidance · Passage checked - South Pasadena · Project Review Authority Flowchart
Review authority by historic status and project type.
City-wide guidance · Passage checked
3 of 3 official source passages checked (latest October 13, 2026).
Page content last updated:
Nearby places worth comparing
- Custom home planning in Pasadena — Neighboring city, different ordinances
- Custom home planning in San Marino — Neighboring city with design review