Harmsen/ASPI, LLC is a vendor listing name associated with Harmsen, LLC, a multidisciplinary land development and engineering firm based in Washington State. Harmsen was founded by Bill Harmsen in Monroe, Washington, in 1974. The company subsequently expanded its services and geographic coverage through acquisitions, including Alpha Subdivision Professionals, Inc. (ASPI) in Everett in 2016.

Harmsen provides civil engineering, land surveying, construction staking, land use planning, environmental services, and related technical support for public and private sector projects. Its team includes engineers, professional land surveyors, planners, wetland specialists, drone mapping professionals, and administrative staff who support a variety of development requirements.

The firm’s projects range from individual residences and residential subdivisions to commercial centers, industrial parks, educational facilities, healthcare properties, municipal improvements, and parks. Its multidisciplinary approach helps clients coordinate site planning, infrastructure design, surveying, regulatory requirements, and environmental considerations.

Harmsen emphasizes practical engineering, sustainable development, accurate survey information, and responsive client service. Its regional presence supports property owners, developers, architects, contractors, public agencies, and other professionals working on land development projects throughout Western Washington.

For additional information, visit the official Harmsen website.

Civil Engineering Services

Civil engineering is an important part of land development, helping project teams plan site layouts, utilities, drainage, access, roads, and related infrastructure. Harmsen provides civil engineering services for projects ranging from single-family homes to large commercial, industrial, residential, and public developments.

Its published engineering capabilities include site design, grading and paving plans, storm drainage systems, stormwater facilities, sanitary sewer systems, water systems, erosion control, and surface water pollution prevention plans (SWPPP).

The firm also provides roadway design, parking layouts, sidewalks, trails, frontage improvements, pavement evaluation, pavement rehabilitation design, feasibility studies, constructability reviews, and construction administration.

These services help project teams evaluate site conditions, coordinate infrastructure requirements, and develop construction documentation. Effective civil engineering can also help clients consider constructability, regulatory requirements, environmental impacts, and infrastructure costs during project planning.

Harmsen works with owners, architects, contractors, municipalities, school districts, utility providers, and other stakeholders to develop practical solutions for specific sites and development objectives.

Land Surveying and Mapping

Accurate land surveying provides essential information for property development, boundary documentation, engineering design, and construction. Survey data helps project teams understand property lines, elevations, existing improvements, site features, and other conditions that influence planning and design.

Harmsen offers professional land surveying services for public and private clients. Its surveying capabilities support residential properties, subdivisions, commercial developments, industrial sites, and public infrastructure projects.

Surveying can be particularly important before construction begins, when accurate information is needed to establish boundaries, prepare site plans, coordinate infrastructure, or document existing conditions.

The company also provides construction staking and aerial mapping capabilities. The appropriate survey scope depends on the property, project objectives, jurisdictional requirements, and the information needed by the design or construction team.

Clients can contact Harmsen to discuss their surveying requirements and determine which services are appropriate for a specific site.

Construction Staking Services

Construction staking translates approved design information into physical reference points on a project site. Accurate staking helps contractors establish the intended positions and elevations of buildings, roads, utilities, and other improvements.

Harmsen identifies construction staking as one of its core services. This work can support residential developments, commercial projects, infrastructure improvements, and other construction activities requiring accurate field layout.

Construction staking is important because errors in positioning or elevation can lead to rework, delays, additional costs, or conflicts with other site improvements. Coordination between surveyors, engineers, and contractors helps ensure that field work follows the intended design.

The required staking services vary according to project size, construction sequence, and the level of detail specified in the construction documents. Project owners and contractors should coordinate with the firm to establish the required scope and schedule.

Land Use Planning and Development Consulting

Land use planning addresses how a property may be used and developed within the applicable planning and regulatory framework. Zoning, development standards, site access, setbacks, infrastructure, and environmental constraints can all influence what is possible on a particular parcel.

Harmsen provides land use planning services for public and private sector clients. Its team works with clients to understand planning requirements and coordinate the technical considerations associated with development proposals.

Land use planning may involve reviewing applicable regulations, evaluating site constraints, coordinating with local jurisdictions, and identifying information required to advance a development application.

For projects involving subdivisions, residential plats, commercial development, or changes to existing properties, early planning can help clients understand the process and identify potential issues before committing to more extensive design or construction work.

The appropriate planning scope depends on the jurisdiction, property conditions, proposed use, and approvals required for the project.

Environmental and Wetland Services

Environmental considerations can influence site planning, permitting, and construction. Wetlands, drainage patterns, vegetation, and other environmental conditions may require evaluation before a property can be developed or modified.

Harmsen offers environmental services, including wetland delineation, permitting, restoration, and mitigation. These services help clients understand environmental constraints and coordinate the requirements associated with development proposals.

Depending on the project, environmental work may involve site investigations, documentation, coordination with regulatory agencies, and planning for appropriate mitigation measures. The scope varies according to site conditions and applicable regulations.

Environmental services are particularly relevant when a proposed development intersects with wetlands, drainage features, or other regulated areas. Early identification of these considerations can help project teams make informed decisions about site layouts, permitting requirements, and project schedules.

Clients should confirm the specific environmental services required for their property directly with Harmsen.

Sustainable Site Design and Stormwater Management

Sustainable site design considers how development can meet functional requirements while respecting land conditions and environmental resources. Stormwater management, erosion control, drainage design, and low-impact development techniques may all contribute to a project’s environmental performance.

Harmsen states that it has practiced sustainable, low-impact civil engineering design for more than 25 years. Its published services include stormwater facilities, surface water pollution prevention plans, erosion control, and low-impact development design.

These services can help development teams evaluate how runoff moves across a site and how drainage systems should be coordinated with buildings, roads, parking, and other improvements.

Sustainable engineering also requires attention to site-specific conditions, applicable standards, construction methods, and maintenance considerations. The appropriate approach depends on the project’s location, size, environmental constraints, and regulatory requirements.

Harmsen works to balance project objectives with practical engineering solutions and responsible land development.

Projects and Industry Experience

Harmsen’s portfolio includes residential, commercial, educational, healthcare, faith-based, municipal, and parks and recreation projects. Its work demonstrates experience supporting both private development and public infrastructure.

Published project examples include Si View Metropolitan Park in North Bend, Pioneer Way Greenroads in Oak Harbor, Cedarhome Baptist Church in Stanwood, Valley General Hospital in Monroe, and Stanwood-Camano Village in Stanwood.

The scope of work varies by project and may include combinations of civil engineering, surveying, landscape architecture, and related development services.

The firm collaborates with architects, contractors, engineers, public agencies, and other specialists to coordinate project requirements. This approach helps clients bring together the site information, technical design, and planning expertise required for development.

Visit the official project portfolio to explore additional examples of the company’s work.

Why Consider Harmsen?

Harmsen combines civil engineering, surveying, construction staking, land use planning, and environmental services within a multidisciplinary practice. Its long history in Washington State and regional office network make it a relevant option for clients seeking land development support in Western Washington.

The firm works with a broad range of project types, from private residences and subdivisions to industrial facilities, schools, healthcare properties, commercial centers, and public spaces.

Its integrated capabilities can help clients coordinate site planning, technical design, survey information, and environmental requirements. Project owners can contact the firm to discuss their objectives, property conditions, anticipated schedule, and required deliverables.

Before engaging the company, clients should confirm the appropriate service scope, professional responsibilities, applicable fees, and current availability for their project.

Contact Harmsen/ASPI

The current official website uses the name Harmsen, LLC and lists offices serving Snohomish, Skagit, and Island County areas.

Vendor Listing Name: Harmsen/ASPI, LLC

Current Website Branding: Harmsen, LLC

Official Website: https://www.harmsenllc.com/

Everett Office: 2822 Colby Avenue, Suite 300, Everett, WA 98201, USA

Everett Phone: +1 360-794-7811

Mount Vernon Office: 603 South First Street, Mount Vernon, WA 98273, USA

Mount Vernon Phone: +1 360-336-9199

Island County Phone: +1 360-675-5973

Services: https://www.harmsenllc.com/

Company History: https://www.harmsenllc.com/about/about-us

Projects: https://www.harmsenllc.com/all-projects

For project inquiries, contact Harmsen directly to confirm current office details, service availability, and the appropriate engineering, surveying, planning, or environmental scope.

Harmsen is a relevant consulting firm for clients seeking civil engineering, land surveying, construction staking, land use planning, wetland services, and sustainable site development support in Western Washington.