21 Prospect St
Marlboro, NY 12542
3 bd 1 ba 1,390 sqft Built 1958 Lot 17,424 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $94,600 | $62,500 | $157,100 | $6,804 |
| 2024 | $93,600 | $62,500 | $156,100 | $6,659 |
| 2023 | $93,600 | $62,500 | $156,100 | $6,575 |
| 2022 | $93,600 | $62,500 | $156,100 | $6,873 |
| 2021 | $93,600 | $62,500 | $156,100 | $6,830 |
| 2020 | $93,600 | $62,500 | $156,100 | $6,327 |
| 2017 | $93,600 | $62,500 | $156,100 | $6,156 |
| 2016 | $93,600 | $62,500 | $156,100 | $6,223 |
| 2015 | $93,600 | $62,500 | $156,100 | $5,832 |
| 2014 | $93,600 | $62,500 | $156,100 | $6,719 |
| 2013 | $109,000 | $62,500 | $171,500 | $6,013 |
| 2012 | $109,000 | $62,500 | $171,500 | $5,241 |
| 2011 | $127,000 | $62,500 | $189,500 | $5,272 |
| 2010 | $141,100 | $69,000 | $210,100 | $6,010 |
| 2009 | $164,400 | $69,000 | $233,400 | $5,671 |
| 2007 | $116,000 | $49,000 | $165,000 | $3,969 |
Property facts
Year built
1958
Property type
single_family
Stories
1
Beds
3
Baths
1
Living area
1,390 sqft
Lot size
17,424 sqft
ZIP code
12542
City
Marlboro
Street
Prospect St
Coordinates
41.60996, -73.97733
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 Prospect St last sell?
No public-record sale is on file for 21 Prospect St.
What is the current tax assessment for 21 Prospect St?
The most recent total assessment for 21 Prospect St (year 2025) is $157,100 with $6,804 in property tax.
When was 21 Prospect St built?
21 Prospect St was built in 1958.
How does 21 Prospect St compare to others on Prospect St?
We track 8 other properties on Prospect St. Browse the list under "Other properties on Prospect St" to compare beds, baths, and sale history.
What are the property facts for 21 Prospect St?
21 Prospect St is a 3 bed, 1 bath, 1,390 sqft, 17,424 sqft lot single_family.
Is 21 Prospect St a flip candidate?
No — 21 Prospect St does not appear in our flips dataset.
Is 21 Prospect St a tax-appeal candidate?
No — 21 Prospect St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-0.9%
Implied 1-yr
-3.5%
2026 Q2
$492.8K
2026 Q3
$492.8K
ZIP 12542 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Prospect St