H2D Architecture + Design

Business Details

20 Years

experience

Your Trusted Architects in Edmonds, WA

Founded in 2006 by Heidi Helgeson, H2D Architecture + Design is a woman-owned and operated full-service architecture and interior design firm licensed in Washington and Oregon. Our mission centers on collaborative design, translating client visions into meticulously crafted spaces through tailored processes that prioritize architectural detail, budget feasibility, and sustainable materials. With expertise spanning custom homes, remodels, additions, multi-family dwellings, and commercial projects, we embrace diverse scales, styles, and challenging sites.

Our team utilizes 3D modeling, hand-sketches, and technical plans to deliver high-performance designs, holding certifications including Passive House Institute accreditation and Washington State WBE status. We maintain professional affiliations with AIA Seattle, NCARB, and sustainability-focused organizations, reflecting our commitment to innovation and industry leadership.

Services

Custom New Construction Remodels & Additions Interior Design Commercial Design Sustainable Design Bathroom Upgrades Kitchen Renovations 2nd Story Additions ADU/DADU Design

Details

Year established: 2006

Highlights and features

17+ years of experience in residential and commercial design since 2006
Woman-owned firm with Washington State WBE certification
Certified Passive House designers for energy-efficient architecture
Tailored design processes for unique project requirements
Collaborative approach integrating 3D modeling and technical precision

Associations and certifications

Washington State Office of Minority and Women's Business Enterprises (WBE)
Passive House Institute Certified Passive House Designer
American Institute of Architects (AIA)
NCARB

What people say

Responsive, practical yet creative Seamless collaboration with GC Challenging structural changes handled Timely, cordial communication Spot-on with client vision

Website

Update Listing

Services

Custom New Construction

H2D designs custom single-family homes across architectural styles, from traditional to contemporary. Our full-service approach integrates site analysis, 3D modeling, and sustainable materials to create high-performance spaces tailored to client needs. Projects range from compact urban infill to waterfront estates, emphasizing energy efficiency and timeless aesthetics.

Remodels & Additions

We specialize in transforming existing spaces through whole-house renovations and structural additions. Our process preserves architectural integrity while modernizing functionality, incorporating universal design principles and energy-efficient systems. Services include house lifts, multi-story expansions, and aging-in-place adaptations for long-term usability.

Sustainable Design

Our high-performance designs achieve superior energy efficiency and indoor air quality through Passive House principles and sustainable materials. Certified Passive House designers guide clients in selecting eco-friendly systems that reduce environmental impact while maintaining aesthetic excellence and long-term cost savings.

Interior Design

H2D's interior design services create cohesive, personalized spaces that complement architectural elements. We offer finish selection, 3D renderings, furniture layouts, and on-site styling, balancing client preferences with functional requirements. Our expertise spans color coordination, lighting design, and universal accessibility solutions.

Commercial Design

We design innovative commercial environments including retail spaces, restaurants, salons, and civic buildings. Our approach focuses on brand alignment, spatial efficiency, and code compliance, creating functional spaces that enhance business operations while maintaining architectural integrity and sustainability standards.

People

Heidi Helgeson

Owner & Principal Architect

Licensed architect in WA/OR with Passive House certification and 20+ years of experience. Holds degrees from University of Washington (M.Arch) and Saint Olaf College. AIA member specializing in sustainable residential and commercial design.

Lisa Montalvo

Architectural & Interior Designer

Bachelor of Architecture from Penn State with 15+ years in residential and commercial design. Specializes in bold color integration and adaptive reuse projects. Certified interior designer with expertise in client-focused spatial solutions.

Sarah Thompson

Project Architect

Licensed in WA/CA with experience in custom residential and healthcare design. SUNY graduate emphasizing trusting client relationships. Skilled in problem-solving for complex architectural challenges while maintaining design integrity.

Lauren Groth

Interior Designer

Seattle Pacific University graduate focusing on midcentury modern design and functional spaces. Translates client needs into practical solutions, prioritizing usability followed by aesthetic appeal in custom residential and commercial interiors.

Cristy Weller

Architectural Designer

Washington State University graduate with multi-family and custom home experience. Emphasizes personal client connections in residential projects. Skilled in balancing design creativity with technical requirements for successful project delivery.

Questions

What architectural services does H2D offer?

We provide full-service architecture for custom homes, remodels, additions, ADUs/DADUs, and commercial projects, including design, permitting, and construction documentation.

Do you work outside the Seattle area?

While based in Edmonds, WA, we serve the greater Pacific Northwest and accept select projects beyond the region based on project scope.

Are you certified in sustainable design?

Yes, we hold Passive House Institute certification and incorporate sustainable materials and energy-efficient systems into all project types.

How does your design process work?

We begin with client visioning sessions, followed by schematic design, 3D modeling, and technical documentation tailored to each project's unique requirements.

Can you handle complex renovation projects?

Our team specializes in challenging remodels, including structural modifications, house lifts, and integrating modern designs with historic structures.

How do I schedule a consultation?

Contact us via our website or phone to discuss your project needs and arrange an initial appointment with our design team.

Reviews (5)

Write a Review

Kristen Toshner

Jul 06, 2019 Report

Cannot say enough about this firm. Our project wasn't an easy one and Heidi and team really helped us translate our dream home into feasible plans. Our project is now finished and I am so happy to say this is our dream forever home. Thank you for the impeccable listening, smooth process and innovation H2D!

Braxten T.

Feb 16, 2017 Report

I called looking for specific plans and found out I'm just outside their scope. She referred me to the proper contractor right away and was extremely helpful.

Jeff T.

Jan 04, 2017 Report

We wish we had chosen a different architect. Initially, H2D seemed competent and pleasant during the first part of our home remodel. However, our overall experience with them was unsatisfactory. Admittedly, our remodel was problematic and revealed challenges we hadn't anticipated. However, common oversights and miscalculations by H2D resulted in generated revenue for H2D and added expense and time to our remodel. At the beginning of the project, H2D called for a meeting so we could discuss key design aspects of a particular room. The plans that H2D created after that meeting failed to

Paul Stoltenberg

Dec 03, 2016 Report

I have had the interesting experience of working with H2D Architecture as a professional on shared projects and as a client of theirs for my own home. They do a nice job of communicating, are thorough in their plan preparation and understanding of the permit process, and are very responsive. I also find their fee schedule reasonable and manageable, making professional services accessible for other than the "rich and famous." They will help navigate the system for you so you can enjoy the process of dreaming, creating, and building.

Kurt Harjo

Sep 21, 2016 Report

As a general contractor we've worked with Heidi and her team at H2D on 8 or 10 projects over the past 6+ years. I'm always impressed with Heidi's ability to tailor her services to the needs of the client. Whether its highly detailed aesthetics, complicated structures, or a utilitarian new space plan for a kitchen or basement Heidi and the team at H2D bring practical straight forward Architecture to their clients. With confidence and enthusiasm I can recommend H2D to my clients knowing they will be dealt with honestly and be provided with great value and honest Architecture.