Condominium 1 (The Sea Ranch) is a Modernist ranch in Sea Ranch, Sonoma County, California. Built in 1965, it was designed by Moore Lyndon Turnbull Whitaker (MLTW), and is listed on the U.S. National Register of Historic Places.
Location: The Sea Ranch, Sea Ranch, Sonoma County, California, United States
Verified facts
- Located in The Sea Ranch, Sea Ranch
confidence 80/100 · 4 independent sources · SRC-2312, SRC-2313, SRC-8075, SRC-8076 - Designed by Moore Lyndon Turnbull Whitaker (MLTW)
confidence 75/100 · 4 independent sources · SRC-2314, SRC-2313, SRC-8077, SRC-8078 - Architectural style: Modernist
confidence 75/100 · 4 independent sources · SRC-2314, SRC-2315, SRC-8079, SRC-8076 - Historic designation: National Register of Historic Places
confidence 80/100 · 4 independent sources · SRC-2312, SRC-2313, SRC-8075, SRC-8076 - Built in 1965
confidence 85/100 · 3 independent sources · SRC-13482, SRC-13517, SRC-13518, SRC-13584 - Designed by Charles W. Moore, William Turnbull (MLTW)
confidence 85/100 · 3 independent sources · SRC-13482, SRC-13517, SRC-13518, SRC-2314
Evidence & sources
- SRC-13482 — https://npgallery.nps.gov/pdfhost/docs/NRHP/Text/0 (Tier 1, reference; retrieved July 2026)
- SRC-13517 — https://npgallery.nps.gov/pdfhost/docs/NRHP/Text/05000731.pdf (Tier 1, reference; retrieved July 2026)
- SRC-13518 — https://en.wikipedia.org/wiki/Condominium_1 (Tier 1, reference; retrieved July 2026)
- SRC-13584 — Metropolis Magazine — Despite Its Oft-Copied Look, the Sea Ranch Still Provides Rich Architectural a (Tier 2, reference; retrieved July 2026)
- SRC-2312 — National Register of Historic Places Registration Form — Condominium 1 (Tier 1, official_archive; retrieved June 2026)
- SRC-2313 — NoeHill — National Register #05000731: Condominium 1 in The Sea Ranch, California (Tier 3, portal; retrieved June 2026)
- SRC-2314 — Docomomo US — Sea Ranch, Condominium 1 (Tier 2, institutional; retrieved June 2026)
- SRC-2315 — Dwell — The Architectural Legacy of Sea Ranch, a Utopian Community in Northern California (Tier 2, journalism; retrieved June 2026)
- SRC-8075 — CONDOMINIUM 1 — Listed Resources (California Office of Historic Preservation) (Tier 1, official; retrieved June 2026)
- SRC-8076 — Sea Ranch's Historic Condominium One Hits the Market for $1.1 Million (7×7 Bay Area) (Tier 3, news; retrieved June 2026)
- SRC-8077 — Past Progressives: Sea Ranch Condominium Complex (Architect Magazine) (Tier 2, news; retrieved June 2026)
- SRC-8078 — Sea Ranch Condominium 1 (Washington University Building Case Studies) (Tier 2, academic; retrieved June 2026)
- SRC-8079 — The Lasting Impact of Sea Ranch (Alta Journal) (Tier 2, news; 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.
Frequently asked questions
Who designed Condominium 1 (The Sea Ranch)?
Condominium 1 (The Sea Ranch) was designed by Charles W. Moore, William Turnbull (MLTW).
Where is Condominium 1 (The Sea Ranch) located?
Condominium 1 (The Sea Ranch) is located in Sea Ranch, Sonoma County, California.