Marin County Assessor Property Search, APN Lookup & Property Tax Records 2026
A Marin County property search may begin with a San Rafael address, Novato tax bill, Mill Valley hillside parcel, Tiburon estate, coastal lot, condominium, trust transfer, or recorded deed. The useful answer is rarely found in one system. This guide shows how to identify the APN, open the official Assessor tax roll, review parcel maps, check the actual tax bill, locate deeds, update a mailing address, request an informal value review, and prepare for a formal assessment appeal without confusing the responsibilities of separate county offices.
Quick Answer: How to Search Marin County Property Records
Start with the official Marin County Assessor Records and Maps search when you already know the Assessor Parcel Number (APN). The official Assessor search is organized around parcel number and map book/page; it should not be described as a public owner-name search.
If you only know the street address, use MarinMap to locate the property ID or APN, then confirm the parcel in the Assessor tax-roll search. Use the Department of Finance tax-bill portal for the amount due or payment status, and use the Recorder’s Official Records index when you need deeds, liens, easements, or grantor/grantee records.
Marin County Property Office Router
Select your task to find the correct official office or search system.
Your result will appear here
Select the task that best matches your problem.
Important: Planning help only. Not an official tax bill, legal survey, title report, appraisal decision, exemption approval, or government determination.
APN and Property Search Path Helper
Use this when you are unsure whether to start with the Assessor, MarinMap, tax bill, or Recorder.
Search guidance
Choose what you know and what you need. This helper does not access county records.
Important: MarinMap boundaries are representational only, and the Assessor tax-roll search should not be treated as a title report.
California Supplemental Property Tax Estimator
Estimate possible supplemental tax after a purchase, ownership change, or new assessed value.
Supplemental planning result
Enter the new and prior assessed values to estimate the taxable value difference.
Important: Estimate only. Not an official Marin County tax bill, escrow calculation, appraisal, exemption decision, or payment amount.
Who This Marin County Property Guide Is For
Review the APN, assessed value, parcel map, Homeowners’ Exemption, mailing address, informal review, or appeal process.
Compare the Assessor record, current tax bill, MarinMap parcel, Recorder documents, zoning context, and possible supplemental assessment.
Verify where tax notices are mailed and avoid assuming that a non-primary residence qualifies for a Homeowners’ Exemption.
Use the Recorder for documents and the Assessor for reassessment, exclusions, Prop 19, and mailing-address questions.
Use MarinMap for orientation, then verify zoning, permits, access, hazards, easements, and buildability with the responsible planning and professional sources.
Save the APN, write down your question, call before visiting, and keep every confirmation, form copy, and receipt.
What This Page Helps You Complete
Locate the parcel from an address through MarinMap, then confirm the APN through the official Assessor records search.
Use the Assessor for enrolled value and the Department of Finance for the actual secured or unsecured tax bill.
Use the Recorder’s index for grantor/grantee records, deeds, liens, easements, and recorded maps.
Submit the Assessor’s official mailing-address request rather than changing an address only with the post office or lender.
Confirm principal-residence, age, disability, transfer, and filing requirements with the Assessor.
Start with a free informal review, then use the formal appeals process if the disagreement remains unresolved.
Marin County Assessor Quick Facts
| Item | Verified Detail | Official Next Step |
|---|---|---|
| Official department | Marin County Assessor-Recorder-County Clerk | Open the official department website |
| Elected officeholder | Shelly Scott, Assessor-Recorder-County Clerk | Verify current officeholder information before formal correspondence. |
| Assessor office | 3501 Civic Center Drive, Suite 208, San Rafael, CA 94903 | Call before visiting if you need a specific form or staff specialist. |
| Real property phone | (415) 473-7215 | Call Assessor staff |
| Office hours | Monday–Friday, 9:00 AM–4:00 PM | Verify holidays and temporary closures before traveling. |
| Assessor record search | Search by Assessor Parcel Number; maps by map book and page | Open Assessor Records and Maps |
| Address-based map search | MarinMap supports address or property-ID search | Open MarinMap |
| Tax bills and payments | County of Marin Department of Finance | Open the official tax-bill portal |
| Recorded documents | Recorder’s Official Records index | Search official recorded-document index |
| Regular appeal filing period | July 2 through September 15 | Verify the applicable assessment type and current deadline before filing. |
How to Use the Official Marin County Assessor Property Search
The official Assessor Records and Maps service searches the Assessor’s tax-roll information by parcel number. It also lets users open Assessor map pages by map book and page. The page states that its information is extracted from the equalized tax roll and reflects the most recent tax bill.
Look at the secured property tax bill, closing statement, deed-related paperwork, MarinMap result, or prior Assessor correspondence.
Keep leading zeros and use the county’s displayed APN format. Search results are capped, so narrow the search when necessary.
Save the APN and the displayed assessed-value or tax-roll details. Do not treat the search result as a title report, legal opinion, survey, or guarantee of current ownership.
Use Finance for the actual tax bill, MarinMap for location and map layers, and the Recorder for deeds or recorded documents.
What to Do When an APN Search Does Not Work
How Marin County APNs and Assessor Map Books Work
A Marin County Assessor Parcel Number identifies the parcel used in the assessment system. An official example is formatted like 099-123-45. The Assessor map search explains that the first three digits identify the map book and the next two digits identify the map page.
| APN Element | Example | How It Helps |
|---|---|---|
| Full APN | 099-123-45 | Use for the Assessor tax-roll search, tax-bill lookup, MarinMap, and county correspondence. |
| Map book | 099 | The first three APN digits can open the map-book index. |
| Map page | 12 | The next two digits can be combined with the map book to open a specific Assessor map page. |
| Parcel identifier | Final digits | Distinguishes the specific parcel represented on the map page. |
Marin County Search Examples for San Rafael, Novato, Southern Marin, and West Marin
For developed property in San Rafael, Novato, Larkspur, or Corte Madera, MarinMap may identify the parcel quickly from the address. Save the APN and confirm it in the Assessor search.
Do not rely on the building address alone. Match the unit, APN, tax bill, deed, and closing documents before payment or transfer.
Parcel geometry may help identify land, but zoning, slope, access, hazards, septic, easements, permits, and development rules require separate official review.
Vacant parcels may not have a searchable street address. Use the APN, MarinMap location, recorded map, and title documents.
Marin County Property Tax Bill Search, Payment Fees, and Due Dates
The Department of Finance creates and collects Marin County property tax bills. Use its official tax-bill portal for secured and unsecured bills, amount due, installment status, payment options, and receipts.
Open the official Marin County property tax bill portal or review official payment methods and fees.
Current Electronic Payment Fee Information
| Payment Method | Official County Page Currently States | What to Verify |
|---|---|---|
| E-check | No service fee | Bank routing, account number, parcel, bill year, and confirmation. |
| Credit card | 2.35% service fee, minimum $1.49 per transaction | Final service fee displayed before authorization. |
| Returned payment | $40 returned-check fee | Bank balance and posting status before retrying payment. |
Secured Property Tax Installment Calendar
| Installment | Due | Delinquent After |
|---|---|---|
| First installment | November 1 | December 10, subject to the county’s stated cutoff and holiday rules |
| Second installment | February 1 | April 10, subject to the county’s stated cutoff and holiday rules |
MarinMap Parcel Search, Zoning Lookup, and Property-Line Limits
MarinMap can search by address or property ID using an auto-suggest result. It is useful when you need to turn an address into an APN, see nearby parcels, review map layers, or locate vacant land.
Use the official MarinMap viewer to identify the property ID or APN, then verify the number through the Assessor records search.
The zoning lookup accepts address or parcel number. Vacant parcels may require parcel-number search.
Assessor maps are maintained for assessment purposes and may reflect recorded subdivisions, surveys, parcel combinations, and lot-line changes.
Marin County Assessor Forms and Record Updates
| Task | Correct Process | What to Prepare |
|---|---|---|
| Change tax-bill mailing address | Use the official Assessor mailing-address change service | APN, owner name, property address, old mailing address, new mailing address, signature. |
| Report change in ownership | Use the applicable change-in-ownership form and recorded-document workflow | Transfer date, buyer/seller or trust details, consideration, claimed exclusion, deed information. |
| Claim Homeowners’ Exemption | Submit the official BOE-266 claim through the Assessor | APN, ownership details, principal-residence date, signature. |
| Request informal assessment review | Use the Assessor’s official review form during the applicable filing period | APN, assessed value, January 1 evidence, comparable sales, condition details. |
| Claim Prop 19 benefit | Use the correct base-year transfer or family-transfer form | Original and replacement property details, age/disability/disaster eligibility, transfer dates. |
Search official ARCC forms or review mailing-address change guidance.
Homeowners’ Exemption, Proposition 19, and Other Tax Relief
| Program | Who It May Help | Current Safe Guidance |
|---|---|---|
| Homeowners’ Exemption | An eligible owner occupying the property as the principal residence | Provides up to a $7,000 reduction in assessed value. File by February 15 for the full exemption; Marin states that filing from February 16 through December 10 may qualify for an 80% partial exemption. |
| Proposition 19 base-year transfer | Some homeowners age 55 or older, severely disabled owners, and qualifying disaster victims | Confirm eligibility, timing, value calculations, and the proper claim form with the Assessor. |
| Parent-child or grandparent-grandchild exclusion | Certain qualifying family transfers involving a principal residence or family farm | Prop 19 significantly limits prior exclusion rules. Verify occupancy, value limits, filing, and transfer requirements. |
| Decline-in-value relief | Owners whose January 1 market value may be below the factored base-year value | Use the informal assessment review process and submit evidence during the county’s stated filing period. |
| Other agency exemptions | Properties billed by taxing agencies that offer separate exemption programs | Use the county’s property-tax exemption lookup and contact the listed taxing agency directly. |
Review Marin County Homeowners’ Exemption guidance and review official Proposition 19 information.
Free Informal Review and Formal Marin County Assessment Appeals
If you believe the Assessor’s enrolled value exceeds the property’s market value as of the applicable January 1 lien date, begin with an informal assessment review. Marin County describes informal review as a free appraisal by the Assessor’s Office.
Record the APN, assessed value, land and improvement values, tax year, and date of the value notice.
Use comparable sales, a qualified appraisal, photos, repair estimates, listing history, or factual property corrections relevant to the lien date.
The county’s decline-in-value guidance states that the review form is filed from July 1 through October 31. Verify the current year’s dates before submission.
The regular filing period is July 2 through September 15. Marin County currently lists a $50 non-refundable processing fee for each application.
Marin County Deeds, Liens, Easements, and Recorded Maps
Use the Recorder’s Official Records index when you need a recorded deed, lien, release, easement, map, or other document. The official Recorder service states that the grantor/grantee index covers records from 1973 to the present.
Use the Assessor and MarinMap to confirm that you are researching the correct parcel.
Record the document number, recording date, names, document type, and any book/page or map reference.
A public index search does not replace a title report, insured title search, legal advice, or professional review of easements and encumbrances.
Fees, Deadlines, Processing Delays, and What to Save
| Task | Verified or Safe Guidance | Common Delay | Keep This Proof |
|---|---|---|---|
| Assessor APN search | Normally immediate when the parcel number is valid | Missing leading zero, changed parcel, wrong county, search-limit issue | APN, screenshot, map book/page, date searched |
| Online tax payment | E-check currently has no service fee; card fee currently 2.35%, minimum $1.49 | Bank rejection, wrong parcel, processor delay, browser interruption | Tax bill, confirmation number, receipt, bank record |
| Mailing-address change | Processing varies; continue monitoring the official mailing address | Missing signature, APN mismatch, recent ownership transfer | Form copy, submission proof, email, updated tax bill |
| Informal assessment review | Free review; county guidance uses a July 1–October 31 filing period | Evidence outside the lien-date period, missing facts, incomplete form | Review form, comparable sales, photos, response letter |
| Formal assessment appeal | $50 non-refundable processing fee; regular period July 2–September 15 | Wrong assessment type, late filing, unsigned form, missing fee | Application copy, payment proof, confirmation letter, evidence packet |
| Ownership update after recording | Recorder and Assessor records may update on different schedules | Document review, trust or entity transfer, exclusion claim, incomplete ownership statement | Recorded deed, document number, transfer forms, Assessor correspondence |
Record Problems, Complaints, and Escalation Paths
| Problem | Best First Step | Correct Office |
|---|---|---|
| APN, characteristics, assessed value, or mailing address appears wrong | Save the record and contact real-property Assessor staff | Assessor, (415) 473-7215 |
| Tax bill, payment, penalty, or receipt problem | Save the bill and confirmation, then contact the Department of Finance | Property Tax Division |
| Deed, lien, easement, or recorded map question | Search the Recorder index and save the document reference | Recorder |
| Boundary or map-line dispute | Review recorded maps and obtain a professional survey | Recorder / licensed surveyor / title professional |
| Assessment value disagreement | Request informal review before formal appeal | Assessor / Assessment Appeals Board |
| Buildability, permit, zoning, hazard, or land-use question | Use APN and map data to contact the correct city or county planning agency | Applicable planning/building authority |
Decision Table: If You Need This, Use This Office or Tool
| If You Need | Use This Source | Official Action |
|---|---|---|
| APN, assessed value, tax-roll information, Assessor map | Marin County Assessor Records and Maps | Open Assessor search |
| Find an APN from an address or map location | MarinMap | Open MarinMap |
| Tax bill, payment status, online payment, receipt | Department of Finance tax-bill portal | Open tax-bill search |
| Deed, lien, easement, recorded map, document index | Marin County Recorder | Search Official Records |
| Homeowners’ Exemption or Prop 19 | Assessor exclusions and exemptions | Review exemption guidance |
| Free informal value review | Assessor review process | Open informal-review guidance |
| Formal assessment appeal | Assessment Appeals Board | Review formal appeal process |
Marin County Assessor Contact Information and San Rafael Office Map
Officeholder: Shelly Scott
Address: 3501 Civic Center Drive, Suite 208, San Rafael, CA 94903
Real property: (415) 473-7215
Business/personal property: (415) 473-7208
Hours: Monday–Friday, 9:00 AM–4:00 PM
Relay service: Dial 711
- APN with leading zeros.
- Property address and owner name shown on your documents.
- Tax year, assessment year, or notice date.
- Tax bill, deed, value notice, map, or closing statement.
- A short written description of the problem.
Call before visiting if you need a specific appraiser, form, exemption specialist, or deadline answer.
Documents to Gather Before You Search, File, Appeal, or Pay
Common Marin County Property Search Mistakes
The official Assessor records search is parcel-number based. Use the Recorder index for grantor/grantee document searches.
Enter the parcel number exactly as shown on the tax bill, county map, or official document.
Representational parcel geometry does not establish exact boundaries, easements, or buildable area.
The tax bill may include voter-approved debt, special assessments, parcel charges, penalties, and exemptions.
A purchase or ownership change may create one or more supplemental bills after closing.
Informal review and formal appeal have different deadlines, fees, and requirements.
Marin County Property Search Troubleshooting
| Problem | Likely Cause | What to Do Next |
|---|---|---|
| APN returns no result | Missing zero, formatting error, changed parcel, or incorrect county record | Confirm the APN in MarinMap, tax bill, deed, or with Assessor staff. |
| Only the address is known | The official Assessor search is parcel-number based | Use MarinMap to identify the property ID or APN, then return to the Assessor search. |
| Only the owner name is known | Owner-name lookup is not the public Assessor search path | Use the Recorder grantor/grantee index or obtain an address/APN from reliable documents. |
| Tax payment is not showing | Processor delay, failed payment, incorrect parcel, or bank issue | Do not immediately pay twice. Save proof and contact the Property Tax Division. |
| Deed owner and Assessor record differ | Recorder and Assessor processing timelines or a complex transfer | Save the recorded document number and ask the Assessor about update status. |
| Map line differs from fence or occupation | GIS geometry is representational and may not match a surveyed boundary | Use recorded maps, title records, and a licensed surveyor. |
| Assessed value appears too high | Market decline, factual error, reassessment, new construction, or ownership change | Gather January 1 evidence and request informal review before formal appeal. |
What to Save After a Search, Payment, Form, or Appeal
Property Search, Tax Payment, and Appeal Safety
Avoid websites that imitate county portals, sell basic tax-roll information without explaining the official free source, promise guaranteed tax reductions, or request payment before identifying the correct county office.
Marin County Property Search: Direct Answers
| What is the official Assessor search method? | Search the Assessor tax roll by APN and maps by map book/page. |
| How do I find an APN from an address? | Use MarinMap, select the suggested address, save the property ID or APN, and confirm it in the Assessor search. |
| Where do I pay taxes? | Use the County of Marin Department of Finance property tax portal. |
| Where do I search deeds? | Use the Marin County Recorder’s Official Records index. |
| Is an informal value review free? | Yes. Marin County describes the Assessor’s informal review as free. |
| What is the regular formal appeal period? | July 2 through September 15, with a currently listed $50 non-refundable fee per application. |
| Is MarinMap a legal survey? | No. Its parcel geometry is representational and should not be used as a legal boundary determination. |
Official Source Notes
Frequently Asked Questions
How do I search Marin County Assessor property records?
Use the official Marin County Assessor Records and Maps page and search by Assessor Parcel Number. If you only know the address, use MarinMap to find the APN first.
Can I search Marin County Assessor records by owner name?
The official public Assessor tax-roll search is presented as an APN search, not an owner-name search. Use the Recorder’s grantor/grantee index for recorded ownership documents.
How do I find a Marin County APN from an address?
Open MarinMap, begin typing the property address, select the matching suggestion, and save the displayed property ID or APN. Confirm the number through the official Assessor search.
How do I pay Marin County property taxes online?
Use the official County of Marin property tax bill portal. Confirm the APN, tax year, installment, amount due, and payment fee before submitting, then save the receipt.
What are Marin County’s current online payment fees?
The official payment page currently states that e-check has no service fee and card payments have a 2.35% service fee with a $1.49 minimum. Verify the amount displayed at checkout because fees may change.
When are secured Marin County property taxes due?
The first installment is due November 1 and becomes delinquent after December 10. The second installment is due February 1 and becomes delinquent after April 10, subject to official cutoff and holiday rules.
Is MarinMap a legal survey?
No. MarinMap states that parcel geometry is representational. Use recorded maps, title documents, and a licensed surveyor for exact boundaries, easements, or encroachments.
How do I find deeds or liens in Marin County?
Use the Marin County Recorder’s Official Records search. Save the document number, recording date, names, and document type. Use a title professional when you need a title conclusion.
How much is the Marin County Homeowners’ Exemption?
The exemption can reduce assessed value by up to $7,000 for an eligible principal residence. File by February 15 for the full exemption; verify partial and late-filing rules with the Assessor.
How do I request a lower Marin County assessed value?
Gather January 1 market evidence and submit the Assessor’s Request for Informal Assessment Review during the applicable filing period. Marin County describes informal review as free.
What is the Marin County assessment appeal deadline?
The regular formal appeal filing period is July 2 through September 15. Other assessment types may have different deadlines, so verify the applicable period before filing.
Where is the Marin County Assessor office?
The Assessor office is at 3501 Civic Center Drive, Suite 208, San Rafael, California 94903. The real-property phone number is (415) 473-7215, and official hours are Monday through Friday, 9:00 AM to 4:00 PM.
What to Do Next
Start by identifying the correct APN. Use the Assessor tax-roll search for assessed-value records, MarinMap for address and map research, Finance for the actual tax bill, and the Recorder for deeds or liens. Save every result and verify official details before paying, filing, appealing, buying, transferring, surveying, or relying on the record for a legal decision.