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MLS ID KEY1037620Last updated Sep 18, 2026

Single Family

45 Penataquit Avenue

Active · Islip · Suffolk County, NY 11706

Bedrooms
10 Beds
Bathrooms
7 Baths
Year built
1850
Est. monthly taxes
$3,195.08
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About this home

Step back in time and experience the grandeur of this extraordinary 1850 Victorian estate, a truly one-of-a-kind residence where timeless architecture, remarkable scale, and old-world craftsmanship create something rarely found today. Set on 1.64 breathtaking, park-like acres, this magnificent property offers exceptional privacy, an inground pool, and endless possibilities. From the moment you enter, soaring ceilings, intricate crown moldings, beautiful hardwood floors, and exquisite period details capture the elegance and charm of a bygone era. Three expansive floors of living space feature a magnificent living room, grand banquet-sized formal dining room, large eat-in kitchen, and an inviting den with fireplace. The main residence offers an impressive ten bedrooms, seven full baths, and a full basement, providing extraordinary space and versatility. The estate also features a separate back house offering four additional bedrooms, two full baths, and a two-car garage, adding another remarkable dimension to this unique property. Rich in history and overflowing with character, this exceptional Victorian estate presents a rare opportunity to restore, reimagine, and create something truly spectacular. From its grand interior spaces to its sprawling grounds and resort-style pool, this is more than a home. It is a piece of history waiting for its next chapter. Make this extraordinary one-of-a-kind estate yours.

Listing snapshot

Days on site
59 days
Listed on MLS
Aug 12, 2026
Full baths
7
Half baths
0
Annual property tax (MLS)
$38,341
Tax year
2025
Area source (MLS)
Public Records
Listing brokerage
Netter Real Estate Inc
MLS ID
KEY1037620
Last updated
Sep 18, 2026

General features

Property type
Single Family
Property subtype
Single Family Residence
Year built
1850
Garage
Yes
Garage spaces
2
Parking
Driveway
Water source
Public
Sewer
Public Sewer
Utilities
Electricity Connected, Natural Gas Connected, Sewer Connected, Water Connected

Interior features

Basement
Full
Heating
Natural Gas
Cooling
Central Air
Interior
First Floor Full Bath, Built-in Features, Chefs Kitchen, Crown Molding, Eat-in Kitchen, Entrance Foyer, Formal Dining, Granite Counters, High Ceilings, Kitchen Island, Primary Bathroom, Storage, Walk-In Closet(s)
Appliances
Gas Cooktop, Gas Oven, Refrigerator
Flooring
Wood
Fireplace
Yes
Fireplaces
1

Exterior features

Architectural style
Victorian
Construction materials
Vinyl Siding
Private pool
Yes

Schools (MLS)

Elementary school
Brook Avenue Elementary School
Elementary school district
Bay Shore
Middle school
Bay Shore Middle School
Middle school district
Bay Shore
High school
Bay Shore Senior High School
High school district
Bay Shore

School information is provided by the MLS. Confirm attendance eligibility with the school district.

Recent activity

  1. Listing updated from MLS
  2. First seen on this site
  3. MLS status changed

Location

Islip · Suffolk County, NY 11706Show interactive map
45 Penataquit Avenue

Islip · Suffolk County, NY 11706

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Estimate monthly payment

Loan detailsFixed-rate, fully amortizing loan. Edit the assumptions below; no market rate is supplied.
Property expenses (USD)
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Estimated monthly principal & interest—

Monthly property taxNot provided

Monthly association / maintenance feesNot provided

Estimated monthly total of entered costs—

Excludes insurance, mortgage insurance, special assessments and lender fees. MLS taxes may reflect abatements or exemptions and can change.

Listing data is supplied by the MLS and may change without notice.