“Understanding the intertwined relationships of people and nature is key to the design of landscapes that address people’s needs while respecting the need to protect natural systems and create a truly sustainable world environment.”

– David Lashley, Principal Landscape Architect

At Lashley + Associates, our experienced landscape architectural associates are a creative, quality oriented, and cohesive team that work seamlessly together to provide high quality services and excellence in design. The firm has the staff, capability and experience to provide a complete range of landscape architectural services including:

Brownfield Redevelopment
Campus Planning & Design
Ecological Restoration
Environmental Assessments
Green Roof Design
Historic & Cultural Landscapes
Hotels & Resorts
Institutional Design
Interior Plantscape Design
Land Conservation & Reclamation
Land Use Planning & Public Consultation
Master Planned Communities
Office & Retail Developments
Parks, Playgrounds & Sports Fields
Recreation Planning
Residential Development ‐ Multi‐family
Residential Garden Design
Resource Management/Regional Planning
Stormwater Management / Low Impact Developments
Streetscape & Downtown Revitalization
Sustainable Landscapes
Theme Parks & Leisure Planning
Therapeutic Gardens
Trails & Greenway Design
Transportation & Bikeways Corridors
Tree Preservation Plans & Tree Conservation/Arborist Reports
Urban Design
Visual Assessment
Waterfront Development & Restoration
Wetland Remediation & Stream Corridor Restoration

Our ability to offer creative solutions to design problems with successful implementation is what our firm holds true to our clientele. Through close liaison with our clients and coordination with other professionals involved in any project, we have achieved and maintained the results needed to make both our firm and our clients proud.


Evidence of our exemplary design services and award winning projects include:

Ottawa Heritage Awards, Award of Merit, National War Memorial (2018)

Ottawa Architectural Conservation Award of Excellence, Addition – 32 Cameron Ave (2014)
Canadian Society of Landcsape Architects Regional Merit Award – Shaw Centre (Ottawa Convention Centre) (2012)
Ottawa Convention Centre, Urban Design Award, City of Ottawa (2011)
Huron Early Learning Centre, Environmental Award, City of Ottawa (2011)
Old Ottawa South Community Centre, Heritage Award of Excellence, CSV Architects (2011)
Algonquin College Pembroke Renaissance Campus Design/Build Competition (2011) 2nd place
Algonquin College Construction Trades Building Design/Build Competition (2010) 3rd place
Glebe Community Centre Urban Design Award (2006)
Building 57 at the Central Experimental Farm Urban Design Award (2006)
Rideau Hall Stables Renovation Urban Design Award (2005)
West Hunt Club Road at Moodie Drive Realignment TAC Environmental Award (2000)
Sandy Hill Health Centre, Nelson Street, Ottawa , Urban Design Award(1994)
Conservation Co-op, Green Council Award (1998)
Trailhead Warehouse and Retail Store, Scott Street, Ottawa Financial Post Design Award (1994)
La Cité Collégiale Design Competition (1991), 2nd place
Park Plaza at the Ottawa Business Park Design Competition (1989) winner
CANLANDS (World Exchange Plaza) urban development submission (1988), 2nd place


More recently, the firm is working on a number of high profile projects, some of which are still in the construction phases and include:

Rideau Hall Front Court Redevelopment, NCC
Richelieu Daycare, City of Cornwall
Tomlinson Headquarters, TAL-CO Building Innovations LTD
Somerset O-Train Bridge, City of Ottawa
Shefford Park, City of Ottawa
The National War Memorial – Phase II Restoration, PWGSC
Accora Village Landscape Masterplan, Ferguslea properties limited
Elmwood School Site Development, Elmwood School
Littlerock Park, City of Ottawa
Arnprior Dowtown Streetscapes, Town of Arnprior
The Carling Campus Site Development, PWGSC/DND
Cardinal Creek Village Master Plan, Tamarack Homes
OC Transpo Station Accessibility Improvements, City of Ottawa
Mutchmor School Redevelopment Plan, OCDSB