A lamp may have ignited the 9:30 a.m. blaze in the Martinsville section of the township, fire officials said.
Heavy smoke billowed from the 7 Krams Trail home as fire crews from several surrounding towns arrived.
The home was deemed uninhabitable after the blaze was under control, around 2:45 p.m., officials said.
Crews from Bound Brook, Green Knoll, Finderne, Liberty Corner, Martinsville, North Branch, Somerset County and Warren responded. Paramedics from Bradley Gardens, Martinsville and Somerville were on scene.
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