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ASF Electric vs Gruber Plumbing
San Mateo Electrical Contractors Comparison · Updated March 2026
You're comparing an electrical contractor to a plumbing contractor—these companies serve completely different trades and cannot be compared for the same project.
| ASF Electric | Gruber Plumbing | |
|---|---|---|
| Rating | ★ 3.7 | ★ 4.0 |
| Years Licensed | 30 years | 35 years |
| License # | 720540 | 619639 |
| Workers' Comp | ✓ Yes | — |
| Bond Amount | $25,000 | $25,000 |
| Location | Daly City, CA | Moss Beach, CA |
| Website | www.asfelectric.net | www.gruberplumbing.com |
Key Differences
What Customers Say
ASF Electric
ASF Electric receives feedback highlighting worksite cleanliness and punctuality, though some customers report inconsistent communication responsiveness when scheduling or coordinating projects.
Gruber Plumbing
Gruber Plumbing earns strong praise for emergency response speed with 30-minute arrival times and hands-on owner service, but faces criticism regarding pricing transparency on certain repairs.
Key Takeaway: ASF Electric emphasizes operational consistency in service delivery while Gruber Plumbing prioritizes rapid emergency availability, reflecting different service models within their respective trades.
Customer Reviews
ASF Electric
Been working with them for years. They are knowledgeable, punctual, leave the job site clean, and have great customer service! Great for big or small jobs! They can do it all.
Gruber Plumbing
I was supposed to get on a plane the next morning at 6 am to leave town for a few weeks when my pipes backed up and all my bathroom drains were ready to overflow at 9 pm. Phil was the only person to ...
George was very helpful and we called him and within 30 minutes he was here at our home to help us. Although we are local, George was professional and got the job done quickly. We will definitely call...
Consider ASF Electric if...
- ✓ You need electrical work performed and want the protection of workers compensation coverage reducing your liability exposure
- ✓ You value contractors who consistently maintain clean worksites and arrive on schedule for electrical projects
- ✓ Your project timeline is flexible enough to accommodate potential communication delays when scheduling or coordinating work
- ✓ You're located in Daly City or nearby communities where ASF Electric is based and maintains established operations
Consider Gruber Plumbing if...
- ✓ You need emergency plumbing service and value rapid response times, particularly for urgent situations like drain backups before travel
- ✓ You're willing to verify workers comp coverage directly or ensure your homeowner's policy adequately covers contractor injuries on your property
- ✓ You want hands-on owner involvement in the work with direct access to the principals George and Phil
- ✓ You're prepared to request detailed pricing breakdowns upfront to avoid surprises on what some customers felt were expensive repairs
Questions to Ask Before Hiring
- → For Gruber Plumbing: Ask specifically about liability insurance coverage and verify whether your homeowner's policy covers injuries to uninsured contractors working on your property
- → For Gruber Plumbing: Request itemized pricing estimates before work begins, including parts markup and labor rates, to establish clear cost expectations
- → For ASF Electric: Ask about preferred communication methods and typical response times for scheduling and project updates given feedback about communication consistency
- → For both: Request references from projects in homes similar to yours in age and system complexity given their decades of experience with older properties
The Bottom Line
You're not actually choosing between these contractors—you need ASF Electric for electrical work and Gruber Plumbing for plumbing work. However, the workers compensation gap at Gruber Plumbing is a real liability concern you must address before hiring them. If you need plumbing service, directly confirm their insurance coverage and verify your homeowner's policy protects you if workers are injured. For electrical projects, ASF Electric provides the coverage protection you want, though establish clear communication expectations upfront. Both bring decades of experience to complex diagnostic work in older San Mateo County homes.
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Frequently Asked Questions
If a contractor without workers comp is injured on your property, your homeowner's insurance may become the primary coverage for their medical bills and lost wages, potentially raising your premiums or exhausting policy limits. Contractors with workers comp shift this liability to their own insurance carrier, protecting your financial exposure.
Both timeframes represent veteran-level experience with deep knowledge of older building systems and code changes over decades. The five-year difference is less significant than other factors like workers comp coverage and service responsiveness. Either contractor has seen enough variety to handle complex diagnostic challenges in aging homes.
The feedback suggests inconsistency rather than complete unavailability—some customers report good communication while others experienced difficulty reaching the company. If your project requires frequent coordination or has tight deadlines, confirm preferred communication channels and expected response times upfront to set clear expectations.
The review data shows mixed feedback with one customer expressing strong dissatisfaction about valve replacement costs while others focused on emergency response quality. Request detailed written estimates before work begins and compare pricing with other plumbers for similar scope to establish whether rates align with market standards for your specific project.
Looking for the Best?
See our ranked list of top electrical contractors in San Mateo.
Other San Mateo Electrical Contractors Comparisons
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 12, 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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