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Business Details
36 Years
experience
Warren Street Architects: Design Excellence in NH
Founded in 1990, Warren Street Architects has evolved from its origins as Sherman Greiner Halle' into a pioneering employee-owned cooperative design firm. Our 17-member team includes licensed architects, landscape architects, interior designers, and sustainability professionals dedicated to delivering exceptional design solutions. With expertise spanning corporate, commercial, municipal, education, healthcare, and residential sectors, we specialize in new construction, renovations, historic preservation, and adaptive reuse projects.

Our employee-owned structure fosters a culture of collaboration, balance, and mutual success that directly benefits client projects. Recognized for combining traditional values with cutting-edge solutions, we maintain active involvement in community development and sustainable design practices. Our diverse portfolio demonstrates consistent achievement of creating enduring spaces that enhance human experiences through thoughtful planning and innovative execution.
Services
Architecture Landscape Architecture Interior Design Planning & Urban Design Historic Preservation Sustainable Design Commercial Development Public Sector Projects Residential Design Project Management
Details
  • Year established: 1990
Highlights and features
  • Employee-owned cooperative ensures client-focused commitment
  • 30+ years of diverse architectural experience in New England
  • LEED and WELL accredited sustainability professionals on staff
  • Specialized expertise in historic preservation and adaptive reuse
  • Collaborative approach combining architecture, landscape, and interiors
Associations and certifications
  • LEED
  • WELL
Services
Architecture
Our architectural services encompass full-spectrum design solutions from concept through construction. We specialize in creating functional, aesthetically compelling spaces for commercial, institutional, and residential projects. Our team maintains active involvement in every phase to ensure design integrity and client satisfaction.
Landscape Architecture
We create integrated outdoor environments that enhance usability and sustainability. Services include site planning, stormwater management, and hardscape design. Our approach balances ecological responsibility with practical functionality for both public and private spaces.
Interior Design
NCIDQ-certified designers develop interior environments that optimize workflow and occupant well-being. We handle space planning, material selection, and FF&E specification across corporate, healthcare, and hospitality sectors while maintaining LEED/WELL compliance.
Historic Preservation
Specialized expertise in maintaining historical integrity while meeting modern requirements. Our team navigates regulatory processes and implements preservation techniques that extend building lifespans without compromising architectural significance.
Sustainable Design
LEED and WELL accredited professionals implement energy-efficient systems and sustainable materials. We provide lifecycle analysis and environmental impact assessments to achieve certification goals while reducing operational costs for clients.
Questions
What architectural services do you offer?
We provide full-service architecture including new construction, renovations, historic preservation, and sustainable design across commercial, residential, and public sectors.
Do you work outside New Hampshire?
While based in Concord, we handle projects throughout New England and maintain satellite offices in key regional locations.
Are you LEED certified?
Yes, we have LEED Accredited Professionals on staff who implement sustainable design strategies and pursue green building certifications.
How does your cooperative structure benefit clients?
Our employee-owned model fosters collective accountability, ensuring every project receives dedicated attention from our most experienced professionals.
Can you handle historic building renovations?
Our team specializes in historic preservation with extensive experience maintaining architectural integrity while modernizing systems and accessibility.