Mycelium Brick Manufacturing Plant Project Report (DPR) 2026

What is a mycelium brick?

A mycelium brick is a lightweight block grown rather than fired or cast. Chopped farm or forestry residue, such as hemp hurd, straw, sawdust or corn stalks, is sterilized, mixed with a living fungal culture and packed into molds. Over several days the fungus threads its root-like mycelium through the loose particles and glues them into a solid shape, which is then dried with heat to stop growth. The result is a block or board made mostly of plant fiber and fungal tissue.

Most products weigh about 100–300 kg per cubic meter, roughly a tenth of a clay brick, so they serve as insulation, acoustic panels, interior partitions and formwork rather than load-bearing walls. Italian maker Mogu lists a density of 120 kg per cubic meter, thermal conductivity of 0.050 W/mK and a European fire class as good as B-s2-d0 in its March 2026 acoustic panel datasheet. Heat-pressed grades are denser and stiffer.

No HS line is dedicated to the product. Boards bound from wood particles are candidates for HS 441011, and those from straw, bagasse or hemp for HS 441090, which covers board of other ligneous materials, whether or not agglomerated with organic binders. Live, still-growing blocks fall under mushroom spawn, HS 060290, as an April 2026 U.S. Customs ruling on colonized substrate logs confirmed. Producers should seek a binding ruling before exporting.

Mycelium brick market overview and global demand

The business is tiny and early. Credence Research's global market estimate for these bio-grown blocks puts sales at USD 60 million in 2024, growing 13.8% a year to USD 168.8 million by 2032. Carried forward, that implies about USD 68 million in 2025, based on the 2024 figure and that growth rate. Much of today's revenue comes from interior acoustic panels, design pieces and pilot buildings rather than structural walls, and there is no trade statistic or production census that tracks the product on its own.

The pull comes from embodied carbon. The UN Environment Programme's Global Status Report for Buildings and Construction, published in March 2025, attributes about 32% of global energy use and 34% of CO2 emissions to the sector. Grown materials store plant carbon and need far less process heat than fired brick, cement block or foam insulation, so they appeal to developers chasing low-carbon ratings and to public clients in Europe.

Real volumes are still pilot scale. MycoTile in Nairobi told the Associated Press in October 2025 that it makes about 3,000 square meters of panels a month from roughly 250 tons of sugar-industry waste a year. In Namibia, the MycoHAB project has built houses from blocks grown on invasive encroacher bush. In Europe, start-ups in the United Kingdom, Italy, Estonia and Denmark sell panels or run pilots. Buyers sit inside the broader green building materials industry, but most still treat grown blocks as a specialty item until fire, moisture and durability data mature. Demand forecasts for this product should be read as directional.

Mycelium brick manufacturing process

A mycelium plant looks more like a mushroom spawn farm than a brickworks. The core skill is keeping competing molds and bacteria out while a single fungal strain colonizes the substrate quickly and evenly. Cycle time, contamination rate and drying energy decide unit cost.

• Residue preparation. Hemp hurd, straw, sawdust, husk or stalks are received, checked for moisture and contamination, then shredded or hammer-milled to a set particle size. Fine dust is screened out because it compacts and starves the culture of air.
• Hydration and sterilization. The chips are wetted to about 60% moisture, blended with flour or bran as a nutrient and heat-treated by steam in autoclaves or a pasteurizing mixer. This step kills wild spores that would otherwise ruin the batch.
• Inoculation and mold filling. In a filtered clean zone, the cooled substrate is mixed with grain spawn of a chosen fungus, often a Ganoderma, Pleurotus or Trametes species, and packed into plastic or metal molds shaped as bricks, panels or custom forms.
• Incubation. Filled molds sit on racks in dark, humidity-controlled rooms at about 22–28 degrees Celsius for roughly 4–10 days, depending on strain and thickness. Thicker blocks may be demolded and given a second short growth to form a skin.
• Drying and pressing. Blocks are dried in convection ovens or kilns until growth stops and moisture falls near 10%. Denser grades pass through a heated press, which raises stiffness but adds cost.
• Finishing and testing. Pieces are trimmed, coated where water or fire resistance is needed, sampled for density, strength, thermal and fire performance and packed.

Drying is the largest energy load, since each cubic meter of product starts with about 300 kg of water to evaporate. Plants that capture waste heat or use solar thermal input gain a lasting cost edge.

Mycelium brick plant setup cost

For a plant growing 5,000 cubic meters a year of dried blocks and boards, total project cost lands at roughly USD 2.3–5 million, including land, buildings, incubation rooms, machinery, molds, a laboratory, certification testing and working capital. The low end reflects an Asian industrial park and the high end a U.S. or EU site. No published feasibility study for a plant of this kind exists yet, so the range is built bottom-up from equipment list prices and assumed construction rates. The full report can be customized to any country.

Sterilization shows how the machinery budget is built. A Chinese supplier lists a 3.4 cubic meter horizontal mushroom autoclave at about USD 12,000, and a plant of this size needs about four such chambers, or a continuous pasteurizing mixer with a boiler, putting the step at an assumed USD 80,000–200,000. Shredders, mixers, mold fillers, thousands of molds, racks, drying kilns, an optional hot press and trimming saws bring plant and machinery to an assumed USD 750,000–1.8 million.

Land is the clearest worked example. A 1 hectare site, or 10,000 sq m, holds a 3,000 sq m building with about 600 sq m of climate-controlled incubation, residue storage and truck access (assumed). At USD 20–60 per sq m (assumed), land costs about USD 200,000–600,000.

Buildings take an assumed USD 600,000–1.1 million, since incubation rooms need insulation, filtered air and tight humidity control. Fire, thermal and durability testing for building approval, plus contingency, adds USD 300,000–600,000, a line first-time investors often underestimate.

Labor dominates running cost because molds are still handled largely by hand, which makes automation the main lever for future plants.