Concrete Fireplace
Concrete is the most flexible material for fireplace surrounds, mantels, and hearths: cast in place or precast in any shape, available in dozens of colors and finishes, and built to handle the heat and load that wood, drywall, or stone-veneer alternatives often can’t. We build concrete fireplaces for residential and commercial projects across the Seattle area — from clean modern single-pour surrounds to large two-sided installations with integrated mantels and benches.
Most projects involve coordination with the firebox manufacturer (UL-rated zero-clearance unit, masonry firebox, or gas insert), the framing carpenter, and the finish carpenter. We design and pour the concrete elements to dimension after rough-in is complete, integrate with surrounding flooring, paneling, or stonework during finish, and supply sample panels for color and texture before the final pour.
Concrete fireplace types
We work with three main applications: surrounds and mantels (cast panels installed around an existing firebox - the most common residential project), hearths (floor slabs in front of the firebox, often continuous with adjacent flooring), and outdoor fireplace bases and structures (poured-in-place concrete for built-in fire pits, outdoor kitchens, and backyard hearth structures). Two-sided fireplaces and linear gas inserts with concrete surrounds are increasingly popular in Seattle's open-plan remodels.
Design and finish options
Concrete surrounds can be smooth-polished, hand-troweled, sand-blasted, or formed with texture molds that mimic limestone, slate, or marble. Color options include integral pigments (color throughout), acid stains (mottled earth tones), and dyes (vibrant contemporary hues). Simple clean-line surrounds are on the lower end of cost; integrated mantels, hearths, and custom carving are on the higher end. We cast most pieces off-site in forms, cure for 28 days, seal, and install - on-site installation takes 1–2 days.
Frequently asked questions
How much does a concrete fireplace surround cost in Seattle?
Concrete fireplace surrounds in Seattle typically range from $2,500–$8,000 depending on design complexity, size, finish, and whether a new firebox or gas insert is included. Simple slab surrounds with a clean contemporary finish are on the lower end; custom carved, pigmented, or multi-piece designs with integral mantels are on the higher end. Get a free on-site estimate for your project.
How long does it take to build a concrete fireplace?
Custom concrete fireplace surrounds and hearths typically take 2–4 weeks from design approval to installation. The concrete is cast off-site in forms, cured for at least 28 days, then finished and sealed before delivery. On-site installation takes 1–2 days. Outdoor fireplace bases poured in place take slightly longer due to cure time.
Do I need a permit for a concrete fireplace in Seattle?
Installing or replacing a fireplace in Seattle typically requires a building permit, particularly if the firebox, chimney, or gas line is being modified. Concrete surround and hearth work that doesn't touch the firebox or flue is usually cosmetic and doesn't require a separate permit. Check with Seattle's SDCI and your contractor before starting.
How do I maintain a concrete fireplace surround?
Seal the concrete surround with a heat-resistant concrete sealer every 2–3 years. Wipe down with a damp cloth - avoid acidic or abrasive cleaners that can etch or scratch the surface. Hairline cracks from thermal cycling are normal and can be filled with a matching color filler. Avoid prolonged direct flame contact on the concrete face, as excessive heat can cause surface spalling over time.
What finishes are available for concrete fireplaces?
Concrete fireplace surrounds can be finished in smooth polished, hand-troweled, sand-blasted, or acid-etched textures. Color options include integral pigments for through-color, acid stains for mottled earth tones, and dyes for vibrant contemporary looks. Concrete can also be formed with veining or texture molds to mimic limestone, marble, or slate at lower cost.
