Built in 1885, the three-residence building at 312 Bunker Hill St. in Charlestown has remained true to its origins, at least in spirit. The old-world character of the building has been retained, yet the interior of the units have been completely transformed.

In 2018, the units were meticulously renovated by a highly respected developer and the results are simply marvelous. These beautiful, luxurious and flawless contemporary homes are listed by Frank Celeste of Gibson Sotheby’s International Realty and awaiting new residents – which one is calling you home?

Unit 1 is a 2,169-square-foot duplex boasting four bedrooms with en suite bathrooms and a powder room listed for $1,549,000. While Unit 2, listed for $1,049,000, enjoys 1,354 square feet of treasured space, Unit 3, listed for $1,179,000, spans 1,495 square feet of ultimate penthouse living. Each unit features two bedrooms with en suite bathrooms plus a powder room.

“Charming” tends to be the initial reaction once inside the shared vestibule. Natural light streaming through a custom stained glass window accentuates the original raised paneling (it’s at least five-feet high) that sits above the four-foot-high bead board wainscoting, a reflection of the superb craftsmanship of the 19th century.

While the original doorbells complete with speaker tubes in the entry are delightful reminders of earlier technology, what’s beyond the inner door is pure 21st century right from the get-go. These homes are all sporting a Smart Home System by Building 36.

Clean, simple lines of the millwork, such as six-paneled doors (these are squares) and deep bump boards that are over an inch-wide sans trim, are complemented by deluxe fixtures and features. The result is an understated, sophisticated and elegant ambiance.

All three units are modern, light and airy with a fully open-concept living-dining room and kitchen – great for entertaining. The dining areas can easily seat six or more.

The solid white oak flooring in a natural finish found throughout the homes establishes a cohesive look as it continues on the treads of the main staircase.

Other shared factors are custom Pella two-over-two windows with marvelous views of the Boston skyline and high ceilings with an abundance of recessed lighting. Stainless steel Jenn-Air appliances, including five/six burner gas ranges; Electrolux full-size, stackable washers and dryers; Toto commodes and Grohe fixtures, are a few other common elements in the units.

One of the most memorable and beautiful mutual features, however, is the large center island with blue-sky marble countertop in a waterfall layout in each kitchen. The wide overhang seats four comfortably. Each island has an integrated microwave oven, too. The same waterfall effect is used on the blue-sky marble countertop against the wall accented with a honed marble tile backsplash.

Amidst all these commonalities, each residence has a distinct look and personality. The kitchens are an excellent example of this uniqueness. Although each kitchen has gull wing upper cabinetry, decorative finishes vary.

In the Unit 1 duplex, light gray/brown finishes are on the upper cupboards with gun metal blue on base cabinets and on the island. In the spacious dining alcove, a sideboard/credenza that is almost 10-feet long has the blue-sky marble top and gunmetal blue base.

In Unit 3, base cabinets are dove-gray and the gull wing doors are light brown/gray. The dining area credenza/sideboard boasts the blue-sky marble top, but the base bears a nine-drawer unit with a birch-like base.

Unit 2 also has a distinctive look. Here, birch-like base cabinetry and white gull wing door uppers complement each other. A nine-drawer server/sideboard is in the dining area.

Be they en suite or half bathrooms, these loos are classy and stunning. Each half bathroom has a pocket door, and floating vanities are in every one, but like the kitchen, no two are alike. Some have drawers, others have cabinets, and the overhead mirror frames are all different, too. In the master bathroom in the duplex, that frame is illuminated.

Each step-in shower has a frameless glass door and multiple body sprays. Stone and ceramic tiles are the finishing materials, but each one is installed in a unique combination with a dash of the unexpected somewhere in the room. The back of the product niche, for example, has everything from glass tile to ceramic tile forming interesting designs. Every ceramic tile floor has a unique pattern and even the tile surrounds manage to contrast yet complement the overall decor.

Although each bedroom is large and bright and fits a king-size bed comfortably, the master bedrooms in Units Two and Three have a special feature: a broad three-window bay overlooking the street.

Incidentally, every single light fixture from wall scones to pendant lights over the kitchen island is different, as well.

Closet needs have been considered, too. First, they are all lighted; second, these storage spaces will be customized to the owner’s preferences. In case you wondered, linen closets will receive the same kind of personal attention as all the others.

A window wall (full glass pane sliders with matching sidelights) in each of the units leads to individual outdoor spaces. Two upper units have private balconies while the duplex has an old-fashioned porch-like deck with steps to a private, fully fenced bluestone patio that is piped for gas and has direct access to the street.

These three homes at 312 Bunker Hill come with a bonus. Besides their private decks, residents have access to a large common roof deck (it could be one of the highest in Charlestown) with an incredible 360-degree view that stretches from the Tobin Bridge to Cambridge and beyond. During the Fourth of July holiday season, fireworks displays on the Charles River and in surrounding towns along the Fells Connector Parkways light up the night sky.

Accessing the roof is easy, too. A “real” staircase that is also wide leads to the deck via a compression hatch door that is easy to open and close. On another practical note, the roof deck already has its own gas line.

Charlestown, founded in 1629, is vibrant and fashionable neighborhood full of history, culture and livelihood, a haven for young professionals and families – a close-knit community with a home-town feel. While there are plenty of places to eat, drink and be merry, the Charlestown Harborwalk provides magnificent waterfront views as well as parks and green spaces to relax and rejuvenate. A quick ferry ride, public transportation and personal vehicles can take you to further destinations, as well.