Cornerstone Construction
Cornerstone Construction GS LLC is a family-owned general and project management contractor in Erie, PA, serving commercial, industrial, and residential customers across northwestern Pennsylvania since approximately 1985.
- Company typePrivate
- Founded1985
- HeadquartersErie, United States
- Headcount11–50
- GTM typeB2B and B2C
- OfferingServices
What Cornerstone Construction does
Cornerstone Construction GS LLC is a family-owned general and project management contractor headquartered in Erie, Pennsylvania. The firm operates across three service lines — commercial, industrial, and residential construction — serving customers in the northwestern Pennsylvania regional market. The company holds Pennsylvania Home Improvement Contractor registration PA066547, is fully insured, and operates under a direct-to-customer model offering free estimates across all three segments.
The business is led by Gene Seip (Owner/President), Chris Edmiston (Vice President), and Matt Edmiston (Project Manager), reflecting a family-led leadership bench. Founded approximately 40 years ago (circa 1985), the company has operated continuously as an independent, privately held contractor with no external venture capital or private equity backing. Its go-to-market approach is sales-led and direct, with no intermediated channels, supported by a basic website presence and minimal digital marketing footprint.
Cornerstone Construction competes in a localized and fragmented construction services market. The firm does not disclose technology stack, proprietary tools, or AI/ML capabilities, and the source material shows no evidence of funded expansion, acquisitions, or geographic moves beyond the Erie, PA service area. Revenue, headcount trend, and backlog data are not disclosed.
Cornerstone Construction firmographics
Firmographics- Name
- Cornerstone Construction
- Legal name
- Cornerstone Construction GS LLC
- Website
- https://cornerstoneconstruction.us
- Company type
- Private
- Founded year
- 1985
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Cornerstone Construction GS LLC is a family-owned general and project management contractor in Erie, PA, serving commercial, industrial, and residential customers across northwestern Pennsylvania since approximately 1985.
- Ownership category
- akta.pro rank
Cornerstone Construction industry classification
Industry- Product category
- General Construction Contracting
- NAICS
- Nonresidential Building Construction (2362), Industrial Building Construction (23621), Commercial and Institutional Building Construction (236220)
- SIC
- General Bldg Contractors - Nonresidential Bldgs (1540), General Bldg Contractors - Residential Bldgs (1520)
- akta.pro primary industry
- Office & Corporate Building Construction (IMAFACAA)
- akta.pro secondary industry
- Religious & Cultural Building Construction (Places of Worship, Museums, Libraries) (IMAFACAH)
Keywords
Where Cornerstone Construction is headquartered
LocationHeadquarters
- HQ city
- Erie
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Cornerstone Construction business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Supply Chain, Others
Revenue model
- Construction Services: Revenue is generated through providing construction and remodeling services across commercial, industrial, and residential sectors. Services include general contracting, project management, carpentry, flooring, concrete work, electrical, plumbing, and mechanical services. The company offers free estimates to potential customers as part of their sales process.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Free estimates available for all construction and remodeling needs |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels1 record
Cornerstone Construction product offering
Product offeringCore offering
Cornerstone Construction is a general and project management contractor offering construction and remodeling services across commercial, industrial, and residential sectors. Service capabilities include carpentry, flooring, concrete work, electrical, plumbing, mechanical installation, structural steel, machinery installation, conveyor systems, process piping, and crane installation. The company provides free on-site estimates and delivers projects directly through its own professional, background-tested crew in the Erie, Pennsylvania area.
Product overview
Cornerstone Construction is a General and Project Management Contractor offering three core service lines: Commercial, Industrial, and Residential construction. The company operates as a family-owned business serving the Erie, Pennsylvania area for over three decades. Commercial services include construction and renovation of worship centers, classrooms, offices, and ADA-compliant facilities. Industrial services encompass machinery installation, conveyor systems, process piping, and structural steel work. Residential services cover carpentry, flooring, concrete work, and electrical/plumbing installation.
Differentiator
Problem solved
Functional benefit
Products and services
- Commercial Construction Services Comprehensive commercial construction and renovation services including worship centers, classrooms, offices, hallways, restrooms, social halls, lobbies, conference rooms, waiting areas, and ADA-compliant facilities for commercial property owners and organizations.
- Industrial Construction Services Industrial construction services including general construction, in-plant offices, prefab wall systems, alterations and renovations, flooring, exterior finishes, concrete placement and finishing, machinery installation and foundations, conveyor systems, cranes, process piping, exhaust systems, structural steel installation, and welding for industrial facility operators.
- Residential Construction Services Residential construction and remodeling services including carpentry (additions, renovations, windows, doors, decks, garages, pole barns, siding), flooring (ceramic, laminate, hardwoods), concrete work (driveways, sidewalks, decorative), and electrical and plumbing installation and repairs for homeowners.
Companies that use Cornerstone Construction
Customer profileSegments3 records
Ideal customer profiles3 records
Cornerstone Construction technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Cornerstone Construction partnerships and signals
Strategic signalScale indicators2 records
Recent moves4 records
Cornerstone Construction competitors and assessment
Company assessmentDirect peers
- Wohlsen Construction Company: Lancaster, PA-headquartered regional general contractor delivering commercial, industrial, healthcare, and senior living construction. Comparable to Cornerstone as a mid-Atlantic regional GC with multi-vertical service delivery.
- Quandel Construction Group: Harrisburg, PA-based mid-sized general contractor serving commercial, industrial, and institutional clients across the Mid-Atlantic. Highly comparable to Cornerstone as a regional, multi-vertical general contractor operating in Pennsylvania.
- Alexander Building Construction Co. Pennsylvania-based general contractor serving commercial, industrial, and institutional clients across central and eastern PA. Closely comparable in scope and regional positioning to Cornerstone's Erie-based operation.
Broad incumbents
- Turner Construction Company: One of the largest U.S. general contractors, serving commercial, healthcare, education, and industrial clients nationally. Represents the incumbent competitive ceiling Cornerstone faces on larger institutional and industrial pursuits.
- Gilbane Building Company: Major U.S. general contractor and construction manager serving commercial, industrial, healthcare, and education markets. Comparable to Cornerstone in vertical mix but at far greater scale and geographic reach.
- Skanska USA: Global construction and development firm with substantial U.S. commercial, industrial, and civil operations. Comparable to Cornerstone in offering general contracting across commercial and industrial verticals but at vastly larger scale.
- M.A. Mortenson Construction: Large national general contractor with significant commercial, industrial, and renewable energy practices. Represents the larger-scale incumbent competition Cornerstone encounters on industrial and institutional bids.
Regional players
- P. Agnes: Philadelphia-based family-owned construction manager and general contractor serving healthcare, commercial, and institutional clients. Comparable as a family-oriented regional GC with multi-vertical capabilities in Pennsylvania.
- Mascaro Construction Company: Pittsburgh, PA-based regional general contractor with commercial, industrial, and healthcare project experience across western PA and the broader Ohio Valley. Comparable regional GC operating in adjacent Pennsylvania markets.
- BECC Construction: Erie, PA-based general contractor serving commercial and industrial clients in the Erie region. Direct local-market peer operating in the same geographic footprint as Cornerstone.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat3 records
Key risks5 records
Key highlights5 records
Customer concentration
Cornerstone Construction compliance and trust
Trust signalCompliance1 record
Cornerstone Construction financial estimates
Financial estimateRevenue estimate
Valuation estimate
Cornerstone Construction leadership team
Management profileNumber of profiles
Profiles3 records
Cornerstone Construction funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Cornerstone Construction M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Cornerstone Construction
What does Cornerstone Construction do?
Cornerstone Construction is a general and project management contractor offering construction and remodeling services across commercial, industrial, and residential sectors. Service capabilities include carpentry, flooring, concrete work, electrical, plumbing, mechanical installation, structural steel, machinery installation, conveyor systems, process piping, and crane installation. The company provides free on-site estimates and delivers projects directly through its own professional, background-tested crew in the Erie, Pennsylvania area.
Is Cornerstone Construction a public or private company?
Cornerstone Construction is a private company. It is classified as family owned and is currently operating.
When was Cornerstone Construction founded?
Cornerstone Construction was founded in 1985. It employs 11 to 50 people.
Where is Cornerstone Construction based?
Cornerstone Construction is headquartered in Erie, United States, in the North America region.
How does Cornerstone Construction make money?
One revenue line is on record: construction Services.
Who are Cornerstone Construction's main competitors?
Direct peers on record are Wohlsen Construction Company, Quandel Construction Group and Alexander Building Construction Co.. Broad incumbents are Turner Construction Company, Gilbane Building Company, Skanska USA and M.A. Mortenson Construction. Regional players are P. Agnes, Mascaro Construction Company and BECC Construction.
Does Cornerstone Construction have an API?
No public API is recorded for Cornerstone Construction.
What industry is Cornerstone Construction in?
Cornerstone Construction's product category is General Construction Contracting. Its primary akta.pro industry code is IMAFACAA, Office & Corporate Building Construction, with a secondary code of IMAFACAH, Religious & Cultural Building Construction (Places of Worship, Museums, Libraries). Its NAICS code is 2362 and its SIC code is 1540.