Prefab ADU Think Tank Built in Savannah

This is a prefab design by Phoenix-based ASUL — which stands for adaptable system for universal living — and CSCP Consult in Savannah, Georgia. The tiny accessory dwelling unit has a 16′ x 20′ interior and is used by CSCP Consult as a “Think Tank,” or office, library, and study. The ADU, as shown below, is adjacent to a restored mid-century modern home and rests on 6-foot stilts to comply with FEMA flood zone requirements.

Think Tank was finished in a “both build” scenario whereby ASUL fabricated and erected the steel frame, walls, and roof, and CSCP Consult, with its design director Celestino Piralla and general contractor Capers Martin, buttoned it up. The on-site build took about three weeks.

The interior has FLOR floor tiles with about 44% overall recycled content, CB2 desks and storage, ISS industrial grade shelving, and eBay finds for the chairs, tulip table, and hanging lamp.

The construction includes a light-gauge steel frame, R38-batt insulation in the wall, floor, and ceiling cavities, plywood and fiberboard sheathing covered with a vapor barrier, argon-filled double-pane windows, interior solar shades with 5% light penetration, recessed LED lighting, and a galvalume skin.

ASUL has updated its pricing since the completion of this project, but the total project cost was about $59,000, which includes permits and about $10,000 attributable to meeting the FEMA requirements with stairs and the stilt foundation.

[+] More info on this ASUL ADU in Savannah, Georgia.

Photo credits: Celestino Piralla- CSCP CONSULT LLC. 

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  • Michelle

    Handsome design. Now we just need the City of Portland to omit their antiquated restrictions on the aesthetics of ADUs (exterior needs to match the ‘primary dwelling’).

  • Gabriel Cross

    Very nice as an office, but I couldn’t see any plumbing in that photo.  To be an ADU it would have to have a kitchen and a bath, no?  The word “dwelling” does imply that someone could actually live there.  It seems to me that would unnaturally deflate the price as well, if you had to bring on a plumber and buy all the fixtures and appliance, that price tag would have gone up a touch, I imagine.

    • Preston

      To be fair, perhaps we took a little license with the terminology.  We hope to share future projects from ASUL with kitchen and bath.  They’re doing some great work.  

    • Cornelia

      Hi Gabriel,
      we opted out of plumbing , due to the price factor ( FEMA requirement to add plumbing) as this is only for libray, study use and was always planned that way. Normally the plumbing is a set feature with ASUL.
      As said we just did not need it for our purpuse.

      • Gabriel Cross


        I didn’t mean anything against your project, the design is beautiful.  I only took issue with calling it an ADU.  I love urban infill, and will follow any link about design for ADUs, multi-family, small homes, etc.  Just wasn’t what I was expecting.

  • Glenn Callahan

    How is the septic discharged?

    • Bruce A Johnson

      The structure is a home office/library; there is no plumbing.

  • Hateorlove6666

    very cool design you have there. I like the paint and the interiors are so neat.

    • Cornelia

      Thanks for the compliment… as the space is ” prime” we did opt not to overlaod it and use it to the optimum.The furnishings prove that libraries/ offices do not have to be with big desks…

  • Edwin Flores

    Nice Article

  • Erwinecsomart

    $185 dollars per square foot without sanitary and some features ? Crappy pricing. Post a project when it’s got some value….Go the the Home Depot and you can build it for less…

    • Design

      good luck at home depot for the design and quality of the project. my experience is to invest in quality works really over the long run. but everybody needs to decide this for their own. you need to take in consideration that the project needed to be raised 6ft as well as it sits in a FEMA floodzone and a hurricane zone, some of the common material do not work!

  • web design california

    This is very well designed. This looks very cool and will be very good to stay in that place. I liked it.

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