Terrence J. DeWan & Associates is a professional landscape architectural and planning firm in Yarmouth, Maine dedicated to approaching land use opportunities with creativity, environmental sensitivity, and an awareness of client needs.

The staff of eight is composed of professionals with backgrounds in landscape architecture, recreation planning, land planning, visual resource assessment, permitting, graphic design, model making, research, and technical writing.

tjd&a is committed to appropriate design solutions that evolve from effective communication with the client and municipal and state officials. The firm has an underlying commitment to land stewardship and faith in the future of New England.

The services offered by the firm include:

Site Planning and Design

Site analysis; single family homes; residential subdivisions; cluster housing; apartment and condominium complexes; land reclamation; commercial, institutional, and industrial site planning; landscape restoration.

Master Planning

Site selection studies; open space planning; campus planning; waterfront planning; municipal comprehensive planning; zoning and land-use studies; resort communities; resource management studies; natural resource inventories.

Recreational Planning

Municipal inventories; waterfront land use studies; park, playground and facility design; trail planning; recreation management.

Downtown Revitalization

Community design forums; streetscape improvements; urban plantings, lighting, and signage design; corridor planning; pedestrian amenities.

Visual Inventories and Assessment

Scenic inventories; facility siting; highway location studies; transmission line studies; windpower visual studies, visual impact assessments; mitigation planning.


Coordination of applications under Maine's NRPA (Natural Resource Protection Act), Maine Department of Environmental Protection (DEP) Site Location of Development Permit, and Army Corps of Engineers Permits.

Construction Documentation and Administration

Complete Construction Documentation; Specifications; Bid Packages; Construction Administration.

tjd&a Terrence J. DeWan & Associates

121 West Main Street
Yarmouth, ME 04096
t  207.846.0757
f  207.846.0675
e  dewan@tjda.net

Terry DeWan FASLA, Principal
Amy Bell Segal ASLA, Associate
Keith Smith LEED AP, Associate
David Truesdell ASLA, Landscape Architect
Danielle Matkoskey, Designer
Jessica Wagner Kimball, Landscape Architect & Planner
Steve Thompson, Designer
Eileen Butler, Business Manager, Associate