Commanding Officer's Quarters, Watertown Arsenal
Also known as: Building 111
Why it's listed
Building 111 is the commanding officer's residence at the former Watertown Arsenal, now the Army Materials and Mechanics Research Center, in Watertown, Massachusetts. Completed in 1865 in the Bracketed Style, it is a three-story brick house with a hipped roof, a wooden balustrade, paneled brick chimneys, and a veranda with cast-iron Corinthian columns. Inside, a central hall, an arched stairway, marble fireplaces, ceiling medallions and polychromatic hardwood floors survive largely unaltered. Its plans passed through many revisions under Maj. Thomas J. Rodman, who never lived there; the construction controversy contributed to his removal from command. Forty-nine commanders have since occupied it, among them officers who advanced gun casting, scientific management and gun-tube strengthening. The house is set above the Charles River, and Olmsted Brothers landscaping from 1919 opened its views toward the water. The nomination argues that it is the most ornate building on the arsenal grounds and a distinctive Victorian residence.
Significance in brief: The form cites its architecture as a lavishly detailed Bracketed Style house, unlike the simple military buildings nearby, and its largely unaltered state. It also notes its association with 49 arsenal commanders, several of whom advanced gun manufacturing and management methods. The 1919 Olmsted Brothers landscaping of the grounds adds to its value.
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 76000279, listed October 7, 1976. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | 443 Arsenal St., Watertown |
|---|---|
| County | Middlesex County |
| Listed | October 7, 1976 |
| Reference number | 76000279 |
| Resource type | Building |
| Period of significance | 1865 |
| Architect / builder | Plans by the US Ordnance Department and Maj. Thomas J. Rodman (with draughtsman George W. Horn); master mason Thomas L. French |
| Architectural style | Bracketed Style |
| Areas of significance | Military, Architecture |
| Level of significance | Local |
| Status (as stated in the nomination) | Condition listed as excellent and unaltered; occupied and used as the commanding officer's residence under government ownership. |
| Acreage | 0.5 |
| Within district | Watertown Arsenal Historic District |
| Coordinates | 42.36044, -71.16336 (NPS GIS) |
What listing means for this property
National Register listing is honorary: it recognises significance and does not restrict what a private owner may do without federal money or permits. It unlocks the 20% federal rehabilitation tax credit for income-producing buildings, state credits in many states, and Section 106 review when federal agencies are involved. See what listing means in practice.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 76000279.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q5152223
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.