Architects in Washington, DC

Aggregate Architecture + Design, PLLC is a Washington, D.C.–based architecture and design firm that delivers thoughtful, context-driven residential and commercial projects through a collaborative, research-informed process. Aggregate Architecture + Design provides full-scope architectural services—from conceptual design and planning through detailed documentation and client coordination—focused on craft, livability, and sensitive urban response; the company emphasizes clear client communication, a rigorous design process, and creating durable, well-executed buildings that enhance neighborhood character.

Ballard + Mensua Architecture is a residential architecture firm based in Washington, DC, serving Northern Virginia, Maryland, and surrounding areas. Since 2005, the company has specialized in custom home design, historic preservation and restoration, and large-scale renovations and additions. The firm is dedicated to creating lasting, personal spaces tailored to clients' sites and lifestyles. Their expertise includes kitchen remodels, bathroom renovations, and smaller interior projects, all executed with a strong commitment to detail and collaboration. Ballard + Mensua Architecture guides clients through every phase of the architectural process, from initial concept to construction, ensuring projects are both inspiring and enduring.

Barnes Vanze Architects is a Washington, D.C.–based architecture firm founded in 1989 and headquartered in Georgetown. Barnes Vanze Architects designs and delivers historically informed and contemporary residential, commercial, institutional, and ecclesiastical projects—ranging from restorations, renovations, and additions to bespoke new homes—while integrating interior design and preservation expertise. The company emphasizes craftsmanship, context-sensitive design, and client-focused collaboration to produce award-winning, enduring architecture throughout the region and beyond.

Bonstra | Haresign ARCHITECTS is a Washington, DC–based architecture and planning firm of roughly 30 architects and designers that creates context-sensitive, sustainable, and well-crafted solutions for urban infill, mixed-use, transit-oriented development, historic preservation, adaptive reuse, and residential and interior projects. Bonstra | Haresign ARCHITECTS uses a process of thoughtful analysis, discovery, and collaboration to deliver integrated living environments and civic projects that respond to site and stakeholder needs, emphasizes attention to detail and design excellence across every scale, and is recognized through multiple awards and national publications while maintaining a collegial, partner-led studio culture from conception through completion.

Cunningham | Quill Architects is an award-winning architecture and planning firm with offices in Georgetown (Washington, DC) and Tryon Plaza (Charlotte, NC). Cunningham | Quill Architects provides complete professional services in architecture, community planning, and urban design across commercial, institutional, single- and multi-family residential, adaptive reuse and historic preservation, and master planning projects. The company emphasizes context-sensitive, research-driven design delivered by a team of experienced professionals and focuses on creating sustainable, site-responsive, and enduring built environments that have earned numerous design awards.

Donald Lococo Architects is a small, studio-based architectural practice located in Bethesda, Maryland. Founded and led by Donald Lococo, the firm emphasizes a personalized and hands-on approach to architecture, with the principal working closely with apprentices and staff in a collaborative studio environment. The company has received numerous awards and publications, reflecting its commitment to design excellence. The firm offers architectural services that focus on thoughtful, innovative design solutions, and it values long-term relationships with clients and employees. Donald Lococo Architects is dedicated to creating meaningful architecture with a strong emphasis on craftsmanship and attention to detail.

ISTUDIO Architects is a Washington, D.C.–based architecture and planning firm that designs civic, cultural, educational, residential, and commercial projects with a strong emphasis on community engagement, sustainability, and context-sensitive design. ISTUDIO Architects provides architectural design, planning, and implementation services for public-sector and private clients — delivering recreation centers, schools, community and environmental centers, public safety and infrastructure facilities, and distinctive residential work — and the company combines collaborative processes and research-informed solutions to create resilient, site-responsive places that support neighborhood needs and long-term stewardship.

KUBE Architecture PC is a Washington, DC–based architecture and planning firm that delivers award-winning design across residential, mixed-use, commercial, hospitality, and urban design projects. KUBE Architecture PC combines context-driven, research-informed design with an integrated studio process to create thoughtful, site-responsive buildings and interiors; the company emphasizes collaborative problem-solving, creative exploration, and high-quality execution to transform neighborhoods and enhance everyday urban life.

Landis Architects and Builders is a Washington, D.C.–based design-build firm established in 1990 that delivers end-to-end residential and commercial architecture and construction services, including kitchens, bathrooms, additions, whole-home remodels, custom homes, exteriors, outdoor living, historic renovations, condominiums, and commercial projects such as office and corporate housing. Landis combines in-house architectural design and construction expertise to manage projects from concept through completion, emphasizes craftsmanship, integrated project delivery, and client collaboration, and leverages decades of regional experience and award recognition to create durable, site-responsive spaces across the D.C. metro area and neighboring communities.

Lawlor Architects is a Capitol Hill–based residential architectural firm established in 2003 that specializes in thoughtful, clean-lined single-family homes and comprehensive design services from schematic design through construction. Lawlor Architects emphasizes a collaborative, principal-led approach that delivers tailored, sustainable, and well-crafted homes by guiding clients through design decisions, materials, building systems, and budgets to produce site-responsive, award-winning residences in the Washington, D.C. region.