Diamond Certified® Garage Door Companies in the Bay Area

Rated Highest Quality in Customer Satisfaction

Diamond Certified® garage door companies have received high ratings for quality in customer satisfaction. Selecting such a company to install or repair your garage door guarantees problem-free service.

What is a Diamond Certification®?

It is a rigorous 12-step certification by the American Ratings Corporation. A survey is conducted (by telephone) of a random sample of at least 400 past customers from a garage door company's database. They must score 90+ on a 100 scale in customer satisfaction and pass all credential-based ratings to become Diamond Certified®.

What are some important criteria a garage door company must fulfill to acquire the Diamond Certification®?

  • Credentials check - the company must have required insurances and valid State-mandated credentials
  • Fair practices - must perform to contract, have customer-friendly business practices and stand behind its work
  • Commitment – must adhere to the Diamond Certified® Customer Satisfaction Principles.
  • Regular monitoring – is subjected to ongoing surveys to ensure the company is maintaining high customer satisfaction and loyalty
  • Quality assurance – a Diamond Certified® Performance Guarantee provides added assurance of the company's commitment to customer satisfaction.

Madden Door & Sons is one of the few Diamond Certified® garage door companies in the Bay Area.

Contact Madden Door online or call us at 925-357-9781 for guaranteed quality service from a Diamond Certified® garage door company in the Bay Area.

Diamond Certified® Garage Door Company for Premium Home Service

Need a custom garage door for your new home? Or looking for a high quality standard model? Madden Door & Sons offers a wide range of choices to suit your style and budget.

Absolute customer satisfaction has always been our top priority. Whether it's unique door styles, ongoing repair or selecting the right garage door opener, you'll always get highly personalized, first-class service. For the past 35 years we've built a reputation for cost-effective garage door solutions tailored to your needs.

Being Diamond Certified® is no small achievement. Honesty and exceptional service are the hallmarks of our family-run business.

  • We treat each customer as if they were the only one.
  • Every job gets done on time and within budget; you never have to worry about hidden charges
  • We employ the Diamond Certified® performance guarantee and customer satisfaction principles as a means to enhance the quality of our already top notch service

Contact us for quality service from a Diamond Certified® garage door company in the San Francisco Bay Area.

Call Now: 925-208-4907