Last checked Oct 16, 2026
Wolff & Son Construction (Spokane/Colbert area, Washington, US) — best-match operating entity; name remains ambiguousWolff & Son Construction (Spokane/Colbert area, Washington, US) — best-match operating entity; name remains ambiguous's private-equity ownership status is unclear.
Ownership & Acquisition History
Despite escalation, no official registry evidence could be retrieved to confirm entity-chain ownership, and no reliable sources indicate private equity control of the Spokane/Colbert, WA “Wolff & Son Construction” entity.
Notes
- Company-name ambiguity persists: “Wolff & Son” refers to multiple unrelated businesses; this pass continues to treat “Wolff & Son Construction” in the Spokane/Colbert, WA area as the best match based on available public references.
- Founding support: an obituary indicates that in 1990 Dean Wolff partnered with his father and founded Wolff & Son Construction.
- Official registry escalation attempted: Washington Secretary of State directs users to the Corporations & Charities Filing System (CCFS) to search by business name or UBI and view filing history; however, the CCFS entity detail page for UBI 601559050 could not be accessed through this tool (dynamic site access limitation), preventing verification of officers/registered agent/status from the primary registry record.
- Washington Department of Revenue business-lookup resources were identified (including the Business Lookup dataset metadata and the DOR lookup entrypoint), but the lookup interface/API could not be accessed through this tool to retrieve owner/officer fields for UBI 601559050.
- No private equity indications found in the gathered materials (no acquisition announcements, sponsor portfolio listings, SEC filings, or identifiable parent platform).
- Secondary directory data continues to suggest a Washington entity named “WOLFF & SON CONSTRUCTION, INC.” with UBI 601559050 and an inactive status; treated as non-authoritative without SOS corroboration.
- Company-name ambiguity: ‘Wolff & Son’ can refer to multiple unrelated businesses across industries/regions; this assessment is based on the most well-documented current-era match found in sources (Wolff & Son Construction in the Spokane/Colbert, WA area).
- Founding support: an obituary for Dean Wolff states that in 1990 he partnered with his father and founded Wolff & Son Construction.
- No PE-ownership indications: searches for acquisitions/portfolio listings and ownership disclosures for the Spokane-area Wolff & Son Construction did not surface any private equity sponsor or PE-owned parent/platform.
- Possible inactivity: a business-directory entry lists ‘WOLFF & SON CONSTRUCTION, INC.’ (UBI 601559050) as inactive and incorporated in 1994; this is not an official Secretary of State page, so treated as secondary evidence.
Sources
- Dean Wolff Obituary (Spokesman-Review via Legacy.com)
Legacy.com / The Spokesman-Review - Founding support: states that in 1990 Dean Wolff partnered with his father and founded Wolff & Son Construction.
- Dean M. Wolff Obituary | 1966 - 2011 | Spokane, WA
Tribute Archive - Founding support (corroboration): indicates that in 1990 he partnered with his father and founded Wolff & Son Construction.
- Corporation Search (CCFS) — Washington Secretary of State
Washington Secretary of State - Official registry entrypoint for searching by business name or UBI (primary state registry system), though entity details could not be retrieved through this tool.
- Corporations & Charities Filing System Tools & Resources (Public record navigation)
Washington Secretary of State - Describes how to use CCFS to verify entity status and view filing history/documents (used to guide the attempted escalation).
- Business Lookup dataset metadata
data.gov (data.wa.gov / State of Washington) - Confirms Washington DOR provides a Business Lookup that supports searching by business name and UBI and includes owners/officers fields (lookup retrieval failed due to access limits).
- Small Business Guidance (WA) — where to search for information on a business or corporation
Washington State (business.wa.gov / ORIA) - Points to the DOR business license/tax account lookup endpoint and the SOS corporation/entity verification resources.
- Spokane County Project Activity Report (example archive record)
Spokane County, Washington (Archive) - Operational tie: shows contractor name “MORRIS D WOLFF & SON” associated with Spokane/Colbert-area activity (identity-context only; not ownership).
- Washington WOLFF Companies | Washington Companies Directory (secondary)
WashingtonCompanySearch.com - Secondary/non-official: indicates “WOLFF & SON CONSTRUCTION, INC.” (UBI 601559050) incorporated 1994-07-15 and listed as inactive.
- https://ccfs.sos.wa.gov/?ubi=328044835
Web search - Consulted by the research agent
- https://www.sos.wa.gov/find-record
Web search - Consulted by the research agent
- https://www.homeyou.com/wolff-son-construction-spokane-wa
Web search - Consulted by the research agent
- https://www.allsecretary.com/Washington_Company_Search_Secretary_of_State/
Web search - Consulted by the research agent
Ownership FAQ
Is Wolff & Son Construction (Spokane/Colbert area, Washington, US) — best-match operating entity; name remains ambiguous owned by private equity?
Wolff & Son Construction (Spokane/Colbert area, Washington, US) — best-match operating entity; name remains ambiguous's private-equity ownership status is unclear based on the available sources.
Who owns Wolff & Son Construction (Spokane/Colbert area, Washington, US) — best-match operating entity; name remains ambiguous?
Unconfirmed via official registry record due to access limitations; appears to have been a privately held Washington construction business (potentially inactive/closed). No evidence found of a controlling private equity owner.
When was Wolff & Son Construction (Spokane/Colbert area, Washington, US) — best-match operating entity; name remains ambiguous last checked?
This page was last checked on Oct 16, 2026.