Buying a home with unpermitted renovations in San Bernardino County can lead to forced demolitions, denied homeowners insurance claims, and unexpected structural failures after closing. Discovering a beautiful converted garage, a newly built patio cover, or a finished basement can feel like a major selling point, but if the local building department has no record of the work, you could inherit a costly legal and financial liability.
Because San Bernardino County is the largest county by land area in the contiguous United States, finding its records means knowing exactly who holds them for a specific address. A mistake here can lead to looking in the wrong database, missing critical red flags, and closing on a home with hidden hazards.
Why Unpermitted Work Is a High-Stakes Risk in San Bernardino County
San Bernardino County features some of the most diverse geography and extreme weather conditions in California. From the heavy snow loads of the San Bernardino Mountains (including Lake Arrowhead and Big Bear) to the intense desert heat and wind of the Mojave Desert, buildings in this region must withstand unique environmental pressures.
When property owners bypass the permitting process, they bypass critical safety inspections designed to ensure structures can survive these local elements. Unpermitted work commonly found in the county includes:
- Unpermitted Mountain Decks: Decks built in mountain communities that may not be engineered to support heavy winter snow loads, risking structural collapse.
- Permit-Free HVAC Installations: Air conditioning and heating systems installed without Title 24 energy efficiency verifications, which are strictly enforced in California.
- Garage Conversions: Unpermitted living spaces or accessory dwelling units (ADUs) that lack proper fire separation, emergency escape windows, or safe electrical wiring.
- Electrical and Plumbing Additions: Substandard wiring or plumbing lines that fail to meet California Building Standards Codes, raising the risk of fire or water damage.
Some insurance providers have documented declining coverage or denying claims for property damage that originates from unpermitted structural, electrical, or plumbing work. If a local code enforcement officer discovers unpermitted construction, they can issue a notice of violation, assess code enforcement penalties, and require you to either bring the work up to current building codes or completely demolish it at your own expense.
Step 1: Determine the Correct Jurisdiction (City vs. County)
Before searching for building permits, you must determine whether the property is located in an unincorporated area of San Bernardino County or within the boundaries of one of the county's 24 incorporated cities.
If the property is located within an incorporated city (such as Fontana, Rancho Cucamonga, Ontario, Victorville, or the City of San Bernardino), that specific municipality's building department administers and stores the permit history. The county government will not have these records.
If the property is located in an unincorporated community (such as Joshua Tree, Crestline, Oak Hills, Landers, or Mentone), the San Bernardino County Land Use Services Department is the governing authority.
How to Verify the Jurisdiction
To find out which agency holds the records for a property, you can use the following methods:
| Method | What to Look For |
|---|---|
| Property Tax Bill | Look at the "Tax Rate Area" or the specific taxing agencies listed. If a city name is listed as the primary taxing municipality, the property is incorporated. |
| County Assessor Portal | Search the parcel on the San Bernardino County Assessor’s online property lookup. The parcel details will explicitly state whether the property is located in an incorporated city or unincorporated county land. |
| Physical Address Clues | Do not rely solely on the mailing address. A home may have a "Joshua Tree" or "Victorville" mailing address but actually sit on unincorporated land outside municipal borders. |
Step 2: How to Search Permits in Unincorporated San Bernardino County
If your target property lies within unincorporated territory, the permit history is managed by the San Bernardino County Land Use Services Department. They host a digital public access system that allows buyers to research permit histories online.
Using the EZ Online Permitting Portal
The county utilizes an online database known as the EZ Online Permitting system, which is powered by the Accela Citizen Access platform.
- Access the Portal: Navigate to the San Bernardino County Land Use Services website and locate the link for the EZ Online Permitting portal.
- Search Without registering: You do not need to create an account or log in to run a basic historical permit search.
- Select the Search Category: Click on the "Building" tab or the "Land Use" tab to begin your query.
- Enter the Property Information: You can search by street address or Assessor’s Parcel Number (APN).
- Expert Tip: In vast desert or mountain areas, rural addresses are sometimes formatted inconsistently in older government systems. Searching by the exact 13-digit APN (formatted as XXXX-XXX-XX-X-XXX) is highly recommended, as it eliminates address-matching errors.
- Review the Records: The portal will display a list of permits associated with the parcel. Click on individual permit numbers to view the scope of work, dates of application, and final inspection statuses.
Submitting a Public Records Act (PRA) Request
If the property is older (typically built before the mid-1990s), some historical permit documents may not be digitized or viewable on the public portal. In this case, you must submit a formal public records request under the California Public Records Act.
You can submit this request online through the county's primary portal or by contacting the Land Use Services Department directly. Be specific in your request, asking for "all historical building permits, certificates of occupancy, and code enforcement files" for the target address or APN.
Step 3: How to Search Permits in Incorporated Cities
If the property is located within city limits, you must bypass the county database and use the city's specific building department resources. Below is an overview of how permit searches work in some of the county's largest municipalities:
- Rancho Cucamonga: The city offers an online database called the "Online Permit Center" where users can search by address or APN to view building permit histories, active code enforcement cases, and planning approvals.
- Ontario: Ontario utilizes an online public portal for permit and development tracking. Users can look up active and historical records, though very old microfilmed records may require contacting the Building and Safety Department directly.
- Fontana: Fontana provides a public records search portal where historical permit documents can be retrieved. For older properties, you may need to file a formal records request through the City Clerk's office.
- Victorville: The City of Victorville hosts an online permit search tool. Because the High Desert area has seen rapid expansion, verifying permits for additions, patio covers, and detached garages is highly recommended here.
If a specific city does not have an active, searchable public database, you will need to call or visit their Building and Safety Department in person, or submit a records request through the City Clerk.
Step 4: Comparing Assessor Records Against Permit Histories
A critical step in your due diligence is comparing the County Assessor's property characteristics with the actual building permit history and the physical reality of the home.
The County Assessor’s primary job is to value property for taxation purposes. To do this, they maintain records of square footage, bedroom counts, and bathroom counts. However, a match between the physical house and the assessor's database does not guarantee the work was legally permitted.
Sometimes, an assessor's office updates its records based on aerial photography, MLS listings, or physical appraisals to adjust property taxes, even if the construction was done without a permit.
To verify legality, cross-reference the two records:
- Obtain the assessor's record showing the official square footage and room count.
- Pull the full permit history from the building department.
- Confirm that there is an approved, finaled building permit for every square foot of living space, bathroom addition, or detached structure currently sitting on the property.
Step 5: Deciphering Permit Statuses (Issued, Expired, Finaled)
When reviewing a permit history report, the status of each permit is just as important as its existence. Look closely at the status field for each entry:
- Finaled / Completed: This is the ideal status. It means a municipal building inspector physically visited the site, reviewed the work, and signed off that the construction complied with the local building codes in effect at that time.
- Issued / Active: The permit was approved and the project was allowed to begin, but the final inspection was never completed or signed off.
- Expired / Voided: The permit was opened, but the property owner failed to complete the work or call for inspections within the required timeframe (typically 180 days in California without an extension). An expired permit is considered an open, unresolved issue by the building department.
- Withdrawn / Denied: The permit application was started but never completed or approved.
An open, expired, or unfinaled permit is a cloud on the property's history. It means the work was never legally completed in the eyes of the jurisdiction. If you buy a home with an open permit, you may be required to hire a licensed contractor to complete the work, bring it up to current building codes (which may have changed since the permit was first issued), and pay for a new round of inspections.
As-Built Drawings and Plan Sets: What the County Actually Holds
"As-built" means two different things in a permit search, and buyers routinely run them together. An as-built permit is retroactive approval for work already done, which is the sense used further down this page. As-built drawings are the plan set showing what was actually constructed, and that is a separate record governed by separate rules.
For most houses, no plan set is on file at all. California Health and Safety Code section 19850 requires a building department to keep an official copy of the plans for the life of any building it permitted, but it exempts dwellings no more than two storeys plus basement, along with garages and other structures appurtenant to them. A typical single-family house in San Bernardino County sits inside that exemption, so neither the county nor a city was ever obliged to retain drawings for it. Condominiums are the exception the statute carves out: plans for a common interest development are not exempt, so for a condo there should be a set on file.
Where plans do exist, you can generally look but not copy. Section 19851 makes the official copy a public record open for inspection on the building department's own premises. Duplicating it needs written permission from two parties: the licensed professional who signed the original drawings, or their successor, and the current owner of the building, or the association's board where the building is part of a common interest development. The department requests that permission on your behalf rather than leaving you to chase it, you sign an affidavit agreeing the copy will be used only for the maintenance, operation and use of the building, and the professional cannot withhold permission unreasonably. A court order or a state agency's request are the only other routes.
What that means while you are still the buyer. You are not the owner yet, so half the permission the statute requires is the seller's to give, not yours. If you need the drawings, to price a planned addition or to confirm a structural change was actually engineered, ask during the contingency period and have the seller make the request. Waiting until after closing means starting the same process over as the new owner.
Which office to ask follows the same jurisdiction rule as the rest of this page: Land Use Services for unincorporated areas, the city building department inside city limits. Older documentation is often still on microfilm, which means a counter visit rather than a download.
Special Case: Manufactured Homes in Desert Communities
In the desert expanses of San Bernardino County, manufactured homes are highly common. If you are researching permits for a manufactured home, the process involves a unique jurisdictional split.
While local foundations and utilities are permitted through the county or city building departments, the construction standards for the manufactured structure itself are governed by federal regulations [HUD].
When checking permits for these properties, you must verify:
- The local building department issued a permit for the foundation system (often an "HCD" permit in California, signifying compliance with the state's Department of Housing and Community Development).
- Any additions, such as attached carports, sunrooms, or decks, have local building permits. Unpermitted additions on manufactured homes are particularly risky because they can compromise the structural integrity of the manufactured home's original chassis.
What to Do If You Find Unpermitted Work Before Closing
If your research reveals unpermitted additions, converted spaces, or unfinaled permits, you have several avenues to protect yourself before completing the transaction.
- Consult a Professional Inspector: Hire a licensed home inspector or a structural engineer to perform a thorough evaluation of the unpermitted area. They can assess whether the construction appears safe, stable, and compliant with basic building practices, even if it lacks official paperwork.
- Request the Seller Resolve the Issue: You can ask the seller to obtain a retroactive permit (often called an "as-built" permit) before the close of escrow. This process involves hiring a professional to draw plans, paying penalty fees to the building department, and potentially opening up finished walls so inspectors can view the underlying electrical, plumbing, or framing.
- Negotiate a Price Credit: If you are willing to take on the risk of correcting the unpermitted work yourself after closing, you can negotiate a price reduction or a credit toward your closing costs. Be sure to obtain bids from licensed contractors first, as bringing unpermitted work up to code is often significantly more expensive than standard renovations.
- Consult with Your Lender and Insurer: Some mortgage lenders will not finance a home if a significant portion of its square footage is unpermitted, and some home insurance companies will exclude unpermitted structures from coverage. Ensure your service providers are fully aware of the property's permit status before you waive your contingencies.
Next Step for Home Buyers
Before you submit an offer or waive your inspection contingencies on a home in San Bernardino County, contact a licensed home inspector or a structural engineer to walk through the property with you. They can compare the physical structure with the municipal permit records you pull, helping you identify discrepancies before they become your financial burden.
What San Bernardino County Is Permitting Right Now
Building has slowed across San Bernardino County, with the steeper fall on the apartment side. Multifamily permits are down 39.5% to 1,270 units; single-family is down 7.8%, from 2,316 to 2,135. Total permitted units are down 22.9%, 4,416 to 3,405. In a county this large geographically, a countywide figure hides a lot of variation between the valley cities and the desert — treat it as background, not as a read on one address.
Source: US Census Bureau Building Permits Survey, county file, year to date through July 2026 against the same months of 2025. 93.7% of these units were reported directly by permit offices; the rest are Census estimates for offices that did not report.
Looking Up Permits Elsewhere
The portals differ by jurisdiction, but the method is the same everywhere. For the general process — finding the right authority, reading permit statuses, and spotting work that was never permitted — see finding the right permit office anywhere.