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  • Accurate Ratings

    Local companies rated
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  • Deep Info™

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

LOCAL CONSUMERS AND COMPANIES RELY ON THE DIAMOND CERTIFIED RESOURCE

Barbara Schallau Consumer
Bay Area

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

Jagdish Hegde Consumer
Fremont

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

BROWSE BY MAJOR CATEGORIES
WHY CHOOSE A DIAMOND CERTIFIED COMPANY?
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.
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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 diamondcertified.org, 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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WHAT’S IN EACH DIAMOND CERTIFIED COMPANY REPORT?
SAMPLE COMPANY REPORT

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

  • ACCURATE RATINGS

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

    VERBATIM SURVEY RESPONSES

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

    VIDEO PROFILE

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

    ESSENTIAL ARTICLES

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

    CAPABILITIES TABLE

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

    TOPIC-BASED EXPERT CONTRIBUTIONS

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

    PHOTO GALLERY

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

    COMPANY WEBSITE & EXTERNAL FEED

    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...

DIAMOND CERTIFIED CONSUMER INFORMATION AND RESOURCES
Diamond Certified Experts: Three Steps to Save Water in Your Yard

Posted on May 15, 2018 by James Florence

While drought conditions have subsided in the Bay Area, water conservation remains as important as ever. After all, there’s no telling what the future holds, and if the past has taught us anything, it’s that we can’t afford to take our most precious resource for granted. So, if you haven’t already taken steps to reduce your water consumption, now is the time.

According to sources, more than half of the total water usage in California households goes to yard and lawn irrigation. With this in mind, if you want to maximize the impact of your water-saving strategy, the first place you should look is outside your home. There are many ways to save water in your yard, Read more

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Posted in: Water Conservation, Diamond Certified Experts, Landscaping Tips
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Industry Spotlight: California Public Utilities Commission (CPUC)

Posted on May 10, 2018 by Suzanne Carroll

When you think about public utilities, you probably think about electricity, water or gas. The California Public Utilities Commission (CPUC) is a government agency that regulates private companies that provide those services. But the mandate for the CPUC is much broader than many Californians realize—it also has authority over telecommunication companies, rail transit providers and passenger carriers. The CPUC’s stated mission is to “regulate services and utilities, protect consumers, safeguard the environment, and assure Californians’ access to safe and reliable utility infrastructure and services.” This piece focuses on one aspect of the CPUC’s role: the regulation of moving companies.

Any company that moves household goods within California needs to have a permit issued by the CPUC. Read more

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Posted in: Industry Organization Spotlight
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5 Things to Ask a Realtor: Buyers’ Edition

Posted on May 08, 2018 by James Florence

If you’re in the market for a new home, one of the first things you’ll need to do is find a Realtor. However, with an abundance of working professionals in the real estate field, you’ll need to be proactive about finding one who’s qualified and dependable. Besides verifying licensing and getting references, one way to evaluate a Realtor is to ask plenty of questions. Here are five things to ask a Realtor: Read more

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Posted in: 5 Things to Ask, Real Estate Tips
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LATEST PHONE SURVEY RESPONSES FROM VERIFIED CUSTOMERS
  • H. C.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    They do a good job. I don't know all the fine details, I'm just an admin here but, they were good.
    They fixed the problem from what I know.

    Response to Diamond Certified Company McLean & Williams, Inc.

  • Evan M.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    They have great customer service, and they are very detailed. Jesse did a very good job, and he explained everything he was doing.
    They got rid of the cockroaches from my house completely.

    Response to Diamond Certified Company All N One Pest Eliminators

THIS WEEK’S FEATURED DIAMOND CERTIFIED EXPERT CONTRIBUTIONS

Tatiana Acevedo is an account manager at No More Dirt, Inc., a Diamond Certified company. She can be reached at (415) 484-5907 or by email.

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Tatiana Acevedo: A Clean Transition

By James Florence, Diamond Certified Resource Reporter

SAN FRANCISCO — Tatiana Acevedo already had plenty of management experience when she came to California from her home country of Puerto Rico, so when she landed a management job with a janitorial service, it was a clean transition. “Prior to moving to California, I worked for a paint and construction product manufacturing company, where I managed accounts with major retailers like Home Depot and Walmart,” she explains. “A few years ago, my husband got a job offer in California, so we uprooted from our home in Puerto Rico and came to the Bay Area. After transitioning to my new life, Read more

Expert tip
Janitorial Tips for Tenancy Transitions
SAN FRANCISCO — Running an HOA or a common workspace can be challenging, especially when it comes to tenant turnover. After all, there are many details to address in the interim between tenancies, and how you handle this transition can… Read more

Dain Vogel is an account manager at No More Dirt, Inc., a Diamond Certified company. He can be reached at (415) 484-5907 or by email.

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Dain Vogel: A Clean Opportunity

By James Florence, Diamond Certified Resource Reporter

SAN FRANCISCO — Any employee likes having a good boss, but Dain Vogel really lucked out when he got a chance to work for his longtime mentor. “After six years working as an elementary school teacher, I was looking for a career change,” he recounts. “About that time, I came upon a job opportunity with No More Dirt. I’ve known the owner, Nick Mettler, for a long time. Nick has always been a bit of a mentor to me—I’ve often gone to him for advice and he has helped guide me along my path. So, naturally, when I got a chance to work for him, Read more

Expert tip
The Importance of Dispenser Keys in Commercial Spaces
SAN FRANCISCO — If you’re a business owner moving into a new commercial space, the first thing you’ll likely ask for is a key to the front door. However, there’s another type of key that’s important in commercial properties yet… Read more

Ryan Cordes is manager of European Sales & Service, a Diamond Certified company. He can be reached at (707) 836-3960 or by email.

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Ryan Cordes: Earning His Birthright

By James Florence, Diamond Certified Resource Reporter

SANTA ROSA — When Ryan Cordes started working at his father’s auto repair shop, he wasn’t given any special privileges—he had to work his way up from the bottom like everyone else. “I began working for my dad in 2000, right after graduating from high school,” he recounts. “I started out mopping floors, moved up to washing cars, spent some time in the parts department and was eventually promoted to shop manager in 2011. All along the way, I entertained different ideas for what career I wanted to go into, but ultimately I decided to stay put. I enjoy working on cars and interacting with customers, Read more

Expert tip
Caution for Buying a Used Mercedes-Benz
SANTA ROSA — If you’re interested in buying a used Mercedes-Benz, there’s something you should be aware of. Certain models from 2004 to 2008 are known to have a problem with their timing chains, caused by a defective balance shaft.… Read more

Ralph Wedge is owner of Wedge Roofing, a Diamond Certified company. He can be reached at (888) 763-7663 or by email.

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Ralph Wedge: Roofing Opportunity

By James Florence, Diamond Certified Resource Reporter

PETALUMA — In the wake of an economic recession, Ralph Wedge found an opportunity to start his own business. “Early in my career, I worked for a roofing company doing carpentry work like dry rot repair and upper roof reconstruction,” he recounts. “When the recession of 1974-75 hit, that company went bankrupt and closed its doors, as did several other roofing companies in the area. I saw this as an opportunity to get into the business, so I applied for and received my roofing contractor’s license. That marked the beginning of Wedge Roofing in 1976. I started out small with just a few employees, Read more

Expert tip
Understanding Your Roofing System Warranty
PETALUMA — A good way to make the most of a new roof is to install it as a “roofing system.” With a roofing system, all components are installed in accordance with the manufacturer’s set guidelines. The main benefit of… Read more

Bob Easley is owner of California Fencing, a Diamond Certified company since 2013. He can be reached at (415) 689-6024 or by email.

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Bob Easley: Building Trust

By James Florence, Diamond Certified Resource Reporter

SAN RAFAEL — When asked to reflect on his career as a fence builder, Bob Easley spares the glitz and glitter. Chalk it up to modesty, but after four decades of satisfying customers, he has a lot to be proud of. “In 1974, I was 18 and needed a job, so I became an apprentice with a fence builder,” he recounts. “After a couple of years, I figured I could do it on my own, so I went into business for myself. Forty years later, here I am—call it a life sentence. Building fences is hard work, but the longer you do it, Read more

Expert tip
Do You Really Need to Stain Your Redwood Fence?
SAN RAFAEL — Many homeowners stain their redwood fences because they think it will preserve the wood and extend the fence’s lifespan, but this is a misconception. The reality is stain has a purely aesthetic function that doesn’t affect the… Read more

Kenny Johnson is Vice President of Production at Delta Pacific Builders Inc, a Diamond Certified company since 2014. He can be reached at (925) 201-6391 or by email.

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Kenny Johnson: Going Out West

By James Florence, Diamond Certified Resource Reporter

BETHEL ISLAND — After 25 years in the construction trades, Kenny Johnson had pretty much done it all, so when he got a chance to build patio covers in California, he decided to give it a try. “I’m originally from Pennsylvania,” he clarifies. “I started out in commercial roofing, later got into home renovations and eventually started my own remodeling business. A few years ago, I came to Northern California to help my father-in-law finish a building project. That blossomed into a full-time opportunity with his business, so I decided to permanently relocate to the West Coast.”

Today, Read more

Expert tip
Considerations for a Patio Cover
BETHEL ISLAND — A patio cover presents a simple, affordable way to bridge the gap between your indoor and outdoor living spaces. While a patio cover isn’t a complex installation, there are a few important things to consider before purchasing… Read more

Jorge Neukirchen is vice president of Viking Pavers, a Diamond Certified company. He can be reached at (877) 296-0817 or by email.

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Jorge Neukirchen: Interlocking Success

By James Florence, Diamond Certified Resource Reporter

RICHMOND — Some people find professional success independently, but for Jorge Neukirchen, it resulted when he and his best friend interlocked their respective skills. “Prior to getting into the paver business, I was a mortgage broker,” he recounts. “My best friend, Mauro, had been in the interlocking paver industry for about five years, and he asked if I wanted to partner with him to start a business. With his hands-on knowledge of pavers and my business expertise, I knew it would be a winning combination, so I came aboard and never looked back.”

Today, as vice president of Viking Pavers, Read more

Expert tip
Why Interlocking Pavers are a Smart Choice in the Bay Area
RICHMOND — Here in the Bay Area, we have a lot of soil movement. One reason for this is the high amounts of clay found in much of the native soil. Since clay is prone to absorb and retain water,… Read more

Nick Granato is owner of PremierGarage, a Diamond Certified company. He can be reached at (877) 735-8517 or by email.

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Nick Granato: In the Garage

By James Florence, Diamond Certified Resource Reporter

FOSTER CITY — When Nick Granato set out to find a new business opportunity, the last place he expected to end up was in the garage. “I’m a former Chief Operations Officer for COIT, a company that specializes in carpet and upholstery cleaning,” he recaps. “While working there, I became friends with Benny and John, who also worked for the company. Over time, we grew tired of working for a big corporation and wanted to do our own thing, so we began looking for opportunities in the home services industry. Along the way, we discovered PremierGarage and were impressed with their products, Read more

Expert tip
Tips for Installing Garage Storage Cabinets
FOSTER CITY — When it comes to installing storage cabinets in a garage, proper planning is crucial to ensure an optimal final result. Here are a few installation tips to consider: Anticipate usage. Before installing your new cabinets,… Read more

Leo Diaz is president of Diaz and Sons Construction, a Diamond Certified company. He can be reached at (707) 985-8990 or by email.

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Leo Diaz: A Family Operation

By James Florence, Diamond Certified Resource Reporter

SANTA ROSA — Leo Diaz found success as a contractor thanks to both a family background and an entrepreneurial streak. “Growing up, I had several family members in the trades, including my father who was an electrician,” he recounts. “I’ve basically been working my whole life. Even as a kid, I was doing lawn maintenance and other jobs for my ‘clients’ around the neighborhood.”

Following high school, Leo enlisted in the U.S. military, where he took part in Operation Desert Storm during his three tours of duty. After finishing his service, he relocated from his home state of Maryland to California to be with his wife, Read more

Expert tip
Inspecting Your Home Exterior
SANTA ROSA — As a homeowner, it’s important to periodically inspect your home exterior. A good way to do this is to walk around your home and look closely for any potential issues. By doing this a couple of times… Read more

Bill Place is owner of Nor Cal Glass Products, Inc., a Diamond Certified company. He can be reached at (707) 206-9660 or by email.

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Bill Place: A Clear Trajectory

By James Florence, Diamond Certified Resource Reporter

ROHNERT PARK — Bill Place’s professional path may have started vaguely, but it became as clear as day after he entered the glass industry. “Out of high school, I got a job washing cars at Hansel Ford in Santa Rosa,” he remembers. “I was looking for something with more of a future, so I asked the auto glass guy if he needed any help. He didn’t, but he referred me to a friend in the residential glass business, which led to me getting a job.” Later, Bill joined the union and got into the commercial side of the glass business, Read more

Expert tip
How to Maintain Your Shower Glass
ROHNERT PARK — Many homeowners want to know what they can do to keep their shower glass clean and maintained. This comes down to two main aspects: everyday practices and routine cleaning. As for everyday practices, there are a couple… Read more

Bill Shepherd is president of Shepherd’s Plumbing Heating & AC, Inc., a Diamond Certified company. He can be reached at (650) 409-1467 or by email.

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Bill Shepherd: A Plumbing Affinity

By James Florence, Diamond Certified Resource Reporter

SAN JOSE — A third-generation plumber, Bill Shepherd was introduced to the trade at an early age and never looked back. “My family has been doing plumbing since the 1930s, starting with my grandpa,” he recounts. “I did my first job when I was six years old, when I helped my dad install a toilet at a neighbor’s house. From that point on, I basically fell in love with plumbing. I really enjoyed working with my hands and just had a natural ability for it.” During his teen years, Bill regularly worked for his father on afternoons, weekends and during summers before coming on full-time after high school. Read more

Expert tip
How to Prevent Toilet Problems
SAN JOSE — Even if your toilets work fine 95 percent of the time, problems are bound to arise once in a while. Whether your toilet is running non-stop or clogged and about to overflow, knowing what to do can… Read more

Steve Villa is president of Rafael Floors, Abbey Carpet Center, a Diamond Certified company. He can be reached at (415) 669-4944 or by email.

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Steve Villa: An Unlikely Ascent

By James Florence, Diamond Certified Resource Reporter

SAN RAFAEL — Few people go from sweeping floors to managing operations at the same company, but Steve Villa did that and then some. “I started at Rafael Floors back in high school,” he remembers. “Ron Leach, the original owner, was my next-door neighbor, and he offered me a job in his warehouse. I would come in every day after school and sweep the floors, run errands, and make deliveries. From there, I became an apprentice installer and continued to work part-time through college. After graduating with a degree in business administration, I returned full-time as an administrative assistant. Read more

Expert tip
Wood and Faux Wood Flooring Options
SAN RAFAEL — If you’re thinking about installing a wood or faux wood floor in your home, you’ll want to know the full spectrum of your options. Here’s a summary of these options and their benefits: Authentic wood flooring The… Read more