Hammond Castle

Hammond Castle is a Medieval castle in Gloucester, Massachusetts, and a filming location for FETCH! with Ruff Ruffman (2006) and Love on the Spectrum U.S. (2024). Built in 1929, it was designed by Allen & Collens, and is listed on the U.S. National Register of Historic Places. It is owned by John Hays Hammond Jr..

Location: 80 Hesperus Avenue, Gloucester, Massachusetts, United States

Verified facts

• Located in Magnolia, Gloucester, Massachusetts
  confidence 80/100 · 6 independent sources · SRC-0332, SRC-0333, SRC-0476, SRC-0620, SRC-3864, SRC-3865
• Designed by Allen & Collens
  confidence 70/100 · 3 independent sources · SRC-0334, SRC-0335, SRC-2999
• Built in 1929
  confidence 70/100 · 3 independent sources · SRC-0334, SRC-0336, SRC-0477
• Architectural style: Medieval
  confidence 95/100 · 5 independent sources · SRC-0335, SRC-0336, SRC-0333, SRC-0332, SRC-0621
• Historic designation: National Register of Historic Places (listed May 8, 1973; ref. #73000298)
  confidence 75/100 · 3 independent sources · SRC-0337, SRC-0338, SRC-0478
• Owned by John Hays Hammond Jr.
  confidence 95/100 · 6 independent sources · SRC-0332, SRC-0333, SRC-2999, SRC-3864, SRC-0335, SRC-6057
• Appeared in FETCH! with Ruff Ruffman (tv, 2006)
  confidence 70/100 · 3 independent sources · SRC-9360, SRC-9361, SRC-9511
• Appeared in Love on the Spectrum U.S. (tv, 2024)
  confidence 70/100 · 3 independent sources · SRC-9362, SRC-9363, SRC-9512

Evidence & sources

• SRC-0332 — Hammond Castle Museum (official) (Tier 1, owner_statement; retrieved June 2026)
• SRC-0333 — Wikipedia (Tier 3, encyclopedia; retrieved June 2026)
• SRC-0334 — Boston Magazine (Tier 2, journalism; retrieved June 2026)
• SRC-0335 — Harvard Magazine (Tier 2, journalism; retrieved June 2026)
• SRC-0336 — History of Massachusetts Blog (Tier 2, journalism; retrieved June 2026)
• SRC-0337 — National Park Service, National Register of Historic Places (NPGallery) (Tier 1, official_archive; retrieved June 2026)
• SRC-0338 — National Register of Historic Places listings in Gloucester, Massachusetts (Wikipedia) (Tier 3, encyclopedia; retrieved June 2026)
• SRC-0476 — Addison Choate Realty – Why Visit Hammond Castle Museum On Cape Ann? (Tier 3, article; retrieved June 2026)
• SRC-0477 — Atlas Obscura — Hammond Castle Museum (Tier 2, reference_article; retrieved June 2026)
• SRC-0478 — City of Gloucester, MA – Historic Listings and Designations in Gloucester (2024) (Tier 1, official_archive; retrieved June 2026)
• SRC-0620 — Remitly Beyond Borders — Explore Hammond Castle: A Unique Massachusetts Gem (Tier 3, established_blog; retrieved June 2026)
• SRC-0621 — Discover Gloucester — Hammond Castle Museum (Cape Ann Chamber / destination marketing) (Tier 3, tourism_portal; retrieved June 2026)
• SRC-2999 — Fifty Plus Advocate – One of world's best-known castles is found in Gloucester (Tier 2, news_article; retrieved June 2026)
• SRC-3864 — bostonmagazine.com (Tier 3, reference; retrieved June 2026)
• SRC-3865 — britannica.com (Tier 2, journalism; retrieved June 2026)
• SRC-4736 — Visit Massachusetts (state tourism office) (Tier 2, tourism_authority; retrieved June 2026)
• SRC-6057 — The Historic New England Project — The Hammond Castle: A Quirky Inventor's Home on the Gloucester Sea Shore (Tier 3, reference; retrieved June 2026)
• SRC-9360 — harborwalk.gloucester-ma.gov (Tier 2, journalism; retrieved June 2026)
• SRC-9361 — nhpbs.org (Tier 2, journalism; retrieved June 2026)
• SRC-9362 — wokq.com (Tier 2, journalism; retrieved June 2026)
• SRC-9363 — thecinemaholic.com (Tier 2, journalism; retrieved June 2026)
• SRC-9511 — Wikipedia — List of Fetch! with Ruff Ruffman episodes (Tier 2, reference; retrieved June 2026)
• SRC-9512 — NewsBreak — Castle In Massachusetts Featured On New Netflix Show (Tier 2, journalism; retrieved June 2026)

How we verify

Every fact above is independently corroborated by at least two reputable sources and
confidence-scored before publication. Claims that cannot clear that bar are withheld. We show the
street address only for non-residential public landmarks (museums, commercial and civic buildings,
publicly documented filming-location sites); the exact addresses of private residences and any
personal information are structurally barred from publication. Last reviewed June 2026.

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Frequently asked questions

Where was FETCH! with Ruff Ruffman filmed?

Hammond Castle, in Gloucester, Massachusetts, is a real-world filming location used for FETCH! with Ruff Ruffman. This property has also appeared on screen in Love on the Spectrum U.S..

Where was Love on the Spectrum U.S. filmed?

Hammond Castle, in Gloucester, Massachusetts, is a real-world filming location used for Love on the Spectrum U.S.. This property has also appeared on screen in FETCH! with Ruff Ruffman.

Can you visit Hammond Castle?

Yes — Hammond Castle is open to the public. Hours: Open daily 9:00am-3:30pm; last entrance 2:45pm. Admission: Guided and self-guided tours; senior and child (5-12) discounts; ages 4 and under free; MA EBT/WIC holders free daytime admission. Advance online reservations required..

Who designed Hammond Castle?

Hammond Castle was designed by Allen & Collens.

Where is Hammond Castle located?

Hammond Castle is located in Gloucester, Massachusetts.