Clackamas County Tax Assessment Search & Records

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Clackamas County, Oregon · AscendWeb · RMV · MAV · AV · Tax Records

Search the Clackamas Assessment Record and Decode the Oregon Value Stack

Clackamas County property research starts with Assessment & Taxation’s AscendWeb system. Search the account by address or account number, verify the tax lot and property details, then compare Real Market Value, Maximum Assessed Value and Assessed Value before using the number for a tax, appeal or property-record decision.

Oregon’s system is different from a simple market-value-times-tax-rate model. This page shows which Clackamas County record to use, exactly how the official searches work, what the value fields mean, where to find current and archived tax statements, and what 2026 deadlines matter.

Start with the quick answer Search AscendWeb Understand RMV, MAV & AV
Correct office: Clackamas County does not use a separate “county auditor” as the primary property-assessment office. Property assessment and tax-account questions are handled by Clackamas County Assessment & Taxation. Recorded deeds and other real-property instruments are maintained separately by the County Clerk’s Recording Division.

Quick answer: start with AscendWeb for the property account

Use the official Clackamas County AscendWeb Property Search when you need the assessment account, values, tax information, sales history or property details. Search with an 8-digit account number when you have one; otherwise search by the property’s street address.

1 Find account Use the 8-digit account number or street address.
2 Verify parcel Check address, tax lot and property characteristics.
3 Decode values Compare RMV, MAV and AV.
4 Open right record Statement, map, payment, deed or appeal.

Clackamas County assessment facts

Official office Assessment & Taxation
Assessor / Tax Collector Bronson Rueda
Phone 503-655-8671
Assessment date January 1, 2026
Property search AscendWeb
Parcel map CMap
2026 statements Late October
First/full-pay date Nov. 16, 2026
Value appeal Dec. 31, 2026
Office hours Mon–Thu, 8 a.m.–4 p.m.
Current September 2026 status: the 2026–27 property-tax statements have not yet reached their normal late-October distribution stage. The 2026 Property Value Appeals Board filing period opens after statements are distributed and runs through Dec. 31, 2026.
Search AscendWeb Current tax statements Open CMap

Choose the Clackamas County record you actually need

Assessment values, current tax statements, historical statements, GIS maps and recorded deeds live in different systems. Use the task—not just the property address—to choose the next tool.

County record router

Do not use one Clackamas County database for every property question

A
ASCENDWEB Assessment
Tax balance
Property account
M
CMAP Tax lot
Parcel map
Aerial context
T
TAX STATEMENT Current year
Prior year
Taxing districts
R
RECORDING Deed
Mortgage
Recorded instrument
P
PVAB Value appeal
Evidence
Board hearing
Which official Clackamas County tool should you use?
You need
Official tool / office
Best identifier
Important limit
Assessment value, tax balance or property account
AscendWeb
8-digit account number or address
A property account is not a title report.
Current tax statement
Online Tax Statements
Parcel number or address
Certified statement data may not reflect later payments, corrections or delinquent interest.
Older tax statements
Tax Statement Archive
Tax year plus parcel number or address
Use AscendWeb for a current balance.
RMV / MAV history
Value History under Measure 50
Account number or address
Some property types do not have graph history.
Tax lot, map and aerial context
CMap
Address, tax lot or parcel number
Parcel lines are not survey-quality boundaries.
Deed or recorded real-property instrument
County Clerk Recording Division
Party/document/property information
Assessment account numbers are not legal descriptions.
Challenge 2026 value
Property Value Appeals Board
Assessor account number + Map/Tax Lot
The appeal is about property value, not simply the tax amount.
Search troubleshooting

What to try when AscendWeb does not find the Clackamas property

Exact address returns nothing? Enter fewer address components and try AscendWeb’s % wildcard between the house number and street name.
Too many address results? Add the city or ZIP code only after the simpler street search returns more candidates than you can reasonably compare.
You have an old tax statement? Use the 8-digit account number shown on the property records rather than repeating an address search.
Rural land has no useful street address? Use CMap to search by tax lot or parcel information and then connect the mapped parcel back to Assessment & Taxation.
You need the property owner’s name? CMap does not publish owner names online. Contact Assessment & Taxation at 503-655-8671 or propertytaxinfo@clackamas.us for owner information.
The boundary appears wrong? Treat CMap as reference mapping only. County GIS boundaries are not survey quality.
A recent deed does not match the tax account? Check the recorded instrument with the County Clerk and then ask Assessment & Taxation whether the ownership/account update has been processed.
You need a live tax balance? Do not rely on an archived tax statement. Return to AscendWeb because archived statements do not capture later payments or interest.
Useful Assessment & Taxation call script “I’m trying to identify the current property account for [address / tax lot]. I have [old account number, parcel number or deed information]. Can you confirm the correct account and tell me where to view the current assessment and tax balance?”
What the records can answer

Clackamas property records are split into several useful record sets

AscendWeb Property Account Summary Use it for the core assessment and tax account: property identification, characteristics, tax-code area, value information, tax balance, installments, receipts and sales information where available. Best for: “What does the County currently show for this account?”
Current Online Tax Statement Search the current tax year by parcel number or property address and view the certified statement. Best for: taxing districts, annual statement values and current-year bill layout.
Tax Statement Archive Select an older tax year and search by parcel number or address. Best for: comparing prior-year statements without treating them as a live balance.
Value History under Measure 50 Search by account number or address to compare historical Real Market Value and Maximum Assessed Value. Best for: understanding why RMV and taxable assessed value have moved differently over time.
CMap Search spatially by address, city, intersection, tax lot or parcel number and use aerial/map context to identify the right land. Best for: tax-lot and location questions, not legal boundary determination.
County Clerk Recording Use recorded real-property documents when your question concerns a deed, mortgage, lien or another instrument affecting title or an interest in real property. Best for: legal-document history rather than assessment value.
Tax-statement limitation: Clackamas County warns that online tax-statement information does not reflect tax payments, value corrections or delinquent interest posted after the certification date. Use the property-detail system for current account information.
Oregon Measure 50 terminology

RMV, MAV and AV answer three different questions

RMV Real Market Value is the Assessor’s estimate of what the property would sell for on the open market as of the January 1 assessment date.
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MAV Maximum Assessed Value is the Oregon Measure 50 value limit. It commonly changes by about 3% from year to year, although qualifying property changes can create exceptions.
→
AV Assessed Value is the lower of RMV and MAV. This is the value generally used as the starting taxable value before applicable exemptions and other tax rules.
How to read the Oregon values on a Clackamas property
Value
What it represents
Common mistake
Where to check
RMV
Estimated open-market value as of Jan. 1.
Assuming taxes are automatically calculated from RMV.
AscendWeb / tax statement
MAV
Measure 50 maximum assessed-value limit.
Expecting MAV to equal the current market price.
Property-detail and value-history tools
AV
The lesser of RMV or MAV.
Appealing RMV without checking whether a reduction would actually lower AV.
Tax statement / property account
Tax balance
Actual amount charged, paid or still due on the account.
Trying to derive a live balance from an old statement.
AscendWeb
Important appeal consequence: the County explains that if PVAB lowers RMV but RMV is still above MAV, the Assessed Value may remain unchanged. When AV does not change, the tax bill typically does not change simply because RMV was reduced.
RMV / MAV comparison tool

Check which value becomes the basic Assessed Value

Oregon AV calculator

Enter the Real Market Value and Maximum Assessed Value shown for a property. The lower amount is the basic Assessed Value under the RMV/MAV comparison.

This calculator does not apply veteran exemptions, special assessed values, Measure 5 compression or other parcel-specific tax adjustments.

RMV $650,000
MAV $380,000
Basic AV $380,000

In this example, MAV is lower than RMV, so MAV becomes the basic Assessed Value.

Current and historical statements

Use the tax-statement search when you need the actual annual record

Current-year statement

Open Online Tax Statements Use the official Clackamas County Online Tax Statements page.
Select the tax year The current-year search requires a tax-year selection before the property lookup is completed.
Search by parcel number or address Use the parcel number when available; otherwise begin typing the property address and choose the correct result.
Read the statement by section Check current and prior property values, taxing districts, education/general-government/bond taxes, payment options and total tax due.
Use AscendWeb for anything that changed later A certified tax statement is a dated record. Later payments, corrections and delinquent interest may not appear on that statement.

Older statements

Use the Clackamas County Tax Statement Archive when you need a prior-year statement. The archive uses the same practical search logic: choose the year, then search by parcel number or address.

Need value history rather than a statement PDF? Use the separate Value History under Measure 50 tool. It is built specifically to show historical RMV and MAV relationships for supported property types.
CMap parcel research

Use CMap when the question is “which tax lot is this?”

Clackamas County’s CMap is useful when the property cannot be identified cleanly from a street address or when you need mapped context before returning to the assessment account.

Search options CMap’s search box accepts an address, and its search selector can switch to other options such as city, intersection, tax lot or parcel number.
Aerial photography The map includes an aerial-photography control, which can help distinguish neighboring tax lots and improvements.
Owner information CMap does not publish property-owner names online. For owner information, the County directs users to Assessment & Taxation.
Boundary limitation CMap is a GIS reference tool. Its property boundaries are not survey quality and should not be used to decide a fence line, encroachment or legal boundary.
Open CMap instructions
2026–27 tax calendar

Clackamas County’s first 2026 property-tax deadline is Nov. 16

Oregon’s normal first property-tax payment date is Nov. 15. Because Nov. 15, 2026 falls on a Sunday, Clackamas County’s current 2026 guidance sets the first deadline at Monday, Nov. 16, 2026.

1
Jan. 1, 2026 Assessment date for the 2026–27 property value.
2
Late Oct. 2026 Tax statements are distributed and the PVAB filing window begins.
3
Nov. 16, 2026 Full payment or first installment deadline for the current cycle.
4
Feb. 16, 2027 Second one-third installment deadline when using the three-payment option.
5
May 17, 2027 Final installment deadline under the 2026–27 schedule.
2026–27 Clackamas County property-tax payment choices
Payment choice
Nov. 16, 2026
Later payment
Discount
Pay in full
Pay 100%
None
3%
Two-part option
Pay 2/3
Remaining 1/3 by May 17, 2027
2%
Three installments
Pay 1/3
1/3 Feb. 16 + 1/3 May 17, 2027
None
Official property-tax payment page Review all payment options
Current online convenience fees: Clackamas County’s payment page lists $3 for e-check, 2.49% for Visa/Mastercard/American Express/Discover credit cards, $3.95 for Visa debit and 2.49% for Mastercard debit. The County says these are payment-provider fees.
Bank bill-pay users: a payment initiated through your bank is not treated as received just because you scheduled it. It must reach and be posted by the County by the applicable deadline.
2026 property-value appeal

The 2026 PVAB filing window begins after tax statements are mailed

If you disagree with the value on the 2026 tax statement, Clackamas County’s Property Value Appeals Board can hear a current-year property-value appeal. The County says 2026 petitions will be accepted after statements are distributed in late October, with a filing deadline of Dec. 31, 2026.

Evidence date: your evidence should generally address the property’s value around Jan. 1, 2026, the assessment date for the current appeal cycle.
Read the tax statement first Confirm the current RMV and AV and identify exactly which value you are asking the board to change.
Check MAV before assuming an RMV reduction saves tax If RMV remains above MAV after a reduction, AV may stay unchanged and the tax bill may not fall.
Use Clackamas County’s own appeal forms The County specifically asks filers to use the forms linked from its PVAB page because those versions contain additional Clackamas filing information.
Prepare the account identifiers The checklist calls for the Assessor account number, Map and Tax Lot number, property address and a copy of the 2026 property-tax statement.
State both the current and requested values Do not submit a petition that simply says the tax is too high. State the value shown by the County and the value you believe the evidence supports.
Attach market-value evidence Useful evidence can include relevant sales, appraisal material, property-condition documentation, photographs, maps, income information or supported costs to cure defects.
Owner / taxpayer name
Phone and mailing address
Assessor account number
Map and Tax Lot number
2026 tax statement copy
Current 2026–27 values
Requested value
Basis of appeal
Market-value evidence
Signed petition / authority to represent
Paper evidence: Clackamas County’s PVAB instructions require five copies of petition/evidence for applicable mailed or delivered filings. If the Clerk must make copies, the current procedure lists a charge of $0.25 per page.
Official Property Value Appeals Board Clackamas appeal forms
Tax relief can change the bill

Check exemptions and deferral separately from the assessed value

Senior / disabled property-tax deferral

For 2026, Clackamas County’s state deferral guidance lists a $70,000 household-income limit, $500,000 net-worth limit and additional ownership, occupancy, insurance and RMV requirements.

Applications are normally filed between Jan. 1 and April 15 for taxes due the following fall. Deferred amounts accrue interest and become a lien that must eventually be repaid.

Senior / disabled deferral rules
Disabled veteran exemption

Clackamas County’s 2026 page lists a basic exemption of $27,092 of assessed value and $32,512 for the qualifying service-connected-disability category, subject to the program’s eligibility rules.

The normal filing deadline is April 1 for taxes due the following November.

Veteran exemption requirements
Why this matters when comparing tax records: two properties with similar AV can still produce different taxable outcomes when exemptions, special assessments, local tax districts or Measure 5 limitations apply.
Recorded real-property documents

Use the County Clerk when you need the deed rather than the tax account

Clackamas County’s Recording Division preserves public records involving real-property transactions. The County says ownership can be traced through records maintained by the division back to the early 1850s, and current recorded documents are generally indexed within two business days.

Assessment record vs recorded property document
Question
Use
Why
What values and taxes are on this account?
Assessment & Taxation / AscendWeb
This is the assessment and tax-account system.
What deed transferred title?
County Clerk Recording Division
The recorded instrument—not the assessment display—is the relevant land record.
What mortgage, lien or other recorded document exists?
Recording Division
These are recorded instruments affecting title or an interest in real property.
Where is the parcel on a map?
CMap
GIS provides visual parcel context.

Current recorded-record copy fees

$4 initial search + first page The current Recording fee schedule lists a $3.75 search charge plus $0.25 for the first copied page.
$0.25 each additional page Additional copied pages are currently listed at 25 cents each.
$3.75 certification Add the certification fee when you specifically need a certified recorded-record copy.
Legal-description warning: the Recording Division states that an Assessor map/tax-lot number or assessment account number is not, by itself, an acceptable legal description for recording purposes.
Clackamas County Recording Division Recording copy & document fees
Official office

Clackamas County Assessment & Taxation contact and map

Assessment and property-tax help

Office Clackamas County Assessment & Taxation
Assessor Bronson Rueda
Address
150 Beavercreek Road, Room 135, Oregon City, OR 97045
Phone 503-655-8671
Email propertytaxinfo@clackamas.us
Hours Monday–Thursday, 8 a.m.–4 p.m., except County holiday closures
Official page Assessment & Taxation
Search property Verify office information
Remote help: Clackamas County says customers can email questions and also provides a Zoom-meeting option through the Assessment & Taxation contact page.
10 Clackamas-specific answers

Clackamas County tax assessment search and records FAQs

1. What is the official Clackamas County property assessment search?

Use Clackamas County AscendWeb at ascendweb.clackamas.us. It supports an 8-digit account-number search and a street-address search for property-account, assessment and tax information.

2. How do I search AscendWeb when a Clackamas address is not matching?

Start with the street address and avoid unnecessary city, state or ZIP filters. AscendWeb specifically allows the percent sign (%) as a wildcard between the street number and street name, such as 123%Main.

3. What is the difference between RMV, MAV and AV in Clackamas County?

RMV is Real Market Value, MAV is Maximum Assessed Value under Oregon’s Measure 50 system, and AV is Assessed Value. AV is generally the lower of RMV or MAV and is the value used as the basic taxable assessment before applicable exemptions and other tax rules.

4. Where can I see a Clackamas property’s historical RMV and MAV?

Use the County’s Value History under Measure 50 tool at apps.clackamas.us/taxhistory/. It supports searches by account number or address, although graphs are not available for every property category.

5. Can I find a Clackamas County property owner in CMap?

CMap does not publish property-owner names online. The County directs users who need owner information to Assessment & Taxation at 503-655-8671 or propertytaxinfo@clackamas.us.

6. Where can I find old Clackamas County property-tax statements?

Use the County’s Online Tax Statement Archive. Select the tax year and search using the parcel number or address. For a live balance, return to AscendWeb because archived statements do not reflect later payments, corrections or delinquent interest.

7. When is the first Clackamas County property-tax payment due for 2026–27?

The County’s 2026 guidance sets the first/full-payment date at Nov. 16, 2026 because the normal Nov. 15 date falls on a Sunday. Full payment by that deadline receives a 3% discount, while paying two-thirds receives a 2% discount.

8. When can I appeal a 2026 Clackamas County property value?

The 2026 Property Value Appeals Board filing period opens after tax statements are distributed in late October. The deadline is Dec. 31, 2026. Evidence should generally address the property’s value near the Jan. 1, 2026 assessment date.

9. Will lowering RMV always lower my Clackamas County property tax?

No. If the reduced RMV is still higher than MAV, the property’s AV can remain unchanged. When AV does not change, lowering RMV alone will typically not reduce the tax calculated from the assessed value.

10. Where do I get a Clackamas County deed or other recorded property document?

Use the Clackamas County Clerk Recording Division at 1710 Red Soils Court, Suite 110, Oregon City. The Recording Division maintains deeds and other instruments affecting real-property title or interests; Assessment & Taxation records are not a substitute for the recorded document.

Official sources reviewed for this page

Independent property-record guide: CountyAuditors.org is not Clackamas County, the Assessment & Taxation Department, County Clerk, Property Value Appeals Board or Oregon Department of Revenue. Assessment records are useful for property and tax research but do not replace a deed, title examination, professional appraisal, boundary survey, official tax payoff or legal advice. Verify a live balance, appeal deadline, exemption, payment fee or ownership-dependent decision with the responsible public office before acting.
Ohio Auditor Tools · Tax Year 2026

10 Ohio Property Tax Calculators & Auditor Tools

Built specifically for Ohio's 35% assessment ratio, current DTE forms, and 2026 Homestead, Owner-Occupancy, CAUV, Conveyance Fee, and Board of Revision rules. Every number reflects verified Ohio Department of Taxation amounts.

Homestead: $29,000 Enhanced Vet: $58,000 OAGI limit: $41,000 Assessment: 35% of market BOR filing: Free · DTE 1

Annual Tax Bill Estimator

OHIO

Applies Ohio's 35% assessment ratio plus your county's effective millage tier — the actual math your auditor uses.

Pick a county tier and enter your market value.

Homestead Reduction Calculator

DTE 105A

2026 Ohio Homestead: $29,000 general or $58,000 enhanced (100% disabled vet, KIA spouse). OAGI under $41,000 required for non-veteran applicants.

Pick your situation and enter your home value.

Owner-Occupancy & Non-Business Credits

DTE 105C

Every Ohio owner-occupied home qualifies for the 2.5% Owner-Occupancy Credit plus the automatic 10% Non-Business Credit. Most owners don't realize these stack.

Enter your annual tax to see both credit amounts.

Conveyance Fee Calculator

ORC 322

When you sell or transfer Ohio property, the auditor collects $1 state + up to $3 county per $1,000, plus $0.50 per parcel. Counties choose their rate.

Enter sale price and pick your county rate.

CAUV Agricultural Savings

DTE 109

Ohio's Current Agricultural Use Value cuts taxable value dramatically for farmland (10+ acres, or smaller with $2,500+ annual gross income).

Enter both market and CAUV values to see savings.

Mill Rate Converter

Ohio tax rates appear three ways on auditor sites: mills, percent, or dollars per $1,000. Convert between them instantly.

Enter a rate to see all three forms.

Parcel Number Cleaner

Ohio's 88 counties each format parcels differently — Franklin uses 010-123456-00, Cuyahoga uses 001-23-456, Hamilton uses 100-0001-0001-00. Auto-detects.

Paste any Ohio county parcel to format it.

35% Ratio Sanity Check

Ohio law sets taxable value at 35% of market value. If yours is significantly higher, you're a strong BOR appeal candidate.

Enter both values to compare against Ohio's 35% target.

BOR Appeal Savings

DTE 1

A successful Board of Revision complaint typically cuts your value 10–20%. Filing is free and stays in effect until the next reappraisal.

Enter your tax bill and reduction estimate.

BOR Deadline Countdown

MAR 31

Ohio's statutory Board of Revision filing deadline is March 31 for the prior tax year. Miss it and you wait until next year — no extensions.

Set your deadline to start the countdown.

Verify with the official Ohio source

These calculators use the verified 2026 Ohio Department of Taxation amounts and statutory rules. For your exact bill, exemption status, and county-specific deadlines, always confirm with your county auditor and the Ohio Revised Code:

Ohio Dept. of Taxation — Real Property DTE Forms (105A, 105C, 1, 109) ORC 5715 — Board of Revision ORC 5713 — Taxable Real Property ORC 322.02 — Conveyance Fee ORC 319.54(F)(3) — State Fee ORC 5713.30 — CAUV tax.ohio.gov — Main Portal

Estimates use Ohio's 35% statutory assessment ratio and effective tax rate tiers averaged across major Ohio counties. Your actual bill depends on local school levies, voted millage, inside vs. outside millage splits, House Bill 920 reduction factors (HB 920), and special assessments. The 2026 Homestead general amount ($29,000) and enhanced amount ($58,000) reflect HB 187 inflation indexing — your county auditor's office may show slightly different transitional figures. Nothing here is legal or tax advice. CountyAuditors.org is an independent informational directory, not affiliated with any county government.

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