That ADU Guy, LLC – Answering your questions on how to plan, design, finance & build affordable Accessory Dwelling Units.

CUSTOM ADU PLANS

Our team provides custom, permit-ready ADU house plans designed to meet your local standards.
■ Initial drafts provided within 10 business days.
■ Best pricing in the market with a focus on affordable design.
■ No risk — Pay only after your plans are approved.
We look forward to helping you achieve your affordable ADU design goals.

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OPEN SOURCE VIDEO SERIES

Ready to build ? Derek’s comprehensive, open-source video series guides you through every step of the process—from selecting the right property to designing and financing a space-efficient home. Whether you're looking to build a rental unit, a guest house, or a personal retreat, this series is designed to help you turn your ADU vision into a reality—affordably, sustainably, and with confidence. Get started today!

CHECK OUT DEREK'S VIDEOS

CONSULTING

Offering personalized guidance on how to create passive income while avoiding costly pitfalls inherent in a process fraught with red tape and technical challenges. Derek's consultations earn rave reviews (see below). With 28 years of experience and loads of enthusiasm to share, you'll get practical tips on each facet of the process.

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Scott Janczyk

22:09 17 Jan 23

I had the pleasure of having an hour call with Derek about my potential investment strategy involving adding ADUs. He gave me very targeted advice based on my specific goals, financial situation, local resources to the areas I am looking to invest in and ADU specific tricks of the trade that I had not heard before which have helped evolve my investment strategy. I would highly recommend speaking with him to help with your ADU questions.

David Goforth

01:01 05 Jan 23

I had a phone consultation with Derek and he was incredibly knowledgeable, insightful, and helpful. He is a great communicator and gave me great advice on a project I am looking to take on. He provided me with several actionable steps to get things started and ensure that adding a unit would be possible. I highly recommend Derek, aka That ADU Guy, for anyone with questions about the process of adding a dwelling unit and how to be successful in doing so!

Damian Holz

01:18 21 Aug 22

I reached out to Derek to ask his expert advice relating to ADUs - not only did Derek call me back on a Saturday night, but he spent a lot of time explaining various elements of ADUs to me - linking me up with information, resources and a pathway forward to progress my idea. He is SUPER knowledgable on ADUs and passionate about affordability, amazingly generous with his time & clear in his communication. He is making a real, tangible difference in solving some of the biggest housing challenges in the world - not just in the US but internationally - his advice will help with solving key housing problems in Australia (where I am from) too. Thank you so much Derek!

Nathaniel Epps

16:21 10 Aug 22

Derek is a wealth of knowledge, and it was great speaking to you. As a first-time home buyer, it's almost unheard of for a Pro in the game to give you their time for free. I highly recommend setting up a call with Derek, whether you are a new home buyer or a seasoned investor. Derek "That ADU Guy" can help!

John Kennedy

21:00 02 Aug 22

After hearing an interview with him on Biggerpockets, I set up a phone consultation with Derek through his website. Talking with him was awesome. I'm a first time homebuyer looking to deploy the ADU strategy in a very competitive market, and he helped me work through some of the challenges I've been facing. He even followed up afterwards by sending a link to a relevant Youtube video. I highly recommend talking to Derek if you're thinking of setting up an ADU!

CUSTOM ADU PLANS

OPEN SOURCE VIDEO SERIES

CONSULTING

RECENT ADU PROJECTS

RECENT ADU PROJECTS

RECENT ADU PROJECTS

RECENT ADU PROJECTS

RECENT ADU PROJECTS

Recent ADU Projects

Recent ADU Projects

RECENT ADU PROJECTS

Recent ADU Projects

Recent ADU Projects