Beautiful post and beam home set on 1.25 well-kept acres with a four-car garage and separate in-law apartment. Welcome to 23 Bonnie Lane, Union, a 3 bedroom, 3 full bath property offering three levels of living, entertaining and enjoyment. Warm wood beams and cathedral ceilings create timeless character throughout the main house. The open concept kitchen and dining area flow into a step-down living room featuring a woodstove with brick hearth and chimney. The spacious main floor primary bedroom is bright and inviting, enhanced by recently added transom windows and an ensuite bath with tile shower and double vanity. A guest bedroom with beamed ceiling and built-ins, full hall bath and convenient first-floor laundry complete the main level. The second floor suite offers a kitchenette, desk area, generous sleeping space and full bath. The finished basement provides additional entertaining space with v-match finishes and a dedicated gym area. A mudroom connects to four heated garage bays with heat pumps and automatic openers for year-round comfort. Above the garage, a fully equipped in-law apartment includes a full kitchen with dishwasher, heat pump, full bath, laundry and private balcony. Outside, enjoy a fenced yard, paved driveway, large deck and a 16-person swim spa with pergola, plus wood and tractor sheds. Conveniently located just 20 minutes to Camden or Rockland and under an hour to Augusta. Several freshwater ponds and lakes are nearby, along with abundant opportunities for fishing, hiking and outdoor recreation. Virtual tour available.