143 S Montgomery Street, Valley Stream, NY 11580

$1,100,000 · 4 bed · 2 bath · built 1951 · MLS# 1024816 · Active

** Price Improvement!** Welcome to your new home or next investment property nestled in a tree lined, quiet street! This wonderfully maintained legal duplex (2 bd over 2 bd) boasts an incredible & spacious yard, an attached garage + ample parking spaces (has space to expand with permits). Front porch and back deck for entertaining. A separate entrance in rear takes you to the full basement with plenty of space, laundry room & bonus rooms galore. There's a (legal) half bath that can be upgraded with proper permits. The possibilities…

Two-to-three-family homes in the Valley Stream Union Free School District 30 sold for a median of $940,000 (typically $800,000–$995,000) across 7 recorded sales between Jan 22, 2026 and Sep 28, 2026. Too small a sample to be statistically stable — that median rests on 7 recorded sales, so a single sale moves it substantially. Treat it as a starting point rather than a market reading.

ZIP 11580 has about 5.7 months of multi-family inventory — balanced market. Supply and demand are roughly even, so buyers and sellers share leverage with fair, predictable pricing.

At about $19,500 a year, this home's property tax runs roughly 77% above the $11,000 typical for Valley Stream Union Free School District 30. Nassau assessments run on a multi-year cycle, so the assessed value behind this bill can lag what the home actually sells for today. A sale does not automatically reset it, and exemptions such as STAR, Senior or Veteran move the number as well — a new owner's bill is often not the same as the seller's.

OneKey MLS (recorded LI sales, trailing 12mo) + actual tax