All districts
The zoning ordinance handles signs by reference: all signs must conform to the applicable City codes and, where required, be reviewed and approved by the Community Development Department with a permit issued (Section 5.6). The substantive sign rules live in Chapter 28 (Sections 28-1 through 28-16) of the Novi Code of Ordinances, last comprehensively updated September 13, 2021.
Key points from Chapter 28 and the city's sign program: permanent signs and banners require a sign permit; signs over 1 square foot generally need a permit, while address signs under 4 square feet do not; ground signs must be monument style with no exposed posts; no sign, permanent or temporary, may be placed in a public right-of-way; and temporary signs are limited in duration, height, area, and number. Because the per-district size and height schedules sit in Chapter 28 rather than the zoning ordinance, confirm your specific sign allowance with Code Compliance at 248-735-5678 before ordering a sign.