Makara Builders is Washington DC's leading ADU contractor, specializing in detached ADUs, garage conversions, and granny flats across DC, Maryland, and Virginia. Build in 120 days from permit approval and start earning rental income fast.
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Hammer Contractors builds ADUs in Washington DC, including detached units, garage conversions, and basement apartments. They handle zoning compliance, permits, and full construction, helping homeowners add rental income or family living space.
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Elite Contractor Services in Annandale, VA builds Accessory Dwelling Units, home additions, basement finishing, kitchen remodeling, and bathroom renovations, helping homeowners create functional in-law suites, rental units, or extra living space t... read more
Excell Homes is a Northern Virginia ADU builder with 20+ years experience. They offer turnkey accessory dwelling units in Fairfax, Arlington & Alexandria, covering design, permitting & construction under one fixed-price contract.
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Moore Construction Group designs and builds custom home additions in Alexandria, VA and Northern Virginia, including basement ADU conversions, rear additions, master suites, and sunrooms, adding space and value without moving.
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FineCraft Contractors, Inc. is a general contracting firm with nearly 40 years of experience in home renovations, kitchen remodels, room additions, and more. Known for quality craftsmanship, transparent communication, and on-budget delivery.
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UP Craftsmen is a licensed ADU builder in Montgomery County, MD, specializing in accessory dwelling units, home additions, and remodeling. They offer Home, Professional, and Studio Series ADUs, plus full construction services. MHIC License #015138... read more
Montgomery County ADUs: ZTA 19-01 expanded accessory dwelling unit rules, removing bans on detached ADUs on small lots, lifting distance restrictions, easing parking near transit, and allowing garage conversions. Short-term rentals on ADU properti... read more
BBCDC Construction & General Contractors specializes in ADU development in Washington, DC, managing zoning compliance, permits, and construction for detached, semi-detached, and attached accessory dwelling units across all residential zones.read more
Halsey Homes builds custom ADUs in Fredericksburg, VA—detached units, in-law suites, granny flats & garage conversions. With 25+ years of experience, voted Best Builder 2025. Expert ADU contractor handling design through completion.
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Carbide Construction offers modular additions, ADUs, in-law suites, and ADA-compliant builds in Northern Virginia. Since 2002, they manage design to installation, working with top manufacturers for custom, eco-friendly prefab home solutions.
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Back Creek Builders constructs ADUs and in-law suites in Maryland, handling design, permitting, and build. Project types include garage conversions, detached cottages, and basement suites. Founded by Eric Young and Jason Gelblum, they manage zonin... read more
Ben Norkin Architecture outlines ADU permit drawing requirements in Montgomery County, MD, covering site plans, zoning, drainage, floor plans, structural drawings, and energy compliance for detached ADUs, garage conversions, and backyard cottages.... 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.