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Single family home for sale at 18 Walnut Ave, Brookhaven, NY 11733 | MLS# 1041938 | Listing updated on 2026-11-05
Photo 1 of Single family home for sale at 18 Walnut Ave, Brookhaven, NY 11733 | MLS# 1041938 | Listing updated on 2026-11-05
Photo 2 of Single family home for sale at 18 Walnut Ave, Brookhaven, NY 11733 | MLS# 1041938 | Listing updated on 2026-11-05
Photo 3 of Single family home for sale at 18 Walnut Ave, Brookhaven, NY 11733 | MLS# 1041938 | Listing updated on 2026-11-05
Photo 4 of Single family home for sale at 18 Walnut Ave, Brookhaven, NY 11733 | MLS# 1041938 | Listing updated on 2026-11-05
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$899,000

Monthly Est:$4,475

  • Beds Icon3 Beds
  • Beds Icon
    2 Baths
  • Beds Icon2,250sqft

18 Walnut Ave, Brookhaven, NY 11733

$4,475/moEst:

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  • Single Family Residence

  • Built in 1937

  • $-- HOA

  • 6,098 sqft lot

  • $400/sq.ft

Description

Also offered for lease at $4700/mo. The very best of North Shore living - just up the block from your private Village beach on Port Jefferson Harbor, with lounging areas and mooring rights - introducing 18 Walnut, in the idyllic, harborside community that is the Incorporated Village of Poquott. Warmth abound, this home has elements of craftsman, bungalow, and saltbox design, inside and out, with genuine curb appeal and a footprint spanning approximately 2,250 sq ft that stands apart from the cookie-cutter norm - a coastal charmer with upgrades already in place and room to make it your own. Enter through a vaulted front lounge room, wrapped in windows with 9' ceilings, that flows wonderfully into a generous living room, featuring an original stone fireplace. An oversized entry transitions into a formal dining room, with a bay window, that makes for great entertaining space. The two-tone cottage kitchen offers a 2023 gas range, 2025 dishwasher, breakfast bar, upgraded bay window, and slider to the yard, with real upside for those looking to further expand. Just off the kitchen, a cozy den features more vaulted ceilings and 2 new skylights, while antique details bring character to a spacious first floor full bath with walk-in shower and laundry. Upstairs, the primary bedroom spans the width of the house, with 11' ceilings, dual shallow walk-in closets outfitted with systems, a full wall of finished eave storage, and potential to add an ensuite. An upgraded full bath, 2 additional bedrooms, a generous linen closet, and attic access complete the second floor. The lower level, refinished in 2025, offers an above-grade walkout room (to the front) with 3 windows - ideal as a den or study - plus access to additional unfinished storage and a finished exterior "shed" built into the residence. Significant structure and system upgrades include new skylights (2025), a partial new roof, mostly-upgraded Andersen windows, 2015 Lennox central air and heat, 2011 vinyl cedar impression siding with Azek trim and roof, extensive sheetrock and insulation work, a 2018 hot water heater, upgraded 200-amp electrical service, floor plan changes, and more. First floor hardwood floors refinished and gleaming as of Oct 3, and professional painting is underway. The backyard is secret-garden style - enveloped in greenery, flowering trees and plantings, with a natural stone pathway and patio, a deck strung with bistro lighting, and an outdoor shower - while the front offers a gravel driveway, planting beds, a paver walkway and patio, and ample parking. Village of Poquott residents are afforded access to three private beaches on Port Jeff & Setauket Harbors, with exclusive mooring rights, lounge areas, and kayak/dinghy racks, a Village dock, a boat ramp, a newly updated tennis court, multiple parks and playgrounds, gardens, private security and code enforcement, and an active annual social calendar. Zoned for the Three Village School District (Setauket Elementary, Gelinas Junior High, Ward Melville High School), 18 Walnut is a three-minute drive to Port Jefferson Village's harborside downtown and ferry access to New England, and about 12 minutes to the world renowned institutions that are Stony Brook University & Hospital. Also offered for lease annually, at $5200/mo. True taxes total to $14,041, which includes Village of Poquott taxes of $1,195. Some photos have been virtually staged but all remain true to layout/structure.

  • Houzeo last checked: 5 hours ago
  • Listing updated: November 5, 2026 at 3:45 pm
  • Listing Provided by: Edward Schmidt (631) 946-1895 | Douglas Elliman Real Estate (631) 549-4400
  • Source: OneKey MLS-NY as distributed by MLS GRID | MLS#: 1041938 OneKey MLS-NY as distributed by MLS GRID

Property Details

  • Status

    Active

  • Type

    Single Family Residence

  • No. of Stories

    -

  • County

    Suffolk County

  • City

    Brookhaven

  • Neighborhood

    --

  • Year Built

    1937

  • HOA Fees

    -

  • Finished Area

    2,250 sqft

  • Lot Size

    6,098 sqft lot

  • Basement Area

    - sqft

  • MLS Name

    OneKey MLS

  • MLS Number

    1041938

  • MLS Status

    Active

  • Days on Market

    63

  • Cumulative Days on Market

    64

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Location

Facts & Features

Rooms

  • Bedrooms & bathrooms

    Bedrooms: 3

    Bathrooms: 2

Interior

  • Exterior Features

    Dock, Fire Pit, Garden, Mooring, Other, Playground, Tennis Court(s)

  • Appliances

    Dishwasher, Dryer, Gas Range, Microwave, Refrigerator, Stainless Steel Appliance(s), Washer

  • Cooling

    Central Air

  • Heating

    Hot Air, Oil, Other

  • Window Features

    Bay Window(s), Skylight(s), Wall Of Windows

  • Sewer

    Cesspool

  • Flooring

    Hardwood

  • Interior Features

    First Floor Full Bath, Breakfast Bar, Cathedral Ceiling(s), Crown Molding, Eat In Kitchen, Entrance Foyer, Formal Dining, High Ceilings, His And Hers Closets, Open Floorplan, Original Details, Other, Pantry, Recessed Lighting, Storage

Construction

  • Year Built

    Year Built: 1937

  • Home type

    Single Family Residence

  • Property Condition

    Updated/remodeled

  • Construction Materials

    Frame, Vinyl Siding

  • Architectural Style

    Colonial, Craftsman, Other, Saltbox, Traditional

Utilities & Energy

  • Utilities

    Electricity Connected, Water Connected

  • Association Amenities

    Boat Dock, Other, Park, Playground, Tennis Court(s)

  • Parking Features

    Driveway

  • Fireplace Features

    Living Room, Wood Burning

  • Basement

    Finished, Full, Partially Finished, See Remarks, Storage Space, Walk Out Access

  • Water Source

    Public

Other Features

  • Community Features

    Other, Park, Playground, Tennis Court(s)

  • Patio And Porch Features

    Deck, Patio

  • Lot Features

    Back Yard

Price History

DateEventPrice

10/05/2026

Source: mls_logoOneKey MLS-NY #KEY1045073

Price Decreased

$4,700 -99.50%

$2/sqft

09/02/2026

Source: mls_logoOneKey MLS-NY #KEY1041938

Price Increased

$949,000 +5.56%

$422/sqft

09/02/2026

Source: mls_logoOneKey MLS-NY as distributed by MLS GRID #KEY1041938

Price Increased

$899,000 +17188.46%

$400/sqft

09/01/2026

Source: mls_logoOneKey MLS-NY #KEY1045073

Price Increased

$5,200 +10.64%

$2/sqft

09/01/2026

Source: mls_logoOneKey MLS-NY as distributed by MLS GRID #KEY1045073

Listed for Sale

$4,700

$2/sqft

Nearby Homes

Based on information from OneKey MLS® through Nov 05, 2026, 12:46PM as submitted to and distributed by MLS GRID. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. IDX information is provided exclusively for consumers’ personal non-commercial use. It may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data is deemed reliable but is not guaranteed by MLS GRID. The use of the MLS GRID Data may be subject to an end-user license agreement prescribed by the Member Participant’s applicable MLS, if any, and as amended from time to time. © 2026 OneKey MLS. All rights reserved.

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