Welcome to 646 Science Street, a striking modern 3-bedroom, 4-bath residence meticulously designed by Cipriani Studios, ideally located in the heart of Mt. Washington. From the moment you enter through the dramatic pivot entry door, the home makes an immediate impression with clean architectural lines, sophisticated finishes, oversized windows, and an abundance of natural light. The first floor features a stunning open-concept layout, highlighted by the gourmet kitchen, great room, and dining area, creating a seamless space ideal for entertaining and everyday living. This level also includes a powder room, access to a large rear deck constructed of low-maintenance materials, and a front-facing balcony, offering multiple outdoor spaces to relax and entertain. Designed for effortless smart living, the home is equipped with Control4 automation, 18 Paradigm in-ceiling speakers, motorized blinds, Ecobee thermostats, and a Vector security system. Fry Reglet trim is thoughtfully utilized throughout to create the illusion of floating floors and showcase the home’s refined modern aesthetic. The chef’s kitchen is a true centerpiece, featuring Calacatta quartz countertops with a waterfall edge, abundant cabinetry, a 42" Sub-Zero French-door refrigerator, 48" Wolf gas range with griddle and pot filler, Wolf wall oven and microwave, and a Miele stainless dishwasher. An adjacent wet bar accented with bold Broadway Black Velvet quartz includes a Marvel professional beverage center and a dual-zoned under-counter wine unit, adding both function and dramatic style. Upstairs, the spacious primary suite is a private retreat featuring floor-to-ceiling windows, a dramatic 18’ x 12’ tiled accent wall, and access to a private balcony. The suite also includes a large walk-in closet with an in-suite washer and dryer. The spa-like primary bath, enhanced by backlit mirrors, offers a heated Kohler soaking tub with bubble massage and a fully customizable 7-spray Kohler digital shower system, controlled by an in-shower digital touchpad. Two additional bedrooms are located on this level, each offering generous closet space and striking feature walls. The hall bath is beautifully appointed with a dual vanity featuring vessel sinks and a single, backlit mirror, providing both style and functionality. The entrance level enhances everyday convenience and flexibility, offering a full bath, an additional laundry area, ample storage, and direct access to the patio. A striking floating staircase with iron cable railings and LED-backlit treads provides architectural continuity throughout the home. Additional highlights include a two-car garage with EV outlet, a Generac generator, and an extraordinary rooftop terrace prepped with water and gas and featuring an integrated Weber gas grill. From this elevated outdoor retreat, enjoy breathtaking panoramic views of the city of Pittsburgh and the surrounding landscape, unforgettable sunsets, and front-row views of the city’s iconic firework displays. A rare opportunity to own a residence that seamlessly blends cutting-edge design, luxury finishes, smart technology, and exceptional indoor-outdoor living.
Allentown, located between Mount Washington and South Side Slopes, is a hillside and residential Pittsburgh neighborhood with steep stair streets and skyline overlooks. The neighborhood’s character concentrates around Warrington Avenue at Allen Street, where corner bars, small eateries, and murals meet the hum of the 51 bus line. Rows of brick and frame houses cling to the slope, with pocket views opening between retaining walls and stoops. The Pittsburgh Regional Transit Allentown Station anchors daily movement up and down the hill. Bottlerocket Social Hall and Black Forge Coffee House serve as cultural touchstones, pairing live events with a lived-in, local feel. Nearby overlooks and stairways turn routine walks into mini climbs with city panoramas.
Provided by Walk Score and Local Logic
Offer insights
646 Science St · $1,190,000
$1.18M and above
75% chance or better to win
Why $1.18M+ is a strong offer
DAYS ON MARKET
171 days
The average home goes pending in 53 days.
SALE-TO-LIST
97.5%
Most homes are selling 2% below list price.
About offer insights
Property details
Interior
Exterior
Finance
Kitchen
Bathroom
Bedroom
Living
Dining
Interior features
Wet bar
Kitchen island
Window treatments
Multi-pane windows
Bathrooms
3 full bathrooms
Kitchen
Convection oven
Dishwasher
Disposal
Microwave
Refrigerator
Stove
Laundry & utility
Washer
Dryer
Flooring
Hardwood
Tile
Heating & cooling
Forced air heating (gas)
Central air conditioning (electric)
Exterior features
Walk-out basement access
Security system
Home design
3 stories
Resale property
Parking
Built-in garage with garage door opener
2 parking spaces (total)
Security
Security system
Construction
Concrete and steel construction
Utilities
Public water
Public sewer
Electricity and solar
View estimated energy costs and solar savings for this home
Welcome to 646 Science Street—a sleek, modern 3 bedroom, 4 bath residence designed by Cipriani Studios in the heart of Mt. Washington. From the moment you step through the striking pivot entry door, you’ll be surrounded by natural light, oversized windows, and stunning city views. Smart living is effortless with Control4 automation, 18 Paradigm ceiling speakers, motorized blinds, Ecobee thermostats, and Vector security. The chef’s kitchen features Calacatta quartz with a waterfall edge and premium Wolf, Sub-Zero, and Miele appliances. Relax by two eco-friendly fireplaces or entertain in the dramatic open floor plan with exquisite architectural features. The spa-like primary bath offers a heated Kohler soaking tub with bubble massage, and a 7-spray custimizable shower. A 2-car garage with EV outlet, Generac generator, and a rooftop terrace prepped with water/gas make this home as functional as it is beautiful. Enjoy unforgettable sunsets and a lifestyle of luxury, innovation, and comfort.
West Penn MLS #1694995
Sep 19, 2025
Delisted
—
Jun 18, 2025
Price Changed
$1,199,999
$369/sq ft
Apr 3, 2025
Listed
$1,275,000
$392/sq ft
+40
Discover modern living at 646 Science Street, a custom-built home in Bailey Park, a sought-after Mount Washington neighborhood. Designed by acclaimed Cipriani Studios this stunning residence seamlessly integrates advanced technology with high-end finishes and numerous smart home features for ultimate convenience. The 1st floor boasts a gourmet kitchen, dining area, and spacious living room featuring 2 bioethanol fireplaces. It's open-concept, soaring ceilings, and floating staircase create a sleek, contemporary ambiance. On the 2nd level, you'll find 3 bedrooms and 2 full bathrooms, including a master suite with breathtaking views, a large walk-in closet, en-suite bath, and private balcony. The expansive rooftop deck offers incredible city views. The lower level includes a finished basement with 2 versatile rooms, a finished bathroom and a 2 car garage. With its stylish design and close proximity to shopping and dining, this home is a rare gem in a vibrant community.
West Penn MLS #1672855
Sep 23, 2024
Listed
$1,390,000
$427/sq ft
Year
Property tax
Land + Additions
Assessment*
2026
$14,160 (+6.5%)
$85,800 + $451,600
$537,400
2025
$13,295 (+7.4%)
$85,800 + $451,600
$537,400
2024
$12,382
$85,800 + $451,600
$537,400
2023
$12,382 (+1.3%)
$85,800 + $451,600
$537,400
2022
$12,220
$85,800 + $451,600
$537,400
2021
$12,220 (+20,669.0%)
$85,800 + $451,600
$537,400
2020
$59
$85,800 + $451,600
$537,400
2019
$59
$2,600
2018
$59
$2,600
Public record
Beds
4
Baths
3.5
Stories
2
Lot width
—
Lot depth
—
Lot size
4,531 Sq. Ft.
Year renovated
—
Finished Sq. Ft.
3,252
Unfinished Sq. Ft.
—
Total Sq. Ft.
3,252
Year built
2020
Style
Single Family Residential
County
Allegheny County
APN
0003N00220000000
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 21, 2026.
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
3/10 Heat Factor
5 days above 96° expected this year, 13 days in 30 years
2/10 Wind Factor
Minor risk of severe winds over next 30 years
3/10 Air Factor
3 unhealthy days expected this year, 5 days in 30 years
Provided by First Street
Historical weather
Pittsburgh, PA • 15210
Average low and high temperatures (°F)
31
18
39
24
58
38
67
47
69
52
81
64
85
69
81
62
78
57
67
46
53
38
41
27
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
81/ 100
Very good sunlight
Sunscore
This home receives average direct sun exposure in Pittsburgh. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
7.7 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Redfin Estimate for 646 Science St
We cannot show automated home-value estimates for this home.
Nearby homes have recently sold between $229,000 and $510,000.
Nearby comparable homes
The Redfin Estimate uses 6 recent nearby sales, priced between $229K to $510K.