# 31 Underhill Avenue, Syosset, NY 11791 > **TL;DR:** 5bd/4ba single family, $1,988,000 ($736/sqft), built 2026, 2,700 sqft. > Hardwood, A/C, 1-car garage. Est. $10,632/mo. Listed 107 days. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $1,988,000 | | Price/sqft | $736 | | Bedrooms | 5 | | Bathrooms | 4 full | | Square Feet | 2,700 | | Year Built | 2026 | | Lot Size | 6,800 sqft (0.16 acres) | | Garage | 1-car | | Property Type | Single Family (Single Family Residence) | | Status | Active | | Days on Market | 107 | ## Why This Home Stands Out - **Hardwood Floors** - Hardwood flooring listed ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $10,052 | | Estimated Insurance | $580 | | **Total** | **$10,632** | ## Nearby Schools - **Elementary:** Willits Elementary School - **Middle:** H B Thompson Middle School - **High:** Syosset Senior High School ## Key Amenities - Hardwood - A/C - 1-car garage ## Property Highlights - Built in 2026 - 0.16 acre lot ## Description ### Agent Description New luxury construction in Syosset. Experience exceptional craftsmanship and modern luxury in this stunning new construction home, thoughtfully designed with today's lifestyle in mind. Offering five spacious bedrooms and four full bathrooms. This home seamlessly blends elegant finishes with functional living space. The main level features a desirable first floor bedroom and full bath, ideal for guests, extended family, or private home office. The heart of the home is a chef inspired gourmet kitchen beautifully appointed with top-of-the-line appliances, custom cabinetry, designer lighting and an open layout perfect for entertaining. The sun filled living and dining area flow effortlessly together with convenient access to the attached garage Upstairs retreat to the luxurious primary suite featuring a spacious walk-in closet and a spa like bath, complete with a soaking tub, oversized walk-in shower and premium finishes. A junior en-suite offers its own private full bath with a walk-in shower while two additional generously sized bedrooms share a beautiful appointed full bath. A conveniently located second floor laundry room completes the upper level. Every detail has been carefully selected from the designer lighting and elegant fixtures to the high-quality craftsmanship found throughout. Simply unpack, add your personal style and enjoy effortless luxury. Perfectly situated within the Syosset school district this exceptional home is just minutes from major highways, the Syosset library, parks, shopping, dining and everything the community has to offer. A rare opportunity to own a brand new luxury home in one of Long Island's most sought after neighborhoods. This is truly one you don't want to miss! ## Location - **Address:** 31 Underhill Avenue, Syosset, NY 11791 - **County:** Nassau County - **Coordinates:** 40.806, -73.500981 - **Google Maps:** https://www.google.com/maps?q=40.806,-73.500981 ## Virtual Tour & Media - **Video Tour:** https://view.dynamicmediasolutions.com/31_underhill_ave-4217?branding=false ## Listing Agent - **Name:** Debra McSheffrey Kiehn - **Brokerage:** Signature Premier Properties - **Broker Phone:** (631) 673-3700 - **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/31-Underhill-Ave_Syosset_NY_11791_M45035-33189?f=listhub&s=MLSLINY&m=1025506&c=propsimple) ## Photos ![31 Underhill Avenue - Photo 1](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3947071607r.jpg) ![31 Underhill Avenue - Photo 2](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2803557909r.jpg) ![31 Underhill Avenue - Photo 3](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1719847648r.jpg) ![31 Underhill Avenue - Photo 4](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2180205567r.jpg) ![31 Underhill Avenue - Photo 5](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1493900502r.jpg) ![31 Underhill Avenue - Photo 6](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2594911938r.jpg) ![31 Underhill Avenue - Photo 7](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2594911938r.jpg) ![31 Underhill Avenue - Photo 8](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3643849971r.jpg) ![31 Underhill Avenue - Photo 9](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3643849971r.jpg) ![31 Underhill Avenue - Photo 10](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f254869548r.jpg) ![31 Underhill Avenue - Photo 11](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3662762662r.jpg) ![31 Underhill Avenue - Photo 12](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3662762662r.jpg) ![31 Underhill Avenue - Photo 13](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f154298254r.jpg) ![31 Underhill Avenue - Photo 14](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3947071607r.jpg) ![31 Underhill Avenue - Photo 15](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f63067858r.jpg) ![31 Underhill Avenue - Photo 16](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3947071607r.jpg) ![31 Underhill Avenue - Photo 17](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1622641935r.jpg) ![31 Underhill Avenue - Photo 18](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1035987026r.jpg) ![31 Underhill Avenue - Photo 19](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f73704431r.jpg) ![31 Underhill Avenue - Photo 20](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1804901965r.jpg) ![31 Underhill Avenue - Photo 21](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3694711382r.jpg) ![31 Underhill Avenue - Photo 22](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2291516685r.jpg) ![31 Underhill Avenue - Photo 23](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3414071949r.jpg) ![31 Underhill Avenue - Photo 24](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2404979012r.jpg) ![31 Underhill Avenue - Photo 25](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f4235459011r.jpg) ![31 Underhill Avenue - Photo 26](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f365894674r.jpg) ![31 Underhill Avenue - Photo 27](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3414071949r.jpg) ![31 Underhill Avenue - Photo 28](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1844429612r.jpg) ![31 Underhill Avenue - Photo 29](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3113025784r.jpg) ![31 Underhill Avenue - Photo 30](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1254991007r.jpg) ![31 Underhill Avenue - Photo 31](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f459200358r.jpg) ![31 Underhill Avenue - Photo 32](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1381742825r.jpg) ![31 Underhill Avenue - Photo 33](http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1166077610r.jpg) --- **MLS#:** 1025506 | **Updated:** 2026-10-25 **Source:** listhub *Copyright © 2026 OneKey MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.* [View on PropertySimple](https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa#listing", "url": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa", "name": "31 Underhill Avenue, Syosset, NY 11791", "description": "New luxury construction in Syosset. Experience exceptional craftsmanship and modern luxury in this stunning new construction home, thoughtfully designed with today's lifestyle in mind. Offering five spacious bedrooms and four full bathrooms. This home seamlessly blends elegant finishes with functional living space. The main level features a desirable first floor bedroom and full bath, ideal for guests, extended family, or private home office. The heart of the home is a chef inspired gourmet kitchen beautifully appointed with top-of-the-line appliances, custom cabinetry, designer lighting and an open layout perfect for entertaining. The sun filled living and dining area flow effortlessly together with convenient access to the attached garage Upstairs retreat to the luxurious primary suite featuring a spacious walk-in closet and a spa like bath, complete with a soaking tub, oversized walk-in shower and premium finishes. A junior en-suite offers its own private full bath with a walk-in shower while two additional generously sized bedrooms share a beautiful appointed full bath. A conveniently located second floor laundry room completes the upper level. Every detail has been carefully selected from the designer lighting and elegant fixtures to the high-quality craftsmanship found throughout. Simply unpack, add your personal style and enjoy effortless luxury. Perfectly situated within the Syosset school district this exceptional home is just minutes from major highways, the Syosset library, parks, shopping, dining and everything the community has to offer. A rare opportunity to own a brand new luxury home in one of Long Island's most sought after neighborhoods. This is truly one you don't want to miss!", "image": [ "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3947071607r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2803557909r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1719847648r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2180205567r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1493900502r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2594911938r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3643849971r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f254869548r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3662762662r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f154298254r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f63067858r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1622641935r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1035987026r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f73704431r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1804901965r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3694711382r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2291516685r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3414071949r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2404979012r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f4235459011r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f365894674r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1844429612r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3113025784r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1254991007r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f459200358r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1381742825r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1166077610r.jpg" ], "primaryImageOfPage": { "@type": "ImageObject", "url": "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3947071607r.jpg", "caption": "31 Underhill Avenue - Syosset, NY" }, "datePosted": "2026-07-16", "dateModified": "2026-10-25T20:30:47.235Z", "mainEntity": { "@type": "Accommodation", "@id": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa#property", "name": "31 Underhill Avenue, Syosset, NY 11791", "address": { "@type": "PostalAddress", "streetAddress": "31 Underhill Avenue", "addressLocality": "Syosset", "addressRegion": "NY", "postalCode": "11791", "addressCountry": "US" }, "geo": { "@type": "GeoCoordinates", "latitude": 40.806, "longitude": -73.500981 }, "image": [ "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3947071607r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2803557909r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1719847648r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2180205567r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1493900502r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2594911938r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3643849971r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f254869548r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3662762662r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f154298254r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f63067858r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1622641935r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1035987026r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f73704431r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1804901965r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3694711382r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2291516685r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3414071949r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f2404979012r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f4235459011r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f365894674r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1844429612r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f3113025784r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1254991007r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f459200358r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1381742825r.jpg", "http://lh.rdcpix.com/bcf9184095a660527900f85f177e587fl-f1166077610r.jpg" ], "identifier": { "@type": "PropertyValue", "propertyID": "MLS", "value": "1025506" }, "accommodationCategory": "Single Family Residence", "numberOfBedrooms": 5, "numberOfBathroomsTotal": 4, "numberOfFullBathrooms": 4, "floorSize": { "@type": "QuantitativeValue", "value": 2700, "unitCode": "FTK", "unitText": "square feet" }, "yearBuilt": 2026, "amenityFeature": [ { "@type": "LocationFeatureSpecification", "name": "Heating", "value": "Natural Gas" }, { "@type": "LocationFeatureSpecification", "name": "Cooling", "value": "Central Air" }, { "@type": "LocationFeatureSpecification", "name": "Appliances", "value": "Dishwasher, Dryer, Refrigerator, Stainless Steel Appliance(s), Tankless Water Heater, Washer" }, { "@type": "LocationFeatureSpecification", "name": "Flooring", "value": "Tile, Hardwood" }, { "@type": "LocationFeatureSpecification", "name": "Construction Materials", "value": "Frame" }, { "@type": "LocationFeatureSpecification", "name": "Pool Features", "value": "Patio" }, { "@type": "LocationFeatureSpecification", "name": "Parking Features", "value": "Driveway" }, { "@type": "LocationFeatureSpecification", "name": "Air Conditioning", "value": true }, { "@type": "LocationFeatureSpecification", "name": "Hardwood Floors", "value": true } ], "additionalProperty": [ { "@type": "PropertyValue", "name": "Lot Size", "value": "0.16 acres" }, { "@type": "PropertyValue", "name": "Garage Spaces", "value": 1 }, { "@type": "PropertyValue", "name": "Property Subtype", "value": "Single Family Residence" } ] }, "offers": { "@type": "Offer", "@id": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa#offer", "url": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa", "price": 1988000, "priceCurrency": "USD", "businessFunction": "http://purl.org/goodrelations/v1#Sell", "availability": "https://schema.org/InStock", "seller": { "@id": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa#agent" } }, "provider": { "@type": "Person", "@id": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa#agent", "name": "Debra McSheffrey Kiehn", "worksFor": { "@type": "Organization", "@id": "https://www.propertysimple.ai/listing/31-underhill-avenue-syosset-ny-11791-511a4b5024264b5fa78fb883d1f854fa#brokerage", "name": "Signature Premier Properties", "telephone": "(631) 673-3700", "logo": { "@type": "ImageObject", "url": "http://lh.rdcpix.com/c5ababc320d9ff0f0120de6bf56100c3k-c30336324r.png" } } } } ```