O'Sullivan Architects

O'Sullivan Architects O'Sullivan Architects is a team of architects, project managers, designers, and LEED professionals co

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 ten 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 fu

nctional, 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 and 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.

Construction is moving forward on this new townhouse project in Rye, NH, with the foundations now well underway. It's al...
09/02/2026

Construction is moving forward on this new townhouse project in Rye, NH, with the foundations now well underway. It's always exciting to see a project move from drawings to the field.
More progress to come! 👷🏗️

🏗️Currently under site plan review in Leicester, Massachusetts, this new mixed-density residential project features a di...
08/28/2026

🏗️Currently under site plan review in Leicester, Massachusetts, this new mixed-density residential project features a diverse range of housing types, from ranch-style duplexes to multifamily apartments, creating a variety of living options within one cohesive community.

The site plan is thoughtfully designed around the existing landscape of the former golf course, working with the natural character of the property while preserving existing landscape features . 🌿

By balancing a range of unit types with a site-sensitive approach to development, the project aims to create a residential community that complements its surroundings and makes the most of the existing landscape.

Exciting progress on this renovation and new addition in Rye, NH!This project is taking shape beautifully, with new spac...
08/26/2026

Exciting progress on this renovation and new addition in Rye, NH!
This project is taking shape beautifully, with new spaces designed to enhance the home while staying true to its existing character. We’re excited to see the vision come to life as construction continues.
More progress to come!👷🏗️

🔄 Reintroducing a new vision for Greenwood Street in Melrose!Originally proposed as a 24-unit condominium development, t...
08/21/2026

🔄 Reintroducing a new vision for Greenwood Street in Melrose!

Originally proposed as a 24-unit condominium development, the project has been thoughtfully redesigned to create two new five-unit townhouse buildings, while preserving the historic home on the existing lot. The historic residence will be reconfigured into a two-unit condominium, maintaining the character of the existing property while introducing a new residential concept. 🏡✨

We’re excited to bring this updated design to life and continue the evolution of Greenwood Street.

🏗️ During our office tour, we stopped by one of our projects currently under construction in Stoneham, MA. It’s always e...
08/20/2026

🏗️ During our office tour, we stopped by one of our projects currently under construction in Stoneham, MA. It’s always exciting to watch a design take shape and see the project come to life. With the finish line getting closer, we’re looking forward to seeing the final vision come together! ✨👷‍♀️

A unique-shaped lot in Hyde Park presented an opportunity for a contemporary architectural design tailored specifically ...
08/14/2026

A unique-shaped lot in Hyde Park presented an opportunity for a contemporary architectural design tailored specifically to its site. We’re pleased to share the design of this new project as it moves into the approvals process. We look forward to seeing the design progress from concept to reality. 🏗️

A day in the field with our team! We spent the day touring several of our active project sites, checking on progress, co...
08/07/2026

A day in the field with our team! We spent the day touring several of our active project sites, checking on progress, collaborating on design solutions, and seeing our work come to life. These site visits help us keep every project moving in the right direction while staying true to the quality and attention to detail we value.
Bonus: we got our daily steps in without even trying! 👷‍♀️🏗️

🏗️📐

At O’Sullivan Architects, we believe great design is about creating places where people enjoy living, spaces that are ti...
07/31/2026

At O’Sullivan Architects, we believe great design is about creating places where people enjoy living, spaces that are timeless, comfortable, and built to serve the community for years to come.
Designed to support modern living, this 13-unit residential building in Lexington combines comfort, functionality, and timeless architecture.
Each unit features spacious layouts, large windows that bring in abundant natural light, private balconies, elevator access, and carefully planned amenities that make everyday living more enjoyable. Universal design principles were incorporated throughout the building to create spaces that are accessible, practical, and welcoming for everyone.
Located near public transportation, the building offers the convenience of easy commuting while providing a comfortable place to call home in one of Massachusetts’ most desirable communities.
A thoughtful design that balances quality, accessibility, and the needs of today’s residents.

Designing within a golf course community means every detail matters. This home was carefully developed to meet the neigh...
07/22/2026

Designing within a golf course community means every detail matters. This home was carefully developed to meet the neighborhood’s architectural design guidelines while creating a timeless, welcoming residence.
From the roof materials and siding to the windows, color palette, every element was thoughtfully selected to complement the character of the community. These progress photos offer a glimpse into the construction process and the attention to detail behind bringing the design to life.
We look forward to sharing the finished home soon.

'Sullivan

At O’Sullivan Architects, we believe great design should complement its context while meeting the needs of today’s lifes...
07/17/2026

At O’Sullivan Architects, we believe great design should complement its context while meeting the needs of today’s lifestyle. This three-unit townhouse in Andover thoughtfully repurposes an existing office building, preserving much of its original exterior character while transforming it into modern, comfortable homes. Bright interiors, refined finishes, and functional layouts create living spaces designed for today’s generation.
We are proud to have reimagined this property, giving it a new purpose while maintaining its connection to the neighborhood.

Address

606 Main Street, Suite 3001
Reading, MA
01867

Opening Hours

Monday 7:30am - 6pm
Tuesday 7:30am - 6pm
Wednesday 7:30am - 6pm
Thursday 7:30am - 6pm
Friday 7:30am - 6pm

Telephone

+17814396166

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