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670 Union Street 3ABrooklyn, NY 11215

For Sale

$2,300,000

Smart Buyer Rebate $28,750

Presenting the first resale opportunity at Timber House, the groundbreaking Park Slope condominium from the celebrated Brooklyn Home Company. Residence 3A is a meticulously designed 1,395-square-foot, two-bedroom, two-bathroom home that represents a new paradigm for sustainable luxury living in New York City.

Upon entering, you are greeted by an expansive great room designed for both sophisticated entertaining and tranquil daily life, with soaring ceilings and wide-plank white oak floors creating an atmosphere of airy refinement. Every window is triple-glazed and Passive House-quality, blocking outside noise. The open-plan chef's kitchen is a model of functional elegance, featuring custom, hand-painted cabinetry, integrated Bosch and Liebherr appliances, and a stunning honed marble countertop and backsplash that seamlessly blend form and function.

The primary suite serves as a serene private retreat, generously proportioned and complete with a spacious walk-in closet. The en-suite bathroom is a sanctuary of its own, finished with bespoke mosaic tiles, a custom vanity, and a glass-enclosed walk-in shower. The second bedroom is equally well-appointed, offering flexibility as a guest room, nursery, or spacious home office, and is situated adjacent to a beautifully detailed second full bathroom.

Timber House is a landmark in sustainable architecture. As one of the city’s first mass-timber buildings, its construction from cross-laminated timber offers superior thermal and acoustic performance, promoting a sense of wellness and quietude rarely found in urban construction. This Passive House-inspired design results in significantly lower energy consumption and a healthier living environment.

With only 14 residences, the building offers a distinct boutique and private feel. Residents enjoy access to a beautifully landscaped common roof deck with panoramic views of the Brooklyn and Manhattan skylines. This sale includes a private storage unit. For added convenience, a deeded parking space equipped with an electric vehicle charger is also available for separate purchase—a truly rare asset in Park Slope.

Located at the nexus of Park Slope and Gowanus, 670 Union Street offers unparalleled access to the neighborhood's rich cultural and culinary landscape. You are moments from Prospect Park, the weekend Farmer's Market, the boutiques and restaurants of 5th and 7th Avenues, and multiple transportation lines, ensuring a seamless commute.

This is more than a residence; it is an investment in forward-thinking design, environmental responsibility, and an elevated Brooklyn lifestyle.

Listed by Paul J Hyun

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Compass

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(718) 690-0297

Listed by Ian Mednick

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Compass

Last updated October 24, 2025

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Source: REBNY #RLS20047838

Listing Facts

  • TypeCondo
  • NeighborhoodNorth Slope
  • Bedrooms2
  • Bathrooms2
  • Days on Prevu43
  • HOA/Maint. Fees$523/month
  • Taxes$17,076/year
  • Size1,395 sqft
  • Price per sqft$1,649

Amenities

  • Dishwasher
  • Washer/Dryer
  • Pets Allowed
  • Parking

Location

Mortgage Calculator

Listing History

09/11/2025
Listed by Compass
$2,300,000

Estimated Closing Costs

Total
$84,020
Attorney Fees
$4,000
NYC Mansion Tax
$28,750
Title Insurance
$10,350
Bank Attorney
$1,500
Mortgage Recording Tax
$35,420
Other Closing Costs
$4,000

Estimated closing costs are based on the list price of $2,300,000 and a 20% downpayment. These estimates are for indicative purposes only. Actual closing costs may vary for each transaction. See the Closing Costs Calculator for calculations specific to your situation.

Property Details for 670 Union Street 3A

Association

Amenities

  • Pets Allowed: Building Yes

Fees

  • Association Fee: $523.00 Monthly

Exterior

Construction

  • Number Of Units Total: 14
  • Stories Total: 6
  • Structure Type: High Rise
  • Window Features: Double Pane Windows
  • Year Built: 2022
  • Entry Level: 3

Features

  • Building Features: Elevator(s)

Measurements

  • Lot Size Dimensions: 16
  • Lot Size Units: SquareFeet

Financial

Taxes

  • Parcel Number: 00955-1205
  • Tax Annual Amount: $17,076.00

Interior

Features

  • Appliances: Cooktop, Dryer, Dishwasher, Electric Cooktop, Electric Oven, Refrigerator, Range Hood, Stainless Steel Appliance(s), Washer
  • Flooring: Hardwood, Tile
  • Interior Features: Breakfast Bar, Double Vanity, High Ceilings, Soaking Tub, Walk-In Closet(s)

Measurements

  • Living Area: 1,395
  • Living Area Units: SquareFeet

Rooms

  • Bathrooms Full: 2
  • Bathrooms Total Integer: 2
  • Bedrooms Total: 2
  • Rooms Total: 4

Other

Location

  • City Region: Brooklyn
  • Subdivision Name: Park Slope
  • Tax Block: 00955
  • Tax Lot: 0033

Parking

Parking

  • Garage: Yes
  • Parking Features: Garage, On Site

Utilities

Equipment

  • Cooling: Central Air
  • Has Cooling: Yes
  • Heating: Central
  • Has Heating: Yes
  • Laundry Features: In Unit, See Remarks

Based on information from Real Estate Board of New York and/or other sources. This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2025 The Real Estate Board of New York, Inc., All rights reserved.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.