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Sierra Valley Mechanical vs Rex Moore
Sacramento General Contractors Comparison · Updated March 2026
Sierra Valley Mechanical brings nearly a decade more experience and extensive residential HVAC expertise, while Rex Moore specializes in commercial and industrial electrical work.
| Sierra Valley Mechanical | Rex Moore | |
|---|---|---|
| Rating | ★ 5.0 | ★ 3.7 |
| Years Licensed | 22 years | 13 years |
| License # | 826606 | 976827 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Rancho Cordova, CA | Sacramento, CA |
| Website | www.sierravalleymechanical.com | www.rexmoore.com |
Key Differences
What Customers Say
Sierra Valley Mechanical
Customers consistently praise punctual service, professional technicians who explain work clearly, responsive scheduling with same-day availability, and honest assessments without pressure tactics.
Key Takeaway: Sierra Valley Mechanical has extensive residential customer feedback spanning decades while Rex Moore has no visible residential customer base, reflecting fundamentally different market focuses.
Customer Reviews
Sierra Valley Mechanical
Excellent customer service.. I had a minor issue with my hybrid, hot water heater. They made an appointment very quickly, and it took less than an hour for Bobby to fix.. I had expected the worse, b...
Very informative as to what the issue was with our A/C. Found out how we could HELP prevent this from happening again. The issue was the compresser.
Excellent support, service, and installation! Sierra Valley Mechanical helped me plan my home electrification project (thank you, Matt), supported me through the paperwork to secure rebates and incent...
Rex Moore
Quality service and very professional.
Great company
#1 Electrical contractor in Sacramento and #40 in Nation for design/build electrical services.
Consider Sierra Valley Mechanical if...
- ✓ You need HVAC services including heating, cooling, heat pump installation, mini-splits, or whole house fans, which are Sierra Valley's core competencies
- ✓ You value customer service attributes like responsive scheduling, same-day availability, and technicians who explain work clearly without pressure tactics
- ✓ Your project involves utility rebate programs like SMUD electrification incentives, where Sierra Valley has documented participation
- ✓ You want a contractor with extensive residential customer feedback demonstrating consistent service quality over time
Consider Rex Moore if...
- ✓ Your project is a large-scale commercial or industrial electrical installation requiring design/build capabilities
- ✓ You need three-phase power installation, commercial electrical systems, or industrial facility electrical work
- ✓ You operate a commercial property or industrial facility rather than a residence
- ✓ You're comfortable hiring a contractor without residential customer feedback and are willing to thoroughly vet their residential capabilities directly
Questions to Ask Before Hiring
- → Ask Rex Moore directly about their residential project volume, recent homeowner references, and whether residential work represents a significant portion of their business
- → Ask Rex Moore if their crew has experience with residential code requirements and typical home electrical projects, as their background is commercial and industrial
- → Ask Sierra Valley Mechanical about their electrical service response times and crew qualifications for your specific electrical project compared to their HVAC work
- → Request recent references from both companies for projects similar in scope to yours to confirm the right match
The Bottom Line
If you need HVAC services or residential electrical work integrated with heating and cooling systems, Sierra Valley Mechanical is the clear choice with 22 years of documented residential expertise and consistent customer feedback. If your project is purely electrical and residential in nature, Rex Moore's commercial and industrial focus makes them a poor match unless they can demonstrate substantial residential experience and references you haven't found. For commercial or industrial electrical projects, Rex Moore's design/build capabilities make them the appropriate choice. Don't hire Rex Moore for residential work without thoroughly vetting their home service capabilities directly.
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Frequently Asked Questions
Legally, yes—their California electrical license covers residential work. However, commercial electrical contractors often focus on different systems, codes, and project management approaches than residential service electricians. Without residential customer feedback or documented home projects, you'd need to verify their residential capabilities, crew experience with home electrical systems, and service model directly before hiring.
Sierra Valley Mechanical performs residential electrical work including EV charger installations and electrical components of HVAC projects, with customer feedback spanning 22 years. For integrated projects like heat pump installations requiring both HVAC and electrical work, they offer coordinated service. For complex standalone electrical projects, you might compare their electrical capabilities against dedicated residential electricians to ensure the right fit.
Yes, particularly in residential HVAC where Sierra Valley's 22 years means experience with multiple equipment generations, changing refrigerants, evolving efficiency standards, and building code updates. This depth helps with diagnosing older systems, understanding compatibility issues, and recommending appropriate replacements. For commercial electrical work, Rex Moore's 13 years establishes competency in their specialized market.
Commercial and industrial contractors often work through property managers, facilities directors, and general contractors rather than direct customer relationships that generate online reviews. Their absence of residential reviews likely reflects their commercial focus rather than service quality issues. However, this makes them difficult to evaluate for residential homeowner projects where customer feedback is typically available.
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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 11, 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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