Uploaded: Tue, Jul 13, 2021, 5:41 pm 2 Time to read: about 3 minutes The Charleston Slough north of Mountain View's North Bayshore area, where the city is expecting a surge of new development. Photo by Michelle Le. The city of Mountain View is planning for a surge in new offices and homes in North Bayshore, placing dense new development just a short jaunt away from the baylands. But new sea level rise estimates show that future development could very well end up underwater without flood protection, and it's unclear who is going to pick up the costly bill. Earlier this year, Google announced its proposal to build 7,000 homes in North Bayshore alongside 3 million square feet of offices less than a mile from the bay. It's the largest single development proposal in the city's history, complicated by the fact that it's all in a low-lying area subject to flooding due to stormwater runoff and high tides. Protecting properties in North Bayshore was previously estimated to cost $45.7 million, but city officials revealed last month that costs have ballooned to a whopping $121.8 million.