Casa Del Mar Homes for Sale

Casa Del Mar is a residential community in Key Biscayne, Florida.

Pure Equity Realty covers Casa Del Mar and the Key Biscayne area. We list for 1%, which includes photography, MLS syndication, and negotiation support. Buyers pay nothing for representation. For current market data, see Florida Realtors' market statistics.

Our MLS feed shows 6 Casa Del Mar Key Biscayne homes for sale as of October 2026. The median asking price is $3.03M. Asking prices run from $1.5M to $3.75M.

That is 14% above the Key Biscayne median of $2.65M. On a per-foot basis, homes here ask about $1,241 per square foot, compared with $1,161 across Key Biscayne. So the median price buys roughly 2,450 square feet of living area.

Listings here have averaged 68 days on the market. That is faster than the Key Biscayne average of 130 days. As a result, buyers here should be ready to write an offer soon after a showing.

Homes listed in Casa Del Mar date from 1971, so they are about 55 years old.

All of these homes predate Florida's 2002 statewide building code. So roof age, window protection and the wind mitigation report matter a great deal for insurance.

In addition, most Florida insurers ask for a four-point inspection on homes 30 years or older. It covers the roof, electrical, plumbing and HVAC. Updated systems usually make coverage easier to place.

Rentals in Casa Del Mar have a median asking rent of $8,700 per month, across 9 active rental listings. That is close to the Key Biscayne median of $8,500.

For investors, those medians imply a gross yield near 3.4% a year. However, that figure comes before HOA dues, property tax, insurance and vacancy. Also check the association documents first, because many Florida HOAs cap leases or set minimum terms.

You can browse current Key Biscayne rentals or ask us for a rent estimate on a specific Casa Del Mar home.

Here is what the median Casa Del Mar price means in Florida closing terms. At $3.03M, a 20% down payment comes to about $607,000, leaving a loan near $2.43M.

Florida then taxes that loan twice. First, documentary stamp tax on the note runs 35 cents per $100, or about $8,491. Next, the intangible tax of 0.2% adds about $4,852. Buyers normally pay both at closing.

On the seller side, Miami-Dade charges deed stamps of 60 cents per $100 on a single-family home, about $18,195 at this price. Condos and other property types pay a higher rate.

Finally, owner-occupants should file for the Florida homestead exemption by March 1. It removes up to $50,000 of assessed value. After that, Save Our Homes caps yearly assessment increases at 3% or inflation, whichever is lower. To see what these numbers mean for your budget, get pre-approved before you tour.

Recent Casa Del Mar listings show assignments to Key Biscayne K-8 (elementary), Ponce De Leon (middle) and Coral Gables (high). However, boundaries can change each year, so confirm the assignment for a specific address with Miami-Dade County Public Schools.