Steelway Cellar Doors

What Steelway Cellar Doors does

Steelway Cellar Doors is a privately held, family-owned manufacturer founded in 1963 and headquartered in King of Prussia, Pennsylvania, specializing in custom and standard steel cellar doors, sidewalk doors, window wells and covers, and one-piece pre-fabricated steel cellar entrances. Production is conducted in-house at the King of Prussia facility using precision Trumpf laser cutting, with custom units built to exact job-site measurements using fully welded steel construction (no bolts), all-metal components (no plastic), multi-coat iron oxide primer, and a "no leak points" sealing design. Standard KD-series (Bilco-compatible) doors are stocked for immediate pickup or shipping.

The company sells direct to homeowners and contractors via phone (1-877-553-2610) and the cellardoors.com website, and distributes nationally through a network of 17+ certified installation partners covering the Mid-Atlantic, New England, New York, New Jersey, Western Pennsylvania, Greater Chicago, and Northwest Indiana, plus a Tri-State Cellar Doors subsidiary providing direct installation services in the Delaware Valley. Unit prices range from approximately $401 for window well combo units to $2,653+ for one-piece steel cellar entrances, with custom fabrication commanding premium pricing. The company holds ISO 9001:2015 certification and has received Basement Health Association recognition in 2023 (STAR Award) and 2025 (STAR Award and Job of the Year).

Name

Steelway Cellar Doors

Legal name

Steelway Cellar Doors LTD

Website

https://cellardoors.com

Company type

Private

Founded year

1963

Operating status

Operating

Headcount range

11–50 employees

Short description

Steelway Cellar Doors, founded 1963 in King of Prussia, PA, manufactures custom and standard steel cellar doors, sidewalk doors, and window well systems, selling direct and through 17+ certified installation partners across the US.

Ownership category

akta.pro rank

Product category

Cellar Doors and Basement Entry Systems

NAICS

Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Exterior Doors (IMADAIAA)

akta.pro secondary industries

Weatherstripping, Thresholds & Door/Window Seals (IMADAIAL), Commercial & Industrial Doors (Sectional, High-Speed, Fire, Security) (IMADAIAF)

Keywords

• Steel cellar doors
• Basement entry systems
• Sidewalk doors
• Window well covers
• Egress solutions

Headquarters

HQ city

King Of Prussia

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Custom Cellar Door Sales: Sale of custom-built steel cellar doors manufactured to exact job site measurements. One-time purchase model with shipping and handling additional.
2. Standard Cellar Door Sales: Sale of industry-standard sized cellar doors (Bilco-style replacements) available in stock for immediate pickup or shipping.
3. Sidewalk Door Sales: Commercial and residential sidewalk doors in diamond plate steel, aluminum, and galvanized options. Includes standard sizes and custom configurations.
4. Window Well and Cover Sales: Sale of window well covers, window well and cover combo units, and custom grates in various materials including steel and aluminum.
5. One-Piece Steel Cellar Entrance Sales: Sale of pre-fabricated complete stair and bulkhead packages including walls and steps for new construction or basement access addition.
6. Installation Services (through partners): Professional installation services provided through certified installation partner network across various US regions.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Steelway Cellar Doors manufactures and distributes custom and standard steel cellar doors, sidewalk doors, window wells and covers, and pre-fabricated steel cellar entrance units. The company serves both homeowners and contractors with made-to-measure steel fabrication, fully welded construction, and a network of certified installation partners across the United States. Products are built at the King of Prussia, PA facility using precision laser cutting and shipped throughout the Continental US.

Product overview

Steelway Cellar Doors is a manufacturer of custom and standard steel cellar doors, sidewalk doors, window wells and covers, and related products serving homeowners and contractors since 1963. The product portfolio centers on custom cellar doors (including Angled, Flat, Corner, B-Style, Along-Side, Angle-on-Angle, and Crawl Space configurations) and standard KD-series doors, complemented by One Piece Steel Cellar Entrances (pre-fabricated bulkhead and stair units). Sidewalk offerings include Diamond Plate and Aluminum doors for commercial and residential applications. Window well products encompass covers (Rectangular, Curved, Steel), Window Well and Cover Combo Units, and Custom Window Well Grates. The company also provides concrete/foundation services and professional installation through a network of certified partners. All products are American-made in King of Prussia, PA, featuring steel or aluminum construction with galvannealed options for corrosion resistance.

Differentiator

Problem solved

Functional benefit

Products and services

• Custom Cellar Doors Custom-built steel cellar doors manufactured to exact job site measurements, featuring 100% steel construction, fully-welded joints, multi-coat iron oxide primer, and weather-tight design. For homeowners and contractors needing non-standard or replacement doors.
• Standard Cellar Doors (KD Series and Gordon Style) Industry-standard sized angled cellar doors made of heavy 12-gauge steel with no leak points, top-of-the-line gas shocks, and professional red oxide primer. Available in KD-B, KD-C, KD-SL, KD-O, and Gordon CD/RD models for retrofit precast entryways.
• One Piece Steel Cellar Entrance Pre-fabricated complete steel stair and bulkhead package including walls and steps for new construction or adding basement access to an existing home. Save time and money during construction.
• Diamond Plate Sidewalk Doors Commercial-grade sidewalk doors featuring 3/16" diamond plate steel panels with 1/4" angle iron frame, designed to support 300 lb/sf live load. Available in standard and custom configurations with various locking options.
• Aluminum Sidewalk Doors Lightweight aluminum sidewalk doors with 1/4" diamond plate panels, featuring locking mechanism for additional security. Designed for easy movement of people and products in commercial and residential applications.
• Window Well Covers Steel window well covers made from 12 gauge hot rolled steel with welded seams, dipped in red metal oxide primer, with UV-protected polycarbonate replaceable lenses. Available in Rectangular, Curved, and Steel window well configurations.
• Window Well and Cover Combo Unit Innovative all-in-one window well and cover unit made of 12 gauge galvannealed steel with strong UV-protected multi-wall polycarbonate lens. Available in 4 standard sizes. Patent pending.
• Custom Window Well Grates Custom-fit heavy-duty window well grates built from high-strength steel angle iron or 6061 aluminum, with expanded metal walking surface for ventilation and debris prevention. Available as operable or non-operable.
• Basement Egress Installation Services Professional installation of egress entrances, stair units, egress windows, and complete basement entry systems by certified installation partners. Includes permit handling and project management.

Quantifiable outcome

• Standard doors in-stock ready for immediate shipping or pickup
• +3 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

18 partnerships are on record, tiered core.

• A.M. Shield Waterproofing CorpcoreChannel Partner/ Reseller/ DistributorCertified Steelway installation partner serving the New York City metro area including Long Island, Queens, and Westchester. Specializes in basement waterproofing and egress-focused work prioritizing safety, durability, and code compliance.
• AquaGuard WaterproofingcoreChannel Partner/ Reseller/ DistributorCertified installation partner serving the Mid-Atlantic region including Washington D.C., Maryland, and parts of Northern Virginia. Provides basement waterproofing, structural repair, and bulkhead door installation services.
• B-Sure Systems, Inc.coreChannel Partner/ Reseller/ DistributorCertified partner serving Central and Upstate New York including Syracuse, Rochester, Binghamton, Watertown, and surrounding counties. Specializes in basement water issues and code-aware egress and cellar door installations.
• Bulkhead Doors, Inc.coreChannel Partner/ Reseller/ DistributorCertified installation partner serving customers throughout New England. Delivers professional bulkhead and cellar door installations focused on clean lines, solid fit, and weather-resistant basement access.
• Connecticut Cellar Doors LLCcoreChannel Partner/ Reseller/ DistributorCertified partner providing service statewide in Connecticut, supporting homeowners and commercial properties. Specializes in cellar door and basement-entry installations designed for long-term performance with factory-trained team.
• EcoSpect Inc.coreChannel Partner/ Reseller/ DistributorCertified partner founded in 1995 serving Central and Western New York including Syracuse and Rochester areas. Focuses on basement health work including moisture, drainage, air quality, and safe basement access. Nearly three decades of experience.
• Hampton Concrete, Inc.coreChannel Partner/ Reseller/ DistributorCertified partner serving Western Pennsylvania including Allegheny, Butler, Beaver counties and surrounding communities. Known for careful prep work, clean installation practices, and long-term durability.
• Juzefyk Brothers ConstructioncoreChannel Partner/ Reseller/ DistributorCertified partner serving homeowners and contractors throughout Northern and Central New Jersey. Prioritizes protection, longevity, and proper drainage with traditional workmanship and modern best practices.
• Perma-Seal Basement SystemscoreChannel Partner/ Reseller/ DistributorAuthorized Steelway distributor and installation partner serving the Greater Chicago Metropolitan area and Northwest Indiana. Decades of experience addressing basement moisture and structural issues with expert product guidance and installation.
• Pro-Line Basement ProductscoreChannel Partner/ Reseller/ DistributorLead supplier partner for New England region including New Hampshire, Massachusetts, Maine, Vermont, Connecticut, and Rhode Island. Helps homeowners, builders, and contractors get right products quickly.
• Riefler ConstructioncoreChannel Partner/ Reseller/ DistributorCertified partner serving Western New York and surrounding counties including Erie, Niagara, Monroe, and others. Known for durable results, solid prep work, and attention to details.
• Scaldino Basement SolutionscoreChannel Partner/ Reseller/ DistributorCertified partner providing specialized basement waterproofing, structural repair, and cellar door installation throughout Northern New Jersey and Staten Island, NY. Locally rooted with years of hands-on experience.
• The Basement TransformercoreChannel Partner/ Reseller/ DistributorCertified partner providing Steelway product distribution and expert installation services throughout the Hudson Valley. Located in Goshen, NY, helps clients upgrade basement access and below-grade spaces.
• The Bulkhead Man & Sons LLCcoreChannel Partner/ Reseller/ DistributorCertified partner primarily serving Southern New Hampshire with service availability across nearby Northeast communities. Helps homeowners improve basement access with properly installed cellar doors.
• The Bulkhead Man, Inc.coreChannel Partner/ Reseller/ DistributorCertified partner providing service across Massachusetts. Helps homeowners replace and upgrade basement entry doors with precise installations and dependable materials.
• True North Bulkheads and EgresscoreChannel Partner/ Reseller/ DistributorCertified partner with 10+ years experience serving Southern New Hampshire and nearby Northern Massachusetts. Delivers reliable installations built for safety, code requirements, and long-term durability.
• Twin State Basement ServicescoreChannel Partner/ Reseller/ DistributorCertified partner providing professional cellar door and basement entry system installation throughout Vermont, Western New Hampshire, and select Northern New York communities. Background in foundation repair and waterproofing.
• AquaGuard MarylandcoreChannel Partner/ Reseller/ DistributorMaryland-specific partner offering bulkhead door installation services in Maryland with over 80,000 successful installations since 1978. Serves extensive Maryland coverage including Baltimore, Anne Arundel, Montgomery, Prince George's counties and more. Also covers parts of Virginia and DC.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Bilco Company: Bilco is the dominant direct competitor in basement/cellar doors, with standard sizes that Steelway explicitly competes against and offers custom-fit replacements for. Same product category, similar customer base (homeowners, contractors), same distribution through building materials channels.
• Boman Kemp: Boman Kemp manufactures egress window wells and basement egress systems directly comparable to Steelway's window well and egress product lines. Same residential basement safety/egress category with overlapping customers (homeowners, contractors).
• Coverwell Window Well Covers: Coverwell specializes in custom window well covers and egress solutions, directly competing with Steelway's window well cover and grate products. Same residential customer base with comparable custom-fit offering.

Broad incumbents

• Activar Construction Products Group: Activar is the parent company of Bilco and a broader construction products portfolio including access doors, roof hatches, and floor doors. Comparable as a larger incumbent in adjacent metal building products with overlapping but wider offerings than Steelway's niche.
• Acudor Access Doors: Acudor manufactures a wide range of metal access doors and panels for commercial and residential construction. Overlaps with Steelway's metal door fabrication expertise but serves a broader access panel category rather than cellar doors specifically.
• Nystrom Building Products: Nystrom produces floor doors, roof hatches, and access products for the building industry, overlapping with Steelway's sidewalk door and metal fabrication capabilities. Broader product portfolio serving commercial construction customers.
• JL Industries: JL Industries manufactures access panels, fire-rated doors, and roof hatches as part of Activar Construction Products Group. Comparable metal building products manufacturer with broader portfolio and similar production approach.

Regional players

• Perma-Seal Basement Systems: Perma-Seal is both a Steelway certified installation partner and an independent basement waterproofing and egress services provider in the Chicago/Northwest Indiana market. Comparable as a regional basement health and egress services company with installation capability.
• AquaGuard Waterproofing: AquaGuard is a Steelway certified installation partner and one of the largest basement waterproofing and bulkhead door installers in the Mid-Atlantic, reporting over 80,000 successful installations. Operates as a complementary regional service provider.

Emerging players

• Custom Fabricators (regional steel manufacturers): Various regional steel fabrication shops produce custom cellar and bulkhead doors in local markets, representing fragmented emerging competitors with limited geographic reach and no national brand presence compared to Steelway.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/SteelwayDoors
• LinkedInlinkedin.com/company/steelway-cellar-doors

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Steelway Cellar Doors