Unit 1 is an absolutely stunning grand duplex with eight exceptional rooms. As with all the luxury homes in this treasure of a building, this one includes all new custom windows and exterior doors by Marvin, a rubber roof system and hi-efficiency HVAC by Mitsubishi.

The meticulous metamorphosis, with impeccable attention to detail, celebrates an innovative and luxurious design of four stunning residences in a gorgeous five-story brownstone. There’s only one home left waiting for a new owner in this sparkling high end new luxury building at 67 Saint Botolph St. in the Back Bay very near the popular South End.

Unit 1 is an absolutely stunning grand duplex with eight exceptional rooms. As with all the luxury homes in this treasure of a building, this one includes all new custom windows and exterior doors by Marvin, a rubber roof system and hi-efficiency HVAC by Mitsubishi.

Joe Baglio and Aris Snyder of Bay State Residential are offering this spacious 2,330-square-foot home for $2,999,000.

This luxurious beauty showcases light and airy rooms with three-inch-wide white oak hardwood flooring, high ceilings with recessed LED downlights plus sophisticated and timeless finishes throughout. Lots of windows amplify the natural light and provide exceptional views of the pleasing neighborhood.

The parlor (upper) level offers 1,440 square feet of living space. The inviting bright and modern expansive floor plan is perfect for entertaining. A coat closet is conveniently placed near the wooden staircase and the elevator.

On one side of the stairs is a lovely living room. This sizable room has three bay windows set in the alcove offering a pretty space for seating or eating. Above the 36-inch Spark Modern gas fireplace with a black surround is a niche that can display a wall-mounted television or art décor for family and guests to enjoy.

The dining room is spacious enough to host plenty of people for a delectable culinary experience.

The chef’s kitchen is perfectly designed. The white custom Shaker cabinetry by Crown Point with sleek Carrara marble counters and backsplash plus elite stainless appliances make this a joyful space to create great meals.

One wall is lined with a stainless 36-inch built-in Sub-Zero refrigerator, accompanied by floor-to-ceiling cabinetry. The opposite wall entertains the elite Wolf appliances – a 30-inch oven, 24-inch microwave drawer and five-burner contemporary cooktop with a Miele visor hood and additional cabinetry.

The peninsula overlooking the family room hosts the Asko dishwasher and Kohler Strive 24-inch stainless steel sink with Franke stainless steel pulldown faucet. Two bubble pendants sit above this bar with seating for two or three people.

The grand family room is light and airy with plenty of windows, recessed lighting and the glow from the flames in the 36-inch Spark Modern gas fireplace positioned below a niche waiting for the perfect embellishment. This room might be the perfect place to create a multimedia entertainment center. On the other hand, the room is large enough to enjoy a game of pool, if desired.

Across from the kitchen, an intimate room sits behind a set of opaque-glass barn doors - ideal for a private study. Another door in this room opens to pretty powder room.

The master suite on the garden (lower) level of this delightful duplex is a magnificent world of comfort unto itself. The bedroom is spacious enough to fit a king-size bed with all the prerequisite furniture along with a sitting area, if desired. Sliding glass doors open to a private outdoor brick patio.

Two large walk-in custom closets sit across from the large, luxurious and light-filled en suite bathroom. Honed statuary marble tile adorns the floor (with radiant heat) and shower walls. The double vanity is custom built with flat panel cabinetry by Crown Point and a Carrara marble countertop. The two mirrored medicine cabinets sit over the twin sinks, edged by three pretty sconces.

The shower is large and offers three Grohe Allure showerheads. The toilet is a wall-mounted Duravit Starck 3 with a soft close seat.

The two other bedrooms are also sizable. The larger bedroom carves out an alcove adorned with three high windows and a low shelf and has two large closets. The interior bedroom has one large closet.

The shared bathroom features a Carrara marble countertop with custom cabinetry and an oval undermount sink. Honed statuary marble tile adorns the floor (with radiant heat) and the oversized shower walls.

A laundry closet contains a stackable Maytag washer and dryer, and a large hall closet offers additional storage.

Other perks include a generous allowance and selection of special features to be installed by the seller: choice of dining and family room chandeliers; $2,000 for a mantle/hearth for the 36-inch gas fireplaces and $5,000 for custom shelving in the master walk-in closets.

The developer for the 67 St. Botolph St. project is Mainsail Management, Inc. They have been developing and managing fine luxury properties for more than 30 years throughout the Back Bay, Beacon Hill, South End and Brighton.

The architect team comes from the Grassi Design Group. This architectural firm was founded in 1981 and specializes in single-family and vacation homes, multi-family developments, boutique commercial and resort development.

This magnificent home is ideal for families, empty nesters or working couples, those who are rightsizing (also called “downsizing”) away from the big suburban homes, those who want to avoid the long and tedious commute to work and for those who have a deep desire to enjoy all that this great city has to offer.

Residents who live on Saint Botolph Street can enjoy the outdoor beauty and tranquility along with fun and exercise at the nearby expansive Southwest Corridor and Follen Garden, the Harcourt/West Canton Garden, Braddock Park Garden, Carleton Street Playground and the Carleton Square Dog Park.

Saint Botolph Street is part of a historic residential district, nestled in the picture-perfect Back Bay bordered by the culturally diverse South End. Prominent architectural 19th century landmarks such as The Old South Church, Trinity Church and the Boston Public Library can be found in nearby Copley Square.

Old warehouses have been transformed into the galleries, studios and home-décor shops collectively known as the SoWa Art & Design District in the South End.

The area is loaded with a variety of eating establishments and stores to meet every type of palate imaginable. Many restaurants and shops can be found at the Prudential Center and Copley Place as well as on Boylston and Newbury streets, all just a short walk from home. The South End is noted for its popular family-friendly bistros and trendy eateries.

67 St. Botolph St. has convenient access to public transportation as well as major highways such as Storrow Drive and Route 93.

There will be an open house from 11:30 a.m. to 1 p.m. on Sunday, Feb. 10.