Business Details
20 Years
experience
Your Trusted Seattle Architect for Custom Design Solutions
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 that balance aesthetics, functionality, and sustainability. With expertise spanning custom homes, remodels, additions, commercial projects, and interior design, we prioritize architectural detail, budget feasibility, and high-performance materials. Our team brings decades of combined experience across diverse project typesfrom small renovations to complex new constructionswhile maintaining a personalized approach to each client's unique needs. Certified as a Women Business Enterprise (WBE) by the Washington State Office of Minority and Womens Business Enterprises, we integrate 3D modeling, hand-sketching, and technical precision to deliver tailored solutions.Our commitment to sustainable design is reflected in our work with Passive House standards and certifications, ensuring energy efficiency and long-term value. The firms principals hold registrations in multiple states and affiliations with professional organizations like the American Institute of Architects, while our teams diverse backgroundsfrom residential to healthcare projectsenrich our creative process. Client testimonials consistently highlight our responsiveness, problem-solving skills, and ability to execute challenging structural transformations with professionalism.
Services
Custom Homes
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
- Founded in 2006 with licensed architects in Washington and Oregon
- Specialize in high-performance sustainable design and Passive House standards
- Personalized approach for each project's unique requirements
- Certified Women Business Enterprise (WBE) with industry affiliations
- Proven track record of complex structural transformations and client satisfaction
Associations and certifications
- Registered Architect in Washington
- Registered Architect in Oregon
- Certified Passive House Designer
- Women Business Enterprise (WBE)
What people say
Responsive and creative team
Seamless collaboration with GC
Highly recommend for quality work
Professional and detailed approach
Thrilled with structural changes
Services
Custom Homes
H2D designs custom homes from traditional to contemporary styles, focusing on architectural detail and high-performance materials. Our full-service approach includes 3D modeling, technical plans, and material coordination to create spaces tailored to client needs. Projects range from compact homes to waterfront estates across the Pacific Northwest.
Remodels & Additions
We specialize in whole-house renovations, single-story additions, and complex structural changes. Our process integrates new designs with existing structures while prioritizing universal design, aging-in-place features, and energy efficiency. Recent projects include historic home rehabilitations and modern midcentury remodels in the Seattle area.
Interior Design
Our interior design services combine aesthetics and functionality through finish selections, 3D renderings, and furniture planning. The process includes programming, concept development, and detailed documentation to ensure cohesive, personalized spaces that complement architectural elements in both residential and commercial settings.
Commercial Design
H2D creates innovative commercial spaces including salons, restaurants, retail, and civic buildings. Our team collaborates with clients to develop functional, visually striking environments that align with business goals while meeting technical and regulatory requirements for tenant improvements and new constructions.
Sustainable Design
We incorporate sustainable materials and energy-efficient systems to achieve high-performance buildings. Our expertise includes Passive House standards, healthy homes certifications, and eco-friendly construction methods that reduce environmental impact while enhancing comfort and long-term value for residential and commercial projects.
People
Heidi Helgeson
Owner & Principal Architect
Heidi founded H2D in 2006 after gaining experience at architecture firms on diverse projects. A Registered Architect in Washington and Oregon, she holds a Master of Architecture from the University of Washington and is a Certified Passive House Designer.
Lisa Montalvo
Architectural & Interior Designer
Lisa brings expertise in commercial and residential design, with a focus on incorporating bold natural colors. She holds a Bachelor of Architecture from Penn State and an Interior Design degree from The Art Institute of Seattle.
Sarah Thompson
Project Architect
Sarah specializes in custom single-family residential design, with licenses in Washington and California. She has worked on projects from Southern California to the Pacific Northwest, emphasizing client relationships and creative problem-solving.
Lauren Groth
Interior Designer
Lauren focuses on custom new construction and remodels, blending functionality with beauty. She holds a Bachelor of Arts in Interior Design from Seattle Pacific University and specializes in midcentury modern styles.
Cristy Weller
Architectural Designer
Cristy has extensive experience in residential and multi-family projects. She graduated from Washington State University with a Bachelor of Architecture and prioritizes personal connections in custom residential design.
Questions
What type of projects require a permit?
Permits are generally required for new construction, additions, and most interior remodels. The type varies by project scope and jurisdiction.
What kind of projects does H2D take on?
Residential new construction, additions, interior remodels, outdoor living spaces, DADUs, and small commercial projects.
How long does the design process take?
Timeline varies by project size and permitting wait times. Contact us for specific estimates.
What are the first steps to start a project?
Email or call with project basics. We'll discuss parameters, outline a scope, and send a proposal within days.
How does H2D work with contractors?
We collaborate with structural engineers and builders, providing plans for estimates and construction. We can recommend trusted contractors.
Do you provide interior design services?
Yes, our in-house designer offers consultations, colorboards, 3D renderings, and furniture planning to complete your home's look.
