Spectrum General Contractors
Spectrum General Contractors is a second-generation, family-owned general contracting firm in Denver, Colorado, delivering commercial, historic preservation, restaurant, civic, and residential construction across Colorado's Front Range, supported by three in-house specialty fabrication shops.
- Company typePrivate
- Founded1970
- HeadquartersDenver, United States
- Headcount51–100
- GTM typeB2B
- OfferingServices
What Spectrum General Contractors does
Spectrum General Contractors is a second-generation, family-owned general contracting firm headquartered in Denver, Colorado, founded in 1978 and operating across Colorado's Front Range and Northwest Mountain Region. The firm delivers commercial construction, historic building preservation, restaurant construction, civic project contracting, and residential general contracting services. Its differentiation is built on three vertically integrated in-house specialty shops: a 6,000 square foot ornamental and structural steel fabrication yard, a 12,000 square foot millwork and carpentry shop, and a dedicated historic window, door, and millwork restoration shop that operates to National Parks Service and Secretary of the Interior's Standards.
The company's revenue model is project-based, one-time contract work sourced through direct engagement with property owners, architects, developers, and public entities. Pricing is bespoke and not publicly disclosed; there is no software or SaaS revenue component. Spectrum's customer base spans hospitality (Postino, Denver Beer Co, Snooze, Oskar Blues, Chipotle), government (City of Denver, History Colorado, National Park Service), technology (Asana), sports (Denver Nuggets), and nonprofit/arts clients (Wonderbound). Notable projects include the Colorado State Capitol House and Senate Chambers restoration, the Larimer Square historic storefront and window restoration across 19 buildings, the Beaver Meadows Visitor Center renovation in Rocky Mountain National Park, and the Wonderbound Dance adaptive reuse.
The firm employs more than 70 staff organized under three senior project managers and five full-time project managers, with a craft-labor bench spanning certified steel fabricators and master carpenters. Distribution is entirely regional and direct, with go-to-market driven by portfolio showcasing, awards-based credibility, architect and owner referrals, and government/municipal procurement. Spectrum carries 35+ regional design and historic preservation awards, including multiple Mayor's Design Awards and Historic Denver Awards, but operates with no disclosed external capital, no parent company, and no public listing.
Spectrum General Contractors firmographics
Firmographics- Name
- Spectrum General Contractors
- Legal name
- Spectrum General Contractors
- Website
- https://spectrumgc.com
- Company type
- Private
- Founded year
- 1970
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Spectrum General Contractors is a second-generation, family-owned general contracting firm in Denver, Colorado, delivering commercial, historic preservation, restaurant, civic, and residential construction across Colorado's Front Range, supported by three in-house specialty fabrication shops.
- Ownership category
- akta.pro rank
Spectrum General Contractors industry classification
Industry- Product category
- General Construction Services
- NAICS
- Specialty Trade Contractors (238), Other Specialty Trade Contractors (2389), Glass and Glazing Contractors (238150)
- SIC
- General Bldg Contractors - Nonresidential Bldgs (1540), General Bldg Contractors - Residential Bldgs (1520), Construction - Special Trade Contractors (1700)
- akta.pro primary industry
- Self-Performing General Contractors (IMAFAAAI)
- akta.pro secondary industries
- Commercial General Contracting (New Build) (IMAFAAAA), Residential General Contracting (New Build) (IMAFAAAB), Public Works General Contracting (IMAFAAAG)
Keywords
Where Spectrum General Contractors is headquartered
LocationHeadquarters
- HQ city
- Denver
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Spectrum General Contractors business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Marketing or Sales, Infrastructure
Revenue model
- General Contracting Services: Project-based revenue from commercial, historic, restaurant, civic, and residential construction projects. Includes construction management, general contracting, and craft labor services.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels2 records
Spectrum General Contractors product offering
Product offeringCore offering
Spectrum General Contractors is a Denver-based general contracting firm providing commercial construction, historic building preservation, restaurant construction, civic project contracting, and residential general contracting across Colorado's Front Range. The firm self-performs specialized scopes through three in-house shops (ornamental and structural steel, custom millwork and carpentry, and historic window, door, and millwork restoration) that fabricate and install custom architectural components directly on projects.
Product overview
Spectrum General Contractors is a second-generation, family-owned general contracting firm based in Denver, Colorado, with over 45 years of experience. The company operates a unified general contracting service portfolio complemented by three in-house specialty shops (Steel Shop, Millwork/Carpentry Shop, and Historic Window/Door Restoration Shop) that enable self-performance of highly detailed fabrication and restoration work. The core services include Commercial Construction, Historic Building Preservation, Restaurant Construction, Civic Project Contracting, and Residential General Contracting. The in-house shops allow the company to control quality, lead times, and schedules for specialized components like ornamental steel, custom millwork, and historic window restoration.
Differentiator
Problem solved
Functional benefit
Products and services
- Commercial Construction General contracting services for commercial construction projects including ground-up construction, major renovations, and HVAC and structural retrofits for commercial property owners in the Denver metropolitan area.
- Historic Building Preservation Specialized historic preservation and adaptive reuse services including restoration of historic millwork, trim, windows, doors, ornamental metal, and fixtures, with expertise in Secretary of the Interior's Standards compliance for owners of historic and landmark buildings.
- Restaurant Construction Restaurant tenant improvement and construction services for restaurant operators including budget management, kitchen equipment coordination, hood and ANSUL systems, and full grease interceptor installation across the Denver metro area.
- Civic Project Contracting Civic construction services for public entities including comprehensive historic restorations, and park and landscape construction, with experience in prevailing wage, bonding, and insurance requirements.
- Residential General Contracting Licensed residential construction services for residential property owners including construction defect repairs, full remodels, basement finishing, kitchen and bathroom remodeling, and new construction, combining custom craftsmanship with proven construction management.
- Ornamental & Structural Steel Custom ornamental and structural steel fabrication and installation services using in-house certified fabricators producing detailed railings, handrails, light fixtures, fencing, doors, custom stairs, bar fixtures, storefront elements, and complete structural packages, with access to a 6,000 square foot yard.
- Custom Cabinetry & Millwork Custom millwork and carpentry services from a 12,000 square foot shop staffed by experienced and master craftspeople, producing cabinetry, wainscot, storefront, arched doors, reception desks, rounded panel walls, suspended ceilings, pergola, fencing, display walls, and custom interior and exterior furniture.
- Window, Door & Historic Millwork Restoration Specialized window, door, and historic millwork restoration services from a dedicated shop, handling projects ranging from residences to large office buildings, including window sash restoration, frame repair, weather stripping, protective glazing installation, and integration of state-of-the-art technology with old world craftsmanship per National Parks Service and Secretary of the Interior's Standards protocols.
Quantifiable outcome
- Successfully delivered numerous award-winning projects including Colorado State Capitol restoration, Larimer Square historic preservation, and major restaurant builds
Companies that use Spectrum General Contractors
Customer profileNamed customers10 records
Segments5 records
Ideal customer profiles4 records
Spectrum General Contractors technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Spectrum General Contractors partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core.
- ArtspacecoreSpectrum partnered with Artspace on the Loveland Feed and Grain project, a creative-centric mixed-use property providing live/work housing for creatives. Worked alongside Artspace and Ratio to preserve the iconic agricultural building.
- Asana PartnerscoreProperty owner for Larimer Square restoration project, involving historic restoration of storefronts and windows across 19 buildings in historic downtown Denver.
- Semple Brown DesigncoreArchitectural firm for Wonderbound project - adaptive reuse of 1967 warehouse buildings into dance studio and performance venue.
- StanteccoreArchitectural firm for Livestock Exchange Building restoration project at National Western Complex.
- Tryba ArchitectscoreArchitectural firm for Cheesman Park Historic Residence - complete interior gut and historic restoration.
- Roth SheppardcoreArchitectural firm for Denchu Den project (Kizaki Denver and Margot) - new two-story ground-up construction.
- EUAcoreArchitectural firm for Colorado State Capitol House and Senate Chambers restoration project.
- Anderson HallascoreArchitectural firm for Beaver Meadows Visitor Center renovation in Rocky Mountain National Park.
- RatiocoreArchitectural firm for Loveland Feed and Grain project alongside Artspace.
- Perkins & WillcoreArchitectural firm for Larimer Square Miller Building renovation.
- Rowland+Broughton ArchitecturecoreArchitectural firm for Larimer Square Windows project - restoration of windows throughout historic Larimer Square block.
Scale indicators5 records
Recent moves6 records
Expansion highlights4 records
Spectrum General Contractors competitors and assessment
Company assessmentRegional players
- Adolfson & Peterson Construction: Mid-size regional GC with offices across the Mountain West and Midwest, focused on commercial, healthcare, and higher education. Competitor on similar commercial builds in Colorado and surrounding states.
- W.E. O'Neil Construction: Mid-size commercial general contractor with Denver office serving hospitality, multifamily, and commercial sectors. Comparable in scale and project types to Spectrum across the Mountain West.
Direct peers
- Pinkard Construction Company: Lakewood, Colorado-based general contractor specializing in senior living, multifamily, and commercial construction. Competes for similar Front Range commercial projects as Spectrum.
- Saunders Construction: Centennial, Colorado-based general contractor serving the Front Range with commercial, healthcare, education, and civic construction. Direct competitor for commercial and civic projects in Spectrum's core Denver market.
- Haselden Construction: Centennial, Colorado-based commercial general contractor focused on healthcare, higher education, and commercial builds. Largest privately-held GC in Colorado, competing for similar commercial and civic projects.
- GE Johnson Construction Company: Colorado Springs-based general contractor with strong portfolio in commercial, hospitality, healthcare, and historic projects across the Rocky Mountain region. Overlaps with Spectrum on civic and commercial work.
- Catamount Constructors: Lakewood, Colorado-based general contractor serving commercial, hospitality, and multifamily sectors. Similar in scale and regional focus to Spectrum, with comparable client mix.
- Mark Young Construction: Denver-based general contractor with restaurant, hospitality, and commercial tenant improvement expertise. Direct competitor for restaurant construction and commercial TI work that is a Spectrum specialty.
Broad incumbents
- Hensel Phelps: National employee-owned general contractor headquartered in Greeley, Colorado. Much larger and broader, but competes for major commercial, aviation, and civic projects in the Colorado market.
Others
- tryba architects / Tryba Architects (architect peer): Denver-based architecture firm and named Spectrum partner on the Cheesman Park Historic Residence project. Included as an ecosystem relationship illustrating the architect-GC dynamic that drives commercial and historic project flow in the Denver market.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Spectrum General Contractors social profiles
Digital presenceSpectrum General Contractors financial estimates
Financial estimateRevenue estimate
Valuation estimate
Spectrum General Contractors leadership team
Management profileNumber of profiles
Profiles9 records
Spectrum General Contractors subsidiaries and ownership
Company hierarchySubsidiaries3 records
Spectrum General Contractors funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Spectrum General Contractors 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 Spectrum General Contractors
What does Spectrum General Contractors do?
Spectrum General Contractors is a Denver-based general contracting firm providing commercial construction, historic building preservation, restaurant construction, civic project contracting, and residential general contracting across Colorado's Front Range. The firm self-performs specialized scopes through three in-house shops (ornamental and structural steel, custom millwork and carpentry, and historic window, door, and millwork restoration) that fabricate and install custom architectural components directly on projects.
Is Spectrum General Contractors a public or private company?
Spectrum General Contractors is a private company. It is classified as family owned and is currently operating.
When was Spectrum General Contractors founded?
Spectrum General Contractors was founded in 1970. It employs 51 to 100 people.
Where is Spectrum General Contractors based?
Spectrum General Contractors is headquartered in Denver, United States, in the North America region.
How does Spectrum General Contractors make money?
One revenue line is on record: general Contracting Services.
Who are Spectrum General Contractors's main competitors?
Regional players on record are Adolfson & Peterson Construction and W.E. O'Neil Construction. Direct peers are Pinkard Construction Company, Saunders Construction, Haselden Construction, GE Johnson Construction Company, Catamount Constructors and Mark Young Construction. Hensel Phelps is listed as a broad incumbent. tryba architects / Tryba Architects (architect peer) is listed as an others.
Does Spectrum General Contractors have an API?
No public API is recorded for Spectrum General Contractors.
What industry is Spectrum General Contractors in?
Spectrum General Contractors's product category is General Construction Services. Its primary akta.pro industry code is IMAFAAAI, Self-Performing General Contractors, with a secondary code of IMAFAAAA, Commercial General Contracting (New Build). Its NAICS code is 238 and its SIC code is 1540.