Welcome home to this expanded, beautifully maintained oversized Hip Roof ranch, offering a rare and highly versatile 4 bedroom, 2 full bath, 2 stall garage (and additional parking for RV/Boat/Snowmobile Trailer, etc. 2nd driveway), layout that is absolutely perfect for an in-law or au-pair setup. Nestled in one of Nashua's most convenient neighborhoods, this single-level property boasts a gorgeous rear sunroom with sliding glass doors that overlook a large, fenced backyard with lawn irrigation, ideal for outdoor entertaining and play. The home's footprint continues down into a massive basement featuring 448 sq. ft. of finished bonus space, perfect for a home office, gym, or media room, plus an additional 896 sq. ft. of unfinished space reserved for all your storage or future expansion needs. Complete with a commuter-friendly location right off Main Dunstable Road with lightning-fast access to Route 3, and situated just a short 0.2-mile stroll from the Fairgrounds schools, 42 Caldwell Road offers the ultimate blend of multi-generational functionality, space, and a premium Nashua location. Come and enjoy all the recent updates, roof, heat, central air, and more! Do not let this one get away. One floor living at it's finest.