These aren’t usually measured by square feet but should still be included in the overall budget as a standard cost. The last aspect of an addition’s budget to consider is the utilities that power the house, such as electrical, water and HVAC hookups.Located in the heart of Chapel Hill, less than 0.1 miles from UNC at the intersection of Columbia and Franklin, Carolina Square encompasses a mixed set of uses including 42,000 rsf Retail, 159,000 rsf Class A Office, and 246 Apartment units. Vibrant Mixed-Use Square on Franklin Street in Downtown Chapel Hill Now Open.