| Primary address | 21 Emerald Street, Ronkonkoma |
| Zip code | 11779 |
| County | Suffolk |
| Municipality | Brookhaven |
| Parcel ID | 6235531 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 07/19/2010 |
| Sale price | $310,000 |
| Arm's length | Register |
| Property tax | $9,359 |
| Building sqft | 1,793 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.23 |
| Year built | 1971 |
| Rooms | 6 |
| Bedrooms | 3 |
| Bathrooms | 1 |
| School district | Sachem |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
21 Emerald Street, Ronkonkoma, NY 11779 was built in 1971 and has a total of 1,793 square feet.
What is the assessed value of 21 Emerald Street, Ronkonkoma, NY 11779 and the property tax paid?Assessed at $2,650, the tax amount paid for 21 Emerald Street, Ronkonkoma, NY 11779 is $9,359.
When was 21 Emerald Street, Ronkonkoma, NY 11779 last sold and what was the last sale price?21 Emerald Street, Ronkonkoma, NY 11779 was last sold in 07/19/2010 for $310,000.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 21 Emerald Street, Ronkonkoma, including title documents, transfer conditions, mortgages and liens.
| Purchase date | Purchase price | Buyer name | Seller name |
|---|---|---|---|
| 07/19/2010 | $310,000 | Register | Register |
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 21 Emerald Street, Ronkonkoma, NY 11779. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $9,359 |
| Market value | $500,000 |
| Assessed value | $2,650 |
Here's the assessment & property tax history for 21 Emerald Street, Ronkonkoma, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|---|
| 2024-2025 | $500,000 | $2,650 | 338.342 | $8,966 | -17.92% |
| 2023-2024 | $490,741 | $2,650 | 412.188 | $10,923 | +27.16% |
| 2022-2023 | $427,419 | $2,650 | 324.157 | $8,590 | +3.72% |
| 2021-2022 | $358,108 | $2,650 | 312.54 | $8,282 | +2.63% |
| 2020-2021 | $344,156 | $2,650 | 304.524 | $8,070 | +1.29% |
The complete history of permits filed for 21 Emerald Street, Ronkonkoma, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.
Create a free account to unlock extended information for 21 Emerald Street, Ronkonkoma, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | X (See more on map) |
Access the detailed traffic volume map for 21 Emerald Street, Ronkonkoma to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
| View daily traffic map |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Maimonides Day School | NR | Private | PK, K-3 | 25 | 0.45 |
| Maimonides Day School | NR | Private | PK, K-3 | 25 | 0.45 |
| Cayuga School | 6 | Public | K-5 | 516 | 0.59 |
| St Joseph School | NR | Private | PK, K-8 | 212 | 1.11 |
| St Joseph School | NR | Private | PK, K-8 | 212 | 1.11 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Samoset Middle School | 6 | Public | 6-8 | 892 | 0.74 |
| St Joseph School | NR | Private | PK, K-8 | 212 | 1.11 |
| Cleary School For The Deaf | NR | Private | PK-12 | 79 | 1.20 |
| Lake Grove School | NR | Private | 8-12 | 50 | 1.35 |
| Ronkonkoma Middle School | 8 | Public | 6-8 | 672 | 2.50 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Sachem High School North | 8 | Public | 9-12 | 1,923 | 0.83 |
| Cleary School For The Deaf | NR | Private | PK-12 | 79 | 1.20 |
| Lake Grove School | NR | Private | 8-12 | 50 | 1.35 |
| Our Savior New American School | NR | Private | PK, K-12 | 122 | 2.70 |
| Centereach High School | 6 | Public | 9-12 | 1,475 | 3.24 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Emerald Street, Ronkonkoma.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 318 Yaphank Middle Island Rd, Yaphank | 12/21/2023 | $690,000 | |
| 625 Manor Yaphank Rd, Manorville | 08/02/2010 | $525,000 | |
| 27 Highland Ave, Farmingville | 1,524 | ||
| 2 Star Rd, Rocky Point | 1,368 | 07/20/2015 | |
| 18 Woodycrest Dr, Farmingville | 1,316 | 06/01/2017 | $350,000 |
| 44 Gatelot Ave, Ronkonkoma | 2,152 | 11/29/2017 | |
| 359 Wellwood Dr, Shirley | 1,632 | 07/26/2021 | |
| 355 Wellwood Dr, Shirley | 08/12/2019 | $349,000 | |
| 21 N Cozine Rd, Center Moriches | 09/18/2023 | $729,000 | |
| 41 Ficus Rd, Rocky Point | 1,704 | 12/08/2010 | $360,000 |
| 58 Beech Ave, Farmingville | 06/22/2020 | $425,000 | |
| 17 N Cozine Rd, Manorville | 08/01/2022 | $620,000 | |
| 115 Long Island Ave, Yaphank | 10/02/2009 | ||
| 100 Rose Executive Blvd, Shirley | 269,563 | 08/25/2009 | $1 |
| 4 Offenbach St, Ronkonkoma | 2,280 | 09/28/2020 | $540,000 |
| 27 Cozine Rd, Center Moriches | 11/03/2022 | $722,500 | |
| 42 Brentwood Ave, Farmingville | 1,615 | 12/13/2023 | $645,000 |
| 4 Oak Rd, Rocky Point | 1,107 | 10/23/2014 | |
| 29 Gatelot Ave, Ronkonkoma | 02/29/2016 | ||
| 38 Washington Ave, Holtsville | 1,992 |