How much does a adu new cost in Seattle (98107)?
Adu new projects filed in Seattle (98107) typically run about $192,000, with most between $94,400 and $256,000, based on 61 filings (Seattle public records, DataSF).
These are comparable filed projects in Seattle (98107) — a typical reference range, not a quote. Your project can land anywhere in the spread depending on scope, materials, and access.
Where the money goes
What moves the price
Common questions
What's the typical range for a adu new in Seattle (98107)?
Most adu new projects in Seattle (98107) run $94,400 to $256,000, with a median around $192,000, based on 61 filings of comparable filed work (Seattle public records, DataSF).
How does Seattle (98107) compare to citywide adu new costs?
the 98107 median ($192,000) runs about 16% above the Seattle citywide median ($165,000) for adu new projects.
How recent is this data?
These figures reflect comparable adu new projects filed in Seattle public records (DataSF), compiled as of 2026-06-03. They refresh as new filings are published.
What affects the cost of a adu new?
Scope, materials, finishes, the age and condition of the home, and site access. The spread above ($94,400–$256,000) reflects that range — your project can land anywhere in it.
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