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  • Accurate Ratings

    Local companies rated
    Highest in Quality and Helpful Expertise™

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  • Deep Info™

    Researched company reports.
    Essential articles and videos by topic experts.


Barbara Schallau Consumer
Bay Area

Hany Louis CEO/General Manager
The Tile & Grout King Inc.

Jagdish Hegde Consumer

Leigh Bakhtiari President
City Carpets

Cecile Monfort Consumer
San Jose

Mark Corrallo President
All Seasons Construction

Jim Baylor Consumer
Bay Area

Bev Oliver Consumer
Bay Area

Gifford Teeple Owner
A Reliable Handyman

Tami Aviles Consumer
Bay Area

Tommy Herren Owner
The Lighting Geek

Watch this video on the Diamond Certified Resource: the most accurate and trustworthy way to find local companies rated Highest in Quality and Helpful Expertise.

We’ve all felt the joy of choosing a good local company and, unfortunately, the pain when we mistakenly choose a bad one. The problem is, every company claims to be good, yet despite these glowing claims some provide inconsistent quality while others are downright unscrupulous.

We’ve solved this problem for you with the Diamond Certified Resource. Only local companies independently rated Highest in Quality and Helpful Expertise™ earn Diamond Certified. Our rigorous rating and certification process starts with the in-depth pass/fail rating of each company’s customer satisfaction, license and insurances. Most companies can’t pass our rating and earn Diamond Certified, and every Diamond Certified company must continue to deliver on its promises to you, the consumer. That’s why we conduct ongoing customer satisfaction research and credential-based ratings and monitor each company’s performance.

Every Diamond Certified company is backed by our powerful Performance Guarantee, so you’ll feel confident in your choice when you use our always-free web resource or Diamond Certified Directory. If you try unsuccessfully to resolve a disagreement with a Diamond Certified company, our mediator will work with you and the company to attempt to reach an agreement that both parties can live with. If the mediation fails to produce a mutually agreeable solution due to failure of the Diamond Certified company to honor contractual obligations, uphold industry standards or participate in good faith, we will refund your purchase price up to $1,000.

Each time you visit, you’ll see each Diamond Certified company’s Deep Info, including researched company rating reports, verbatim survey responses, essential articles, photo galleries, videos and expert tips. We put all the information you need to choose a company in one place, and no other web page can match this depth of information.

When you choose a Diamond Certified company, you’ll never be fooled by fake or cherry-picked reviews because we survey a large, random sample of each company’s customers by telephone (typically 100 surveys) to get the most accurate ratings and verify only real customers are responding. Company owners can’t cherry-pick by telling friends and selected customers to post 5-star reviews on our site—we don’t allow it.

So, if you want quality, you’ll have confidence in choosing a Diamond Certified company. We encourage you to visit this website on a regular basis to find updated ratings on top rated companies in your area, see verbatim survey responses on each Diamond Certified company, and read thousands of industry-specific expert articles and tips. We care about customer satisfaction, and we care about you. We’re proud to give you all the information you need to choose with confidence.



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Each Diamond Certified Company Report gives you the most accurate and comprehensive Deep Info available for each company. It includes proof of Diamond Certified status, rating charts, verbatim survey responses, essential articles about the company, a capabilities table, a Diamond Certified Video Profile, key photos, company owner expert tip contributions and more. Click on the graphic to learn more


    We survey a large, random sample of each company’s customers by telephone to get the most accurate ratings...


    In addition to providing rating scores for Quality, Intent to Return and Helpful Expertise, each surveyed customer is...


    You get to see the company in action, meet the managers, and learn as they describe their specialties and customer...


    You can choose to scan or go deep into these five researched articles on each Diamond Certified company: Company...


    Each company’s key info is logically organized within this table. You’ll find this system of display gives...


    Top rated local company owners are experts in their fields, and they’ve written topic-based expert articles and created...


    If a picture is worth a thousand words, how about an entire portfolio? You’ll get a better sense of each company once...


    This is a good place to go if you want to do extra research on a company. Here you’ll find a link to each company’s...

House Calls: 5 Important Health Checkups for Your Home

Posted on September 20, 2018 by James Florence

If you think about it, there are a lot of similarities between your body and your home. For example, each contains a network of systems that allow the whole to function as needed. With a little imagination, you can draw parallels between your home’s plumbing, electrical and HVAC systems and your body’s circulatory, nervous, and respiratory systems. Read more

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Posted in: Plumbing, Roofing, Pest Control, Electrical, Home Maintenance, Fire Prevention, HVAC, Home Tips

Specialty Spotlight: Cabinet Refacing

Posted on September 18, 2018 by Suzanne Carroll

A complete kitchen renovation is expensive. The average cost is about $23,000, with high-end transformations costing upward of $50,000. The priciest part of these renovations is the cabinetry, as it requires significant planning, resources and labor to install. However, homeowners looking to save money and time may find that cabinet refacing is an easier and less expensive option for achieving the results they want.


What is cabinet refacing?

Cabinet refacing is a method of updating your cabinets without enduring the expense and hassle of ripping out the old ones. It’s different from simply painting over the old cabinets. During refacing, workers remove doors and drawers, sand down all the original cabinet surfaces, Read more

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Posted in: Home Remodeling, Specialty Spotlight
Tags: , ,

Wildfire Facts vs. Fiction

Posted on September 06, 2018 by Suzanne Carroll

This has already been a significant year for wildfires in California, with the Mendocino Complex Fire growing to the biggest in state history and Yosemite National Park closing to visitors for nearly three weeks. Unfortunately, the wildfire season isn’t over yet. In the Bay Area, we have at least another month until the autumn rains arrive, which means wildfires remain a risk for local residents. Read more

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Posted in: Fire Prevention
Tags: , , , ,

  • Amy S.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes

    The craftsmanship was beautiful. They did what they said they were going to do, they were always on time, and they were reliable.
    The whole experience was really nice and I felt like everything was done gorgeously.

    Response to Diamond Certified Company Cook's Kitchen & Bath, Inc.

  • D. C. M. I.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes

    They are a company with integrity.
    They are easy to get ahold of and they've never given me the runaround.


Kevin Comerford is president of Service Champions, a Diamond Certified company. He can be reached at (714) 777-7777 or by email.


Kevin Comerford: Taking the Lead

By James Florence, Diamond Certified Resource Reporter

PLEASANTON — Kevin Comerford has roots in the HVAC industry, but it took some time for him to realize his place in his family’s legacy. “My father, Don Comerford, started his business, Comerford Heating and Air, in 1971, so I basically grew up in the industry,” he recounts. “After graduating from Cal Poly with a degree in journalism, I went to work for the San Luis Obispo Chamber of Commerce. I enjoyed working with small-business owners so much that it renewed my interest in my parents’ business. I was also fascinated with the innovative developments that were happening in the HVAC industry at the time. Read more

Expert tip
5 Steps to Prepare Your HVAC System for Winter
PLEASANTON — Following the heat of summer and the mildness of fall, the cold winter weather brings an entirely different set of heating and ventilation needs for the home. To ensure your HVAC system is equipped for optimal performance, consider… Read more

Russell Calhoon is project manager at Paradigm Concrete & Construction, Inc., a Diamond Certified company. He can be reached at (925) 385-8993 or by email.


Russell Calhoon: A Firm Foundation

By James Florence, Diamond Certified Resource Reporter

ANTIOCH — By the time Russell Calhoon started working for a concrete contractor, he already had a firm foundation in the trades. “I’m a third-generation builder,” he explains. “I grew up in construction and worked for my dad from childhood all the way to adulthood. My dad taught me a lot, both on and off the jobsite. He actually taught apprenticeship classes on roof framing and stair framing at a local college, and I often went with him to those. We eventually became partners in a business that held licenses in foundation work, general construction, plumbing, electrical, solar power and sewer work.”

After his father retired, Read more

Expert tip
Often-Overlooked Aspects of a Concrete Project
ANTIOCH — If you’re planning a concrete project, be sure to consider the following aspects: Minimum cost Most concrete contractors have a minimum charge for concrete work. If you only have one small project in mind, it might not meet… Read more

Chris Hampton is owner of CDH Construction, a Diamond Certified company. He can be reached at (707) 207-6954 or by email.


Chris Hampton: A Simple Motivation

By James Florence, Diamond Certified Resource Reporter

ROHNERT PARK — Chris Hampton’s involvement in the construction trade began with a simple motivation. “I wanted to work outside,” he explains. “At the time, I had been working in warehouses and kitchens since I was 13, and I just knew it wasn’t for me. I started getting into outdoor work like landscaping and concrete, and I gradually gravitated toward fine carpentry like cabinets and trim work. In 2010, I started my own construction and home repair business, and I’m still running it today.”

Today, as owner of CDH Construction, Chris says his favorite part of his job is simply doing the work. Read more

Expert tip
Considerations for New Baseboards
ROHNERT PARK — If you’re planning to install new baseboards in your home, there are a couple of things you’ll need to consider. One is the type of material to be used. You essentially have two choices: authentic wood or… Read more

Kyle Barnhart is vice president of Mike Testa Plumbing, Inc., a Diamond Certified company. He can be reached at (415) 868-5917 or by email.


Kyle Barnhart: Gradual Growth

By James Florence, Diamond Certified Resource Reporter

SAN RAFAEL — Looking back on his plumbing career, Kyle Barnhart identifies a gradual progression of steady professional growth. “My entire career has basically been one big on-the-job learning experience,” he says. “It started in my childhood—my father was a plumber and he used to take me with him to jobsites. I always had an interest in the trade, especially the troubleshooting aspect. You really have to use your brain, and a lot of times, it’s like figuring out a puzzle. After high school, I got a job with a general contractor I knew and things took off from there. Read more

Expert tip
Maintaining Your Water Heater
SAN RAFAEL — Most water heater problems stem from a lack of routine maintenance. Over time, sediment and mineral buildup can inhibit a water heater’s efficiency and water flow, leading to subpar performance and even premature failure. Routinely flushing your… Read more

Oscar Sanchez is owner of Aqua Stat Plumbing, Inc., a Diamond Certified company. He can be reached at (510) 244-4660 or by email.


Oscar Sanchez: A Rewarding Career

By James Florence, Diamond Certified Resource Reporter

HAYWARD — When he first got into plumbing, Oscar Sanchez worried he’d made a mistake. However, looking back, he’s glad he decided to stick with it. “I like to say, ‘I didn’t choose plumbing, plumbing chose me,’” he laughs. “Partway through college, I got married and needed to make more money, so I decided to drop out of school and find a full-time job. I had a connection in the plumbing industry, so I became an apprentice. At first, I didn’t like it—it was a lot of grunt work and it was hard. However, after a while I started doing more hands-on work and learning the more intricate parts of the job. Read more

Expert tip
An Effective Tool for Clearing a Drain
HAYWARD — When one of your sink or tub drains gets clogged, you may think you need to call a plumber to get it cleared. However, with the right tool, you may be able to do this yourself. While there… Read more

Dave Lopez is owner of Advanced Roofing Services, Inc., a Diamond Certified company since 2003. He can be reached at (510) 592-4978 or by email.


Dave Lopez: Roof Dreams

By James Florence, Diamond Certified Resource Reporter

ALAMEDA — When asked why he got into the roofing trade, Dave Lopez cites both a family connection and an entrepreneurial aspiration. “My dad was a roofer, so I became familiar with the trade early on,” he recounts. “After high school, I started working in the industry and climbed up the ladder from apprentice to journeyman, foreman, and then superintendent. My goal from day one was to have my own roofing business, which I achieved in 1998. I started out with a pickup truck, working out of my home, and from there I expanded into a shop and an office. Read more

Expert tip
The Impact of Roof Pitch on Roofing Material Selection
ALAMEDA — Tar and gravel roofs have been around for a long time, but in recent years their popularity has waned. This is largely due to aesthetics, with many homeowners choosing to replace their tar and gravel roofs with composition… Read more

Hesam Rezaee is president of Molly Maid of Sonoma County, a Diamond Certified company. He can be reached at (707) 219-6365 or by email.


Hesam Rezaee: A Clean Opportunity

By James Florence, Diamond Certified Resource Reporter

PETALUMA — An avid entrepreneur, Hesam Rezaee was in between business ventures when he came upon a clean opportunity. “Previously, I ran a coffee shop and a print shop, which were located right next to each other,” he recounts. “Running two businesses simultaneously was hard, and after about two years, I was burned out. I sold one of them, closed the other and took a six-month break. During this time, I started looking for a new opportunity—something that had a good business model and family-friendly hours. When I came across a Molly Maid franchise in Sonoma County that was for sale, Read more

Expert tip
How (and When) to Clean Your Dishwasher
PETALUMA — Your dishwasher cleans your dishes, but sometimes it needs to be cleaned as well. Here are some signs that it’s time to clean your dishwasher: Reduced effectiveness in washing Calcium stains from the hard water An unpleasant odor… Read more

James Burton is general manager of Oak Plumbing Inc., a Diamond Certified company. He can be reached at (707) 652-9121 or by email.


James Burton: True Survivor

By James Florence, Diamond Certified Resource Reporter

BENICIA — Before he was general manager of Oak Plumbing Inc., James Burton handled logistics for major corporate accounts—no small responsibility, to be sure. “In my prior career, I ran massive warehouses on huge accounts for clients like Honeywell and Hewlett-Packard,” he details. “One of the biggest accounts I managed was a billion-dollar vaccine program. It wasn’t unusual for me to be managing up to 400 employees at one time.”

So, how did someone accustomed to handling such large-scale operations end up working at a small plumbing company? As James relates, it resulted from the combination of a lifelong friendship and a life-altering event. Read more

Expert tip
Thinking Proactively About Your Plumbing System
BENICIA — When it comes to maintaining your home, one of the best things you can do is think proactively. The health of your home is just like the health of your body. Most of us tend to think proactively… Read more

Eva Kissova is owner of Kiss Painting, a Diamond Certified company. She can be reached at (415) 523-0015 or by email.


Eva Kissova: Mastering a New Trade

By James Florence, Diamond Certified Resource Reporter

SAN RAFAEL — After earning not one but two master’s degrees, the last thing Eva Kissova expected was that she’d start a house painting business, but that’s exactly what happened. “I have master’s degrees in education and environmental management,” she affirms. “Unfortunately, I finished college right before the economy crashed in 2008 and spent the next two years trying to find work, to no avail. Eventually, I decided to switch gears entirely and start a business with my father, who is a professional house painter.”

While Eva lacked hands-on experience in the painting trade, Read more

Expert tip
Extending the Lifespan of Exterior Paint
SAN RAFAEL — Many homeowners think they’re getting “the most for their money” by waiting until their house paint has completely failed before repainting. However, in reality, this tactic doesn’t save money—it actually wastes it. A far more cost-effective strategy… Read more

Jeff Schroeder is general manager of American Kitchen and Bath, Inc., a Diamond Certified company since 2008. He can be reached at (408) 372-8959 or by email.


Jeff Schroeder: A Natural Transition

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — By his account, Jeff Schroeder’s entry into the home remodeling field was a purely natural transition. “My father actually started his own remodeling company back in 1980, and as a kid, I would go to jobsites with him from time to time,” he remembers. “During my senior year of high school, I started working for him on a more regular basis, which was when I really got hooked. As soon as I graduated, I started full-time in the industry and I’ve been at it ever since.”

Today, as general manager of American Kitchen and Bath, Read more

Expert tip
Waterproofing Your Home
SAN JOSE — An essential aspect of home maintenance (both inside and out) is protecting against moisture intrusion. One of the most effective measures in this regard is the application of sealant materials such as caulking. However, when performing this… Read more

Karen Skinner is senior project design specialist at Viking Pavers, a Diamond Certified company. She can be reached at 408-601-7992 or by email.


Karen Skinner: A Reinvented Career

By James Florence, Diamond Certified Resource Reporter

RICHMOND — After her longstanding career came to a sudden end, Karen Skinner took the opportunity to reinvent her professional livelihood. “I had been in the telecommunications industry for more than 30 years when I was unexpectedly laid off,” she recounts. “At that point, I took some time to decide what I would do next. I was pretty burned out on the telecom field and felt ready to reinvent myself and take on a new challenge.”

Not long after, Karen got wind of a sales position opening at a local paver company and decided to give it a shot. Read more

Expert tip
Tip for Paver Pool Decks
RICHMOND — Polymeric joint sand is used to fill the joints between individual stones in paver installations. It contains a latent plastic element that, when exposed to water, becomes activated and gives the sand an adhesive quality that locks the… Read more

Jay Furlong is CEO of Stanford Painting, Inc., a Diamond Certified company. He can be reached at (408) 622-0538 or by email.


Jay Furlong: A Fresh Coat

By James Florence, Diamond Certified Resource Reporter

MOUNTAIN VIEW — After finishing college, Jay Furlong could have pursued a career in his field of study, but instead he decided to start fresh in the painting trade. “I have a degree in mechanical engineering and product design,” he explains. “During the summers in college, I did handyman work with a friend, including some painting. After graduation, a lot of my colleagues got design jobs, but I didn’t like the idea of sitting at a cubicle or even working for a boss—I liked the freedom of doing my own thing. I looked at my options and decided to get into painting. Read more

Expert tip
House Painting: Upfront Cost vs. Long-Term Value
MOUNTAIN VIEW — When choosing a contractor to paint your house, it’s important to weigh upfront cost against long-term value. As you look at different bids, you’ll likely see a wide range of cost estimates and naturally be attracted to… Read more