Verified Nov 2026
Other
·
New Haven, Connecticut
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Since 1926
The Bilco Company, founded in 1926 and headquartered in New Haven, Connecticut, manufactures specialty access products including basement doors, roof hatches, egress window wells, and fire vents for residential and commercial construction. Operating as a wholly owned subsidiary of Quanex Corporation with 200–500 employees and an estimated revenue of $1–5 billion, the company serves automotive, construction, and renewable-energy sectors. In 2026, it opened a manufacturing facility in Zanesville, Ohio to produce basement doors and window wells.
The Bilco Company at a glance
Revenue
$1-5B
Est. band
Employees
200-500
Founded
1926
Headquarters
New Haven, Connecticut
Certifications
ISO 9001
Import activity
6
Industries
Automotive
Construction
Renewable Energy
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
6
Named foreign suppliers
3
Top origins
Belgium · Netherlands · China
Shared foreign counterparties do not establish that these companies buy from The Bilco Company.
What this tells a buyer
Customs records show 6 total shipments with primary sourcing from Belgium (Colt International, 127 shipments) and China (Dongguan Alfa Automation Technology, 22 shipments).
The company manufactures rubber and glass components and holds ISO 9001 certification.
As a subsidiary of Quanex Corporation operating under the Custom Solutions segment, Bilco operates manufacturing facilities across Connecticut, Ohio, and Arkansas, with a third facility opened in Juarez, Mexico in July 2026.
Source: US customs bill-of-lading records and public filings · Last verified Nov 06, 2026
STABILITY SIGNALS
Established & active
100 years in operation (founded 1926).
6 US import shipments on record.
Holds ISO 9001 certification(s) per public sources.
Overview
The Bilco Company, founded in 1926 and headquartered in New Haven, Connecticut, manufactures specialty access products including basement doors, roof hatches, egress window wells, and fire vents for residential and commercial construction. Operating as a wholly owned subsidiary of Quanex Corporation with 200–500 employees and an estimated revenue of $1–5 billion, the company serves automotive, construction, and renewable-energy sectors. In 2026, it opened a manufacturing facility in Zanesville, Ohio to produce basement doors and window wells.
At a glance
Attribute | Detail |
|---|---|
Founded | 1926 |
Headquarters | New Haven, Connecticut |
Employees | 200-500 |
Revenue | $1-5B (estimated) |
Certifications | ISO 9001 |
What The Bilco Company makes
The company manufactures rubber and glass components and holds ISO 9001 certification.
Products and capabilities described on the company's own site include Rubber, Glass (source: bilco.com).
Certifications
The Bilco Company is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 9001 — wwdmag.com
Trade and customs footprint
Customs records show 6 total shipments with primary sourcing from Belgium (Colt International, 127 shipments) and China (Dongguan Alfa Automation Technology, 22 shipments). US customs bill-of-lading records list 6 inbound shipments across 3 foreign suppliers, with top origins including Belgium · Netherlands · China.
Latest developments
2026-08-21 — Our Zanesville, OH manufacturing facility opened to manufacture basement doors and window wells, and we introduced StakWEL® Window Wells to our product line. | The BILCO Company (linkedin.com)
2026-07-24 — BILCO opened a third manufacturing facility in Juarez, MX to keep up with the demand for commercial construction products. | The BILCO Company (linkedin.com)
2026-05-08 — BILCO Expands Rep Coverage Into Arkansas | Walls & Ceilings (wconline.com)
2026-05-06 — BILCO Rep Adds Territory in Arkansas - Roofing (roofingmagazine.com)
2026-03-31 — We’re pleased to welcome Midlantic Group as BILCO’s new manufacturer’s representative for residential products in New England and several regions of New York. | The BILCO Company (linkedin.com)
2026-02-18 — A $4M North Carolina Brewery expansion includes 8 BILCO smoke vents to enhance fire safety in its 16,000-sq-ft facility. The vents help remove smoke, heat and toxic fumes, ensuring a safer environment … (linkedin.com)
Facilities
The Bilco Company is headquartered in New Haven, Connecticut. Public sources also reference these locations:
Connecticut — roofingmagazine.com
Ohio — roofingmagazine.com
West Haven, Connecticut — wwdmag.com
Trumann, Arkansas — wwdmag.com
Company details
As a subsidiary of Quanex Corporation operating under the Custom Solutions segment, Bilco operates manufacturing facilities across Connecticut, Ohio, and Arkansas, with a third facility opened in Juarez, Mexico in July 2026. The Bilco Company was founded in 1926, has an estimated 200-500 employees, and is headquartered in New Haven, Connecticut. On the LightSource stability read it is rated "Established & active": 100 years in operation (founded 1926). 6 US import shipments on record. Holds ISO 9001 certification(s) per public sources.
Frequently asked questions
What does The Bilco Company do?
The Bilco Company, founded in 1926 and headquartered in New Haven, Connecticut, manufactures specialty access products including basement doors, roof hatches, egress window wells, and fire vents for residential and commercial construction. Operating as a wholly owned subsidiary of Quanex Corporation with 200–500 employees and an estimated revenue of $1–5 billion, the company serves automotive, construction, and renewable-energy sectors. In 2026, it opened a manufacturing facility in Zanesville, Ohio to produce basement doors and window wells.
Where is The Bilco Company headquartered?
The Bilco Company is headquartered in New Haven, Connecticut (370 James Street, New Haven, Connecticut, 06513).
When was The Bilco Company founded?
The Bilco Company was founded in 1926.
How big is The Bilco Company?
The Bilco Company has an estimated 200-500 employees, with revenue in the $1-5B range (estimated).
What certifications does The Bilco Company hold?
The Bilco Company lists ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Does The Bilco Company import from overseas suppliers?
US customs bill-of-lading records show 6 inbound shipments for The Bilco Company, with top origins including Belgium · Netherlands · China.
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Last verified Nov 2026. Is this your company? Request a correction.
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