Sea Side villa: Need advice

\[Reposting this\] Looking at a 1050 sq. ft plot near VGP, Chennai, just 150m from the shore, 400m from the high tide line. Price: ₹9000/sq. ft. Papers are clean, and there’s a group building approval for four plots together. Before I jump in, need some insights: https://preview.redd.it/wms6cern53le1.png?width=391&format=png&auto=webp&s=3e78a873b2fb8d34c71448999f9c7a899a571d3b 1️⃣ Sea-Level Rise & Erosion – OMR gets all the [attention](https://coastal.climatecentral.org/map/13/80.2592/12.9265/?theme=water_level&map_type=water_level_above_mhhw&basemap=roadmap&contiguous=true&elevation_model=best_available&water_level=1.0&water_unit=m), but what about direct beachfront plots? Any long-term risks of erosion or govt restrictions? 2️⃣ Building & Security – What kind of foundation works best this close to the sea? The area isn’t too crowded—good or bad for security? A politician owns a villa two plots away—does that help or hurt? 3️⃣ Water Supply – Is groundwater usable, or should I budget for RO/tankers? 4️⃣ Salt Damage & Maintenance – How do homeowners here fight corrosion and wear from salty air? Any must-use materials or design tweaks? 5️⃣ Regulations & Insurance – Any CRZ restrictions that could affect resale? Is special coastal insurance needed? Would love advice from anyone familiar with beachfront real estate or this area. Anything I should think twice about?