Every new California business filing, every dayBlack Diamond Building Group
Black Diamond Building Group presents itself as a design-build firm, likely a small contractor. The website has minimal contact information, suggesting it may be a newly established business. The name and design-build focus align closely with the LLC filing.
Filed November 23, 2025 · San Diego, CA · San Diego County
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California Secretary of State (bizfile Online) · Entity B20250396027 · Retrieved May 14, 2026
About Black Diamond Building Group
Black Diamond Design + Build LLC filed in California on November 23, 2025, as a design-build construction contractor based in San Diego. The company registered its domain nearly 13 months before filing, through Squarespace Domains, and we first spotted it 172 days after filing. It was filed through United States Corporation Agents, a formation service that also serves 8,434 other entities. We estimate annual revenue under $100,000 and 1-5 employees. No annual report or EIN on file yet.
- Domain registered 397 days before filing, indicating early planning.
- Filed through a formation service shared with 8,434 other entities.
- We estimate revenue under $100,000 and 1-5 employees.
- Website is modern quality.
- No annual report or EIN on file yet.
- First seen 172 days after filing.
Compiled from the state record, the company's public web presence, and our own research; revenue, employee, and footprint figures are estimates, not verified financials. Updated August 24, 2026.
One of 273 new businesses registered in San Diego in November 2025, one of 5 construction contractor businesses.
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Filing Details
Verified Business Profile
Contact Information
Verified Website Profile
We matched this business to its website and pulled the domain's registration (WHOIS) record. Domain age is one of the strongest signals that a filing is a truly new business and not a re-filing or paperwork change.
Frequently Asked Questions
When was Black Diamond Building Group registered?
Black Diamond Building Group was registered as LLC on November 23, 2025 in California.
Where is Black Diamond Building Group located?
Black Diamond Building Group is based in San Diego, CA, 92101, in San Diego County.
What type of business is Black Diamond Building Group?
Black Diamond Building Group is classified as a construction contractor business (design-build).
Does Black Diamond Building Group have an EIN on file?
No EIN was found on file for Black Diamond Building Group at the time of registration.
Who Sells to This Business
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