{"id":2647,"date":"2026-03-17T20:49:51","date_gmt":"2026-03-17T20:49:51","guid":{"rendered":"https:\/\/assessorstg.wpengine.com\/?page_id=2647"},"modified":"2026-04-24T22:29:39","modified_gmt":"2026-04-24T22:29:39","slug":"parcel-maps","status":"publish","type":"page","link":"https:\/\/www.acassessor.org\/es\/frequently-asked-questions\/parcel-maps\/","title":{"rendered":"Parcel Maps"},"content":{"rendered":"[et_pb_section fb_built=”1″ _builder_version=”4.27.6″ custom_margin=”0px|||||” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.6″ custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.6″ global_colors_info=”{}”][et_pb_text _builder_version=”4.27.6″ header_2_font_size=”32px” header_2_line_height=”1.4em” global_colors_info=”{}”]\n

About Assessor Parcel Maps<\/h1>\n

The Alameda County Assessor’s Office maintains assessor parcel maps for all properties in the county. These maps are used for assessment purposes and are an important resource for property owners, real estate professionals, and the public. Below are answers to commonly asked questions about parcel maps.<\/p>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ custom_padding=”10px||10px||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.6″ custom_padding=”10px||10px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.6″ global_colors_info=”{}”][et_pb_text _builder_version=”4.27.6″ header_3_font=”|700|||||||” header_3_text_color=”#1a3c6e” custom_margin=”||5px||false|false” global_colors_info=”{}”]\n

General Information<\/h3>\n[\/et_pb_text][et_pb_toggle title=”What are Assessor Parcel Maps?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]Assessor parcel maps show parcel boundaries, parcel numbers (APNs), dimensions, acreage, street addresses, and related map references. They are compiled from recorded documents, government surveys, and other official records maintained by the county.[\/et_pb_toggle][et_pb_toggle title=”Are Assessor Parcel Maps legal documents?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]No. Assessor parcel maps are prepared for assessment purposes only<\/strong>. They are not legal surveys and should not be used to determine exact property boundaries or resolve boundary disputes. For legal boundary determinations, you should consult a licensed land surveyor.[\/et_pb_toggle][et_pb_toggle title=”How can I view Assessor Parcel Maps?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” hover_enabled=”0″ border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}” sticky_enabled=”0″]You can view parcel maps online using our Assessor Parcel Viewer<\/a>. Maps are also available for review in person at the Assessor’s Office during regular business hours.[\/et_pb_toggle][et_pb_text _builder_version=”4.27.6″ header_3_font=”|700|||||||” header_3_text_color=”#1a3c6e” custom_margin=”30px||5px||false|false” global_colors_info=”{}”]\n

Parcel Numbers<\/h3>\n[\/et_pb_text][et_pb_toggle title=”What is an Assessor Parcel Number (APN)?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]An Assessor Parcel Number is a unique identification number assigned to every parcel of land in the county. The APN is used for assessment and tax purposes to identify individual properties.[\/et_pb_toggle][et_pb_toggle title=”When does a parcel number change?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]Parcel numbers may change when parcels are subdivided, combined, or when boundaries are adjusted through recorded maps or deeds. Changes to parcel numbers typically become effective in the following tax year.[\/et_pb_toggle][et_pb_toggle title=”How long does it take to create a new parcel number?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]The time required to create a new parcel number varies depending on the complexity of the recorded document. Please note that parcel map processing may be paused during May and June each year due to annual tax roll preparation.[\/et_pb_toggle][et_pb_text _builder_version=”4.27.6″ header_3_font=”|700|||||||” header_3_text_color=”#1a3c6e” custom_margin=”30px||5px||false|false” global_colors_info=”{}”]\n

Property Boundaries and Descriptions<\/h3>\n[\/et_pb_text][et_pb_toggle title=”Can the Assessor’s Office tell me where my property boundaries are?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]No. The Assessor’s Office cannot determine or verify exact property boundaries. Parcel maps are approximate representations for assessment purposes only. To determine actual property boundaries, you should hire a licensed land surveyor.[\/et_pb_toggle][et_pb_toggle title=”Where can I find the legal description of my property?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]Legal descriptions of property appear on recorded deeds and other recorded documents. These documents are available through the Alameda County Clerk-Recorder’s Office<\/a>.[\/et_pb_toggle][et_pb_toggle title=”Can I get information about easements on my property?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]Easement information is typically found in recorded documents at the County Clerk-Recorder’s Office. The Assessor’s Office does not maintain comprehensive easement records.[\/et_pb_toggle][et_pb_text _builder_version=”4.27.6″ header_3_font=”|700|||||||” header_3_text_color=”#1a3c6e” custom_margin=”30px||5px||false|false” global_colors_info=”{}”]\n

Parcel Modifications<\/h3>\n[\/et_pb_text][et_pb_toggle title=”How do I combine or subdivide my property?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]\n

Property combines or subdivisions requires approval from your local city or county planning department. Contact your local planning department for information about the subdivision process, required permits, and fees.<\/p>\n[\/et_pb_toggle][et_pb_text _builder_version=”4.27.6″ header_3_font=”|700|||||||” header_3_text_color=”#1a3c6e” custom_margin=”30px||5px||false|false” global_colors_info=”{}”]\n

GIS and Technical Questions<\/h3>\n[\/et_pb_text][et_pb_toggle title=”Why do parcel boundaries on the online map viewer not always match recorded documents?” _builder_version=”4.27.6″ title_font=”|600|||||||” title_font_size=”16px” body_font_size=”15px” custom_margin=”0px||0px||false|false” custom_padding=”15px||15px||false|false” border_width_all=”0px” border_width_bottom=”1px” border_color_bottom=”#e0e0e0″ global_colors_info=”{}”]Parcel boundaries displayed in the online viewer may shift slightly due to aerial photo overlays and the limitations of converting recorded document data to digital map formats. There may also be a processing delay of several weeks before newly recorded changes appear in the viewer.[\/et_pb_toggle][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.27.6″ background_color=”#f5f7fa” custom_padding=”30px||30px||false|false” global_colors_info=”{}”][et_pb_row module_id=”#contact-pre-footer-parent” _builder_version=”4.27.6″ custom_padding=”27px||27px||false|false” custom_css_free_form=”#contact-pre-footer-parent:first-child, #contact-pre-footer-parent:last-child {|| padding-top: 27px !important;||}||||.et_pb_section_2 .et_pb_column:last-child {|| padding-top: 27px !important;||}” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.6″ global_colors_info=”{}”][et_pb_text module_id=”contact-pre-footer” _builder_version=”4.27.6″ text_text_color=”#333333″ header_3_font=”|700|||||||” header_3_text_color=”#1a3c6e” text_orientation=”center” hover_enabled=”0″ custom_css_free_form=”#contact-pre-footer p {|| color: #333333 !important||}” global_colors_info=”{}” sticky_enabled=”0″]\n

Contact Us<\/h3>\n

For questions about parcel maps, please contact:<\/p>\n

Phone:<\/strong> (510) 272-3787
Main Office:<\/strong> 1221 Oak Street, Room 145, Oakland, CA 94612
Public Lobby Hours:<\/strong> 9:00 AM to 4:30 PM, Monday through Friday (except holidays)
Online:<\/strong> Assessor Parcel Viewer<\/a><\/p>\n[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]\n","protected":false},"excerpt":{"rendered":"

About Assessor Parcel Maps The Alameda County Assessor’s Office maintains assessor parcel maps for all properties in the county. These maps are used for assessment purposes and are an important resource for property owners, real estate professionals, and the public. Below are answers to commonly asked questions about parcel maps.General InformationAssessor parcel maps show parcel […]<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":2649,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"

Parcel Map Frequently Asked Questions<\/h2>\r\n\r\n

The Alameda County Assessor's Office maintains assessor parcel maps for all properties in the county. These maps are used for assessment purposes and are an important resource for property owners, real estate professionals, and the public. Below are answers to commonly asked questions about parcel maps.<\/p>\r\n\r\n

General Information<\/h3>\r\n\r\n

What are Assessor Parcel Maps?<\/h4>\r\n

Assessor parcel maps show parcel boundaries, parcel numbers (APNs), dimensions, acreage, street addresses, and related map references. They are compiled from recorded documents, government surveys, and other official records maintained by the county.<\/p>\r\n\r\n

Are Assessor Parcel Maps legal documents?<\/h4>\r\n

No. Assessor parcel maps are prepared for assessment purposes only<\/strong>. They are not legal surveys and should not be used to determine exact property boundaries or resolve boundary disputes. For legal boundary determinations, you should consult a licensed land surveyor.<\/p>\r\n\r\n

How can I view Assessor Parcel Maps?<\/h4>\r\n

You can view parcel maps online using our Assessor Parcel Viewer<\/a>. Maps are also available for review in person at the Assessor's Office during regular business hours.<\/p>\r\n\r\n

Parcel Numbers<\/h3>\r\n\r\n

What is an Assessor Parcel Number (APN)?<\/h4>\r\n

An Assessor Parcel Number is a unique identification number assigned to every parcel of land in the county. The APN is used for assessment and tax purposes to identify individual properties.<\/p>\r\n\r\n

When does a parcel number change?<\/h4>\r\n

Parcel numbers may change when parcels are subdivided, combined, or when boundaries are adjusted through recorded maps or deeds. Changes to parcel numbers typically become effective in the following tax year.<\/p>\r\n\r\n

How long does it take to create a new parcel number?<\/h4>\r\n

The time required to create a new parcel number varies depending on the complexity of the recorded document. Please note that parcel map processing may be paused during May and June each year due to annual tax roll preparation.<\/p>\r\n\r\n

Property Boundaries and Descriptions<\/h3>\r\n\r\n

Can the Assessor's Office tell me where my property boundaries are?<\/h4>\r\n

No. The Assessor's Office cannot determine or verify exact property boundaries. Parcel maps are approximate representations for assessment purposes only. To determine actual property boundaries, you should hire a licensed land surveyor.<\/p>\r\n\r\n

Where can I find the legal description of my property?<\/h4>\r\n

Legal descriptions of property appear on recorded deeds and other recorded documents. These documents are available through the Alameda County Clerk-Recorder's Office<\/a>.<\/p>\r\n\r\n

Can I get information about easements on my property?<\/h4>\r\n

Easement information is typically found in recorded documents at the County Clerk-Recorder's Office. The Assessor's Office does not maintain comprehensive easement records.<\/p>\r\n\r\n

Parcel Modifications<\/h3>\r\n\r\n

How do I subdivide my property?<\/h4>\r\n

Property subdivision requires approval from your local city or county planning department. Contact your local planning department for information about the subdivision process, required permits, and fees.<\/p>\r\n\r\n

Can I combine two or more parcels?<\/h4>\r\n

Parcels may be eligible for combination if they meet certain requirements, including same ownership, contiguous boundaries, same tax rate area, and no delinquent taxes. Contact the Assessor's Office for more information about the parcel combination process.<\/p>\r\n\r\n

GIS and Technical Questions<\/h3>\r\n\r\n

Why do parcel boundaries on the online map viewer not always match recorded documents?<\/h4>\r\n

Parcel boundaries displayed in the online viewer may shift slightly due to aerial photo overlays and the limitations of converting recorded document data to digital map formats. There may also be a processing delay of several weeks before newly recorded changes appear in the viewer.<\/p>\r\n\r\n

Contact Us<\/h3>\r\n

For questions about parcel maps, please contact:<\/p>\r\n