Terrapin Construction Group

National Footprint. Local Knowledge. Precision Delivery.

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About the firm

Terrapin Construction Group is a nationwide commercial general contractor and design-build firm headquartered in Denver, Colorado, founded in 2024 and licensed in all 50 states. TCG delivers in-house MEP engineering, architectural design, and structural engineering alongside full general contracting and construction management, integrating design and construction under a single contract. The engineers and architects serve cold storage, industrial, healthcare, food processing, cannabis cultivation, data center, life sciences, and pharmaceutical facility projects. MEP and architectural services are available as standalone engagements, with TCG serving as engineer of record or architect of record for owners with a separate general contractor.

Established
2024
Firm type
MEP · Architecture & Engineering · Structural Engineering · Design-Build

People

William C. GoodinFounder

Capabilities

MEP Engineering

Service website

Terrapin Construction Group provides full-scope MEP engineering from initial load calculations through commissioning support, integrated within design-build delivery or as standalone services with engineer-of-record responsibility, in all 50 states.

  • Mechanical Engineering

    HVAC system design, ventilation, refrigeration, and thermal comfort analysis per ASHRAE standards.

    • Heating and cooling load calculations
    • HVAC system selection and sizing
    • Ductwork and piping layout
    • Ventilation per ASHRAE 62.1
    • Refrigeration and process cooling
    • Building automation and controls
    • Energy modeling per ASHRAE 90.1
  • Electrical Engineering

    Power distribution, lighting, fire alarm, telecom, and low-voltage systems per NEC/NFPA 70.

    • Electrical load analysis and service sizing
    • Power distribution and panelboards
    • Lighting design and controls
    • Emergency and standby power
    • Fire alarm per NFPA 72
    • Telecom and data cabling
    • Lightning protection and grounding
  • Plumbing and Fire Protection

    Domestic water, sanitary waste, storm drainage, gas piping, and fire suppression per IPC and NFPA 13.

    • Domestic water system design
    • Sanitary waste and vent systems
    • Storm drainage and roof drains
    • Natural gas piping
    • Fire sprinkler and standpipe
    • Medical gas systems
    • Process piping and specialty drainage

Architectural Design

Service website

Full-scope commercial architectural design from schematic through construction administration, following the AIA five-phase process, licensed in all 50 states. Standalone architectural services and design-build engagement models are both available.

Structural Engineering

Service website

Foundation, framing, and lateral system design for commercial and industrial buildings, including pre-engineered metal buildings.

Design-Build Services

Service website

Single-contract delivery integrating architectural design, MEP engineering, structural engineering, and construction under one team, compressing project schedules by 15-30% versus design-bid-build delivery with a single point of accountability.

Commercial General Contracting

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Full GC services across all 50 states for every commercial asset class.

Construction Management

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Owner-side project oversight, scheduling, and budget control.

Preconstruction Services

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Estimating, value engineering, and constructability review before ground breaks.

Owner's Representative

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Independent advocacy protecting owner equity through every project phase.

IMP Installation

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Insulated metal panel installation with over 1,000,000 square feet installed across 38 states for cold storage, food processing, cannabis, pharmaceutical, data center, and cleanroom applications. Manufacturer partnerships include PermaTherm, Arch Solar, Kingspan, Metl-Span, CENTRIA, AWIP, MBCI, FALK, and UPI Panels.

Pre-Engineered Metal Buildings

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PEMB design, supply, and erection for warehouses, industrial facilities, and retail.

Commercial Roofing

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TPO, EPDM, PVC, modified bitumen, metal, and roof restoration nationwide.

Commercial Flooring

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Polyaspartic, urethane cement, and resinous flooring systems for cannabis and food processing facilities.

Equipment Procurement

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Direct manufacturer relationships for HVAC, refrigeration, and FF&E procurement.

Industries

Commercial · Healthcare · Industrial · Manufacturing · Food & Beverage · Data Centers · Life Sciences · Pharmaceutical · Hospitality

Projects

Cold Storage IMP Facility - Southeast

Southeast, US · Food & Beverage

Project details

87,000 SF cold storage with ammonia refrigeration, blast freeze HVAC, high-amperage electrical, and IMP envelope. USDA first-inspection approval.

Medical Office Building - Houston, TX

Houston, TX · Healthcare

Project details

Full MEP for 32,000 SF multi-tenant MOB: dedicated HVAC for imaging, medical gas, 600A service with generator, ASHRAE 170-compliant ventilation.

Food Processing Plant - Midwest

Midwest, US · Food & Beverage

Project details

120,000 SF USDA-certified food processing plant. Process piping, washdown plumbing, dedicated exhaust. Energy modeling reduced annual HVAC operating cost by 28%.

Pharma Cleanroom - Northeast

Northeast, US · Pharmaceutical

Project details

65,000 SF cGMP cleanroom. HVAC, electrical, and plumbing to meet ISO 14644 and FDA validation requirements. Commissioning passed first inspection.