What Outerbridge Horsey Associates does

Outerbridge Horsey Associates, PLLC is a boutique architecture firm founded in 1987 by principal Outerbridge Horsey and headquartered in Georgetown, Washington D.C. The practice operates as a seven-person design studio serving high-net-worth residential clients, with secondary work in institutional and specialty retail architecture. Its core offering is custom residential design services covering new houses, additions, and renovations, characterized by close adherence to client requirements, use of high-quality materials, and site-responsive design integrated with the surrounding landscape.

The firm's geographic footprint is centered on the Washington D.C. metropolitan area — including Chevy Chase, Great Falls, Washington D.C., Maryland's Eastern Shore, and the Blue Ridge Mountains of Virginia — with selective extended projects in Newport, Rhode Island and Antigua, Guatemala. As a privately held PLLC with no external funding, acquisitions, or disclosed parent company, the firm is structured as a principal-led professional services practice.

The business model is professional services revenue generated through project-based commissions, acquired primarily through direct client engagement, principal reputation, and word-of-mouth referrals rather than formal marketing. The firm maintains a minimal digital presence through its website, Yelp, Pinterest, and Facebook profiles, functioning as portfolio showcases rather than active lead-generation channels. No pricing, AI/technology capabilities, partnerships, awards, or patents are publicly disclosed.

Name

Outerbridge Horsey Associates

Legal name

Outerbridge Horsey Associates, PLLC

Website

https://outerbridgehorsey.com

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

11–50 employees

Short description

Outerbridge Horsey Associates, PLLC is a seven-person boutique architecture firm founded in 1987 in Georgetown, Washington D.C., providing custom residential, institutional, and specialty retail design services primarily to high-net-worth clients across the DC metro area and select remote locations.

Ownership category

akta.pro rank

Headquarters

HQ city

Washington

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Architecture and Design Services: Professional services revenue generated through custom residential architecture projects including new houses, additions, and renovations, as well as institutional and specialty retail design engagements. Projects range from local DC metro area commissions to remote locations including Newport, RI and Antigua, Guatemala.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Outerbridge Horsey Associates, PLLC is a seven-person architecture firm that provides custom architectural design services. The firm's core offering is custom residential architecture, including new houses, additions, and renovations, with additional work in institutional and specialty retail design. Services are delivered by a principal-led boutique studio based in Georgetown, with projects spanning the Washington DC metro area to Maryland's Eastern Shore, Virginia's Blue Ridge Mountains, Newport, RI, and Antigua, Guatemala.

Product overview

Outerbridge Horsey Associates, PLLC is an architecture firm offering custom residential, institutional, and specialty retail architectural services. The firm's core offering is its custom residential architecture practice, providing design services for new houses, additions, and renovations. The practice operates from a single office in Georgetown and serves clients across the Mid-Atlantic region and beyond.

Differentiator

Problem solved

Functional benefit

Products and services

• Custom Residential Architecture Services Full-service architectural design for custom residences including new houses, additions, and renovations, serving clients across the Washington DC metro area, Maryland's Eastern Shore, Virginia's Blue Ridge Mountains, and extending to Newport, RI and Antigua, Guatemala.

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators2 records

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• Perkins&Will: Perkins&Will is a major global architecture and design firm with deep practices in healthcare, higher education, and commercial sectors. It is a broad incumbent peer to OHA in architecture broadly, but its scale, project types, and client base differ materially from OHA's boutique residential focus.
• Gensler: Gensler is the world's largest global architecture and design firm, with practices spanning commercial, hospitality, residential, and institutional work. It is a broad incumbent peer that overlaps with OHA's architectural services but operates at vastly greater scale and across all major building types.
• HOK: HOK is a large global architecture, engineering, and planning firm with major practices in commercial, healthcare, aviation, and institutional sectors. It is a broad incumbent peer to OHA in the broader architectural services category, though it serves fundamentally different client and project profiles.

Direct peers

• Ike Kligerman Barkley: Ike Kligerman Barkley is a New York-based architecture firm specializing in high-end custom residential, country houses, and historic renovation projects. It is a direct peer to OHA as a boutique luxury residential practice with a sophisticated, traditional design sensibility.
• Peter Pennoyer Architects: Peter Pennoyer Architects is a Manhattan-based firm specializing in classical and historically inspired custom residential architecture for high-net-worth clients, townhouses, and historic preservation. It is highly comparable to OHA in its small-team, principal-led, premium-residential model.
• Robert A.M. Stern Architects: Robert A.M. Stern Architects is a New York-based boutique architecture firm known for traditional and classically influenced luxury residential, institutional, and mixed-use design. It is a direct peer to OHA as a similarly sized, reputation-driven practice serving affluent clients with custom architectural services.
• Harrison Design: Harrison Design (formerly Harrison Design Associates) is a multi-office architecture firm specializing in custom luxury residential design, historic renovation, and estate planning. It is a direct peer to OHA given its boutique scale, residential focus, and affluent client base across multiple premium markets.
• Fairfax & Sammons Architects: Fairfax & Sammons is a New York and Florida-based architecture firm specializing in classical and traditionally inspired custom residential design for affluent clients. It is a direct peer to OHA in its boutique scale, luxury residential focus, and emphasis on stylistic fidelity and quality.
• McAlpine Tankersley Architecture: McAlpine is a Southern-based architecture firm with a strong reputation for custom luxury residential work, including primary residences, coastal homes, and country houses. It is a direct peer to OHA in its small-firm, high-quality, traditionally oriented residential practice.
• Historical Concepts: Historical Concepts is an Atlanta-based architecture and planning firm specializing in custom luxury homes, residential communities, and historically grounded design. It is a direct peer to OHA in its boutique, principal-led model serving affluent residential clients across multiple geographies.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/pages/Outerbridge-Horsey-Associates-Pllc/165214943504895
• Pinterestpinterest.com/pin/26177241557886193
• LinkedInlinkedin.com/company/outerbridge-horsey-assoc

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Outerbridge Horsey Associates