How To Build A Fireplace: A Step-By-Step Guide To Building Your Dream Fireplace

Last Updated February 23, 2021 By Bella Zinti

There's something undeniably magical about a crackling fire on a chilly winter evening. The dancing flames cast a warm, inviting glow that not only heats the room but also warms our hearts. It's no wonder that fireplaces have been a cherished addition to homes for centuries, providing both practical warmth and a sense of comfort.

If you've ever dreamed of having a fireplace in your home, you're not alone. Building a fireplace is a rewarding project that not only enhances the aesthetics of your living space but also creates a cozy atmosphere perfect for relaxation and gathering with loved ones. Whether you're a seasoned DIY enthusiast or a first-time home improvement adventurer, this comprehensive guide will walk you through the process of how to build a fireplace from start to finish.

What Is A Fireplace

A fireplace is a functional and decorative architectural feature that provides heat and ambiance within a living space. Typically constructed with a firebox, chimney, and hearth, it serves as a controlled source of open flame, using wood, gas, or other fuels to generate warmth and emit a comforting, flickering light. Fireplaces come in various styles, from traditional brick or stone hearths to modern, sleek designs, and they have been a central element of homes for centuries, offering a sense of coziness, relaxation and a focal point for gatherings during cold seasons. They are both practical and aesthetic, adding character and comfort to any room.

What You Need To Consider Before Building An Indoor Fireplace

Type of Fireplace

The type of fireplace you choose will significantly impact your experience. Wood-burning fireplaces (traditional fireplaces) offer a traditional, rustic feel but require a constant supply of firewood and regular maintenance. Gas fireplaces are more convenient and efficient but may require a gas line installation. Electric fireplaces are low-maintenance and can be installed almost anywhere, but they may not provide the same authentic ambiance as a real flame.


The fireplace's placement within your home is pivotal. It should not only align with your design vision but also adhere to safety and building regulations. Ensure that there's sufficient clearance from combustibles like walls, curtains, and furniture. Also, consider how the fireplace will fit into the overall layout of the room and how it will interact with other elements like windows and doors.


Setting a budget early on is essential. It's not just about the cost of materials and labor for construction; you should also factor in ongoing expenses such as fuel, maintenance, and potential repairs. Make sure your budget is realistic and accounts for unforeseen expenses.

The cost of building a fireplace can vary widely depending on several factors, including the type of fireplace you choose, the materials used, labor costs in your area, and any additional features or customizations you want. Here's a rough estimate of the costs associated with different types of fireplaces:

Wood-Burning Fireplace

Basic Prefabricated Fireplace: $1,500 - $3,000 (excluding installation)

Custom-Built Masonry Fireplace: $7,000 - $20,000 or more (including installation)

Annual wood fuel costs: $300 - $1,000 or more

Gas Fireplace

Basic Fireplace Insert: $2,500 - $4,000 (including installation)

Custom-Built fireplace: $5,000 - $10,000 or more (including installation)

Natural gas or propane fuel costs: Varies depending on usage

Electric Fireplace

Wall-Mounted Electric Fireplace: $200 - $1,000+

Electric fireplace Insert: $500 - $2,000+

Freestanding Electric Fireplace: $500 - $2,500+

Electricity costs: Varies depending on usage

Keep in mind that these are rough estimates and that costs can vary significantly based on factors such as the complexity of the installation, the choice of materials (e.g., stone, brick, tile), the need for a chimney or venting system, and any additional features like mantels or surrounds.

Permits and Regulations

Building codes and regulations can vary by location. Research local requirements, including permits and safety standards, to ensure your fireplace project complies with the law. Failure to do so could result in costly fines and safety hazards.

Fuel Source

If you opt for a wood-burning fireplace, consider your access to a reliable, sustainable source of firewood. Gas and electric fireplaces rely on utility services, so ensure they are available and easily accessible in your area.

Design and Aesthetics

Your fireplace should harmonize with your home's overall design and style. Consider materials, finishes, and architectural details that complement your decor. Whether you prefer a traditional, rustic, modern, or minimalist look, choose elements that resonate with your personal taste.

Ventilation and Chimney

Proper ventilation is critical for the safe operation of your fireplace. Ensure that your fireplace design includes proper airflow and that the chimney is correctly sized and constructed according to local regulations. A well-constructed chimney not only aids in ventilation but also prevents smoke and toxins from entering your home.

Safety Features

Safety should always be a priority. Install safety measures such as screens or glass doors to prevent sparks from escaping. If you have children or pets, consider additional safety gates or barriers to keep them away from the hot surfaces.

Heat Distribution

Think about how the heat generated by your fireplace will circulate throughout the room. Some fireplaces may require the installation of fans or vents to ensure that warmth is distributed effectively.


Different fireplace types have varying maintenance needs. Wood-burning fireplaces demand regular cleaning and chimney inspections to prevent creosote buildup. Gas and electric models may require less maintenance, but they should still be inspected periodically to ensure they are in proper working condition.

Professional Help

While DIY projects can be satisfying, fireplace installation is best left to experienced professionals. Hiring experts ensure the fireplace is installed correctly, adhering to safety standards and local regulations.

Environmental Impact

Be mindful of the environmental impact of your choice. Wood-burning fireplaces emit carbon emissions, contributing to air pollution and deforestation. Gas and electric options may have a lower environmental footprint but may still have an impact depending on the energy source.

How to build an electric fireplace

Unlike building a traditional fireplace, building an electric fireplace is a practical and relatively straightforward DIY project that can add warmth and ambiance to your home without the complexities of constructing a traditional wood-burning or gas fireplace. Here's a step-by-step guide on how to build an electric fireplace:

Materials You'll Need

Electric insert

Plywood or MDF (medium-density fiberboard)


Wood glue

Brad nailer or hammer and nails

Paint or stain (optional)

Mantel and surround (optional)

Tools You'll Need

Measuring tape

Saw (circular saw or jigsaw)





Paintbrushes (if painting or staining)

1. Design and Planning

Careful planning is the foundation of a successful electric fireplace project. Start by selecting the ideal location for your fireplace. This should be a spot where you can enjoy its ambiance, and it must have access to a nearby electrical outlet. Take precise space measurements to determine the appropriate dimensions for your fireplace.

If you plan to install your fireplace wall on an existing wall that lacks an electrical circuit, it's essential to enlist the services of an electrician. They will be responsible for setting up a dedicated circuit before you can commence with your project.

2. Frame Construction

Once you've settled on the location and dimensions, it's time to construct the frame for your electric fireplace. You can use plywood or MDF (medium-density fiberboard) for this purpose. Measure and cut pieces to create the back panel and side panels of the frame. Ensure that the frame is sturdy and square, as it will support the weight of the fireplace insert and any additional components.

Assemble the frame by attaching the pieces together using screws and wood glue. Pre-drill holes to prevent wood splitting, and countersink the screws for a clean finish. Make sure the frame is level and securely fastened.

3. Cutout for the Insert

Measure the exact dimensions of your chosen electric insert. The insert should match the rough opening dimensions and fit snugly within the frame to create a seamless look.

Using these measurements, mark the dimensions on the front panel of your frame. Use a jigsaw or circular saw to cut out the opening for the electric fireplace insert carefully. Take your time to make precise cuts, ensuring that the opening is clean and fits the insert perfectly.

4. Finishing the Frame

After cutting the opening, sand the edges and surfaces of the frame to remove any rough spots or imperfections. This step ensures a polished and professional appearance.

If you desire a specific color or finish for your fireplace frame, you can paint or stain it to match your room's decor. Choose a paint or stain that complements your interior design style. Apply multiple coats if needed and allow ample drying time between coats for a smooth and even finish.

5. Install the Electric Fireplace Insert

Place the fireplace insert carefully into the cutout you created in the front panel of the frame. Follow the manufacturer's instructions for installation, as the process can vary depending on the model.

Typically, electric fireplace inserts come with mounting brackets or other hardware to secure them to the frame. Ensure that the insert is securely fastened and aligned within the opening.

6. Mantel and Surround (Optional)

If you wish to enhance the aesthetics of your fireplace, you can add a mantel and surround. These elements can be attached to the frame using screws or a nailer. Be sure to level and secure them properly to maintain a balanced and visually pleasing appearance.

7. Electrical Connection

Ensure that the electrical outlet is positioned between two studs, without any obstruction from the studs. Utilize a stud finder to identify the wall studs within the house, which are positioned behind the previously installed stud blocks. Secure the fireplace wall in place using 3-inch screws.

Plug the electric fireplace insert into a nearby electrical outlet. Ensure the power cord is long enough to reach the outlet comfortably. Conceal the power cord, if possible, by running it behind the frame or using cord management solutions to maintain a clean and tidy look.

8. Finishing Touches

To complete the look of your fireplace, you can arrange decorative elements around it. Consider placing candles, artwork, a mirror, or even a wall-mounted TV above or near the fireplace to create a cozy and inviting atmosphere.

9. Testing and Safety

Before you start enjoying your newly built fireplace, turn it on and test its functionality to ensure everything is working correctly. Familiarize yourself with the controls and settings.

As a crucial safety precaution, remember to place the fireplace on a stable surface, such as a hearth or a sturdy piece of furniture. Keep flammable materials, like curtains and furniture, safe from the heat source to prevent any potential fire hazards.

How to build a gas fireplace

Before building your own fireplace, remember that building a gas fireplace is a complex and potentially dangerous project that typically requires professional installation. Gas fireplaces involve gas lines, vents, and combustion systems that must meet strict safety standards and building codes. Attempting to build one without proper knowledge and expertise can pose serious risks. Therefore, it's strongly recommended to hire a qualified professional to install a gas fireplace.

Materials You'll Need

Gas fireplace unit

Gas line

Venting system (chimney or direct vent)

Firebox and burner assembly

Framing materials (wood or steel studs)

Fire-resistant backer board

Fire-rated drywall

Fire-resistant mortar or adhesive


Finishing materials (tile, stone, or other facing material)

Mantel and hearth (optional)

Tools You'll Need 

Gas line installation tools (pipe cutter, wrench, gas leak detector)

Framing tools (saw, drill, screws)

Drywall tools (tape, mud, sandpaper)

Tile or stone installation tools (tile saw, trowel, spacers)

Paint or stain (for finishing)

1. Select Location and Design

Choosing the right location for your gas fireplace is crucial. Consider factors such as room layout, aesthetics, and the desired focal point. The design of your gas fireplace should harmonize with your home's overall style.

2. Plan Ventilation

Ventilation is critical for safely expelling combustion byproducts and ensuring proper air supply for combustion. You'll need to decide whether your fireplace will utilize a traditional chimney or a direct vent system.

If opting for a traditional chimney, you may need to construct or modify it to accommodate the gas fireplace vent. Make sure it complies with local building codes and safety standards.

Direct vent systems involve venting through an exterior wall, typically with a concentric pipe that brings in combustion air and expels exhaust gases. This option may be more suitable for homes without existing chimneys.

3. Gas Line Installation

Gas lines should only be installed by licensed professionals experienced with gas fittings and safety procedures. They will determine the appropriate size and type of gas line needed for your fireplace.

The gas line must be securely connected to the fireplace unit, ensuring proper seals and connections to prevent leaks. Gas leak detection should be part of the installation process.

4. Framing and Firebox Installation

Construct a sturdy frame structure to support the fireplace unit. Wood or steel studs are common choices. The frame should be designed to hold the weight of the fireplace unit securely.

Inside the frame, install a fire-resistant backer board as a substrate for the firebox and burner assembly. This backer board provides a fireproof surface that ensures safety.

Position and secure the firebox and burner assembly according to the manufacturer's guidelines. Precise installation is essential for efficient combustion and safety.

5. Venting System Installation

For gas fireplaces that use a traditional chimney, it's crucial to ensure that the chimney complies with local codes and standards. This may involve modifications or the construction of a new chimney if one doesn't exist.

If you opt for a direct vent system, install the components needed for venting through an exterior wall. This typically includes a concentric pipe that brings in fresh air for combustion and expels exhaust gases.

6. Firebox Insulation and Drywall

Insulate the area around the firebox to enhance energy efficiency and reduce heat transfer to the surrounding walls.

Cover the framed structure with fire-rated drywall. Ensure that the drywall fits snugly around the fireplace unit. Fire-resistant mortar or adhesive should be used where necessary to create a fireproof barrier.

7. Facing Material Installation

Finish the fireplace surround with your chosen facing material, such as tile, stone, or another decorative option. Ensure that the facing material is installed correctly and securely. Seal joints and edges as needed to prevent heat or gas leakage.

8. Mantel and Hearth (Optional)

To complete the aesthetic look of your fireplace, you can install a mantel and hearth. These elements can add character and style to the fireplace. Make sure they are securely attached and level.

9. Gas Fireplace Unit Setup

Follow the manufacturer's instructions meticulously to set up the fireplace unit. This includes connecting it to the gas line, ensuring proper ignition, and testing all safety features. Calibration and testing of the thermostat or remote control should also be performed.

10. Safety and Inspection

Safety should always be the top priority when dealing with gas appliances. After installation, have a qualified technician inspect the gas fireplace to ensure it meets all safety standards and local codes. This inspection typically includes gas leak detection and verifying proper venting.

11. Final Inspection and Approval

Once the installation has been inspected and approved by the appropriate local authorities, you can enjoy your newly built fireplace with confidence in its safety and functionality.

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About the author

Bella has a Bachelors degree in interior design, is a master gardener. She designs nourishing outdoor & indoor spaces guided by the practice of Feng Shui.