Harrington IV 2008 sq ft | 4 bdrm | 2.5 bath | Click for Harrington IV HS162A Brochure Here is a Harrington IV we built in Alden, NY. The additional bonus room can be done in a variety of ways. We can make it a sunken living room, add french doors for more separation, add a fireplace, or just leave it open. rendering 1st floor. ~You’ll see the optional bonus /family room on the left. Selecting this would increase the size of the house to 2372 sf. 2nd floor layout ~Standard attic access is a hatch in either the hallway or one of the closets. But depending on the roof line, the optional attic stairs off of bedroom 3 would allow for more space in the attic that could be finished by us, when we build, or by you, for a fun future project. Get Started!