C

CarbonBuilt

Produces ultra-low carbon concrete blocks

Overview

CarbonBuilt produces ultra-low carbon concrete blocks and sells carbon credits to decarbonize construction. The blocks cut concrete emissions by 70% to over 100% without raising production costs, while maintaining performance and plant operations. It differentiates itself with cost parity to traditional blocks, industry-leading Environmental Product Declarations (EPDs), and access to high-quality carbon credits for producers, builders, and carbon-credit buyers. Its goal is to dramatically reduce the concrete footprint in construction, improve ESG/LEED outcomes, and accelerate decarbonization with affordable, verifiable low-carbon blocks and credits.

Significant Headcount Growth

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About CarbonBuilt

Simplify's Rating
Why CarbonBuilt is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Industrial & ManufacturingFinancial Services

Company Size

11-50

Company Stage

Grant

Total Funding

$17.7M

Headquarters

Killingly, CT

Founded

2020

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What believers are saying

  • CarbonBuilt launched Connecticut commercial production on December 2, 2025, creating sellable output.
  • The November 2, 2026 DAC project secured $150,000 and federal-local momentum in Arizona.
  • 2024 funding reached $55 million, supporting plant expansion, partnerships, and product commercialization.

What critics are saying

  • Competitors like CarbiCrete and CarbonCure target the same low-carbon concrete buyers directly.
  • A failed Arizona rollout by 2027 would expose CarbonBuilt’s economics and operational complexity.
  • Customer concentration risk remains high; Meta and Shopify contracts do not diversify revenue.

What makes CarbonBuilt unique

  • CarbonBuilt’s Reversa binder cuts cement use up to 50% without performance tradeoffs.
  • Danielson, Connecticut production started December 2025, proving commercial manufacturing, not lab-scale demos.
  • CarbonBuilt and Aircapture are building the first DAC-to-concrete facility with Block-Lite.

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Funding

Total Funding

$17.6M

Above

Industry Average

Funded Over

3 Rounds

Grant funding comparison data is currently unavailable. We're working to provide this information soon!
Grant Funding Comparison Coming Soon

Growth & Insights and Company News

6 month growth

-4%

1 year growth

5%

2 year growth

-4%
U.S. Securities and Exchange Commission
Oct 25th, 2026
EDGAR Filing Documents for 0001885518-21-000001

EIN.: 853842562 | State of Incorp.: DE | Fiscal Year End: 1231Type: D | Act: 33 | File No.: 021-415088 | Film No.: 211292393

Concrete Products
Feb 9th, 2026
CarbonBuilt reshapes Jolley plant methods and branding

CarbonBuilt reshapes Jolley plant methods and branding. Los Angeles-based CarbonBuilt Inc., a developer of processes lowering the carbon dioxide emissions associated with conventional concrete masonry unit production, is molding block using its Reversa binder technology at a wholly owned, Danielson, Conn. operation. Ratings gleaned from the Building Transparency Embodied Carbon in Construction Calculator (EC3) indicate CarbonBuilt block have the lowest carbon factor of any block produced in the U.S. "This is a defining moment for CarbonBuilt," says CEO Michelle Carvin. "With the conversion of the Danielson plant complete, we're demonstrating how our innovative Reversa technology combined with more efficient operating processes are transforming the future of concrete masonry. We are producing high-performing block with dramatically lower carbon emissions. Building owners, architects, general contractors, and masons across the Northeast can now source concrete masonry units that deliver exceptional quality and a meaningful climate impact, without paying a premium." Made from a proprietary blend of upcycled industrial materials, Reversa replaces traditional carbon-intensive cement in concrete production, dramatically reducing its carbon footprint. Through the replacement of up to 50 percent of cement in CMU mix designs with Reversa, waste reduction and targeted operational upgrades, CarbonBuilt is improving product quality while reducing the plant's carbon footprint by as much as 70 percent. Since acquiring the Jolley Concrete and Block plant in Danielson, CarbonBuilt has invested in operational efficiency, strengthened product quality, and reduced both cement usage and material waste. The facility has annual production capacity of 80,000-plus tons and is poised to offer low carbon segmental retaining wall units and architectural masonry products in the near term.

GlobeNewswire
Feb 4th, 2025
CarbonBuilt Acquires Jolley Concrete and Block

Plans to expand production capacity and transform the plant into New England’s first ultra-low carbon concrete masonry and hardscapes manufacturing...

The Industry Times
Sep 24th, 2024
CarbonBuilt Collaborates with Meta to Accelerate Production of Ultra-Low Carbon Concrete

CarbonBuilt collaborates with Meta to accelerate production of ultra-low carbon concrete.

Castle Placement
Aug 15th, 2024
CleanTech / Clean Energy Capital Raises in the U.S. - August 1st - 11th, 2024

CarbonBuilt, headquartered in Torrance, California, raised $14.35 million in early-stage VC funding to scale its carbon reduction technology.Remi, based in Lehi, Utah, raised $23.28 million to enhance its eco-friendly real estate solutions.

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