While chic and sophisticated, the design addresses daily needs with flair and fun in a comfortable and inviting environment. Outstanding amenities, both inside and out, are a bonus.

All the telltale signs indicate this is a classic 19th century South End townhouse: wrought iron gate, granite steps, ornate hooded entry and a two-window bow front on all levels.

However, one detail at 11 Rutland Square – Yves Klein Blue double front doors – hints that there are other special, yet non-conforming qualities beyond the entry.

What awaits is a five-story, fully renovated 4,339 square-foot single-family residence with the innate elegance of this 1860 gem infused with a contemporary aesthetic designed for every aspect of city living, formal entertaining and today’s lifestyles.

While chic and sophisticated, the design addresses daily needs with flair and fun in a comfortable and inviting environment. Outstanding amenities, both inside and out, are a bonus.

“Push-button” technology is one, thanks to a Savant Home Automation control system that includes programmed Savant motorized shades. Three of the bedrooms have two-option sheer and blackout modes. Pressing a button opens the front door and the garage door, turns off the lights on every floor and controls the six-zone heating/cooling system.

All of the controls can be handled by phone, including the locks and garage doors. Controlling indoor and outdoor audio anywhere throughout this home is just as easy with the Savant AV integrated system.

Technology, convenience and the unexpected co-exist wonderfully in the elevator that goes to all floors. The glass door and interior side panels reveal the building’s innards as it travels from floor to floor.

The gleaming seven-inch wide expresso-toned white oak flooring streaming throughout the home is a dramatic, seamless backdrop that complements the overall clean line design and showcases the glamorous floating glass staircase and gallery-like spaces.

The bow front with two curved and arched windows anchor the open-concept first floor that encompasses a wide living room that accommodates seating in various configurations.

The chef’s kitchen is equally spectacular in looks as well as function. An abundance of white high gloss Leicht cabinetry and quartz countertops with under-mount lighting is accented with a symphony of stainless-steel appliances. This work of art is comprised of a Gaggenau five-burner gas cooktop and three ovens (including a micro-steam convention oven and convection microwave oven), a dishwasher, an integrated panel-front Sub-Zero refrigerator, a 55-bottle Sub-Zero wine refrigerator and beverage drawers.

The center island is a magnificent example of skilled craftsmanship. The marble countertop in a seamless waterfall edge was custom made and imported from Turkey. This oversized prep/breakfast bar seats five people comfortably. The design/decor was not overlooked either: the base under the marble top matches the blue on the front door. Likewise, every floor has touches of that same color.

An informal dining area for four to six people is adjacent to a wall of full glass sliders that open to a private deck with sufficient space for a bistro table, chairs and a grilling station. Permanent planters have their own irrigation system.

In many ways, the multi-purpose garden level – suitable for guests, in-laws or an au pair – reflects the overall design philosophy for this home: luxurious, modern, stylish and most of all, functional. The front bedroom suite has a pocket door to a large closet.

The marble en suite bathroom features a floating vanity and glass-enclosed shower. Even the mudroom has an elegant look with more than four feet of almost floor-to-ceiling, flush-mounted Leicht cabinetry in a white glossy finish similar to the kitchen cabinetry. A built-in bench is handy. Laundry facilities are directly opposite.

In addition to the utility room that also has the expresso flooring, regulation basement space is available as is direct access to the garage.

The two-car heated garage that can handle SUVs is attractive, too. The floor is painted and natural light flows in through frosted glass “windows” in the door. The driveway, with space for two more vehicles, has a snow melt system.

On the second floor, barn door sliders reveal a step-down media/family room with built-in wrap-around seating and a Bowers and Wilkins surround-sound system. A flush-mount linear gas fireplace under a television provides indoor visuals while full glass sliders to a balcony offer outdoor vistas. Permanent planters add dashes of color.

Another wing on this level hosts a spacious bow-windowed bedroom suite with a walk-in California closet. The Jack ’n Jill bathroom features a floating vanity, tub/shower ensemble and glass barn door sliders.

Encompassing the entire third-floor is the primary suite - an exceptional space accompanied by dual wardrobe rooms, accessorized with custom MisuraEmme Italian fittings that take the phrase “a place for everything” to whole new levels. A nearby laundry closet is conveniently placed to keep clothes and linens clean and fresh.

The bow front sitting area in the colossal sleeping chamber is a peaceful oasis while the spa-inspired en suite bathroom is pure luxury.

The massive steam shower in a glass enclosure has five showerheads (one is mounted on the ceiling) and a built-in bench. Radiant heated flooring is certainly a most-appreciated sensuous amenity; windows with automatic (touch of a button) privacy glass over the free-standing slipper soaking tub are a practical one. Floating dual vanities and the separate Toto water closet allow for personal space.

The top floor also reflects the emphasis on functional living spaces that meet today’s needs and desires, albeit with style.

Two bedrooms with lighted custom closets (one is a double and the other a single) and charming hooded and arched windows share a full bathroom with a step-in shower in a frameless glass enclosure and radiant-heated floors. The blue tile surround is an attractive nod to those great front doors. These rooms could be used as an office, gym, hobby room or nursery.

A spacious family room shares this level, too. The built-in wet bar highlights a square sink in a marble counter with a waterfall edge and Leicht cabinetry. A striking gas fireplace is an indoor focal point while views of Back Bay via almost floor-to-ceiling windows are outdoor attractions.

A full staircase leads to an exceptionally functional roof deck. In addition to a hard-piped, built-in gas grill, this urban escape has an outdoor kitchen that includes a refrigerator and prep sink. Permanent planters have their own irrigation system. The views of the Boston skyline are phenomenal.

For a personal showing of this utterly unique and urbane townhome set in the picturesque tree-lined Rutland Square, listed at $6,445,000, contact Allison Mazer of Compass.