What Hennessy Company does

Hennessy Company, doing business as Hennessy Co. Construction, is a private construction, real estate development, and project management firm founded by Dave Hennessy in 2002 and headquartered at 314 S. River St., Suite 208, Hailey, Idaho. The company delivers integrated development and construction services across three product categories — residential developments (Thunder Springs, Elkhorn Springs, Golden Eagle, Quigley Farm), custom and spec homes (Quigley Farmhouse, Warm Springs Home, Elkhorn Springs Home), and commercial/public projects (Penn Club, The Osborn, New York Aquarium) — with disclosed individual project values ranging from $7 million to $130 million. The firm operates as developer, project manager, or construction consultant depending on mandate and orchestrates complex multi-stakeholder engagements that have employed 150-350 tradespeople per day on major assignments.

The underlying capability is integrated project execution rather than proprietary technology. Hennessy coordinates planning, top-tier landscape architects and engineers, municipal approvals, construction, and trade workforce management, and positions itself as a community steward rather than a transactional builder — described as 'here to stay' in the Wood River Valley of Idaho. The company's craft credentials are evidenced by four industry awards, including a New York Preservation Award, Municipal Arts Society Reconstruction Award, AGC Build New York Award, and Concrete Industry Board Award of Excellence.

Hennessy generates revenue through one-time, project-based contracts — fixed-price or cost-plus construction engagements and real estate development mandates — serving high-net-worth residential property owners, commercial and mixed-use developers, institutional healthcare clients, and public/community institutions (universities, aquariums, retirement communities). Its go-to-market is direct enterprise field sales driven by the founder's network across Sun Valley and New York City; the corporate website (hennessyco.com) is the primary digital funnel. With 11-50 employees, the firm operates as a boutique, founder-owned platform with two operating geographies (Idaho primary, New York secondary) and no disclosed external capital or institutional investors.

Name

Hennessy Company

Legal name

Hennessy Co. Construction

Website

https://hennessyco.com

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

11–50 employees

Short description

Hennessy Company is a private construction, real estate development, and project management firm based in Hailey, Idaho, serving high-net-worth residential clients, mixed-use developers, and institutional customers with projects ranging from $7 million to $130 million in the Wood River Valley and select Northeast markets.

Ownership category

akta.pro rank

Headquarters

HQ city

Hailey

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Construction & Development Services: Hennessy Co. generates revenue through fixed-price or cost-plus construction contracts and real estate development mandates for residential, commercial, medical facilities, and mixed-use projects. Revenue is project-based and one-time per engagement, with project values ranging from $7 million to $130 million. The company serves as developer, project manager, or construction consultant depending on the engagement.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Hennessy Company is a construction, real estate development, and project management firm that plans and executes residential, commercial, medical, and mixed-use projects. It serves as developer, project manager, or construction consultant for individual property owners, developers, and institutional clients, with project values ranging from $7 million to $130 million. Its core focus is on large-scale, community-stewardship-driven builds in the Sun Valley/Wood River Valley region of Idaho with select projects in New York.

Product overview

Hennessy Co. is a construction, development, and project management company offering a portfolio of services including Real Estate Development, Project Management, and Custom Home Building. The company operates across residential developments (Thunder Springs, Golden Eagle, Quigley Farm, Elkhorn Springs, Elkhorn Springs Golf Lodges), custom homes (Quigley Farmhouse, Warm Springs Home), and commercial/public projects (Penn Club, The Osborn, New York Aquarium). Projects range from $7 million residential subdivisions to $130 million mixed-use developments, primarily focused in the Sun Valley/Wood River Valley region of Idaho with additional projects in New York.

Differentiator

Problem solved

Functional benefit

Products and services

• Real Estate Development Comprehensive real estate development services covering planning, execution, and client support for residential, commercial, medical facility, and retail projects. Offered to property owners and developers seeking partners to assemble and execute community-building developments.
• Project Management Professional project management services overseeing construction projects from concept to completion with tight organization, efficient communication, and quality control. Designed for developers, property owners, and institutional clients executing complex multi-component construction projects.
• Custom Home Building Bespoke residential construction service building custom homes tailored to client specifications in the Wood River Valley area of Idaho. Targeted at affluent individuals and families seeking custom-built luxury residences and spec homes.
• Thunder Springs Mixed-Use Development Mixed-use project with 70 high-end condominiums, commercial office space, restaurant, health club, indoor tennis facility, indoor and outdoor pools, and 9-hole golf course in Ketchum, Idaho, valued at $120,000,000. Described as the largest real estate development in Ketchum history.
• Elkhorn Springs Mixed-Use Redevelopment $130,000,000 mixed-use redevelopment of the former Elkhorn Hotel and Resort in Sun Valley, Idaho, featuring 145 condominium and townhome units, 11,000 sf of commercial space, a major renovation of the Robert Trent Jones Golf Course, and a new Golf Club House.
• Elkhorn Springs Golf Lodges Golf lodge residences within the Elkhorn Springs development, featuring residential suites, condominiums, and penthouses on a 10-acre site adjacent to the 18-hole Elkhorn Golf Course in Sun Valley, Idaho.
• Quigley Farm / Quigley Canyon Neighborhood Development Nearly 300-acre neighborhood development in Hailey's Quigley Canyon combining residential, agricultural, recreational, and educational facilities, designed around economic, social, and environmental ideals. Phase 1 sold out; Phase 2 available for reservations.
• Golden Eagle Ranch Subdivision Infrastructure 44-lot high-end residential subdivision in Blaine County, Idaho, with $7,000,000 of infrastructure installation covering fire and irrigation systems, potable water, 16 acres of lakes, and approximately 2 miles of roads.
• Quigley Farmhouse Custom Home Custom-built farmhouse residence showcasing quality construction and design in the Wood River Valley of Idaho, built as a Hennessy Co. custom home.
• Warm Springs Custom Home Custom residential home construction project in the Wood River Valley featuring high-quality finishes and design.
• Penn Club Reconstruction Seven-year reconstruction of a landmark alumni club building for the University of Pennsylvania in New York City, involving removal and reconstruction of the top three floors of a 16-story building, valued at $22,000,000. Winner of the New York Preservation Award from the Municipal Art Society and the Associated General Contractor's Build New York Award.
• The Osborn Retirement Community Construction Construction of Westchester County's premier retirement community on 56 acres in Rye, New York, with an 80,000 sf apartment building, 60,000 sf nursing home, and 26 garden homes, valued at $32,000,000. Employed 150–350 tradespeople per day at peak.
• New York Aquarium Marine Mammal Exhibit Construction Construction of a 300-foot-long marine mammal and pinniped exhibit at the New York Aquarium depicting the Northwest coast of North America, featuring six pools ranging from 18,000 to 180,000 gallons with an underwater viewing gallery, valued at $21,000,000. Winner of the Concrete Industry Board Award of Excellence.

Quantifiable outcome

• Award-winning construction: New York Preservation Award (Municipal Art Society), Concrete Industry Board Award of Excellence, Associated General Contractor's Build New York Award
• +2 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators9 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Wright Brothers, The Building Company: Eagle, Idaho-based commercial and residential general contractor with strong presence in luxury custom home and resort community construction in the Sun Valley and Boise markets. Closely comparable in custom/luxury residential segment.
• Hawkins Construction: Boise-based commercial general contractor serving Idaho and the Mountain West across healthcare, education, hospitality, and mixed-use projects. Comparable in project type and regional scale to Hennessy.
• Engineered Structures Inc. (ESI): Boise, Idaho-based general contractor delivering commercial, healthcare, and institutional construction across the Pacific Northwest. Closest regional direct peer given shared Idaho geography and comparable commercial/institutional project mix.
• McAlvain Companies: Idaho-based commercial contractor specializing in healthcare, education, hospitality, and large-scale community developments. Comparable in regional footprint and large mixed-use project delivery.

Regional players

• Okland Construction: Salt Lake City-based general contractor delivering large-scale commercial, hospitality, healthcare, and mixed-use projects across the Mountain West. Comparable in project scale (multi-hundred-million-dollar projects) and resort/hospitality capability.
• Big-D Construction: Salt Lake City-headquartered national contractor with Mountain West roots delivering commercial, hospitality, healthcare, and mixed-use developments. Comparable in resort-community and mixed-use delivery model.
• Jackson Hole Land Trust / Old West Construction ecosystem: Other boutique luxury resort-region developers/builders operating in Jackson Hole, Aspen, and Sun Valley serving HNW residential and resort mixed-use demand. Comparable in niche luxury resort-market construction and development model.

Broad incumbents

• Layton Construction: Sandy, Utah-based national general contractor delivering large commercial, hospitality, healthcare, and mixed-use projects across the U.S. Comparable in large-scale mixed-use/resort delivery but operates at materially greater scale and geographic breadth.
• Clark Construction Group: Bethesda, MD-based national general contractor delivering landmark commercial, institutional, healthcare, and mixed-use projects (including preservation work). Comparable in award-winning institutional/landmark delivery and project management scale.
• Mortenson Construction: Minneapolis-headquartered national builder-developer delivering commercial, healthcare, hospitality, and renewable energy projects with integrated real estate development capability. Comparable as a full-service developer-builder but at much larger scale and broader geography.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/hennessy-co

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Hennessy Company