Terra-Petra Company

What Terra-Petra Company does

Terra-Petra is a privately held environmental engineering firm founded in 2002 and headquartered in Los Angeles, specializing in subsurface environmental risks that affect whether complex development projects can be approved, scheduled, and built. The firm concentrates on three core service lines — methane consulting, vapor intrusion mitigation system (VIMS) design, and oil well due diligence — and operates a dedicated Waterproofing Division providing below-grade waterproofing design, building-envelope consulting, CQA/CQC inspections, and ASTM 7877-14-certified electronic leak detection (ELD) testing via a technology partnership with Detec Systems. Its technical delivery draws on registered Civil Engineers, Environmental Assessors, Geologists, and Certified Engineering Geologists, including the largest known in-house team of LADBS-certified Deputy Methane Barrier Inspectors (DMBI), enabling cross-trained methane and waterproofing inspection on a single mobilization.

The business is organized around project-based professional services engagements: fees are scope-specific and quoted per project for consulting (risk assessment, soil gas investigation, Phase I/II ESA), fixed-fee or percentage-of-construction-cost design work (methane barrier systems, VIMS, subslab depressurization, radon mitigation), and per-event inspection services (DMBI, waterproofing, CQA/CQC, oil well sniff testing, re-abandonment coordination with CalGEM/DOGGR). The firm serves enterprise customers — real estate developers, architects, attorneys, property owners, and government agencies — on high-profile and complex urban sites, with documented project work spanning Ritz-Carlton Residences at L.A. LIVE, Lakers Headquarters (El Segundo), Cedars-Sinai Medical Center, Wilshire Grand, Irvine Company multi-family developments, Porsche Experience Center, and Port of Los Angeles facilities.

Commercially, Terra-Petra operates a direct-to-customer model with no resellers or distribution channels, supported by a sustained conference-driven marketing motion (ICSC RECon, Environmental Law Conference at Yosemite, Vapor Intrusion Conference), executive thought leadership (Brownfield Braintrust Podcast appearances, AVIP speaking), PR via PRWeb and LA Business Journal placements, and website-driven lead capture. The firm has scaled from a single Los Angeles office in 2002 to five U.S. offices (Los Angeles, San Francisco, New York, Tacoma, Phoenix), with the Phoenix office added in February 2024 and a six-year-plus track record of LA Business Journal Top Environmental Engineering Firms recognition. Revenue, headcount, and ownership structure beyond founder/management control are not publicly disclosed.

Name

Terra-Petra Company

Legal name

Terra-Petra

Website

https://terra-petra.com

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

11–50 employees

Short description

Terra-Petra is a privately held environmental engineering firm founded in 2002 that helps developers, architects, attorneys, property owners, and government agencies mitigate subsurface risks — methane, vapor intrusion, legacy oil wells, and below-grade waterproofing — on complex U.S. development projects.

Ownership category

akta.pro rank

Product category

Environmental Engineering Consulting

NAICS

Environmental Consulting Services (54162), Testing Laboratories and Services (54138)

SIC

Services-Testing Laboratories (8734), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Geotechnical Design, Engineering & Consulting (Analysis, Design, Peer Review) (IMAFAOAK)

akta.pro secondary industry

Soil Vapor Intrusion (SVI) & Vapor Intrusion Assessment (EUAHAFAF)

Keywords

• Methane consulting services
• Vapor intrusion mitigation
• Oil well due diligence
• Environmental engineering consulting
• Below-grade waterproofing inspections

Headquarters

HQ city

Los Angeles

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Environmental Consulting Services: Professional consulting services for methane consulting, oil well due diligence, and environmental site assessments. These are project-based professional services with fees based on scope of work, site complexity, and regulatory requirements.
2. Mitigation System Design: Design services for vapor intrusion mitigation systems, methane barrier systems, and waterproofing systems. Design fees are typically fixed-fee or percentage of construction cost based on project requirements.
3. Inspection Services: Construction quality assurance/quality control inspections including Deputy Methane Barrier Inspections (DMBI), waterproofing inspections, and electronic leak detection testing. Billed per inspection event or project.
4. Oil Well Services: Oil well evaluation, leak testing, re-abandonment services, and vent cone design-build. Includes permitting coordination with CalGEM (California Geologic Energy Management Division).

Go-to-market motion2 records

Distribution channels2 records

Marketing channels9 records

Core offering

Terra-Petra is an environmental engineering firm that helps real estate developers, architects, and property owners build on complex sites impacted by subsurface environmental risks. The firm's core offerings include Methane Consulting (risk assessment, testing, mitigation design, regulatory support), Vapor Intrusion Mitigation System Design, Oil Well Due Diligence, and a Waterproofing Division providing building envelope and below-grade waterproofing design, inspection, and certified Electronic Leak Detection testing.

Product overview

Terra-Petra is an environmental engineering firm offering a portfolio of specialized consulting and inspection services centered on subsurface environmental risks that impact complex development projects. The core service offering spans three primary areas: Methane Consulting (including risk assessment, soil gas investigation, and mitigation design), Vapor Intrusion Mitigation System Design, and Oil Well Due Diligence. These core services are complemented and supported by a Waterproofing Division that provides building envelope and below-grade waterproofing design, inspection, and electronic leak detection (ELD) testing certified per ASTM 7877-14. Supporting sub-services include Deputy Methane Barrier Inspection (DMBI) certified by LADBS, CQA/CQC inspections, Phase I/II Environmental Site Assessments, oil well abandonment/reabandonment, radon mitigation, landfill monitoring, brownfield services, and geology/hydrogeology assessments. The company operates a team of registered professionals including Civil Engineers, Registered Environmental Assessors, Registered Geologists, and Certified Engineering Geologists. Services are delivered across offices in Los Angeles, San Francisco, New York, Tacoma, and Phoenix for projects throughout the United States.

Differentiator

Problem solved

Functional benefit

Brands

• Waterproofing Division: Below grade waterproofing, building envelope consulting, and inspection services operated as a distinct division of the company.

Products and services

• Methane Consulting

Quantifiable outcome

• Reduced membrane installation duration by approximately 50% for Ritz-Carlton project
• +4 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Detec SystemscoreTechnology or Integration · 20 October 2016Detec Systems provides training and certification to Terra-Petra's waterproofing team on their leak detection technologies including the Roof Membrane Integrity Scanner (RMIS). Terra-Petra is certified to conduct ELD testing throughout Southern California per ASTM 7877-14 using Detec equipment and technology.
• Gergen ConstructionminorImplementation/ SI/ Consulting PartnerTerra-Petra partnered with Gergen Construction for the Maple Street Correctional Facility project in Redwood City, CA. Terra-Petra provides methane and water intrusion inspections while Gergen handles system installation.
• Haselden ConstructionminorImplementation/ SI/ Consulting PartnerTerra-Petra is developing potential waterproofing design consulting project relationships with Haselden Construction based in Wyoming for hospital and construction projects in the Colorado/Wyoming region.
• Wactor & Wick LLPminorImplementation/ SI/ Consulting PartnerOakland-based environmental law firm hired Terra-Petra to perform methane soil gas investigation for a Methane Buffer Zone site in downtown Los Angeles. Terra-Petra was selected based on expertise and prior work throughout the Los Angeles Basin.
• IVCIAminorGTM or Marketing PartnerTerra-Petra served as Silver Sponsor of IVCIA (Industrial/Commercial Valuation Consultants Association).
• City of Hope Construction Industries AllianceminorGTM or Marketing PartnerTerra-Petra joined efforts with MVE + Partners to support the City of Hope Construction Industries Alliance Spirit of Life Gala, an event raising funds for cancer research.

Scale indicators7 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• SCS Engineers: Long-standing US environmental engineering firm with deep California presence in solid waste, vapor intrusion, and methane/LFG mitigation. Closely comparable to Terra-Petra's environmental consulting, methane mitigation, and site assessment work for developers.
• Haley & Aldrich: Geotechnical and environmental engineering firm serving complex development and redevelopment projects nationwide, with vapor intrusion, soil gas, and brownfield services. Comparable in client base (developers, architects) and specialty technical focus.
• Partner Engineering and Science: National firm offering environmental consulting, vapor intrusion, and due diligence services to real estate developers, lenders, and investors. Comparable in client profile (developers, property owners) and Phase I/II ESA offerings.
• Terraphase Engineering: California-based environmental engineering firm providing site assessment, vapor intrusion, and remediation services with similar regional focus on Bay Area and Los Angeles markets, overlapping directly with Terra-Petra's core services.
• AEI Engineering: California-focused geotechnical and environmental engineering firm providing methane and vapor intrusion consulting, overlapping directly with Terra-Petra's LA methane specialty and serving similar complex-site developers.

Broad incumbents

• Tetra Tech: Global environmental engineering and consulting leader with an extensive vapor intrusion and methane practice. Larger scale and broader service mix, but overlaps significantly with Terra-Petra on methane and vapor work for complex sites.
• AECOM: Global environmental and engineering services firm with a strong California practice in vapor intrusion, site assessment, and remediation. Significant scale and one-stop-shop appeal versus Terra-Petra's specialization.
• Arcadis: Global design and engineering consultancy with environmental site assessment and remediation practice. Overlaps with Terra-Petra on complex-site environmental work for real estate and infrastructure clients.
• Montrose Environmental Group: Environmental services company focused on air quality, site assessment, and remediation with comparable niche overlap on vapor intrusion and environmental consulting for developers and property owners.
• GHD: Global engineering and environmental consulting firm with a growing vapor intrusion and brownfield redevelopment practice, overlapping with Terra-Petra on complex development and complex-site projects in the US market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/TerraPetraUSA

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 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 Terra-Petra Company