1740 Argonne Drive delivers the space, setting, and convenience buyers hope for but rarely find - 5-bedrooms and 3-bathrooms on a huge lot at the Concord/Walnut Creek border, and on the market for the very first time. This lovingly owned home has been meticulously cared-for and thoughtfully updated over the years, offering a rare blend of comfort and flexibility in a highly sought-after location. Light-filled living areas and a functional, easy-flow floor plan make everyday living and entertaining a breeze. Recent improvements include updated flooring, dual-pane windows, fresh interior paint, and other tasteful upgrades that create a clean, move-in ready feel. With 5 well-sized bedrooms and 3 full bathrooms, there is room for everyone, plus excellent options for a home office, guests, or multigenerational living. Set on an expansive lot at the end of a quiet cul-de-sac, this property offers a peaceful setting with room to play, garden, entertain, or plan future outdoor projects. All of this, just minutes from Walnut Creek's shopping, dining, parks, BART, and major commute routes - a special opportunity to own a beautifully maintained home in a prime location!