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Dillon Electric vs Marelich Mechanical
Contra Costa Electrical Contractors Comparison · Updated March 2026
Both contractors are equally credentialed veterans with 27 years of experience, but they serve different trades—electrical versus mechanical.
| Dillon Electric | Marelich Mechanical | |
|---|---|---|
| Rating | ★ 5.0 | ★ 5.0 |
| Years Licensed | 27 years | 27 years |
| License # | 757173 | 752638 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Oakley, CA | Martinez, CA |
| Website | — | www.marelich.com |
Key Differences
Consider Dillon Electric if...
- ✓ You need electrical work such as panel upgrades, circuit installation, lighting projects, or electrical troubleshooting and repairs
- ✓ Your project location is in or near Oakley, potentially reducing travel time and trip charges
- ✓ You're planning electrical renovations, rewiring, or code compliance work that requires licensed electrical expertise
Consider Marelich Mechanical if...
- ✓ You need mechanical work such as HVAC installation, heating and cooling system repairs, or ductwork modifications
- ✓ Your project location is in or near Martinez, potentially offering faster response times
- ✓ You're addressing mechanical system failures, efficiency upgrades, or ventilation issues requiring specialized mechanical trade knowledge
Questions to Ask Before Hiring
- → Can you provide three recent references for projects similar in scope to mine, including contact information?
- → How long has your current crew been working together, and who specifically will be on-site for my project?
- → What is your typical timeline from initial assessment to project completion for work like mine?
- → Can you walk through how you handle unexpected complications or additional work that may be discovered during the project?
The Bottom Line
This comparison comes down to one simple question: do you need an electrician or a mechanical contractor? Both Dillon Electric and Marelich Mechanical are equally credentialed 27-year veterans with proper insurance and bonding. If your project involves electrical work, choose Dillon Electric. If it involves HVAC or mechanical systems, choose Marelich Mechanical. Given the limited review history for both, invest time in checking their references carefully and having detailed conversations about your specific project before signing a contract.
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Frequently Asked Questions
California requires separate licenses for electrical and mechanical work because they involve entirely different systems, code requirements, and safety considerations. An electrical contractor cannot legally perform mechanical work and vice versa. Choose based on whether your project involves electrical systems or mechanical systems like HVAC.
Yes, both contractors have maintained continuous licensing since 1998, demonstrating they've successfully navigated nearly three decades of code changes, technology evolution, and business challenges in their respective trades. This longevity suggests stability and sustained competence in their specialized fields.
Limited online review history is worth noting but not disqualifying for established contractors. Many veteran contractors rely on word-of-mouth and repeat business rather than online platforms. Compensate by requesting multiple recent references and checking those thoroughly before making your decision.
No, both carry workers compensation insurance and hold $25,000 bonds, providing identical baseline protection. Both have active licenses in good standing with the state, meaning they meet all current California contractor requirements for financial responsibility and consumer protection.
Looking for the Best?
See our ranked list of top electrical contractors in Contra Costa.
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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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