A modern prefab backyard ADU featuring vertical natural cedar wood siding, matte charcoal standing seam metal cladding, corner picture windows, and a landscaped patio with outdoor seating

    Exterior Siding & Cladding Options for ADUs

    Exterior siding and cladding are the weather-facing skin of an accessory dwelling unit, and they decide

    An open-concept ADU interior featuring a modern walnut kitchen with a waterfall quartz island, adjacent living room with neutral boucle seating, and a vaulted ceiling with an exposed wood beam

    Interior Finish Materials & Design for ADUs

    Interior finishes are the visible, touchable layer of an accessory dwelling unit: the flooring, wall treatments,

    A light-filled modern ADU bedroom featuring a built-in oak storage bed with pull-out drawers, an integrated reading bench, floor-to-ceiling cabinetry, and a large black-framed garden window

    Space-Saving Storage Solutions for ADUs

    Space-saving storage solutions for ADUs are the built-in, vertical, and multifunctional systems that create usable storage

    A modern studio apartment interior featuring an elevated wooden platform bed nook with integrated shelving and a window next to an open living area with a gray sofa and mid-century coffee table

    Bedroom & Living Space Design for ADUs

    Bedroom and living space design for ADUs is the practice of planning habitable rooms inside an

    A contemporary bathroom featuring a curbless walk-in glass shower with matte black fixtures, gray large-format porcelain tile, a floating oak wood vanity, and a round black-framed mirror

    ADU Bathroom Design Guide

    An ADU bathroom is the full wet-room system inside an accessory dwelling unit, combining plumbing, ventilation,

    A modern Scandinavian-style kitchen with natural oak flat-panel cabinetry, white quartz countertops, stainless steel appliances, and fresh rosemary with a bowl of lemons on an island cutting board beside a sunny window

    ADU Kitchen Design & Layout Guide

    An ADU kitchen is a complete cooking space inside an accessory dwelling unit that includes a

    Copper water service lines and black flexible corrugated conduit laid along an excavated dirt trench beside a poured concrete building foundation wall

    Utility Connection & Sewer/Septic Design for ADUs

    Utility connection and sewer/septic design is the engineering work that ties an accessory dwelling unit into

    A white wall-mounted ductless mini-split air conditioner mounted above a cozy reading nook with a gray armchair, knit blanket, potted fiddle-leaf fig, and large picture window in a bright modern home

    HVAC & Heating Solutions for ADUs

    HVAC and heating solutions for ADUs are the mechanical systems that heat, cool, and ventilate an

    A detached ADU electrical blueprint laid out on a workshop bench with a digital multimeter, heavy-gauge electrical wiring, circuit breakers, and copper grounding wire overlooking a modern backyard ADU

    Electrical System Design for ADUs

    Electrical system design for ADUs is the engineering and planning process that determines how a second

    Copper and brass plumbing pipe fittings arranged over an ADU plumbing blueprint with a black drafting pencil on a wooden desk

    Plumbing System Design for ADUs

    Plumbing system design for ADUs is the engineered plan that routes water supply, drainage, waste, and