$17,515,400
- 6 Beds
- 7 Baths
- 8,000 sqft (on 0.47 acres)
840 Harbor Dr, Key Biscayne, FL 33149
Est. Refi. Payment $115,499/mo*
Refinance Your HomeCurrently Off Market - Sold Sep 2, 2015 for $9,500,000
Home Value
Trulia Estimate
$17.5MSince last month
Increased$205K (+1.2%)Since last year
Increased$2M (+11.9%)Since last sale
Increased$8M (+84.3%)Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.
Trulia Estimate
The of this home's value increased by +75% in the last 10 years
| Month | Estimated value |
|---|---|
2026 | |
| August 2026 | $17.51M |
| July 2026 | $17.3M |
| June 2026 | $17.4M |
| May 2026 | $16.41M |
| April 2026 | $16.07M |
| March 2026 | $15.8M |
| February 2026 | $15.79M |
| January 2026 | $15.46M |
2025 | |
2024 | |
2023 | |
2022 | |
2021 | |
2020 | |
2019 | |
2018 | |
2017 | |
2016 | |
Comparable sales
These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.47 | Single-Family Home | $21,000,000 | 02/26/26 | 6 | 7 | 8,031 | |
0.25 | Single-Family Home | $6,500,000 | 03/31/26 | 7 | 7.5 | 5,528 | |
0.16 | Single-Family Home | $14,000,000 | 08/03/26 | 4 | 4.5 | 4,290 | |
0.33 | Single-Family Home | $4,950,000 | 04/20/26 | 6 | 6 | 3,888 | |
0.37 | Single-Family Home | $5,690,000 | 06/15/26 | 6 | 5 | 3,584 | |
0.38 | Single-Family Home | $4,200,000 | 03/27/26 | 6 | 5.5 | 3,436 | |
0.85 | Single-Family Home | $17,500,000 | 07/08/26 | 7 | 7.5 | 6,240 | |
0.49 | Single-Family Home | $23,500,000 | 07/06/26 | 3 | 5 | 10,926 | |
0.28 | Single-Family Home | $5,200,000 | 08/11/26 | 3 | 3.5 | 3,343 | |
0.43 | Single-Family Home | $3,700,000 | 01/27/26 | 5 | 5 | 3,962 |
Nearby home prices
Get a sense of expected prices in the area by checking the value of nearby homes.Address | Distance | Price | Bed | Bath | Sqft | Status |
|---|---|---|---|---|---|---|
0.08 | $12,485,000 | 6 | 7 | 6,405 | For Sale | |
0.09 | $3,437,500 | 3 | 2 | 1,915 | Off Market | |
0.13 | $4,381,900 | 4 | 5 | 3,651 | Off Market | |
0.17 | $3,073,800 | 5 | 4 | 2,867 | Off Market | |
0.17 | $4,444,800 | 5 | 5.5 | 3,534 | Off Market | |
0.21 | $19,500,000 | 6 | 9 | 7,742 | For Sale | |
0.16 | $14,000,000 | 4 | 4.5 | 4,290 | Recently Sold | |
0.22 | $2,850,000 | - | - | - | Recently Sold | |
0.17 | $5,685,600 | 6 | 5 | 3,245 | Off Market | |
0.18 | $18,452,100 | 5 | 6.5 | 5,226 | Off Market | |
0.23 | $12,325,900 | 6 | 6 | 5,191 | Off Market | |
0.18 | $19,900,000 | 5 | 4 | 3,085 | For Sale |
Local Information
-- mins to
Home Highlights
Property Type
Single-Family Home
Year Built
2014
Lot Size
0.47 acres
Living Area
8,000 sqft
Price/Sqft
$2,189
Parking
Garage
About this House
Absolutely"Stunning"...On exclusive Harbor Drive...this magnificent completely redone modern waterfront home is just perfect.An incredible Corner lot with over 20,000SqFt of land...Top of the line finishes and exquisite taste...This home features Incredible living room,dining room,5 very spacious bedrooms,plus 1 staff quarter's(6 bedrooms),6 full baths,2 half baths,office/library,2 family rooms,garage and so much more.Enjoy the wonderful private and protected dock... a boaters dream...Must See!
840 Harbor Dr, Key Biscayne, FL 33149 is a 6 bedroom, 8 bathroom, 8,000 sqft single-family home built in 2014. It last sold for $9,500,000 on Sep 2, 2015. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $17,515,400, with a rent estimate of $77,159/month.
Home Details for 840 Harbor Dr
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Heating & Cooling Heating: ElectricHeating Fuel: Electric |
Levels, Entrance, & Accessibility Stories: 2Floors: Other |
Interior Details Types of Rooms: Walk In Closet, Family Room, Pantry |
Appliances & Utilities DishwasherDryerMicrowaveRefrigeratorWasher |
Security Security System |
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Exterior Home Features Roof: OtherExterior: OtherPatioSprinkler System |
Pool Pool |
Parking & Garage GarageParking Spaces: 4Parking: Garage Attached |
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Year Built Year Built: 2014Year Updated: 1999 |
Property Type / Style Property Type: Single Family HomeArchitecture: Other |
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Units in Building: 1 |
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Lot Area: 0.47 acres |
Price and Tax history
| Date | Event | Price |
|---|---|---|
Sep 2, 2015 Source: N/A | Sold | $9,500,000 |
Aug 23, 2014 Source: Agent Provided | Listed For Sale | $10,900,000 |
Nov 27, 2013 Source: N/A | Sold | $5,650,000 |
Oct 17, 2013 Source: Agent Provided | Pending | $6,700,000 |
Jul 24, 2013 Source: Agent Provided | PriceChange | $6,700,000 Price increased by 3% |
Apr 7, 2013 Source: Agent Provided | Pending | $6,490,000 |
Dec 1, 2012 Source: Agent Provided | PriceChange | $6,490,000 Price decreased by 5% |
Jun 6, 2012 Source: Agent Provided | PriceChange | $6,850,000 Price decreased by 5% |
May 4, 2012 Source: Agent Provided | PriceChange | $7,200,000 Price decreased by 5% |
Mar 15, 2012 Source: Agent Provided | PriceChange | $7,590,000 Price decreased by 5% |
Feb 18, 2012 Source: Agent Provided | Listed For Sale | $7,950,000 |
Oct 27, 1999 Source: N/A | Sold | $2,700,000 |
Nov 14, 1997 Source: N/A | Sold | $755,000 |
Sep 8, 1997 Source: N/A | Sold | $755,000 |
| Year | Property tax | Tax assessment |
|---|---|---|
| 2025 | $112,348 | $11,396,047 |
Home facts updated by county records
Market trends in Key Biscayne
Last updated July 2026
Avg. sale price
$1.56M
$26.67KMoM
Sale-to-List Price
94.6%
Price per sq ft
$981
$37MoM
Available listings
144
15MoM
Around this home
What Locals Say about Key Biscayne
At least 116 Trulia users voted on each feature.
94 % Say it's walkable to grocery stores
94 % Say kids play outside
90 % Say it's dog friendly
90 % Say it's walkable to restaurants
86 % Say people would walk alone at night
86 % Say there are sidewalks
79 % Say it's quiet
79 % Say there's holiday spirit
76 % Say they plan to stay for at least 5 years
68 % Say parking is easy
67 % Say streets are well-lit
60 % Say there are community events
58 % Say neighbors are friendly
54 % Say yards are well-kept
52 % Say there's wildlife
50 % Say car is needed
Sourced by Trulia users. Learn more about our methodology.
LGBTQ Local Legal Protections
LGBTQ Local Legal Protections
Frequently asked questions about 840 Harbor Dr
- What is 840 Harbor Dr estimated to be worth?Trulia's estimated value for 840 Harbor Dr in Key Biscayne, FL is $17,515,400.
- What is the price history for 840 Harbor Dr?840 Harbor Dr in Key Biscayne, FL last sold for $9,500,000 in September 2015.
- Is Key Biscayne a buyer's or seller's market?Key Biscayne is currently a buyer's market, based on recent for-sale activity.
- What's the median sale price in Key Biscayne?The median sale price in Key Biscayne is $1.56M. That is down $26.67K from the prior month.
- Does 840 Harbor Dr have a pool?Yes, 840 Harbor Dr in Key Biscayne, FL has a pool.
- Does 840 Harbor Dr have laundry facilities?Yes, 840 Harbor Dr in Key Biscayne, FL has in-unit laundry.