Custom home planning resource · Los Angeles County and the South Bay
Planning a custom home in Duarte
Duarte’s official guidance separates the main building permit from associated systems and site work. That makes a replacement-house proposal a coordination task: identify the existing structure, demolition and new construction, then ask which separate reviews and permit records cover the rest. The City’s ADU program is a different project path, not a pre-approved main-house design.
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
Check zoning before completing the building set
Building & Safety directs owners to Planning for zoning compliance before building-related construction and plan submission. Bring the parcel record and a written replacement/new-house scope so Planning and Building review the same proposal.
Official resource: Duarte · Building & SafetyCity-wide guidance · Passage checked · supporting excerpt read through search results from the official page; confirm current instructions with the agency
02
Map the separate systems and site permits
The FAQ says a building permit does not cover associated plumbing, sewer, electrical, mechanical, drainage, grading or landscaping work and describes separate permits. Ask staff which records and other departments apply to the actual scope; this is not a fee or complete permit determination.
Official resource: Duarte · Community Development FAQsCity-wide guidance · Passage checked · supporting excerpt read through search results from the official page; confirm current instructions with the agency
03
Confirm delivery and the correction process
The Building & Safety page describes detailed plan check for some plans and counter submission at Community Development. Confirm the current delivery route with the City before relying on that instruction; do not assume the ADU email route is available for a main-house construction set.
Official resource: Duarte · Building & SafetyCity-wide guidance · Passage checked · supporting excerpt read through search results from the official page; confirm current instructions with the agency
04
Keep standard ADU plans out of the main-house decision
The City’s pre-approved program is for Accessory Dwelling Units and says standard-plan modifications are not permitted for its expedited-review benefits. A custom main house is not one of those standard plans. Use a separate main-house scope and request its review requirements.
Official resource: Duarte · Pre-approved ADU programWritten for ADUs, not new houses · Passage checked · supporting excerpt read through search results from the official page; confirm current instructions with the agency
Each step links to the official page it comes from. Requirements differ by parcel; confirm with the agency.
Who reviews a new home here
Duarte is an incorporated city in Los Angeles County.
City of Duarte — Community Development: Planning Division and Building & Safety 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
Has Planning confirmed zoning compliance before plans?
Building & Safety (read October 13, 2026) tells owners to contact Planning on zoning before preparing plans; plan check services are provided under contract with Charles Abbott Associates.
source: Duarte · Building & SafetyQuestion 2
Over the counter or detailed plan check?
Some plans can be approved over the counter; others need detailed plan check. A new house should expect to ask.
source: Duarte · Building & SafetyQuestion 3
What does demolition add?
Duarte runs a Construction & Demolition Deposit Program tied to CalGreen recycling; plan the deposit and diversion records.
source: Duarte · Building & Safety
Finding the current official checklist
Use the Building & Safety page and Community Development FAQs, then ask the counter for the current new-dwelling list.
Owner evidence to gather first
- Planning zoning confirmation
- Existing-structure record for demolition
- C&D recycling plan
Duarte replacement-house sequence
| Step | What to confirm |
|---|---|
| Planning | Zoning compliance before drawings |
| Plan check | Over the counter vs detailed review |
| Demolition | C&D deposit and recycling records |
| Permit | Valid 180 days, extended with active inspected work |
Source: Duarte · Building & Safety
Local issues and the budget lines they touch
| Local issue | Budget line it affects |
|---|---|
| C&D deposit | Refundable deposit and diversion reporting |
| Detailed plan check | Correction rounds |
No dollar amounts or local premiums are implied.
Cost drivers to confirm before pricing
| Issue | Fact that confirms it | Who answers | What a proposal should list |
|---|---|---|---|
| Demolition recycling | City C&D program requirements | Contractor and hauler | Diversion tracking and deposit handling |
| Permit validity | Permit terms on issuance | Contractor | Schedule that keeps inspections regular |
Hypothetical: owners replacing an older house budget the demolition but forget the C&D deposit and recycling records; adding them to the proposal avoids a late surprise.
What shapes the budget here
- Demolition/new-house scope and associated systems listed separately
- Site, drainage and landscape responsibilities explicit in proposals
- Corrections and separate permit administration distinguished from quoted construction
These items affect cost; none is a price. See how to build a realistic budget: Custom home budget guide
Parcel questions to answer first
- Which permit records cover the house, demolition, systems and site work?
- Which Planning checks and other departmental reviews apply before the building set is final?
- What is the current main-house submission route, separate from ADU instructions?
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.
- Duarte · Building & Safety
Planning coordination and plan check. Confirm current delivery instructions; no review-time promise or contract-provider claim.
City-wide guidance · Passage checked · supporting excerpt read through search results from the official page; confirm current instructions with the agency - Duarte · Community Development FAQs
Building versus associated-system/site permits; scope-specific coordination.
City-wide guidance · Passage checked · supporting excerpt read through search results from the official page; confirm current instructions with the agency - Duarte · Pre-approved ADU program
ADU-only program, not a pre-approved main-house design.
Written for ADUs, not new houses · Passage checked · supporting excerpt read through search results from the official page; confirm current instructions with the agency
3 of 3 official source passages checked (latest October 12, 2026).
Page content last updated:
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