Maricopa County Assessor Property Search | Parcel Search & Maps

Key Property Search Resources in Maricopa County, Arizona

Maricopa County property information is primarily maintained by the Maricopa County Assessor's Office, which keeps parcel-level records, assessments, and basic details about land and improvements. For wider context on other public record types across the state, you can also review Arizona Public Records.

Before you start searching, gather the best identifiers you have for the property, such as the parcel number, full situs address, and the owner’s name, and remember that online records can lag behind recent ownership changes, new construction, or corrections. This independent guide is not a government site and does not provide legal or tax advice; always confirm critical details directly with county offices or your own professional advisers.

  • Have the parcel number, address, or owner name ready when you search.
  • Use Assessor records for assessment and basic property details, not legal title.
  • Expect some delay between real-world changes and what appears online.
  • Contact county staff if you see possible errors or missing parcels.

Maricopa County Property Search Overview

In Maricopa County, parcel-level information flows through the Assessor’s systems, which track real and personal property so that values can be assigned for tax purposes. The Assessor manages a very large number of parcels and accounts, and the online tools are meant to help you look up a specific property rather than provide a full title history.

When you open a property record, you can generally expect to see key identifiers such as the parcel or account number, the situs (physical) address, the current owner name, and the basic property type. Many records also show details such as land use, building characteristics, and legal description fields drawn from recorded plats or other sources.

Assessment values shown in the Assessor tools are based on mass appraisal methods that consider data such as prior sales, zoning, and property characteristics, and they may not match a private appraisal or the price a particular buyer and seller agree to. These values are primarily used to calculate property taxes and may differ from current market value or contract prices in real estate transactions.

If you are trying to understand how assessment information fits into the broader tax picture, you can review county-level billing and payment information in the property tax resources as a complement to the search tools, such as the overview in Maricopa County property tax guidance. The parcel number and owner details you find in the Assessor record are also useful search keys when you later look up deeds, mortgages, or other land records with the Maricopa County Recorder's Office or through a title company.

Where to Start with the Assessor Property Search

The main starting point for parcel-level research in Maricopa County is the official website of the Maricopa County Assessor's Office, which offers a property search, a customer portal, and access to forms, exemption information, and valuation notices. From there you can look up a parcel, review assessment values, and in many cases start online processes such as filing certain forms or appeals.

For the smoothest search experience, the Assessor recommends using the parcel number (also called the parcel ID or APN) whenever you have it, because this is the most precise way to identify a property. If you do not have the parcel number, you can still begin with the street address or the owner’s name, but you may need to review a list of matching results before selecting the correct parcel.

Map-focused users often prefer to begin in the Assessor’s Parcel Viewer or the county’s GIS mapping applications, which let you pan and zoom across Maricopa County and then click on a parcel footprint to see linked assessment information. These mapping tools are useful for confirming a property’s approximate location, neighboring parcels, and geography before you move into more detailed record review.

If you need in-person or phone assistance, property valuation questions usually go to the Assessor’s Office, while tax bill and payment issues are handled by the Treasurer’s Office. The table below summarizes the primary offices involved in property search and tax questions for Maricopa County.

Facility Name Physical Address Phone Number
Maricopa County Assessor's Office 301 W Jefferson Street Phoenix, AZ 85003 (View on Google Maps) 602-506-3406
Maricopa County Treasurer's Office Refer to Official Portal 602-506-8511

The Assessor’s property search supports several lookup methods, and the system is designed to accept whichever information you have available. To begin, open the Assessor property search page and choose the search option that best matches the details you know about the property.

Searching by parcel number is usually the most accurate approach. The Assessor’s guidance explains that the system accepts parcel numbers in different formats, including versions with or without dashes and with split letters when a parcel has been divided. Instead of guessing the format, type the number as shown on your tax bill, Notice of Valuation, or any example given on the search page itself.

If you do not know the parcel number, you can search by address using a standard street format such as house number, directional (for example E, N, S, W, NE, NW, SE, SW), street name, and an abbreviated street type like ST or AVE. The Assessor notes that city, state, and ZIP code can often be omitted, but the street direction and type abbreviations matter, and a broad address search may return several similar properties that you will need to review carefully.

Owner-name searches are also available, but results depend on spelling and formatting; the Assessor recommends entering the full first name rather than abbreviations. Beyond parcel, address, and owner lookups, the system can search by subdivision name, Maricopa County Recorder (MCR) number, city or ZIP code, section-township-range combinations, business name or account number for business personal property, and owner, address, account number, or VIN when you are searching for mobile homes.

If a parcel number that used to work no longer returns a record, it may have been split or combined into new parcels. In that situation, follow any hints shown in the Assessor search results and consider using address or owner searches instead. If you still cannot find the property, you can request a parcel history report from the Assessor’s public assistance staff, for example by emailing asr.pa@maricopa.gov as directed in their search help material.

  • Use parcel number (APN) whenever possible for the most precise match.
  • Address searches work best with standard abbreviations for directions and street types.
  • Owner searches require careful spelling and may list multiple matching parcels.
  • Subdivision, MCR, city or ZIP searches are useful when you are exploring an area rather than a single parcel.

Understanding Assessor Property and Valuation Results

After you select a record from the search results, the detail page will usually show the parcel or account number, situs address, current owner name, and property type at the top. You may also see subdivision or condominium information, legal description text, and links or tabs for related documents such as valuation notices or exemption details.

Many Maricopa County records include land and building characteristics that help explain how the property is assessed. Typical fields can include the year a structure was built, living area or square footage, lot size or acreage, construction style, and other components that the Assessor’s office uses in its mass appraisal models.

Valuation sections often distinguish between figures like Full Cash Value (which in the Assessor’s business personal property guidance is defined in terms of replacement cost new less depreciation), Limited Property Value where applicable, and the assessed value that results from applying a statutory assessment ratio to the value. There may also be a legal class code that reflects how the property is used, which in turn affects how much of the value is taxed.

It is normal for Assessor values to differ from listing prices, recent sales, or private appraisals, because the valuation system is built to treat many properties consistently rather than to match each individual transaction. When you want to compare assessment information with broader market data, you may need to look at recent sales, work with a real estate professional, or consult other sources such as the statewide context in Arizona Property Search, always keeping in mind that the Assessor numbers are primarily for property tax purposes.

Keep in mind that the Assessor’s detail page is not a substitute for a full title search or survey. Recorded deeds, mortgages, easements, and plat maps are kept by the county recording office, and property tax bills and payment status are handled by the Maricopa County Treasurer’s Office rather than the Assessor. For legal, lending, or closing work, you may need certified documents or professional advice in addition to what you see on the Assessor’s screens.

Parcel Viewer Maps and GIS Options in Maricopa County

The Assessor’s Parcel Viewer is an interactive web map that shows parcel boundaries over aerial imagery and other base maps, with tools for zooming and panning across Maricopa County. From the map you can use the search tools to look up parcels by number or other criteria, then click on a parcel shape to open a panel with related assessment information.

To explore a specific area, you can enter a parcel number, address, or other search term in the Parcel Viewer and let the map zoom to the matching location, or you can simply navigate to the neighborhood and select a parcel with the mouse. When you are ready to see the map for yourself, you can launch the Assessor Parcel Viewer and experiment with the tools described in the on-screen help.

The Parcel Viewer includes detailed warnings that its data is for general information only, that parcel boundaries on the map may not perfectly match recorded survey documents, and that information is not updated in real time. It is not a replacement for a title report or property survey, and users are encouraged to independently research and verify all information with the appropriate county offices before relying on it for legal or transactional purposes.

Beyond the Assessor map, Maricopa County also maintains a GIS Mapping Applications page with additional web maps for parcels, overdue property taxes, historical aerial imagery, planning and zoning data, survey points, floodplains, transportation, and environmental information. For a broader map-based view of these county layers, you can browse the county GIS mapping tools and then return to the Assessor search when you need parcel-specific assessment details.

  • Use the Assessor Parcel Viewer to see parcel boundaries and click through to assessment data.
  • Check county GIS maps for context such as overdue property taxes, historical aerials, or flood-related layers.
  • Rely on recorded documents and surveys, not map lines, for exact legal boundaries.

Limitations, Appeals, and Next Steps for Maricopa County Parcels

Online property records and maps for Maricopa County are powerful tools, but they do have limits. The Assessor’s office explicitly cautions that its datasets and map layers may contain errors or omissions, that information is not updated in real time, and that illustrated parcel boundaries are for reference only. For anything that needs to be exact, such as boundary determination or easement location, you will need recorded documents and, where appropriate, professional surveying or legal advice.

Assessor records focus on how property is identified, classified, and valued for tax purposes, not on every detail that might matter in a sale, development, or dispute. Deeds, liens, and other land records are filed with the county recording office, and zoning, floodplain, or environmental constraints may be documented through planning, flood control, or environmental health agencies whose maps appear in the GIS tools. Treat the Assessor search and Parcel Viewer as starting points that you combine with recorded documents and other county resources as needed.

If you believe a valuation, classification, or factual detail is wrong, Maricopa County has a structured appeal and correction process. The Assessor’s appeal materials explain when to use a Petition for Review of Valuation, when a Taxpayer Notice of Claim may be appropriate to correct older factual errors, and how a Residential Legal Class Change form can be used when a property becomes your primary residence. Each process has specific filing deadlines and documentation requirements, and the county emphasizes that unsupported appeals may be denied.

Mobile home owners and business personal property owners have their own appeal timelines once Notices of Valuation are mailed for those property types, and the Assessor provides separate forms and email contacts such as ASRAppeals@maricopa.gov and AssessorRD@maricopa.gov for questions about appeals. For other questions about valuation details or account-specific issues, you can submit an inquiry through the Assessor’s online question form or schedule a virtual appointment with public assistance staff.

A simple way to move forward is to start online with the Assessor property search and Parcel Viewer, then contact the Assessor’s Office if you cannot find a parcel, see obvious data issues, or need help with exemptions or valuation concerns. For questions about your tax bill or payment status, reach out to the Maricopa County Treasurer’s Office using the contact information shown on your tax notice. For decisions about buying, selling, or disputing property taxes, this site cannot give legal or tax advice, so consider consulting a qualified professional who can review your specific situation.

  • Maricopa County Assessor's Office: handles parcel identification, property characteristics, exemptions, and valuation questions; public assistance staff can be reached using the phone number and address shown in the contact table above or through the inquiry options on the Assessor website.
  • Maricopa County Treasurer's Office: is responsible for issuing property tax bills, collecting payments, and answering questions about delinquent taxes or tax liens; use the contact details on your tax notice or the Treasurer resources referenced earlier.
  • Appeals and valuation disputes: for clarification on appeal options or deadlines, you can email AssessorRD@maricopa.gov or ASRAppeals@maricopa.gov, referencing your parcel or account number and the tax year in question.

What if I cannot find my Maricopa County parcel using the parcel number?
If the Assessor search does not return a result for a parcel number, the parcel may have been split or combined, or the number may have changed. Use the official Assessor portal to search by address or owner instead, and if you still cannot locate it you can request a parcel history report from the Assessor's Office (for example by emailing asr.pa@maricopa.gov as directed on their site).

How long do I have to appeal a Maricopa County property valuation notice?
According to the Assessor's appeal guidance, property owners usually have 60 days from the Notice of Valuation mailing date to file a Petition for Review of Valuation with the Maricopa County Assessor's Office, but you should always confirm the exact deadline printed on your own notice or on the Assessor website.