Encinitas' $20M Beach Mansions Are Losing Their Cliffs — And Owners Are Running Out of Options

On Neptune Avenue in Leucadia, at the north end of Encinitas, the houses look modest from the street — and then the floor drops four levels to a wall of glass and the open Pacific. One of them set a city record at $11.1 million in 2016; a newer one up the street was listed near $25 million. But every one of those prices rests on a single assumption: that the sandstone cliff underneath will always be there. Right now, it isn't cooperating. This September, after Hurricane Marie, a slab of bluff broke loose at Grandview Beach — almost exactly where a 2019 collapse killed three women from one family. This is the full story of Encinitas: the glass temple that slid off this same cliff in 1942, the 1977 date in the Coastal Act that now decides which homes can be defended, the $417 million federal plan to keep buying back sand that is designed to wash away, the Barbara Lynch case that went to the California Supreme Court — and lost, the seawalls that come with an expiration date, and why, under California law, a wall to hold back the ocean here is not a right but a temporary permission. When you put $20 million homes on a crumbling cliff, the ocean does not read the listing. 🌊 Should the state let these owners build whatever walls it takes to save their homes — even if the public beach disappears? Or did they get exactly what they paid for? Let me know in the comments. ⚠️ Note: this is a documentary about coastal geology, law and public records; real deaths are treated with respect and contested matters are presented as disputes. Subscribe for more on what happens when very expensive real estate meets the sea. ⏱ CHAPTERS 00:00 The hidden mansions of Neptune Avenue 00:27 $20 million, and a record sale 01:02 What they're really sitting on 02:51 The cliff stops cooperating 03:45 A seawall is not a right 05:09 1942: the glass temple that slid away 06:22 1977: the date that decides everything 06:56 How a beach really works 07:49 A cliff eaten from below and above 09:18 Seawalls, and the problem they create 10:10 1996 and 2000: the first deaths 10:42 The walls wear out 11:34 The $417 million sand bill 13:27 The law: Section 30235 14:00 Barbara Lynch vs. the Commission 15:39 The pink cottage and the $25M house 18:10 August 2019: three deaths 19:30 Hurricane Marie and El Niño 20:15 What happens now?