Ukiah Main Post Office

Ukiah, Mendocino County, California Listed Ref. 12000266 Building

Also known as: United States Post Office, Ukiah, California

Ukiah Main Post Office, Ukiah, California
Photo: Ian Poellet (User:Werewombat), CC BY-SA 3.0, via Wikimedia Commons
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Why it's listed

Ukiah's main post office, at 224 North Oak Street, is a one-story reinforced concrete building with a full basement, finished in the Streamlined Moderne style. It opened in January 1937 and gave the town's post office its first permanent home after 79 years and about two dozen rented locations. Funded through New Deal public building appropriations, it was the largest federal public works project in inland Mendocino County during the 1930s. Distinctive features include steel sash windows, granite entry steps, a bronze eagle over the door, and a walnut-stained Alderwood vestibule. The thick walls, basement shooting range, and inspectors' mezzanine gallery reflect its security-minded design. Inside the lobby, Ben Cunningham's egg tempera mural, Resources of the Soil, was added in 1938 and depicts timber, vineyard, orchard and rangeland work. Changes since 1937 include a wheelchair ramp, replaced front doors and a modern service counter. The building remains in postal use and is valued as a well-preserved example of New Deal architecture and art.

Significance in brief: It is argued to be significant under Criterion A as the largest single federal public works project for inland Mendocino County in the 1930s and a symbol of New Deal relief spending. Under Criterion C, it is a good example of Streamlined Moderne (PWA/WPA Moderne) architecture, and it holds a Section of Fine Arts mural by Ben Cunningham.

Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 12000266, listed May 9, 2012. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).

Key facts

Address224 N. Oak St., Ukiah
CountyMendocino County
ListedMay 9, 2012
Reference number12000266
Resource typeBuilding
Period of significance1935 - 1938
Architect / builderLouis A. Simon: Supervising Architect; Neil A. Melnick: Supervising Engineer; Robert McCarthy: General Contractor
Architectural styleModern Movement: Moderne, Streamlined Moderne, PWA / WPA Moderne
Criteria
  • A — associated with events that made a significant contribution to history
  • C — distinctive architecture, design or construction
Areas of significancePolitics/Government, Economics, Architecture, Art
Level of significanceLocal
Status (as stated in the nomination)In good condition and still in use as Ukiah's main post office, with only slight alterations since 1937.
Acreage0.5
Coordinates39.15225, -123.21119 (NPS GIS)

What listing means for this property

For a publicly owned building or structure, listing mainly matters when federal funds, permits or licences are involved: projects then go through Section 106 review so effects on the property are considered. Listing also strengthens applications for preservation grants and, for leased income-producing uses, can enable the federal rehabilitation tax credit.

General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.

Sources and further reading

Last updated October 2026. Found an error? See the editorial policy for how to report it.