Custom Fireplaces in Duluth, MN

Stone fireplace under construction in a wood-paneled room. Scaffolding, buckets, and stone pieces are visible.
Stone fireplace in a wood-paneled room. Firebox has a black interior. Two windows flank the fireplace.

Add Warmth and Beauty With a Custom Fireplace

A fireplace is more than a heat source—it’s a centerpiece that defines your space. At Stone Forge LLC, we design and build fully custom fireplaces that bring warmth, texture, and architectural character to both indoor and outdoor living areas.


We work with a wide range of premium finishes and materials—including natural stone, veneer, brick, tile, barnwood, stucco, and corten steel—to create fireplaces that match your style and elevate your home. Every build is designed for performance, durability, and visual impact.

Indoor & Outdoor Fireplace Construction

We provide complete design and installation services for fireplaces in both interior and exterior environments. From concept to completion, we handle layout, framing, material selection, installation, and finishing.

Indoor Fireplaces

Transform your living room, basement, or great room with a custom indoor fireplace tailored to your home’s design. Whether you prefer a rustic, modern, or transitional look, we build fireplaces that blend seamlessly with your interior architecture.


We install:

  • Wood-burning and gas-ready fireboxes
  • Stone, tile, stucco, or veneer surrounds
  • Barnwood mantels and custom wood accents
  • Floor-to-ceiling feature walls
  • Built-in hearths and seating elements
  • New construction and remodel integrations


Each fireplace is carefully designed for proper venting, safety compliance, and long-term performance.

Outdoor Fireplaces

Extend your living space outdoors with a durable, weather-resistant custom fireplace. Outdoor fireplaces create a natural gathering place for year-round enjoyment and add value to your property.


Popular features include:

  • Wood-burning or gas fireboxes
  • Stone, stucco, or brick exteriors
  • Corten steel modern fireplace designs
  • Built-in wood storage and seating walls
  • Covered patio and pavilion installations
  • Integration with outdoor kitchens and fire pits


Every outdoor fireplace is built to withstand Minnesota’s freeze-thaw cycles, moisture, and seasonal temperature shifts.

Materials & Finish Options

We offer a wide variety of materials and design finishes to match any architectural style, including:

  • Natural stone (fieldstone, limestone, granite, etc.)
  • Manufactured stone veneer
  • Ceramic, porcelain, and natural tile systems
  • Barnwood and reclaimed wood mantels
  • Stucco and smooth plaster finishes
  • Corten steel modern fireplace cladding
  • Brick and traditional masonry finishes


Each fireplace is engineered with proper structural support, heat-rated materials, and professional installation methods to ensure safety and longevity.

Our Fireplace Installation Process

  1. Design Consultation – We discuss your vision, space, and functional needs.
  2. Site Evaluation & Planning – We assess structure, venting, and installation requirements.
  3. Material Selection – Choose from a curated selection of finishes and textures.
  4. Construction & Installation – Our team builds your fireplace from frame to finish with precision.
  5. Final Walkthrough – We review every detail to ensure quality and satisfaction.

Why Choose Stone Forge LLC

With over 20 years of masonry and construction experience in the Duluth area, we build fireplaces that combine craftsmanship, design, and long-term durability.


Clients choose us for:

  • Fully custom fireplace design solutions
  • Expertise in multiple finish systems and materials
  • Clean, professional job sites
  • Seamless integration with home architecture
  • Reliable scheduling and transparent pricing
  • Proven local reputation for quality work


We don’t just build fireplaces—we design focal points that define your home.

Living room with a stone fireplace, dark ceiling fan, tall windows, and a staircase.

Ready to Build Your Fireplace?

A custom fireplace is an investment in comfort, beauty, and resale value. Let Stone Forge help you design and build a feature that makes your space warmer—inside or out.