Brennan + Company

brennan + company architects is a 32-year-old, 3-person architectural design firm located in an historic 1903 renovated, wood-framed repurposed church in the historic mill town of Oella, Maryland. We specialize in beautiful and smart community buildings and residences, both new and renovated. We promote building preservation and reuse as critical to sense of place. We design holistic, sustainable environments for healthy and efficient living.

We are committed to a sustainable and historically sensitive design solutions through a collaborative and creative design process. We begin with the client's requested requirements, budget and design spirit to create an imaginative and thoughtful conceptual response to projects large and small, existing and new. The design develops through an ongoing review process with the client, culminating in the details and specifications necessary for bid and construction. We monitor the client's budget during the design process by submitting the project to selected contractors for preliminary pricing prior to preparing drawings for bid, permit and construction. The result is a richly detailed and described project, one that takes into consideration history, proportion, scale, appropriateness, environmental impact and affordability.

For those clients who have a special interest in having the least impact on our environment and who desire a high level of attention to a healthful indoor experience, we offer our expertise in sustainable building design. As a normal part of our schematic design package, we develop a summary of specific design considerations that the client may elect to incorporate into their project. At the earliest point in the thought process, we are also available to accompany clients to houses and lots that they are considering purchasing. This is the best practice to make the right choice for house orientation, site development issues and architectural style and finish considerations.

Rob Brennan

Rob Brennan

AIA, Principal

Rob Brennan, AIA, Principal, graduated with a Master of Architecture and Certificate in Historic Preservation from the University of Virginia in 1981. He received his Bachelor of Science in Architecture from The Catholic University of America. He has over thirty years of experience in residential, educational and community projects in the Baltimore-Washington region. Rob also founded and owned Alterego, a sustainable building finish products retailer, from 2003-2013.

Rob is the Chair of the Baltimore County Landmarks Preservation Commission, President of the Baltimore Architecture Foundation and Past-President of AIA Baltimore. Rob currently sits on the Boards of Preservation Maryland. He is also Chair of the Design Committee of the Ellicott City Partnership and sits on the Ellicott City Master Plan Advisory Team and the Maryland Historical Trust Statewide Preservation Plan Advisory Committee. Previously, he served on the Board of the Friends of Druid Hill Park and chaired their Historic Preservation Committee. He was chair of the St. Mark Church Parish Center Building Committee, past President of the St. Mark School Board and Vice President of the Parish Council. Rob has also served on the Baltimore County Streetscape and Bloomsbury Community Center Task Forces in Catonsville.

Rob and his spouse Chris live in a 1913 Four-square in Catonsville and are empty-nesters with three college-grad children, two with architecture degrees.

Carri Beer

Carri Beer

AIA, Associate Principal, Permaculture Designer

Carri Beer, AIA, Associate Principal, has been with the firm for 15 years. Carri graduated with a Master of Architecture from Texas Tech University with special study in sustainable design. She has experience with commercial and residential projects, government clients and private clients. Carri became one of Maryland’s first LEED Accredited Professionals in 2001 and consulted on several of the region’s early LEED projects.  She received her Permaculture Design Certificate from Charm City Farms in 2017 and is currently pursuing an Advanced PDC in Social Permaculture from the Permaculture Women’s Guild. She is Project Architect and Manager on new high performance, net zero ready, healthy homes + renovations. Carri focuses on creating architecture that is holistic + addresses high-energy performance, building science, air quality, materials, resiliency, site + water restoration and social equality.

Carri is past co-chair of the AIA Baltimore Committee on the Environment + Resiliency and current Vice President of her local Cooperative Market. She has served as the co-facilitator for the bMORE Living Building Collaborative, served on Baltimore County Commission on Environmental Quality + founded Common Ecology, an on-line community resource for sustainable lifestyle change.  Carri is currently renovating her 1954 Catonsville home to be a net zero, no foam, healthy and resilient Home and landscape.  See her progress here.

Carri mothers three children ranging in age from 8-18.

Lili Mundroff

Lili Mundroff

Assoc. AIA, Associate, Project Manager

Lili Mundroff, Assoc AIA, has been with the firm for 13 years. She graduated with a Master of Architecture, with a focus in Historic Preservation, Bachelor of Science in Architecture and a Bachelor of Arts in Italian Language and Literature from the University of Maryland at College Park. Her thesis project was urban and environmental in nature, exploring the design of buildings and spaces on the edge of Baltimore City’s historic Druid Hill Park. She exemplifies brennan+company’s commitment to historic preservation and sustainable design.

Lili serves on the Doors Open Baltimore Committee within the Baltimore Architecture Foundation, a two-day event of touring historic buildings and places in Baltimore. She graduated from AIA Baltimore’s Civic Lab program, nationally recognized by the American Institute of Architects as a model program for civic engagement by architects. Additionally, Lili supports the AIA Baltimore Equity Committee in their meeting, programming and planning for events to raise awareness for expanding diversity in the architecture profession.

Lili is the mom to two boys, ages 13 and 14.


Historic Preservation
brennan+company has a passion for historic preservation and believe in our commitment to maintain our region’s architectural heritage. We take great pride in our sensitivity to historic structures and old houses and respect them with appropriate additions and renovations.
Sustainable Architecture
A core philosophical pursuit of brennan+company architects is to provide architecture that is environmentally responsible, beautiful and creatively executed. We believe it is our fundamental duty to educate the public on humanity's effect on the environment and to diminish negative impact on our ecosystem. It is our goal to visualize and implement a better quality of life for all of our clients. This involves looking at projects with a holistic approach to explore its impact on architecture, environment, agriculture, the economy and the community.
Master Planning
brennan+company architects enters a project in a thoughtful and considered manner. The master plan, on any number of levels, is a necessary tool that must be in place to focus future conversation and expenditures wisely. We have provided many clients with master plans that delineate phases for their projects in a logical order to avoid redundancies and increase implementation.
Integrated Design Team
We firmly believe in an integrated team approach to our projects. This involves bringing all parties to the table, including the owner, the users, builder, the community and the project consultants to engage in a collaborative discussion of the issues and goals. The result is ultimately an efficient and focused endeavor to bring a sustainable design and planning approach to the construction process.
Community Involvement
Community review and comment is critical to the success of a project. There are zoning, historic review, and building code issues to identify and address. We have appeared before boards on variance, special exception, and historic issues in most of the entities in and around Washington, DC, Baltimore and Frederick, Maryland and Alexandria and Arlington, Virginia. We have heard the comments, consulted the owners, and implemented the changes to keep the project moving forward.
Healthy Live and Work Environments
brennan+company strongly believes you should love your house. This emotion inspires happiness, peace and good family time. Our home and work spaces must be healthy and pleasant places to spend our time. Well-designed, finished and lighted space encourages more productive and engaged work. Fresh air, views and a sense of ownership for the employee and the public instill pride of place and ultimately increase its usefulness, utility and longevity.


Preservation Maryland
Stewardship Award
May 2019
bMORE Resilient Competition
Most Resilient Concept
September 2015
AIA Maryland Student Design Awards
Citation, Aqua Terra
September 2015
Best of Houzz
Design (Staircase) DC
January 2015
Natural Home Magazine
Kitchen of the Year 2009
AlA Baltimore 2008 Design Awards
Honorable Mention
October 2008


Baltimore Magazine 2019
April 2019
Fine Home Building 2012

Also seen in: Home & Design Source Book, Architecture DC, Chesapeake Home Magazine, Dwell Magazine, Baltimore Magazine, Urbanite Magazine, National Green Pages, Urbanite Home & Design Source Book,, Preservation Source Book