What can I build on this property?

It depends on the zoning district. Apex's Unified Development Ordinance (UDO) establishes zoning districts under Sec. 3.2 (the section's own intro text says 39, though counting every listed district and sub-district in Secs. 3.2.1-3.2.9 totals 40; this pack lists all of them either way): nine base residential districts (RA, RR, LD, MD, HDSF, HDMF, MH, MHP, MORR), six business districts (O&I, B1, B2, B3, PC, TF), two industrial districts (LI, HI), the Conservation Buffer (CB) district, four types of Conditional Zoning planned-development districts (MEC-CZ, TND-CZ, PUD-CZ, SD-CZ), and Conditional Zoning counterparts to most base districts. The citywide Use Table (Sec. 4.2.2) lists every use type against every district as permitted by-right (P), a special use needing Board of Adjustment approval (S), allowed as a percentage of gross floor area (%), or not allowed (blank). This pack covers Apex's corporate limits and its extraterritorial jurisdiction (ETJ), which Apex actively zones under Sec. 1.4.1 (except a small area under a 1969 agreement assigning it to the Town of Cary). Start by confirming the zoning district on the town's zoning map or with Planning and Community Development at 919-249-3426.