Fine Custom Home Building & Remodeling in Austin & Houston Texas


What Makes 512 Builders the Cornerstone of Building Integrity?

Allen Griffin has over 30 years of experience in the Custom Home Building & Remodeling Industry. As the founder of Griffin Interests, Allen owns and operates 512 Builders, Gryphon Builders, Viewpoint Designs, and Construction Claims Experts. Many of Allen's accomplishments, recognitions, and affiliations include:


-Texas Construction Defect and Claims Expert Witness.

-Over 13 Industry Awards for Custom Home Building, Remodeling and Design.

-Authored Numerous Publications in Houston Builders Magazine, Texas Builders Magazine, Houston Chronicle, Professional Remodeler  Magazine and Qualified Remodeler magazine.

-2022 Custom Builders Council President.

-GHBA Board Director.

-Allen is a Graduate Master Builder, Certified Graduate Remodeler,  Certified Aging-in-Place Specialist, and a Certified Green Professional




What's Your Home Design Style?

Need some ideas for your upcoming custom home building or remodeling project? We have put together a collection of inspiring photos to help get you to find your personal home design style!

Here It From Our Clients...

"Dedicated professional who focuses on the big picture, yet does not forget the small details"

In working with Allen Griffin, I've found a dedicated professional who focuses on the big picture yet does not forget the small details. He's been a great resource with a new development coming online as one of the designated builders. If you're looking for a dedicated professional to build your DREAM HOME and/or update your current home, Allen Griffin is the way to go!!!

"Allen is one of the most professional and pleasant design/build firms we have worked with."

Allen is one of the most professional and pleasant design/build we have worked with. After a failed contract with a previous builder (who was exclusively a builder), we were very apprehensive in selecting a new builder to work with, of which we contacted over a dozen to discuss our project.
After trying to decide whether to go the design/build route or work with an independent builder, my very first call with Allen helped us decide which direction to go in. Not only was he happy to explain things to us, but he was also extremely patient and offered honest insight into different aspects of our project. His transparency from the 20 mins when I spoke with him over the phone, is the reason I urged my husband to set an appointment with Allen.
In the end, not only is Allen one of the most creative architects who happily rendered many versions of our unique project, we felt confident in his ability to build after visiting a contemporary home he had built over a decade ago. Still solid, nicely done, and with great workmanship. As we are still in the process of completing our home, our experience with Allen thus far has been excellent. I personally cannot wait to see our home complete and look forward to the finished product!


"I would highly recommend Allen Griffin".... "work was of the highest quality"...."completed within the budget and time frame expected."

I would highly recommend Allen Griffin. Allen was extremely professional. All his work was of the highest quality. While remodeling our kitchen and living room, he devised creative solutions that made the room just how we wanted it. Allen created an incredible marble backsplash and took extra time with our countertops to create an amazing look. He also made the rest of the house livable during the project by allowing us privacy in the remaining part of the home. His team kept the space clean at the end of each day. The work was completed within the budget and time frame expected.


Allen Griffin is an incredibly talented builder who pays amazing attention to detail and precision.

I've worked with Allen on several projects and have always been impressed with his construction knowledge, the skill of his subcontractors, and the way he runs and personally supervises his job sites. Remodeling is vastly different from new construction- you're working in people's homes, and it’s very invasive. The care Allen takes to keep his job sites tidy, the timeline honest and the expectations well-set make working with him a joy. He is also very forthright and honest and relates well to owners.

Many times- as a designer-I come up with an idea that’s never been done before-some. Contactors shy away from that because it’s not easy or it’s not how they like to work. Allen is always up for the challenge. – He is an ‘out of the box builder whose skill set and construction knowledge is priceless in making my design ideas and ‘possibilities’ come to life. I could not do it without him and consider him a partner in the design-build process. It’s thrilling to co-creating something that is EXACTLY right for the client, the space, and the intended use. Allen’s easygoing nature, optimism, and excellent construction skills make him fun to work with! I would highly recommend Allen for any residential or light commercial project.

-Cindy Alpanalp- Chairma Design Group

Question About your Home Building Or Remodeling Project?

Our Services include:

Complete Luxury Custom Home Building and Design
Full Home Remodeling
Kitchen Remodeling
Bathroom Remodeling
Design Services with 3D rendering software
Fast Free Consultations
For information on anything Home Building, Remodeling, or Design? With over 30 years of experience in-house..., We can help!

Austin Location

701 Marburger Street

Smithville, TX 78957

Houston Location

10615 Shadow Wood Dr.

Houston, TX 77043

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Austin, Texas- Custom Home Building and Remodeling Experts!
Serving Texas neighborhoods for over 20 years!


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