Uncovering unpermitted structural modifications or open construction permits after closing can result in costly municipal code enforcement actions, uninsurable property damage, or mandatory removal of unapproved structures. In a rapidly growing jurisdiction like Maricopa County, verifying that major alterations were properly permitted and inspected is one of the most effective ways home buyers can protect their investment.
Why Building Permit History Matters in Maricopa County
Maricopa County has experienced decades of intense residential construction and remodeling activity. Properties across the Phoenix metropolitan area frequently undergo major updates, including patio enclosures, detached casita additions, solar panel installations, and swimming pool construction.
When structural, electrical, or plumbing alterations occur without proper municipal permits and final inspections, home buyers inherit hidden risks. Unpermitted additions may not meet structural building codes, which can create safety hazards or lead to structural settling over time [ASHI]. Insurance carriers sometimes deny claims related to unpermitted work if an uninspected electrical or plumbing system causes property damage.
Beyond safety concerns, unpermitted work creates financial liability. Municipalities retain the legal authority to require property owners to bring non-compliant structures up to current building codes. In extreme cases, local authorities can issue order-to-vacate notices or require total demolition of unpermitted additions. Uncovering these issues before completing a real estate purchase gives buyers the opportunity to require seller remedies or adjust their offer accordingly [NAR].
Step 1: Identify the Correct Jurisdiction First
A common trap for home buyers searching Maricopa County permit records is assuming the county government oversees permits for every home within county borders. Maricopa County covers over 9,000 square miles and contains 27 incorporated cities and towns alongside vast unincorporated areas.
The Maricopa County Planning and Development Department only issues permits and maintains records for properties in unincorporated areas of the county. If a home sits within the incorporated boundaries of a city such as Phoenix, Mesa, Scottsdale, Chandler, Gilbert, Glendale, or Peoria, that specific city holds the permit history.
To determine which jurisdiction governs a specific property, start by looking up the parcel on the Maricopa County Assessor website:
- Navigate to the Maricopa County Assessor online parcel viewer or search database.
- Search using the physical street address or the nine-digit Assessor Parcel Number (APN).
- Locate the jurisdiction field in the parcel details, which indicates whether the home is in an incorporated city or unincorporated Maricopa County.
- Note the parcel number (APN), as online permit databases in Arizona frequently require the APN rather than the street address.
Step 2: Searching Unincorporated Maricopa County Records
If the Assessor lookup confirms the property lies in unincorporated Maricopa County, permit research goes directly through county systems. The Maricopa County Planning and Development Department maintains an online public search portal for land use, building, and environmental permits.
To search county-managed records online, follow these steps:
- Visit the Maricopa County Planning and Development Department online permit portal.
- Select the public record search function for building and construction permits.
- Enter the Assessor Parcel Number (APN) without dashes or spaces for the most accurate results, or search by street address.
- Review the list of issued, pending, expired, and finaled permits associated with the parcel.
County records typically detail the permit scope, applicant name, issuance date, status, and inspection history. Look closely at the status column for each entry. A status listed as Finaled or Closed indicates that municipal inspectors examined the completed work and confirmed code compliance.
Step 3: Checking Municipal Permit Portals for Incorporated Cities
If the parcel lookup reveals the home sits within an incorporated city, you must access that city's dedicated planning or building safety department database. Each municipality in Maricopa County manages its own digital record systems.
While each municipal portal operates slightly differently, the lookup process generally follows similar steps across major cities in the county:
- City of Phoenix: The Phoenix Planning and Development Department utilizes an online permit search system (ShapePHX / Phoenix Permit Search). Users can search historic permit activity using the address or parcel number.
- City of Scottsdale: Scottsdale offers an online eServices permit mapping and search tool where buyers can view plan reviews, contractor submittals, and building inspection logs.
- City of Mesa: Mesa maintains a municipal public records portal allowing address-based queries for building, plumbing, and electrical permits.
- City of Chandler / Town of Gilbert: Both municipalities offer online citizen access portals where building safety departments publish historical permit data.
If a city portal returns no results for a home built several decades ago, it does not automatically mean the home lacks permit history. Digital database transitions mean older records often remain archived offline.
Step 4: Accessing Older Permit Archives and Public Records Requests
Most municipal and county online databases in Arizona only archive fully digital records going back to the late 1990s or early 2000s. If you are researching a mid-century ranch home or an older subdivision built prior to digital recordkeeping, online portals may appear empty even if original permits were legally obtained.
When online searches yield incomplete records for an older home, submit a formal public records request:
- Contact the municipal clerk or county planning department public records division.
- Submit a written public records request under Arizona Public Records Law (A.R.S. Title 39).
- Provide the property address, parcel number, and original year built.
- Explicitly request microfiche archives, paper building plans, original certificate of occupancy records, and historical permit cards.
Processing public records requests for microfiche or physical file retrieval typically takes several business days. Plan ahead during the inspection contingency period to ensure records arrive before contract deadlines expire.
Step 5: Analyzing Permit Records for Red Flags
Once permit documents are in hand, compare the official record against the physical reality of the property. Mismatches between municipal records and actual site conditions often highlight unpermitted modifications.
Pay close attention to these key indicators:
- Square Footage Discrepancies: Compare the permitted square footage listed on official documents against the square footage shown on the seller disclosures and real estate listing. An extra bedroom, converted garage, or enclosed Arizona room not reflected in permit filings points to uninspected work.
- Open or Expired Permits: A permit listed as Open, Issued, or Expired means work was authorized, but the contractor never scheduled a final inspection. Unfinalized permits remain an open compliance issue on property title until cleared by municipal inspectors.
- Missing Infrastructure Permits: Major features like inground swimming pools, solar panel arrays, gas line extensions, or electrical subpanels require dedicated permits in Maricopa County. Missing records for these high-risk systems warrant further investigation.
- Failed Inspections: Review detailed inspection logs to ensure all failed preliminary inspections (such as rough electrical or framing checks) were subsequently re-inspected and marked as passed.
Resolving Permit Issues Before Closing
Discovering unpermitted work or open permits during property research does not automatically require walking away from a transaction, but it does require careful management before closing.
If an open permit exists, the buyer can request that the seller hire the original contractor or qualified tradespeople to schedule a final municipal inspection and close out the record. For unpermitted work that has already been completed, local building departments sometimes offer an as-built permit process. This requires a municipal inspector—and often a licensed professional engineer—to evaluate the concealed work, perform necessary testing, and retroactively sign off on compliance.
Never rely on verbal seller promises that unpermitted work was completed to code. Always route physical inspection concerns to a licensed home inspector or structural engineer, and consult a qualified real estate attorney or municipal planning officer regarding legal or code enforcement compliance [ASHI].
What to Do Next
Obtain the Assessor Parcel Number (APN) for the property you are researching from the Maricopa County Assessor website today. Use that parcel number to check the appropriate county or municipal permit portal to verify that all major additions, pool installations, and structural changes have documented final inspections before your inspection contingency period closes.
Where to Search Maricopa County Permits
For unincorporated Maricopa County, start at the Maricopa County Permit Center.
One detail catches people out on older houses: the county replaced its permitting system in June 2024. The Permit Center holds records from May 2009 onward. Closed permits, planning cases and violations from 1999 through June 2024 live in a separate Permit Viewer, reachable from the same Planning and Development pages. A property altered in, say, 2006 and again in 2021 may therefore have half its history in each. Finding nothing in one system is not evidence that no permit was pulled.
What Maricopa County Is Permitting Right Now
Maricopa County has the steepest decline in single-family permitting of any county in this set: down 15.4%, from 10,992 to 9,301 homes, a drop of 1,691. Multifamily fell further in percentage terms, down 25.6% to 5,448, taking the county total down 19.5%. Maricopa has been one of the largest new-build markets in the country, which is exactly why a fall of this size in house permits is worth noting before you read a permit history here.
Source: US Census Bureau Building Permits Survey, county file, year to date through July 2026 against the same months of 2025. 94.8% 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 reading permit records in any jurisdiction.