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Cooper Oates Air Conditioning vs Thompson Plumbing
Sacramento Plumbing Contractors Comparison · Updated March 2026
You're comparing an HVAC specialist with 35 years experience to a plumbing contractor with 9 years and no workers comp on file.
| Cooper Oates Air Conditioning | Thompson Plumbing | |
|---|---|---|
| Rating | ★ 4.8 | ★ 4.4 |
| Years Licensed | 35 years | 9 years |
| License # | 611351 | 1028731 |
| Workers' Comp | ✓ Yes | — |
| Bond Amount | $25,000 | $25,000 |
| Location | Sacramento, CA | Fair Oaks, CA |
| Website | www.coacair.com | — |
Key Differences
What Customers Say
Cooper Oates Air Conditioning
Commercial and institutional clients consistently praise Cooper Oates for systematic communication, photographic documentation of issues, and prompt response times with knowledgeable technicians.
Thompson Plumbing
Residential customers highlight Thompson Plumbing's emergency availability including weekends, thorough explanations of needed work, and pricing below expected rates, though many note difficulty connecting due to high demand.
Key Takeaway: Cooper Oates demonstrates process-driven service delivery for commercial clients with documented procedures, while Thompson operates as a high-demand, owner-responsive residential service with flexibility but scheduling challenges.
Customer Reviews
Cooper Oates Air Conditioning
An Absolute Triumph of Temperature Control! Cooper Oates are Artisans of Air! Where does one even begin to articulate the profound, life-altering experience of working with Cooper Oates Air Condition...
Wish i could give 6 stars. I am a director of an upscale senior living community and the Cooper Oats team is amazing. They truly go the extra mile for you. They have taking care of so much for me I d...
As a former restaurant owner and now a manager overseeing equipment and repairs for 22 restaurants and other buildings on Sac State campus, I know how quickly work requests can pile up. Finding reliab...
Thompson Plumbing
Impeccable. Ryan is absolutely the best man for the job..and his rates are ridiculously less than expected! So win/win! He is extremely busy (understandably), so it is difficult to connect with him...
A great guy helped us with the clogged sink and bathroom.
They did a great job, provided great value, and they're really nice. I'll definitely use them again. We had two showers backing up and we couldn't fix it ourselves. These guys fixed the problem
Consider Cooper Oates Air Conditioning if...
- ✓ You need HVAC service or repair and want a contractor with workers compensation coverage protecting you from liability
- ✓ Your heating or cooling system is older or complex, where 35 years of diagnostic experience matters for identifying hidden damage
- ✓ You're managing a commercial property or institutional facility where documented service records and systematic processes are important
- ✓ You value established vendor relationships and consistent crew familiarity with your equipment
Consider Thompson Plumbing if...
- ✓ You need plumbing work (not HVAC) and are willing to verify liability coverage directly given the lack of workers comp on file
- ✓ You have an emergency plumbing situation and need weekend or after-hours availability with owner response
- ✓ You prefer direct communication with the business owner throughout the project
- ✓ Reasonable pricing is a priority and you're comfortable with the risks associated with missing workers compensation insurance
Questions to Ask Before Hiring
- → For Thompson Plumbing: Ask directly about liability insurance coverage and confirm whether your homeowner's policy covers contractor injuries if workers comp is absent
- → For Thompson Plumbing: Given high demand affecting availability, ask about realistic scheduling timelines for non-emergency work
- → For Cooper Oates: Confirm they service residential properties if your project is home-based, given their strong commercial client focus
- → Ask both contractors for references from projects similar in scope and complexity to yours
The Bottom Line
These contractors serve different trades, so choose based on whether you need HVAC or plumbing work. If you need HVAC service, Cooper Oates offers substantially more experience and full insurance protection. If you need plumbing, Thompson Plumbing is your option here, but address the workers comp gap immediately—call your homeowner's insurance to verify coverage and request liability insurance documentation from Thompson before work begins. Don't proceed with any contractor lacking workers comp until you've confirmed you're protected from injury liability.
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Frequently Asked Questions
If a contractor's employee is injured on your property and the company lacks workers compensation insurance, you could be held liable for medical costs and lost wages depending on your homeowner's policy. Cooper Oates carries workers comp, eliminating this risk. With Thompson Plumbing, you need to verify your own insurance coverage and ask about their liability policy before work begins.
Yes, particularly for complex diagnostics. A contractor with 35 years has encountered virtually every system failure scenario, hidden damage pattern, and complication that can arise. They've also adapted through multiple technology generations. Nine years provides solid experience, but the gap is meaningful when unexpected issues surface during your project.
You can, but verify coverage first. Call your homeowner's insurance to confirm whether you're protected if a contractor without workers comp is injured at your home. If Thompson provides liability insurance documentation, that may offer protection. Don't skip this step even in emergencies—a serious injury could cost you tens of thousands in liability.
Thompson Plumbing focuses exclusively on residential plumbing with direct owner involvement and emergency availability. Cooper Oates serves commercial clients primarily but handles residential HVAC—confirm they prioritize residential work if that's your need. The trades are different, so your project type determines which contractor is appropriate regardless of residential focus.
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See our ranked list of top plumbing contractors in Sacramento.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 13, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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