Alexandria, VA permits one ADU per single-family, two-family, or townhouse property, with rules on height, footprint, and occupancy. Oakwood Construction and Remodeling, LLC helps homeowners navigate zoning requirements and build garage conversion... read more
Gold Rhino Modular Homes & Buildings offers innovative solutions, customizable designs, ready-to-ship units, and pre-configured packages for containerized modular homes, multi-unit modular structures, modular container offices, and commercial/... read more
Oztan Studio offers ADU design services in Arlington, VA. ADUs boost property value, enable rental income & multigenerational living. Arlington requires specific zoning, size & parking rules. Costs range from $100K–$300K+.
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Finecraft Contractors is a Washington D.C.-based general contracting company with 35+ years in residential renovation. Services include kitchen remodels, bathroom upgrades, room additions, and full home gut renovations, backed by transparent proje... read more
Four Brothers Design + Build specializes in Accessory Dwelling Units (ADUs) across DC, Northern Virginia & Maryland. Services include basement apartments, garage conversions, in-law suites & detached ADUs.
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DC basement ADU conversions require owner-occupancy, zoning approval, and code compliance. Costs range $100K–$250K+. Basement Remodeling handles permits, design, and construction in 2–4 months.
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Spear Builders of Virginia completed a custom garage with in-law suite (ADU) in Charlottesville, VA. Features include multi-bay garage, dormer windows, cupola, stone veneer, and a private second-floor living space compliant with local zoning.
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Doug Pruett Construction Company, Inc. is a full-service ADU contractor specializing in detached ADUs, garage conversions, backyard cottages, and in-law suites. They manage design, permitting, and construction in-house, ensuring code compliance an... read more
JBL Construct LLC builds Accessory Dwelling Units (ADUs) in Northern Virginia, handling zoning, permits, design, and construction. Services cover basement conversions, garage conversions, and detached cottages. Costs range from $275–$400+ per sq... read more
Glickman Design Build offers full-service ADU design and construction, including detached ADUs, granny flats, in-law suites & basement conversions. They handle permits, sustainable building, multigenerational layouts, remodeling, and rental in... read more
Capital Dwelling is a Washington DC-based ADU specialist helping homeowners in the DMV region plan, design, and build accessory dwelling units. Services include feasibility assessments, permitting, architectural design, and construction management... read more
Thomas Custom Builders designs & builds ADUs in Virginia, including detached units & in-law suites. Ideal for multigenerational living, rental income, or added property value. Experienced ADU contractor handling full construction, code com... read more
Annandale is a well-established, unincorporated community in Fairfax County, Virginia, known for its diverse population and a housing stock largely built from the 1950s through the 1970s. Many homes sit on generously sized lots originally platted for single-family use, which makes them strong candidates for accessory dwelling units. Experienced ADU contractors in Annandale understand how to work within the character of these older neighborhoods while updating properties to meet modern multigenerational living needs, a growing priority given the area's proximity to Washington, D.C. and the high cost of separate housing in Northern Virginia.
Because Annandale falls under Fairfax County jurisdiction, any accessory dwelling unit project must comply with the Fairfax County Zoning Ordinance, which regulates what the county refers to as accessory living units. A qualified ADU contractor in Annandale will be familiar with these county-specific requirements, which include:
Because Annandale includes a mix of zoning districts such as R-2, R-3, and R-4, lot-specific research is essential before design work begins. A contractor who regularly pulls permits in this part of Fairfax County can help homeowners determine which zoning classification applies to their property and what that means for unit size and placement.
All ADU construction in Annandale must go through the Fairfax County Department of Planning and Development, along with building permit review from the Department of Land Development Services. This typically involves submitting site plans, structural drawings, and sometimes a special permit application if the project does not meet standard accessory living unit criteria by-right. Local ADU builders in Annandale who have completed similar projects in Fairfax County can often anticipate review comments, reducing delays and helping homeowners avoid costly redesigns.
Choosing a contractor familiar with Annandale's housing patterns and Fairfax County's permitting system offers real advantages. These professionals understand how older utility connections, mature tree coverage, and established drainage patterns on many Annandale lots can affect ADU placement. They also tend to have working relationships with county inspectors and plan reviewers, which can streamline communication throughout the build.
Homeowners in Annandale pursue several ADU formats depending on lot configuration and budget:
Each option carries different implications for parking, egress, and utility connections, all of which a knowledgeable ADU contractor in Annandale will evaluate against Fairfax County code before construction begins.