Outdoor Fireplace Construction Cost in 2026: What to Expect

A prefab outdoor fireplace insert with a simple stone surround can be built for $2,000-$5,000. A fully custom masonry fireplace built by a skilled mason from scratch costs $6,000-$20,000+. The custom option lasts longer, integrates better with your design, and holds up better to weather, but the prefab option is a legitimate and popular choice.

Wood-burning outdoor fireplaces require a chimney that meets code height requirements (typically 2 feet above any structure within 10 feet). Gas units need a gas line connection ($300-$1,000) and a gas insert or burner ($400-$1,500). Gas is more convenient and often preferred in urban and suburban areas. Some areas restrict wood burning outdoors.

The chimney must be tall enough for proper draft and to meet code. A simple prefab chimney extension costs $200-$500. A full masonry chimney adds $1,500-$5,000 to the project cost. Taller fireplaces and those on covered patios require careful chimney design to vent properly without smoking out the seating area.

An outdoor fireplace needs a proper concrete footing, especially in climates with frost. A simple poured footing costs $300-$800. Adding a raised hearth with paver or stone extension costs $500-$2,000. The hearth extension is both functional (ember containment) and aesthetic.

A standalone fireplace is less expensive than one that is part of an outdoor kitchen or covered patio structure. Adding a pergola or roof structure over the fireplace costs $3,000-$15,000. Integrating with an outdoor kitchen adds $5,000-$15,000. The fireplace itself may be only a fraction of a larger project's cost.

“What permits are required for this outdoor fireplace?”

Why this matters: Most jurisdictions require building permits for permanent masonry structures and gas line work. Some also have burn restrictions that would affect what type of fuel you can use.

“What size footing do you plan for this fireplace, and why?”

Why this matters: An outdoor fireplace can weigh several tons. The footing must extend below the frost line in cold climates and be sized for the load. A contractor who does not discuss the footing is not thinking about long-term durability.

“How will you handle chimney height to prevent smoking?”

Why this matters: An outdoor fireplace that smokes in your seating area is a major problem. The chimney must be tall enough relative to any overhead structure and sized correctly for proper draft. Ask how they calculate this.

“What is your experience with outdoor masonry in this climate?”

Why this matters: Outdoor masonry in cold climates must use materials and mortar rated for freeze-thaw cycles. Indoor masonry experience does not directly translate. Ask for examples of outdoor fireplaces they have built in similar climates.

“Is the firebox lined with fire-rated refractory materials?”

Why this matters: The firebox interior - the area that contacts fire directly - must be lined with firebrick and refractory mortar, not standard brick and mortar. This is a basic safety and longevity requirement.