430 Grand Bay, Unit 307Key Biscayne, FL 33149Price: $3,400,000

  • Price: $3,400,000
  • Est. Mortgage of $/month
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Federal 30-year interest rate: 6.66% last updated on Aug 27, 2026
* All Figures are estimates. Check with your bank or proposed mortgage company for actual interest rates.
This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.
  • $3,400,000List Price
  • 3Bedrooms
  • 4Full Bath
  • 2,840Square Feet
Step off your private elevator into your own foyer and feel instantly at home. This updated, light-filled 3BR + maid's quarters / 4BA offers a wonderfully functional layout - open living and dining area, family room, and a partially open kitchen with snack counter, all flowing to a spacious garden terrace with peaceful green views. Three full ensuite bedrooms. The primary suite is bright and spacious with its own private balcony. Impact windows throughout. Move-in ready. Boutique building. Enjoy Grand Bay's five-star amenities: beach service, pool, fitness center, concierge, valet, tennis and padel courts, and more - all steps from the Ritz-Carlton! Island living at its finest.

Property Details of 430 Grand Bay, Unit 307

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$
$
%
Est. Mortgage:
$/month over payments
Federal 30-year interest rate: 6.66% last updated on Aug 27, 2026. * The above figures are estimates provided by Union Street Media using the FRED® API, and are not endorsed or certified by the Federal Reserve Bank of St. Louis. Check with your lender for actual interest rates.
Listed by of BHHS EWM Realty

 "Based on information submitted to Martin County REALTORS® of the Treasure Coast as of September 3, 2026 7:14 PM UTC . All data is deemed reliable but is not guaranteed accurate by the MLS. All information should be independently reviewed and verified for accuracy. IDX information is provided exclusively for consumers’ personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing."

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