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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 BLOG
Video: Site Finished Versus Pre-Finished Hardwood

Posted on September 19, 2019 by James Florence

Earlier this week, we posted an article featuring expert tips for selecting, installing and maintaining hardwood floors. One of these tips dealt with hardwood floor finishes—specifically, the way in which a natural wood floor’s finish differs from that of a prefinished wood flooring product. To learn more, watch this video by Diamond Certified Expert Contributor Reggie Keding, owner of Floor Coverings International in Concord.

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Posted in: Flooring, Diamond Certified Experts
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Diamond Certified Experts: All About Hardwood Flooring

Posted on September 17, 2019 by James Florence

There’s a reason hardwood flooring has become an industry all its own—it’s a complex and challenging trade that requires an extensive amount of expertise. Accordingly, whether you’re planning to install a new hardwood floor or just want to maintain the one you have, there are a lot of things you need to know. To give you some insight, we asked 10 Diamond Certified Expert Contributors to provide their tips about hardwood flooring selection, design, installation and maintenance. Read more

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Posted in: Flooring, Diamond Certified Experts
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The 2019 Fall Diamond Certified Directory Update is Here!

Posted on September 12, 2019 by Matt Solis

Have you received your free copy of the 2019 Fall Diamond Certified Directory Update in the mail? It provides instant access to hundreds of local, top rated Diamond Certified companies across a wide range of service industries, from auto repair and landscaping to optometry and dentistry.

Every Diamond Certified company must continue to deliver on its promises to you, the consumer. That’s why we conduct ongoing customer satisfaction research, perform credential-based ratings, monitor each company’s performance, and back you up with mediation and the Diamond Certified Performance Guarantee. Read more

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Posted in: Consumer News, Diamond Certified News
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Is it Time to Update Your Electrical Panel?

Posted on September 10, 2019 by Suzanne Carroll

Even though Bay Area residents are known for embracing the newest gadgets and technology, homes in the region tend to be on the older side—in fact, nearly half of all units in San Francisco were built before 1940. Some of these older homes still have their original wiring and electrical panels, which can be problematic or even dangerous as the electrical requirements of a household grow. Read more

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Posted in: Electrical
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LATEST PHONE SURVEY RESPONSES FROM VERIFIED CUSTOMERS
  • Bonnie H.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    You can rely on them.
    They did the work on time. They were neat, and they didn't have to come back and do any extra work. They're very knowledgeable.

    Response to Diamond Certified Company Lucas Construction

  • Emmitt M.

    Verified customer
    Quality 10
    Loyalty Yes
    Helpful expertise Yes
    Critique

    He seems to know the market really well and he gives you all the details. It's pretty painless to sell a house when he's your agent.
    He's very good at what he does. It's a good experience.

    Response to Diamond Certified Company Howard Bloom - Intero Real Estate

THIS WEEK’S FEATURED DIAMOND CERTIFIED EXPERT CONTRIBUTIONS

Mike Petrovich is owner of Absolute Best Care, a Diamond Certified company. He can be reached at (510) 854-6943 or by email.

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Mike Petrovich: Tree Service Roots

By James Florence, Diamond Certified Resource Reporter

CONCORD — When asked to recount the origin of his tree service career, Mike Petrovich says it’s rooted in family. “My dad had a tree service and landscaping business, so I grew up learning the trade from him and my uncles. After high school, I decided to continue on that professional path. I worked for a handful of companies before starting my own business, Mike’s Tree Service. In 2003, I started my current business, Absolute Best Care. In addition to my 40-plus years of experience, both of my sons have been involved with the company, so it has been neat to pass my knowledge to the next generation.”

Mike says his favorite part of tree work is helping customers in their hour of need. Read more

Expert tip
A Common Symptom of Over-Watering
CONCORD — If you notice little black dots or other instances of discoloration on your plants, you may assume they need more water, but this isn’t always the case. In fact, these symptoms are often a sign of over-watering. As… Read more

Young Moon is owner of Green Brush Painting Company, a Diamond Certified company. He can be reached at (408) 782-4993 or by email.

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Young Moon: Business-Minded

By James Florence, Diamond Certified Resource Reporter

SANTA CLARA —Just a couple of years into his painting career, Young Moon felt primed to start his own business. “Back in 2006, I had just returned from South Korea and didn’t have a career lined up,” he recounts. “My brother-in-law was a painter and he recommended I learn the trade, so I decided to give it a shot. I got a job working for his previous boss and worked for him for the next two years. While I enjoyed painting, I eventually came to realize that I preferred the business side of things to the actual hands-on work. This made me think I should start my own painting business. Read more

Expert tip
Spot Texturing With Drywall
SANTA CLARA — Preparation is a key aspect of any painting project, and interior jobs are no exception. In addition to priming and taping off seams and corners, a painter needs to repair any damage to the wall’s surface. While… Read more

Justin Donahue is lead designer of Oak Mountain Cabinets, a Diamond Certified company. He can be reached at (925) 456-4943 or by email.

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Justin Donahue: Cabinet Architect

By James Florence, Diamond Certified Resource Reporter

PLEASANT HILL — As a young man, Justin Donahue was headed toward a career in architecture, but when he applied his skills to cabinet design, he knew he’d found his calling. “My dad is a general contractor, so I grew up around construction, which naturally led to an interest in architecture,” he remembers. “After graduating from high school, I started doing architectural drawings for a living. However, since I was so young, I didn’t have very good contacts, and I routinely got stiffed on payment. Eventually, I decided I’d be better off getting a regular job, so I went to work for a local cabinet shop doing cabinet design. Read more

Expert tip
A Common Misconception About Cabinet Refacing
PLEASANT HILL — Due to its reduced cost and timeline, cabinet refacing has become an increasingly popular option for kitchen remodeling. However, some homeowners are unsure about cabinet refacing, either because they think their cabinets are unsalvageable in their current… Read more

Glayston Soares is owner of Mr. Pavers Contractor Services, Inc., a Diamond Certified company. He can be reached at (415) 523-6065 or by email.

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Glayston Soares: From Parcels to Pavers

By James Florence, Diamond Certified Resource Reporter

RODEO — After years working in the shipping industry, when Glayston Soares saw an opportunity to get into the paver business, he was confident he could deliver. “I used to be a contractor for FedEx—I had eight trucks and covered a couple of routes for them,” he recounts. “I actually got into pavers through my brother, who at the time was a paver contractor in Florida. He was having some difficulties with his business, so I told him he should move to California and start a company with me. With his industry knowledge and my administrative skills, I knew we’d make a good team. Read more

Expert tip
A Critical Aspect of Paver Installation
RODEO — With the high amount of soil movement and seismic activity that occurs in California, it’s crucial for paver features like driveways and patios to have a solid base. Proper base preparation consists of several steps, including excavation, laying… Read more

Leo Molchanov is owner of Attic Pros, Inc., a Diamond Certified company. He can be reached at (866) 221-3296 or by email.

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Leo Molchanov: A Natural Extension

By James Florence, Diamond Certified Resource Reporter

OAKLAND — When Leo Molchanov started cleaning attics and crawl spaces, it was just a natural extension of the work he was already doing. “In 2008, I came to the U.S. from Ukraine, where I’d worked as an electrician,” he recounts. “As I considered my career options, I noticed that there was a lot of demand for air duct cleaning, so I decided to start my own business. In the course of cleaning air ducts, I found that many of my customers had issues with their attics and crawl spaces. Some just needed these areas cleaned, but others had issues with rodents and energy efficiency. Read more

Expert tip
Two Ways to Keep Rodents Out of Your Attic and Crawl Space
OAKLAND — When rodents infest an attic or a crawl space, it can cause a lot of issues, from unwanted noise to unsanitary conditions. The best way to keep rodents out of these areas is to take preventative measures. Consider… Read more

Rick Stein is co-owner of Just Remnants, a Diamond Certified company. He can be reached at (415) 523-7797 or by email.

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Rick Stein: A Flooring Focus

By James Florence, Diamond Certified Resource Reporter

SAN RAFAEL — Having come from a multifaceted professional background, Rick Stein established his long-term livelihood by focusing on one particular aspect. “When I was younger, I worked for my family’s business, which handled design, supply and installation for hotel renovations,” he recounts. “I always felt drawn to the flooring aspect—I enjoyed the creativity and problem-solving it involved. Eventually, I decided to pursue a career in the flooring industry and opened Just Remnants in 1991. I was able to utilize my prior experience to get commercial contracts, but I also brought in a residential component. Today, we continue to provide for the flooring needs of residential and commercial clients alike.”

Today, Read more

Expert tip
Considerations for Hard Surface Flooring
Hard surface flooring is an increasingly popular segment of the flooring industry, with more and more homeowners choosing products like prefinished hardwood and vinyl plank. However, when considering this style of flooring, it’s important to assess specific conditions… Read more

Fred Wozniak is co-owner of Just Remnants, a Diamond Certified company. He can be reached at (415) 523-7797 or by email.

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Fred Wozniak: Return to Flooring

By James Florence, Diamond Certified Resource Reporter

SAN RAFAEL — After retiring from his job as a software specialist, Fred Wozniak decided to return to the industry where he’d originally worked as a young man. “My first job as a teenager was for a company called Tile Town in Detroit, Michigan,” he remembers. “I worked there doing installation for about six years before transitioning into the software industry, where I worked for IBM and then started my own company. I retired in the early ’90s, but I still needed something to do, so I decided to get another job. I saw an ad for a position with a flooring company called Just Remnants, Read more

Expert tip
Caring for Wool Carpet
SAN RAFAEL — Wool carpet is a popular flooring option, and it’s no surprise why—it looks absolutely beautiful when properly maintained. But what does proper maintenance involve? Here are a few guidelines: •  When vacuuming a wool carpet,… Read more

Kay Tagle is a 30-year veteran of the real estate industry and owner of Kathleen (Kay) Tagle, a Diamond Certified company. She can be reached at (925) 405-5901 or by email.

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Kay Tagle: Fully Invested

By James Florence, Diamond Certified Resource Reporter

WALNUT CREEK — Kay Tagle achieved professional success when she turned her side hustle into her full-time vocation. “I used to work for the federal government, but I also bought and sold investment properties on the side,” she recounts. “I bought my first house in Daly City, sold it and bought another in Serramonte, and I continued investing from there. At a certain point, my godmother said, ‘Why don’t you just get your license and do real estate full time?’ I decided to take her advice, and in 1990 I became a full-time Realtor. Originally, I sold properties in San Francisco, Read more

Expert tip
5 Ways to Prepare Your Home for Sale
WALNUT CREEK — Getting ready to sell your home? Consider these tips for maximizing its appeal to buyers: 1. Declutter. Every area of your home should look neat and tidy, with all surfaces clear and free of clutter. The idea… Read more

Richard Hiteshew is president of A-1 Guaranteed Heating & Air, Inc., a Diamond Certified company. He can be reached at (707) 670-3950 or by email.

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Richard Hiteshew: Family First

By James Florence, Diamond Certified Resource Reporter

VALLEJO — When asked what motivated him to start his own HVAC business, Richard Hiteshew says he just wanted to have more time with his family. “After several years working as a technician, I was fed up with my job encroaching on my family life. The final straw was when I had to work on my daughter’s fifth birthday, even though I requested the day off weeks in advance. I came home to my wife, Krissy, and told her I was going to start my own company. She said it was a great idea. Considering that we had a house payment, Read more

Expert tip
Why You Should Invest in Electric Appliances
VALLEJO — California has established a goal of relying entirely on zero-emission energy sources for electricity by the year 2045. A likely byproduct of this goal is that gas prices will skyrocket over the next 25 years. For this reason,… Read more

Mike Hernandez is operations manager of Lewis Tree Service, Inc., a Diamond Certified company. He can be reached at (831) 296-3280 or by email.

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Mike Hernandez: An Outdoor Opportunity

By James Florence, Diamond Certified Resource Reporter

SANTA CRUZ — Mike Hernandez has always loved being outdoors, so when he accepted an opportunity to give tree work a try, it was hardly going out on a limb. “One day, about a year out of high school, I ran into a family friend who worked in the tree service industry, and he asked me if I’d be interested in trying it,” he remembers. “I had worked a couple of other jobs by that point and learned that working indoors wasn’t for me, so tree service seemed like it might be a good fit. As it turns out, Read more

Expert tip
Why You Shouldn’t Over-Prune Your Trees
SANTA CRUZ — As tree service professionals, we’ll often have customers ask us to prune back their trees as much as possible. Naturally, they think this will maximize the length of time until their next pruning service. However, the reality… Read more

Kacey Copeland is owner of autoTech Blackhawk, a Diamond Certified company. He can be reached at (925) 388-6924 or by email.

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Kacey Copeland: Taking the Next Step

By James Florence, Diamond Certified Resource Reporter

DANVILLE — For Kacey Copeland, starting an auto repair business was simply the logical next step in his professional career. “After several years in the automotive industry, I was considering what my next move would be,” he remembers. “By that point, I felt like I’d become an expert in my field and was just treading water, unsure what direction I should go in. Around that time, the owner of the shop I worked at had another location come available. He didn’t think anyone wanted to buy it, so he was just going to sell the property. To me, Read more

Expert tip
Rethinking DIY A/C Maintenance
DANVILLE — If your car’s air conditioning system has stopped working, you may have considered fixing it yourself. All you need to do is add some more refrigerant, right? The truth is, A/C system maintenance is more complex than you… Read more

Ata Salem is senior technician at Ace’s Garage Door Repair & Installation, a Diamond Certified company. He can be reached at (888) 725-6139 or by email.

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Ata Salem: On Track for Success

By James Florence, Diamond Certified Resource Reporter

HAYWARD — Soon after trying his hand as a garage door technician, Ata Salem knew he was on the right track. “Before getting into garage door work, I was doing new construction work in Jerusalem,” he recounts. “Over there, all the buildings are made of concrete and steel, which are very difficult materials to work with. My brother had started a garage door service business in the U.S., so I decided to come check it out. I liked it right away—in particular, I appreciated the fact that it was a lot less physically demanding than construction. After apprenticing with my brother for five years, Read more

Expert tip
Does Your Garage Door Motor Have a Battery Backup?
HAYWARD — On July 1, 2019, California Senate Bill 969 went into effect, which requires all garage door motors sold or installed in the state to be equipped with a battery backup. A battery backup ensures that the garage door… Read more