Property Tax Assessment & Appeal
Property Tax Assessment & Appeal Appraisals
Independent residential property valuations for homeowners reviewing or challenging a county property tax assessment in King, Snohomish, and Pierce Counties.
Independent Market Value Evidence for Property Assessment Appeals — a property-specific market value analysis you may submit as supporting evidence. It does not guarantee a successful appeal.
- Washington State-Certified Residential Appraiser
- Experience since 2009
- King, Pierce & Snohomish Counties, Washington
Where owners start
Think Your Property's Assessed Value May Be Too High?
A county assessment and an independent appraisal are two different processes. Your county assessor develops assessed values as part of administering property taxation, across a very large number of properties, largely from records and mass-valuation models. An appraisal looks at one property on its own and develops an opinion of market value for a defined assignment and a stated effective date.
Because the two processes work differently and draw on different information, the figures they produce can differ. That difference by itself does not mean the county has made a mistake — and this page will not tell you that it has. What it does mean is that if you believe the assessed value sits above what your property would actually sell for, independent market evidence is the way to find out, and it is the form of evidence a review or appeal is built on.
An appraisal answers one question: what is this property worth as of the relevant date, and what market data supports that conclusion? What you do with the answer is your decision.
Two different processes
County assessment and independent appraisal
Neither is a flawed version of the other. They are built for different purposes.
County assessment
Developed by the county assessor
An assessed value produced as part of the property taxation process, covering all taxable property in the county on an annual cycle. It is developed for tax administration rather than for a single property owner’s question.
Independent residential appraisal
Developed for your property alone
A property-specific opinion of market value developed by a washington state-certified residential appraiser for a defined assignment and a stated effective date, with the comparable sales and reasoning documented in a written report.
Why the figures can differ
- The information available to each process
- The methodology each one applies
- The property's individual characteristics and condition
- The effective dates the two figures address
Effective date
Why the valuation date matters
An assessment matter turns on value as of a particular date, which is often not today.
Do not assume a current-market appraisal fits an assessment matter. An appraisal developed as of today addresses today’s value. If the matter concerns an earlier date, the assignment needs a retrospective effective date, and that has to be established before the work begins rather than afterwards.
Assessment and appeal matters are tied to a specific valuation date. An appraisal developed as of the wrong date may not address the question the county is actually considering, however sound the analysis is otherwise. Where the relevant date is in the past, a retrospective appraisal is developed using the market data that existed at that time rather than current data.
Which date applies is a procedural question set by statute and county practice, not an appraisal judgment, and this practice does not determine it or advise on it. Confirm the applicable valuation date — and any filing requirement that goes with it — with the appropriate county or with your own professional advisor, then provide it with your request. The appraisal is developed as of that date and the date is stated plainly in the report.
Value, not tax
An appeal concerns assessed market value — not the tax amount
This distinction is easy to lose and worth holding onto. An assessment appeal addresses the assessed market value of the property. The tax you ultimately pay is a separate calculation, driven by levy rates and any exemptions or relief programs that apply to you.
What this practice provides is an independent opinion of market value, and nothing beyond it. The right framing is independent valuation evidence for property assessment review and appeal — not a service that lowers a tax bill.
An appraisal does not determine
- Tax levy rates
- Tax exemptions
- Your tax liability
- Eligibility for tax relief or deferral programs
- The decision of a county or board of equalization
Professional independence
We determine value independently
We do not manufacture a lower value simply because the appraisal is being ordered for an appeal. The role here is not to argue against the county on your behalf; it is to develop an impartial, supportable opinion of market value and document the reasoning behind it.
That independence is what makes the report worth submitting. An appraisal written to reach a predetermined figure would carry no weight with anyone reviewing it — and would not conform to the professional standards this practice works under.
When it may help
Situations where an independent appraisal is often useful
None of these means an assessment is incorrect. Each is a reason an owner may want an individual, documented opinion of value.
The assessed value looks out of step with market activity
Recent sales of comparable homes nearby appear inconsistent with the assessed figure.
Condition differs from what public records show
Deferred maintenance, damage or an unfinished area that the record does not reflect.
The property warrants individual analysis
County valuation covers a large number of properties at once; some homes benefit from being looked at on their own.
Recorded characteristics may be inaccurate
Living area, room count, lot detail or outbuildings recorded differently from what is actually there.
The property has unusual characteristics
An atypical lot, a difficult site, a non-conforming layout, or a home that differs materially from its neighbors.
You want independent evidence before deciding
An owner considering a review or appeal wants a documented, third-party opinion of market value to work from.
Be clear on this
What an appraisal does — and does not — do
This distinction matters more here than on any other page. Read both columns.
An appraisal can
- Provide an independent, documented opinion of market value by a state-certified appraiser
- Analyze comparable sales and market conditions relevant to your property
- Take account of your property's specific condition and characteristics
- Address a historical effective date where a retrospective valuation is appropriate
- Serve as market-value evidence you may submit in a review or appeal
An appraisal does not
- Guarantee that an assessed value will be reduced
- Guarantee that a property tax bill will be lower
- Determine whether an appeal will succeed
- Substitute for legal or tax advice from your own professional
- Control or influence a decision made by a county or a board of equalization
Service area
Assessment appraisals across King, Snohomish and Pierce Counties
Each county runs its own assessment process on its own calendar. Coverage stays limited to three counties because comparable selection here is a neighborhood judgment.
King County
Seattle, Bellevue, Kirkland, Redmond, Renton, Kent and surrounding communities.
King County appraisalsPierce County
Tacoma, Puyallup, Lakewood, University Place, Gig Harbor, Sumner and surrounding communities.
Pierce County appraisalsSnohomish County
Everett, Lynnwood, Edmonds, Marysville, Mukilteo, Mill Creek and surrounding communities.
Snohomish County appraisalsOfficial Property Assessment Appeal Resources
Property assessment appeals are subject to filing deadlines. Confirm your specific deadline directly with the appropriate county Board of Equalization. The external government pages below are the authoritative source for each county’s requirements and should be reviewed directly.
- Appealing a valuation — King County Assessor (opens in a new tab)
Appeals are heard by the King County Board of Appeals and Equalization, which the county describes as an independent agency not affiliated with the assessor.
- Board of Equalization — Snohomish County (opens in a new tab)
The Board of Equalization hears appeals of assessor determinations and publishes the current filing requirements for the assessment year.
- Residential property appeals — Pierce County Assessor-Treasurer (opens in a new tab)
Pierce County's guidance lists independent appraisals among the forms of evidence its Board of Equalization considers, and sets out the standard of proof required.
Northwest Express Appraisals is an independent appraisal practice. It is not affiliated with, endorsed by, or acting on behalf of any county assessor, board of equalization or other government body, and these links are provided as public resources only.
What to expect
How an assessment assignment proceeds
The valuation date and intended use are reviewed before an assignment is accepted, because an assessment matter turns on both.
Tell us about the property and the assessment
The address, the county, the assessed value you are questioning, and the relevant valuation date if you know it. Submitting a request commits you to nothing.
Assignment review
The valuation date and intended use are reviewed before an assignment is accepted, along with the property information, the fee and scheduling. Not every enquiry results in an assignment, and if an appraisal is not the right step you will be told so.
Property and market analysis
The property is inspected where appropriate, and comparable sales and market conditions are analyzed as of the effective date the assignment specifies.
Completed appraisal report
A written report stating the opinion of value, the effective date, the scope of work, the comparable data relied on and the reasoning — in a form you may submit as evidence.
Timing
Contact us as early as you can
Property assessment appeals are subject to filing deadlines. Confirm your specific deadline directly with the appropriate county Board of Equalization. If you are considering an appraisal, contact us as early as possible and independently confirm applicable filing requirements with the appropriate county.
Request a Property Tax AppraisalAn honest question
Is an appraisal worth considering?
Not every disagreement with an assessed value justifies the cost of a full appraisal. It is worth saying that plainly.
An appraisal is a professional engagement with a real fee attached. If the difference in question is small, or the assessed value looks broadly consistent with what the property would sell for, an appraisal may not be a sensible expense. It is usually worth discussing when one or more of the following applies:
- There appears to be a meaningful difference between the assessed value and what the property would sell for
- The property has unusual characteristics that a mass-valuation process handles poorly
- The public record appears inaccurate as to living area, room count or site detail
- Condition issues exist that the record does not reflect
- Comparable sales you have seen suggest a different value
- You want independent, documented evidence before deciding whether to proceed
None of these predicts the outcome of an appeal. They are simply the circumstances in which independent market evidence tends to be useful enough to be worth obtaining. If it is not the right step for your situation, you will be told so.
Groundwork
Before ordering an appraisal
A few things are worth establishing with your county first. They determine whether an appraisal is appropriate at all, and as of which date.
Once you have been through these, get in touch and we can discuss whether an appraisal is appropriate for your situation.
Discuss Your PropertyReview your valuation notice
The notice from your county assessor is the starting point for everything below.
Confirm the assessment year
Identify which assessment year you are questioning, as shown on the notice.
Confirm the valuation date
Establish the effective date the matter concerns. It is frequently not today's date.
Confirm the filing deadline
Check the deadline directly with the appropriate county board of equalization.
Review the county's appeal requirements
Each county publishes what it expects an appeal to contain and how evidence is submitted.
Gather property condition information
Note anything about condition, layout or site that the public record may not capture.
Before you request
Information that helps us get started
None of this needs to be complete, and nothing here is required to make contact. Anything you already know shortens the back-and-forth.
Property address
Street address, city and ZIP of the property.
County
King, Snohomish or Pierce.
Parcel number
The parcel or tax account number, which appears on your valuation notice.
Current assessed value
The figure you are questioning, if you have it to hand.
Assessment year
The assessment year the notice relates to.
Relevant valuation date
The effective date the review or appeal concerns, if you know it.
Date of the notice
When the valuation notice was issued. A copy can be uploaded with the request.
Your own opinion of value
What you believe the property is worth, and why. It informs the conversation without influencing the analysis.
Filing deadline, if known
Anything you have already confirmed with the county, so scheduling can account for it.
Whether an appeal is already filed
If you have already filed, say so — it affects timing and what is useful.
Property condition and characteristics
Anything about the condition, layout or site you believe the record does not capture.
Common questions
Property tax appraisal questions
General information only. Questions about your own assessment, filing requirements or tax position should go to the county or your own advisor.
Related appraisal services
Divorce Appraisal
Independent valuation for property division, mediation and related legal matters.
View pageEstate & Date-of-Death
Current or retrospective valuation for estate, probate and inheritance needs.
View pageRetrospective Appraisal
Residential property valuation as of a prior effective date.
View pageConsidering a Property Assessment Appeal?
Tell us about the property, assessed value, county, assessment year, and relevant valuation date. We'll review the assignment and determine whether an independent residential appraisal may be appropriate.
Washington State-Certified Residential Appraiser · Serving King, Pierce & Snohomish Counties