The double-sloped or "mansard" roof is a signature feature of the Second Empire house. Tall first-story windows, classical pediments, and a narrow stature are characteristic also.

The façade often features brick or stone. Ornamental touches on the roof may include patterned slate and cupolas. Balconies are a common decoration of the Second Empire house.

• Double-sloped roofs
• Balconies
• Tall, narrow windows