Expert ADU Construction in Alexandria & NOVA
DETACHED ADUs | ATTACHED ADUs | GARAGE CONVERSIONS | BASEMENT ADUs
From designing freestanding backyard cottages in historic Old Town to building modern above-garage carriage houses in Del Ray, we design and build Accessory Dwelling Units (ADUs) tailored to your lot and lifestyle. We handle everything from zoning approvals and utility trenching to premium finishes—delivering your legal secondary suite on-time, on-budget, and with zero stress.
Many properties in Alexandria and Northern Virginia have untapped potential in their backyards. Slide to see how we transformed an empty space into a premium 2-car garage featuring a fully autonomous above-garage ADU. We engineered a private side-stair entrance to ensure complete privacy, creating the perfect carriage house for rental income or multi-generational living, all without sacrificing your valuable parking space.
Your property has the exact same potential!
Whether
you want to build a ground-up carriage house, a detached backyard
cottage, or convert your existing basement, our turnkey design-build
process makes local zoning, utility trenching, and construction
completely seamless and stress-free.
As a premier whole home remodeler in Alexandria, VA, we offer a full suite of ADU construction services tailored to the unique zoning laws and architectural character of NOVA properties. From navigating setbacks to executing ground-up builds and complex conversions, our Class A team handles every single detail under one roof.
Detached ADU Construction
Build a freestanding, ground-up secondary home in your backyard. Our custom detached ADUs feature fully independent utility hookups, private sewer/water lines, full kitchens, modern bathrooms, and dedicated HVAC systems. We handle everything from Alexandria zoning setback verification and foundation engineering to complete turnkey design-build construction.
Attached ADU Additions
Expand your primary residence with a seamlessly integrated, code-compliant attached ADU. Perfect for properties with tighter lot boundaries, attached accessory dwelling units share a structural wall while offering private exterior entrances, soundproofed shared barriers, separate living zones, and full amenities without sacrificing your yard’s usable space.
Garage to ADU Conversions
Transform an underutilized detached or attached garage into a high-end living unit. We evaluate your existing slab foundation, reinforce structural framing, upgrade thermal insulation, install sub-panels, and handle plumbing rough-ins. We also build second-story carriage house apartments over active garages to double your functional square footage.
Above-Garage ADUs Building
Maximize your property’s vertical space without eating into valuable yard area or sacrificing vehicle parking. We design and build detached and attached carriage houses directly over new or existing garages. Our turnkey process includes structural load-bearing reinforcement, fire-separation assemblies between the garage and living quarters, dedicated exterior access stairways, independent mini-split HVAC zoning, and complete kitchen and bath installations.
Basement to ADU Conversions
Basement to ADU Conversions (Legal Apartments). Convert your full or walkout basement into a fully permitted, legal internal ADU. Our team specializes in cut-in egress window installations, exterior walkout excavation, 1-hour fire-rated drywall ceilings, acoustic soundproofing, and complete kitchen and bath additions compliant with local Northern Virginia building codes.
Second Story ADUs & Addition
Expand upward by adding a fully autonomous secondary dwelling unit onto your single-story home or converting an underutilized upper level/attic. We manage complete vertical load engineering, roof framing modifications, private exterior stair tower construction, floor joist acoustic soundproofing, dedicated sub-panels, and code-mandated emergency egress installations compliant with Alexandria residential codes.
Whether you are caring for family, generating passive income, or creating a quiet workspace, our ADUs adapt to your lifestyle.
From upgrading classic family homes in Rosemont and North Ridge to executing modern ADU builds in the West End, we combine master-level craftsmanship with deep knowledge of local zoning codes, utility connections, and permit requirements. Our team ensures every ADU transformation is fully compliant, flawlessly executed, and built for lasting durability.
At NextDay Remodeling, we bridge the gap between your vision and a finished secondary home through our seamless design-build approach. As a premier ADU construction general contractor in Alexandria and NOVA, we take the stress out of complex backyard cottages, basement apartments, and carriage houses. Our team manages every detail of your project including lot surveys, zoning and setback verification, utility trenching, required permit acquisition, and final construction. We solve the common headaches of ADU building by delivering predictable timelines, transparent communication, and craftsmanship that stands the test of time.
Explore our gallery of recently completed Accessory Dwelling Units, custom home additions, and premium remodeling projects across Alexandria and Northern Virginia. These showcases demonstrate our versatile design-build expertise, space optimization capabilities, and sharp attention to detail—from navigating complex zoning challenges and high-end ground-up builds, to stunning kitchen, bathroom, and full-home transformations.
Alexandria, VA.
We provide expert ADU construction and design-build services throughout all of Alexandria, including Old Town, Del Ray, Rosemont, North Ridge, West End, Kingstowne, Potomac Yard, and surrounding neighborhoods.
Surrounding Northern Virginia
Our team also delivers premier accessory dwelling unit services in:
For a comprehensive list of the cities and neighborhoods we serve, please visit our Service Area page.
Every home in Alexandria and Northern Virginia has its own unique character, and we’re here to provide the clarity you need. Reach out today for a professional consultation and expert advice tailored to your vision.