HELIX Environmental Planning

What They Do

Mold TestingFire and Smoke

• Clean air act services
• Environmental due diligence
• Resource planning
• Solid waste planning
• Air Pollution Analyses
• Arboricultural Surveys
• Arborist Services
• Archaeological Consulting
• Archaeological Studies
• Archaeological Surveys
• Architectural Design
• Archival Research
• Biological Assessments
• Biological Consulting
• Biological Monitoring
• Biological Resource Studies
• Biological Surveys
• Botanical Surveys
• Building Design
• Ceqa Compliance
• Climate Action Plans
• Commercial Developments
• Community Impact Assessments
• Compliance Documentation
• Compliance Monitoring Programs
• Concept Design
• Conceptual Design
• Conditions Assessment

In Their Own Words

HELIX Environmental Planning, Inc. (HELIX) is an employee-owned, environmental consulting firm established in 1991 and with offices in San Diego, Los Angeles, Orange, Riverside, Sacramento, and Placer counties and the Bay Area. The firm has extensive experience helping clients comply with local, state, and federal environmental laws and regulations; manage natural and cultural resources; and design and construct sustainable projects. HELIX’s in-house services include CEQA/NEPA compliance, biological studies, cultural resource studies, architectural history, habitat restoration, landscape architecture, regulatory permitting, environmental compliance and mitigation monitoring, and air quality/greenhouse gas and noise studies.

Written by the business on its public profile. We have not verified these claims.

Before You Call HELIX Environmental Planning

1. Do you also do remediation? If so, who checks your work?
2. How many air samples will you take, and will you take an outdoor control sample?
3. How will you deal with smoke odor inside wall cavities and the HVAC ducts?
4. Do you do contents pack out, and will I get an itemized inventory?

Ask for the company’s California contractor license number and look it up with the Contractors State License Board. Also ask for proof of insurance and industry certification for the technicians doing the drying or mold work.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• Call a proMold Testing, When It Is Worth It and How to Read a Lab ReportWhen a mold test is worth paying for, which kind to ask for, why store kits mislead, and how to read spore counts, outdoor controls and a lab report yourself.
• Call a proThe First 48 Hours After a House FireWhat to do in the first two days after a house fire. Safe re-entry, utilities, insurance calls, securing the home, food, medicine and what never to clean.
• DIY with careAttic Mold on Roof Sheathing, Causes and FixesWhy mold grows on attic roof sheathing, how to find the cause, the fixes that stop it for good, and how to tell a cosmetic stain from a roof that needs work.
• Call a proElectrical Safety After Water or Fire DamageHow to stay safe around electricity after a flood, leak or fire. When to shut off power, when to call the utility, what to replace and the warning signs.