Hawthorne Building Permits Guide for Homeowners

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

Hawthorne’s Building & Safety Department handles plan check and inspections for construction in the city, and permits are applied for through the city’s Citizen Self Service portal. This guide covers how the city describes plan check and inspections, how to schedule an inspection, how the online portal works and why permit history matters when you sell.

Details change, so confirm current rules, hours and fees with the department before you start work.

Hawthorne permits at a glance

Department	Building & Safety Department, City of Hawthorne
Building & Safety phone	(310) 349-2990
City Hall main line	(310) 349-2900
Counter hours	The city lists Monday to Thursday 7:00 a.m. to 6:00 p.m.; the Friday hours were cut off in the page we read, so call to confirm
Inspection window	9:00 a.m. to 5:00 p.m.; call 24 hours in advance to request an inspection
Online portal	Citizen Self Service (CSS): apply for permits, check status, call for inspections, review plan submittals
Plan check scope	Building, plumbing, electrical and mechanical code compliance

What Building & Safety does

The city says its plan check function reviews submitted plans for compliance with the applicable building, plumbing, electrical and mechanical codes, and that its inspection function covers activities on construction sites to make sure work matches approved plans and the codes.

In practice that means a homeowner planning an addition, a remodel that touches structure, plumbing, electrical or mechanical systems, or a new accessory building should contact the department before work starts and should expect plans and inspections to be part of the process.

Applying through Citizen Self Service

Hawthorne’s Virtual City Hall points residents to the Citizen Self Service portal, which the city describes as a way to apply for permits and plan requests, check the status of a permit or plan record, call for inspections and review plan submittals.

The city says the portal can be used from a computer or a phone. Before you list a house, the portal and the department are the first places to ask what permits exist for your address and whether any show as open.

Scheduling an inspection

According to the city, inspections are conducted between 9:00 a.m. and 5:00 p.m., and you should call the Building & Safety Department at (310) 349-2990 at least 24 hours ahead to request one. The city also has a request-for-inspection page where you can check inspection dates and times. A permit that never receives its final inspection stays open, which is the most common permit problem sellers run into.

Fees and what the city does not publish

The city pages we could read do not publish a fee table, plan-check turnaround, fine schedule or ADU size table, so this guide does not state any. Ask the department for current figures in writing.

On the requirements page the city notes that, where corrections ordered by an inspector require work, permit and plan check fees also apply and are based on the cost of the work. Get an itemized estimate before you commit to a contractor’s bid.

Permit history, open permits and selling

Hawthorne buyers, title companies and appraisers can ask about permit history on any home with an addition, converted garage, enclosed patio or remodel. An open permit means work was started but never given a final inspection; an expired permit means the window to finish lapsed.

Either one can come up during escrow. Under California Building Code rules as adopted statewide, work that needed a permit and did not get one may have to be opened up for inspection, so ask the department what it would require before you decide whether to legalize it.

Keep the permit number, plans and final inspection card with your closing documents, since a finaled permit is the clearest evidence that the work was inspected.

Ask Building & Safety at (310) 349-2990 three practical questions before listing: what permits are on file for the address, whether any are open, and what a final inspection would involve. That conversation costs nothing and tells you whether finishing a permit or selling as-is is the faster path.

Permits and selling a Hawthorne 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 Hawthorne 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 Hawthorne 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 Hawthorne

1. Check your address in the city’s Citizen Self Service portal or call Building & Safety.
2. Collect permits, final inspection records and contractor invoices.
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 Hawthorne page and the Los Angeles County hub.

Frequently asked questions

How do I apply for a building permit in Hawthorne?

The city directs residents to its Citizen Self Service portal to apply for permits and plan requests, check status, call for inspections and review plan submittals.

How do I schedule an inspection in Hawthorne?

The city says inspections run between 9:00 a.m. and 5:00 p.m. and asks you to call Building & Safety at (310) 349-2990 24 hours in advance.

What does Hawthorne plan check review?

The city says plan check reviews submitted plans for compliance with the applicable building, plumbing, electrical and mechanical codes.

What are Hawthorne’s permit fees?

The pages we read do not publish a full fee table. Ask Building & Safety for an itemized estimate for your project.

Can I look up permits on my Hawthorne property?

Residents can check the status of a permit or plan record through the Citizen Self Service portal, and the department can answer questions about records at (310) 349-2990.

Can I sell my Hawthorne house with unpermitted work?

Yes. You can disclose it and sell as-is, including to a cash buyer who takes the house in its current condition.

More guides

• We Buy Houses in Hawthorne
• We Buy Houses in Los Angeles County
• Los Angeles County Property Tax Guide
• Hawthorne Code Enforcement Guide
• Hawthorne Zoning and ADU Guide
• All California Guides

Sources

• City of Hawthorne: Building & Safety
• City of Hawthorne: Building & Safety Requirements
• City of Hawthorne: Inspections
• City of Hawthorne: Citizen Self Service
• City of Hawthorne: Virtual City Hall

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