Tacoma does not write its own definitions for dangerous dogs. The City publishes the definitions set out in state law, which means the vocabulary in a Tacoma declaration is the same vocabulary used across Washington.
Knowing what those words mean is useful. Believing they decide a civil claim is where people go wrong.
The two labels
Under RCW 16.08.070, a potentially dangerous dog is one that, when unprovoked, bites a human or a domestic animal on public or private property, or chases or approaches a person on streets, sidewalks or public grounds in a menacing fashion or apparent attitude of attack. The definition also reaches a dog with a known propensity, tendency or disposition to attack unprovoked, to cause injury, or otherwise to threaten the safety of humans or domestic animals.
A dangerous dog is one that inflicts severe injury on a human without provocation on public or private property, kills a domestic animal without provocation while off the owner's property, or was previously found potentially dangerous because of injury inflicted on a human, with notice to the owner, and then again aggressively bites, attacks or endangers the safety of humans.
"Severe injury" is defined narrowly: physical injury resulting in broken bones, or disfiguring lacerations requiring multiple sutures or cosmetic surgery.
Why that severe-injury threshold is not about your damages
This is the single most common misreading, and it can talk people out of claims they should be making.
The severe-injury definition exists to sort dogs into administrative categories. It sets the bar for what a public-safety agency can classify as a dangerous dog. It has no relationship to what an injured person can recover. A puncture wound that heals without sutures, a hand injury that ends someone's ability to do their job, a child's facial scar that does not require cosmetic surgery: none of those necessarily clears the statutory severe-injury bar, and all of them can be serious compensable injuries.
If someone tells you your injury "wasn't severe," find out which definition they are using.
Who regulates which label
State law splits this in a way worth knowing. Potentially dangerous dogs are regulated only by local, municipal and county ordinances, while the state statutes carry the dangerous-dog restraint, registration and confiscation requirements.
The practical consequence is that a potentially dangerous designation, its consequences, and the process for challenging it are creatures of local ordinance. If you need the specific Tacoma procedure, requirements or timelines, those come from the Tacoma Municipal Code rather than from the City's summary page or from this article.
A declaration is not a civil judgment
An animal control authority declaring a dog dangerous has answered one question: whether the dog meets a statutory definition for public-safety purposes. A civil claim answers a different one: whether the owner owes an injured person damages, and how much.
Different decision-makers, different standards, different consequences. They can come out differently on the same dog without either being wrong.
No prior label is required for liability
Under RCW 16.08.040, the owner of a dog that bites a person is liable for damages when the person was in a public place or lawfully on private property, and the statute says this applies regardless of the dog's former viciousness or the owner's knowledge of that viciousness.
That language is doing deliberate work. It removes the prior-history question from the claim entirely. There is no waiting period, no first-bite allowance, and no requirement that anyone ever complained about the dog before.
The reverse is equally true and more often misunderstood. A dog that was never declared, or whose declaration was overturned, is not cleared in a civil case. An agency's decision not to classify a dog says something about the agency's evidence and its standards. It does not answer whether an owner owes you anything.
Where prior history does matter
Not as an element, but as evidence and as context.
A prior declaration file typically documents what the agency found, what containment or restraint it required, and whether the owner complied. Prior complaints at the same address can show a pattern. For non-bite injuries, where the claim runs on negligence rather than the bite statute, what the owner knew about the dog becomes directly relevant in a way it is not under RCW 16.08.040.
Whether any given piece of that file comes into evidence at trial is a separate question under the rules of evidence. Its reliable value is earlier, in investigation and in negotiation, where a contemporaneous agency document is hard to talk past.
Washington's Public Records Act provides the route to request those records. Ask in writing, identify the record specifically, and ask while the file is still current.
What the Local Rules Mean for Your Claim
The labels tell you what the City can do about the dog. They do not tell you what the owner owes you. If you were bitten in Tacoma, the absence of a declaration is not a reason to stop asking the second question.
The office handles Washington dog-bite claims across King, Pierce and Snohomish counties. A review costs nothing, and there is no fee unless the claim resolves in your favor.