Duarte Building Permits Guide for Homeowners

Last updated November 13, 2026. Reviewed by the Cash Home Buyers CA team.

Duarte’s Building & Safety Division works out of the Community Development Department at 1600 Huntington Drive, reviews plans at the Community Development counter, and does not currently take plan submissions through an online portal or by email. This guide walks Duarte homeowners through what needs a permit, how plan check works, how long permits last, how to schedule an inspection, and how permit history affects a sale.

The city updates forms, hours and fees, so confirm current details with the division before you start work.

Duarte permits at a glance

Department	Building & Safety Division, Community Development Department, City of Duarte
Address	1600 Huntington Drive, Duarte, CA
Phone	(626) 386-6817 on the building page; the page and FAQ also list (626) 357-7931 with extensions 235, 236 and 536
Inspector counter hours	Monday through Thursday, 8 to 10 a.m.
Inspection hours	Monday through Thursday, 10 a.m. to 2 p.m.
Plan submission	In person at the Community Development counter; the city says it has no online portal for plan submissions and does not accept plans by email
First plan check	In most cases one or two weeks, per the city
Permit validity	180 days, extended while work is active and regular inspections confirm progress

What the Building & Safety Division does

The city’s building page says that before any building-related construction or installation occurs, plans must be prepared and submitted to the city.

Some plans can be approved over the counter, while others need a detailed plan check, where staff review the drawings for compliance with the Building Code and similar requirements. Plan check fees are usually based on the valuation of the project.

The page also describes a Duarte Permit Center and says automated plan review for residential solar goes through SolarAPP+, which charges its own processing fee.

The city also runs a Construction and Demolition Deposit Program. It collects a deposit on covered projects, and the page links a program handbook, an eligibility checklist and a checklist. Ask the division at submittal whether your project is covered.

What needs a permit in Duarte

The Community Development FAQ says a permit is required to construct, enlarge, alter, remodel, repair, convert, move or demolish any building or structure or part of one. Its examples include garages, patios, sheds, pools, retaining walls, tenant improvements, roof replacement or repair, sign installation, stucco repair, window installation, removal or replacement, drywall replacement, fire damage repairs, solar photovoltaic systems, adding or removing interior walls and enclosing patios.

Separate permits are listed for electrical, mechanical, plumbing, sewer, drainage, grading and landscaping work, and a right-of-way permit is required for work in the city right-of-way.

The FAQ also says a shed of 120 square feet or less and no taller than 8 feet can be built without a building permit, though zoning rules still apply.

Because window replacement, enclosed patios and interior wall changes are on the permit list, many older Duarte homes have remodels that were never permitted.

Step by step: a Duarte permit

1. Confirm what you need

Call the Community Development Department at (626) 357-7931 and ask whether your job needs plan check or can be approved over the counter, and whether Planning or Public Works has to sign off first. The FAQ lists extension 230 or 235 for Planning, 234 for Public Works and 236 for Building.

2. Prepare and submit plans

Plans are submitted at the Community Development counter. The city says it does not accept plan submissions by email or through an online portal at this time, so plan a trip to City Hall with a complete set.

3. Plan check

Staff review for Building Code compliance. The city says a first plan check usually takes one or two weeks. Corrections mean a resubmittal, so a complete first package saves time.

4. Pay fees and pull the permit

The city says fees are proportional to the valuation of the work described on the application. The amount that applies to your job is the one the division quotes at submittal.

5. Build and request inspections

Inspections by the building inspector are required for all permits, often several during the job, and a final inspection when the work is complete.

Inspections and permit expiration

The city says that in almost every case it provides an inspection on the next working day. Call the Building & Safety Division at (626) 357-7931, extension 236, to schedule one. The FAQ lists extension 536 for inspection scheduling, so if one line does not connect, try the other or the main number.

When you leave a voice mail, include the permit number, the address, the inspection type, the requested day, and your contact name and phone number. The inspector counter is staffed Monday through Thursday from 8 to 10 a.m., and inspections run Monday through Thursday from 10 a.m. to 2 p.m.

Permits are valid for 180 days. The city says that time is extended while work is active and regular inspections confirm progress. The FAQ adds that a permit expires if work is not commenced within 180 days of issuance or is suspended for 180 days. A lapsed permit is a common problem on a house that is about to be listed, so ask the division where yours stands.

Permits and selling a Duarte house

Buyers and lenders ask about permit history, and California sellers generally disclose known unpermitted work on the Transfer Disclosure Statement. Our statewide guide to selling as-is with unpermitted work explains what disclosure involves, and the seller closing costs guide shows what else to budget. If tenants live in the home, read the tenant-occupied home sale guide.

When a Duarte home has an open permit, an expired one, or work done without a permit, you generally have three options: finish and finalize the permit before listing, disclose the work and negotiate on the open market, or sell as-is to a cash buyer who takes the house in its current condition. Use this checklist:

• Ask the city’s building division for the permit record on your address.
• List every addition, garage conversion, enclosed patio or outbuilding, and note which have permits.
• Gather final inspection records, plans and contractor invoices.
• Ask what plans, fees and inspections it would take to permit each unpermitted item.
• Compare that cost and time with a no-repairs cash sale. New construction can also be reassessed for property tax, which our Prop 13 guide explains.

Questions to ask the Duarte building division before you start

• Does my project need Planning or Engineering approval in addition to a building permit?
• Is there an exemption that applies, and what conditions come with it?
• What plan-check deposit and fees apply, and how long will review take right now?
• What inspections will be required, and in what order?
• Can an existing unpermitted structure be legalized, and what would that involve?

Common permit mistakes homeowners make

The most common problems are starting work before the permit is issued, letting a permit expire, skipping a required inspection, and assuming a contractor pulled a permit when none exists. Each one can surface years later when a buyer’s agent, appraiser or lender asks for records.

A lapsed or never-finalized permit is easier to resolve while you still own the home and can answer questions from the city. If you are not planning to stay, decide early whether finishing the permit or selling the house as it stands makes more sense.

If you hired a contractor, ask for a copy of the permit and the final inspection record and keep them with your closing documents. A finaled permit is the clearest evidence that the work was inspected. Our capital gains guide also explains how improvement costs may matter when you sell.

How to sell a house in Duarte

1. Ask the Building & Safety Division for the permit record on your address.
2. Collect permits, final inspection records and any city notices.
3. Request a no-obligation cash offer for the house as it stands.
4. Choose your closing date.
5. Close with no repairs, permit cleanup or showings required.

See also our Duarte page, the Duarte as-is sale page, the Duarte cash offer process and the Los Angeles County hub.

Frequently asked questions

Where is the Duarte Building & Safety Division?

At 1600 Huntington Drive in Duarte, within the Community Development Department. The inspector counter is staffed Monday through Thursday, 8 to 10 a.m.

Can I submit building plans online in Duarte?

The city says it does not currently have an online portal for plan submissions and does not accept plans by email. Plans are submitted at the Community Development counter.

How long does Duarte plan check take?

The city says a first plan check usually takes one or two weeks, with some plans approved over the counter.

How long is a Duarte building permit valid?

180 days, per the city. The time is extended while work is active and regular inspections show progress, and a permit expires if work is suspended for 180 days.

How do I schedule an inspection in Duarte?

Call (626) 357-7931, extension 236, and leave the permit number, address, inspection type, requested day and your contact information. The city says it usually inspects on the next working day.

Can I sell my Duarte house with unpermitted work?

Yes. You can disclose it and sell as-is, including to a cash buyer. Our statewide guide explains the disclosure rules.

More guides

• We Buy Houses in Duarte
• We Buy Houses in Los Angeles County
• Los Angeles County Property Tax Guide
• Duarte Code Enforcement Guide
• Duarte Zoning and ADU Guide
• Sell a Duarte House As-Is
• Duarte Cash Offer Process
• Azusa Building Permits Guide
• All California Guides

Sources

• City of Duarte: Building & Safety
• City of Duarte: Community Development FAQs

This guide is general information from public sources, not legal advice. Confirm current rules, fees and hours with the city.