Park Slope's Best Penthouse!This unique full-floor, 2,298 sqft 4 bedroom, 3 bath residence is unlike anything else in this prime neighborhood. With elevator access directly into the unit, you will be blown away by its open, lofty feel the moment you step into the spacious living/dining room. Sun beams in through the floor-to-ceiling glass windows, and with more than 1,500 sqft of private outdoor space, the penthouse offers dazzling views and a perfect setting for entertaining.A state-of-the-art Lutron home automation system allows remote heating, lighting and shade control on any computer, smartphone or tablet in the world. The open kitchen includes Bauformat German-made kitchen cabinets, Sub-Zero and Wolf stainless steel appliances, a wine cooler, and a Miele coffeemaker. Wide plank, rift & quartered white oak floors provide an elegant touch. The bathrooms include fixtures by Duravit, a DXV smart toilet as well as floor-to-ceiling tiles throughout.The apartment's East wing includes a large guest bedroom, spacious laundry room and guest bathroom. The south-facing master bedroom includes an en suite master bathroom and walk-in closet. Each bedroom has direct access to one of 3 terraces. The Western wing features two more bedrooms, an additional guest bathroom and a private staircase leading to an incredible landscaped roof deck outfitted with full kitchen hookups. Built to the highest level of expertise, the building features a geothermal cooling system, an integrated water filtration system, a high-efficiency heating system and spray foam insulation for maximum heating/cooling retention. A private, storage room is also included with the purchase. Conveniently located in the heart of Park Slope, 277 1st Street is just steps away from all the shops and restaurants along 5th and 7th Avenue and a quick stroll to Whole Foods on 3rd Street and 3rd Ave.  J.J. Byrne and Prospect parks, which host farmers markets every weekend, are both within easy walking distance. Transportation is also only a few blocks away, including the R train at Union St and Atlantic Terminal/Barclays Center, where you will find nine transit lines and the LIRRDon't miss out on this one-of-a-kind gem.