Live Less Ordinary.SM

O'Sullivan Architects is dedicated to creating the right structure for your needs.

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What We Do



O'Sullivan Architects is involved in the earliest stages of a building project, developing ideas with the client, establishing budgets, assessing the needs of the building for its users, and overall impact within the local environment.


Interior Design

Our interior design process starts with listening to our clients, to create spaces that are enjoyable to live in, work, or play. We also provide in-house graphic capabilities ranging from hand-rendering to 3D computer modeling.


Land Planning

Our land planners work closely with engineers, surveyors, zoning boards, neighborhood associations, and environmental professionals to prepare plans that are realistic, cost-effective, balanced, and technically sound.

We’re an architecture firm north of Boston, dedicated to working closely with clients to help them realize their project goals, and we’ve done so for over twenty-three years.  We pride ourselves on our versatility, as we are capable of taking on a broad range of project types and locations, ranging from small home additions to large condominium developments and commercial projects.


Whether it’s designing functional, livable and beautiful spaces, navigating often complex municipal approval processes, designing for LEED certification, or coordinating with a multitude of engineers, consultants and contractors, our breadth of experience helps ensure a positive result for our clients.


The process of selecting an architect can sometimes be daunting, and we try to maintain a close working relationship with our clients to ensure that client input is understood, appreciated and above all, listened to.  This is essential to making our projects successful for our clients, and why we love what we do.

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