The first fire was discovered Monday morning around 6:04 a.m. while an officer was patrolling the Summerlyn subdivision.
When the fire department arrived, the house at 102 Rolling Meadows Drive was had flames coming out of the roof. Firefighters were able to extinguish the blaze, but the home suffered significant damage.
Another home on that street, 116 Rolling Meadows Dr., was damaged in a separate incident. Police say it appeared as if someone had entered the property, which also is under construction, and tried to set a fire inside it. That home suffered minor damage.
The homes are owned and built by Savvy Homes in Raleigh.
The State Bureau of Investigation is assisting the Clayton Police Department and the Clayton fire marshal with the investigation.
Anyone that may have seen any suspicious vehicles or persons in the area between 4:30 to 6:00 a.m. on Monday (or have any information about the fire) is asked to call the Clayton Police Department at 919-553-4611 or Clayton Crime Stoppers at 919-359-TIPZ (8479). A reward is available for confidential information that leads to an arrest.