Welcome to 12 E Summit Drive, a custom-built Mummert home and rare opportunity in the highly desirable Mayer's Summit community of Littlestown, PA-just over the Mason-Dixon Line from Westminster, MD! Set on nearly an acre, this spacious home offers privacy, a versatile floor plan and major recent improvements, including a new architectural shingle roof (Aug 2026), new carpet & well pump (September 2026), and HVAC (2023). A whole-house Generac generator and quality 2x6 construction add peace of mind. A standout feature is the beautiful, completely level backyard, surrounded by mature trees & landscaping for total privacy. The conventional septic system - a rarity w/in Mayer's Summit - provides a flat, usable yard w/tons of space to enjoy. Inside, the dramatic 2-story Great Room features a gas fireplace, soaring ceiling and clerestory windows. Hardwood flooring extends throughout much of the main level, complemented by new carpeting. The spacious kitchen features granite countertops and stainless steel appliances, while the formal dining room offers a tray ceiling and oversized window for an abundance of natural light. The main-level master bedroom ensuite features a vaulted ceiling, inlaid hardwood flooring as well as his & hers walk-in closets. The vaulted master bath includes a double vanity, soaking tub & walk-in shower. Upstairs features two additional bedrooms plus a huge bonus room with potential for a fourth bedroom and spacious walk-in closet. Bedroom #2 offers the convenience of dual access to the full hall bath. The huge unfinished basement offers lots of storage and an abundance of future living space, plus a 2nd laundry area with utility sink and washer/dryer. A main-level laundry room with utility sink is conveniently located between the kitchen and two-car side-entry garage. With its private, nearly acre lot, main-level primary suite, flexible living space and substantial recent updates, homes like this in Mayer's Summit don't come available often!