Custom ADU Construction in Katy TX — Accessory Dwelling Units for Harris, Fort Bend, and Waller County
Katy TX’s tri-county geography creates unique ADU opportunities — particularly in western Katy where larger lots in Waller County provide the space for detached guest houses and accessory dwelling units that aren’t feasible on the smaller lots of Harris County subdivisions. MAV Design & Build builds custom ADUs across all three Katy-area county jurisdictions.
Katy’s multi-generational South Asian and Hispanic/Latino families are among the strongest ADU demand drivers in the Greater Houston market. A detached ADU provides the independence older parents need while maintaining family proximity — with a separate structure, separate entrance, and the ability to function as a fully autonomous living unit while remaining on the same property.
Garage Conversion ADUs in Katy TX
Katy’s standard 2-car and 3-car garages in Cinco Ranch and Firethorne provide ready conversion opportunities. A garage conversion ADU (Accessory Dwelling Unit) transforms an underutilized storage space into a fully conditioned, code-compliant living unit — without the expense of a new foundation or structural shell.
Our Katy garage conversions include: insulated walls and ceiling, mini-split HVAC system, full bathroom installation, kitchenette with microwave, sink, and under-counter refrigerator, new windows and exterior door, and updated electrical panel circuit for residential occupancy. Typical Katy garage conversion ADU: 400-600 sq ft, 8-12 week timeline.
Detached Guest House ADUs for Waller County and Outer Katy
Western Katy — particularly the Elyson, Sunterra, and surrounding Waller County communities — features larger lots of 8,000-15,000 sq ft that can support detached ADU guest houses of 600-1,200 sq ft. MAV builds detached ADUs on independent slab foundations with full utility connections from the main house.
Waller County ADU regulations differ from Harris County requirements. Our Katy ADU team is current on all three county codes and can advise on the most efficient ADU configuration for your specific lot and jurisdiction.
Katy ADU Construction Services
Detached ADU guest house construction | Garage conversion to living space | Above-garage ADU construction | Studio ADU builds | One-bedroom ADU with full kitchen | Multi-generational in-law suite ADU | Rental unit ADU with separate utilities | ADU with accessible bathroom design | Covered breezeway connection to main house
I'm extremely satisfied with my kitchen renovation. The entire process was handled with professionalism and precision. The crew was respectful, efficient, and always made sure I was informed every step of the way. The final result — a beautiful, well-designed kitchen with top-quality finishes and excellent craftsmanship.
Love their work, the kitchen turned out amazing and exceeded our expectations. Completed in much shorter time than I thought it would. Can't recommend them enough!!
Great experience working with this company! They remodeled my kitchen and did an amazing job. The team was professional, easy to work with, and always on time. Everything went smoothly, and they paid attention to the small details.