Skip to content
RadonProsFind · Compare · Decide

Best Radon Contractors in Oakland, California (2026)

Ranked using real Google ratings, review counts, and certification data only.

Back to Oakland pageView California pageTake the assessment

#1

David A Grunat

Oakland, CA

View profile

Google rating: No Google rating available

Reviews: 0

Certifications: 2

Certifications

NRPP Measurement ProfessionalNRSB Mitigation Specialist

Services

MitigationresidentialCommercialreal estatenew constructionvapor intrusionradon testingradon mitigation
Call 5107560741Visit website

#4

Benjamin Schulte-Bisping

Oakland, CA

View profile

Google rating: No Google rating available

Reviews: 0

Certifications: 2

Certifications

NRPP Measurement ProfessionalNRSB Mitigation Specialist

Services

TestingCommercialPost-Mitigation Testingresidentialreal estateradon testingradon mitigationradon monitor
Call 5107730708Visit website

#5

PARTNER ASSESSMENT CORP.

Oakland, CA

View profile

Google rating: No Google rating available

Reviews: 0

Certifications: 1

Certifications

NRSB Measurement Technician

Services

TestingMeasurement
Call 5104075421Visit website

How We Rank Contractors in Oakland

Our ranking methodology is transparent and data-driven. Sponsored placements are clearly labeled and appear separately — they do not influence organic ranking position.

  1. Google rating — Higher average ratings rank higher. This reflects real customer satisfaction across verified Google Business profiles.
  2. Review volume — More reviews break ties between similar ratings. A 4.8 with 50 reviews outranks a 4.8 with 3 reviews because the signal is more reliable.
  3. Certification count — NRPP and NRSB certifications break remaining ties. More certifications indicate broader competency across mitigation, measurement, and specialized techniques.
  4. Data integrity — All ranking data comes from verified sources: Google Business API, NRPP/NRSB certification databases, and contractor websites. Template-generated or unverifiable data is excluded.

Read our full methodology for details on data sourcing, verification, and quality thresholds.

Related Pages

All contractors in Oakland (7)All contractors in CaliforniaMitigation cost in CaliforniaTesting cost in CaliforniaCost calculator tool

FAQ

Who is the best radon contractor in Oakland?

David A Grunat is currently ranked #1 in Oakland based on Google rating, review volume, and certification count from our verified data sources.

How many radon contractors are in Oakland?

We currently list 7 radon contractors in Oakland, California. 7 hold NRPP or NRSB certifications and 3 have Google reviews.

What should I look for when choosing a radon contractor?

Focus on strong ratings with meaningful review volume, current professional certifications (NRPP or NRSB), and clear service coverage for your home type. A good contractor will assess your specific foundation and provide a written scope that includes suction point count, pipe routing, fan specification, and post-mitigation testing.

How are these Oakland contractors ranked?

We rank contractors using a transparent, data-only methodology: Google rating first, review count second, and certification count third. Sponsored placements appear in a separate, clearly labeled section and do not influence organic ranking position. All ranking data comes from verified sources including Google Business profiles and national certification databases.

Should I get multiple quotes in Oakland?

Yes. With 7 contractors in Oakland, getting at least two written quotes is practical and recommended. Compare the number of suction points, fan model, pipe routing plan, warranty length, and whether post-mitigation testing is included. Price alone is not a reliable differentiator — system design matters more for long-term radon reduction.