CAST architecture
CAST architecture is a Seattle-based architectural firm founded in 1999 that designs modern, sustainable residential, community, educational, and middle housing projects across the Pacific Northwest, specializing in green building certifications, pre-approved DADU plans, and adaptive reuse.
- Company typePrivate
- Founded1999
- HeadquartersSeattle, United States
- Headcount11–50
- GTM typeB2C
- OfferingServices
What CAST architecture does
CAST architecture is a Seattle-based architectural firm founded in 1999 that provides modern, sustainable design services for residential, commercial, community, and educational projects across the Pacific Northwest and select out-of-state markets including Idaho, California, Colorado, and Utah. The firm specializes in green building practices, with deep expertise in Built Green and LEED certification pathways, off-grid and Firewise design strategies, green stormwater management, and adaptive reuse to reduce embodied carbon. Its core product offerings include custom single-family homes, pre-approved City of Seattle DADU (Detached Accessory Dwelling Unit) plans, middle housing developments such as six-plexes and townhomes, community facilities, and educational/early learning centers.
The firm's technology foundation consists of proprietary pre-approved municipal DADU plans (Cedar Cottage, Beacon Hill Cedar Cottage, Woodland Cottage) that streamline permitting, plus specialized design capabilities including Firewise strategies for fire-prone rural properties, off-grid standalone power systems with solar integration, and bioretention stormwater management. Notable named products include the award-winning Cedar Cottage (467 SF), Beacon Hill Cedar Cottage (707 SF), Woodland Cottage (637 SF in Bellingham), Spokane Six six-plex with Passive House principles, and Dexter Townhomes near Lake Union. The firm's portfolio includes projects achieving 4-Star Built Green and LEED certifications.
CAST operates on a project-based professional services revenue model with quote-based fees tied to scope, complexity, and square footage. The go-to-market approach is sales-led and direct, serving four primary customer segments: residential homeowners (primary), community organizations and tribal governments, educational institutions, and developers/investors building middle housing. Distribution is through direct client engagement across Washington State and extended Pacific Northwest/Mountain West geographies, supported by project portfolio marketing, earned media in publications such as Dwell and Seattle Times, AIA and Historic Seattle award recognition, and a referral network of contractors, real estate professionals, and past clients. The firm employs 11-50 people at its Seattle headquarters at 115 North 36th Street and is independently owned by co-founders Matt Hutchins and Stefan Hampden.
CAST architecture firmographics
Firmographics- Name
- CAST architecture
- Legal name
- CAST architecture
- Website
- https://castarchitecture.com
- Company type
- Private
- Founded year
- 1999
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- CAST architecture is a Seattle-based architectural firm founded in 1999 that designs modern, sustainable residential, community, educational, and middle housing projects across the Pacific Northwest, specializing in green building certifications, pre-approved DADU plans, and adaptive reuse.
- Ownership category
- akta.pro rank
CAST architecture industry classification
Industry- Product category
- Architectural Services
- NAICS
- Architectural Services (54131)
- SIC
- General Bldg Contractors - Residential Bldgs (1520)
- akta.pro primary industry
- Architectural Design Services (BPAHAKAA)
- akta.pro secondary industries
- Residential Design-Build & Renovation-Integrated Builders (IMAFABAE), Whole-Home Interior Renovation (Non-Structural) (HSAPAEAC), Custom Home Building (IMAFABAC)
Keywords
Where CAST architecture is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
CAST architecture business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D
Revenue model
- Architectural Design Services: Project-based fees for architectural design services including residential, commercial, community, and educational projects. Revenue is generated through design fees, project management, and construction administration services.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels4 records
CAST architecture product offering
Product offeringCore offering
CAST architecture is a Seattle-based architectural firm that designs modern, sustainable buildings including single-family homes, accessory dwelling units (DADUs/AADUs) with pre-approved plans, middle housing such as six-plexes and townhomes, community facilities, and educational buildings. The firm sells project-based design services—concept, documentation, and construction administration—across the Pacific Northwest, with specialization in green building certifications (Built Green, LEED), firewise design, off-grid systems, and embodied carbon reduction through renovation.
Product overview
CAST architecture is a Seattle-based architecture firm offering residential architecture design services, including single-family homes, renovations, and additions; backyard cottage/DADU design with pre-approved plans; community and commercial architecture; green building and sustainable design; and middle housing design. The firm specializes in modern architecture with a focus on sustainability, offering services across Washington State and select out-of-state projects. Their portfolio includes named DADU models (Cedar Cottage, Beacon Hill Cedar Cottage, Woodland Cottage) and the Spokane Six multifamily project.
Differentiator
Problem solved
Functional benefit
Products and services
- Residential Architecture Design
Quantifiable outcome
- 4-Star Built Green and LEED certifications achieved on multiple projects
- +2 more outcomes
Companies that use CAST architecture
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles3 records
CAST architecture technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
CAST architecture partnerships and signals
Strategic signalScale indicators2 records
Recent moves6 records
Expansion highlights5 records
CAST architecture competitors and assessment
Company assessmentDirect peers
- Olson Kundig: Seattle-based architecture firm known for modern, sustainable residential and commercial design with strong Pacific Northwest identity. Highly comparable to CAST in geography, modern aesthetic, and sustainability orientation, though operating at significantly larger scale.
- Lake|Flato Architects: Texas-based firm nationally recognized for sustainable modern residential and community architecture. Comparable to CAST in sustainability-led design philosophy, modern residential aesthetic, and community/civic project portfolio.
- SkB Architects: Seattle-based architecture firm focused on sustainable, modern residential and mixed-use design. Directly comparable to CAST in design philosophy, residential emphasis, and Pacific Northwest regional base.
- Miller Hull Partnership: Seattle architecture firm with strong reputation in sustainable, civic, and residential design. Comparable to CAST for Pacific Northwest regional focus, integrated sustainability practice, and involvement in community/institutional projects.
- Bohlin Cywinski Jackson: Pacific Northwest-rooted architecture firm with offices in Seattle and a national reputation for modern, sustainable design. Comparable to CAST in design sensibility, regional base, and civic/residential portfolio mix, though at larger scale.
- DiLoreto Architecture + Interiors: Seattle custom home and renovation architecture practice. Closely comparable to CAST's residential renovation, custom home, and ADU focus, serving similar affluent homeowner client base in greater Seattle.
- Mithun: Seattle-based integrated design firm practicing architecture, urban design, and interior design with deep sustainability expertise. Comparable to CAST in regional base and sustainability focus, with overlapping work in community, education, and multifamily housing.
- SHED Architecture & Design: Seattle firm specializing in modern residential architecture, ADUs, and accessory structures. Highly comparable niche overlap with CAST's DADU and backyard cottage practice, serving similar homeowner clients in the Seattle market.
- Heliotrope Architects: Seattle firm with focus on modern, sustainable residential design and ADU work. Strong overlap with CAST on client type, geography, and emphasis on green building practices in the Pacific Northwest.
Regional players
- Rule Joy Trammell + Rubio: Southeast US (Atlanta-based) architecture firm with sustainability and residential focus. Adjacent peer for sustainability-oriented residential and community design, though serving a different geography than CAST.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
CAST architecture social profiles
Digital presenceCAST architecture compliance and trust
Trust signalCompliance8 records
CAST architecture financial estimates
Financial estimateRevenue estimate
Valuation estimate
CAST architecture leadership team
Management profileNumber of profiles
Profiles1 record
CAST architecture funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CAST architecture M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CAST architecture
What does CAST architecture do?
CAST architecture is a Seattle-based architectural firm that designs modern, sustainable buildings including single-family homes, accessory dwelling units (DADUs/AADUs) with pre-approved plans, middle housing such as six-plexes and townhomes, community facilities, and educational buildings. The firm sells project-based design services—concept, documentation, and construction administration—across the Pacific Northwest, with specialization in green building certifications (Built Green, LEED), firewise design, off-grid systems, and embodied carbon reduction through renovation.
Is CAST architecture a public or private company?
CAST architecture is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was CAST architecture founded?
CAST architecture was founded in 1999. It employs 11 to 50 people.
Where is CAST architecture based?
CAST architecture is headquartered in Seattle, United States, in the North America region.
How does CAST architecture make money?
One revenue line is on record: architectural Design Services.
Who are CAST architecture's main competitors?
Direct peers on record are Olson Kundig, Lake|Flato Architects, SkB Architects, Miller Hull Partnership, Bohlin Cywinski Jackson, DiLoreto Architecture + Interiors, Mithun, SHED Architecture & Design and Heliotrope Architects. Rule Joy Trammell + Rubio is listed as a regional player.
Does CAST architecture have an API?
No public API is recorded for CAST architecture.
What industry is CAST architecture in?
CAST architecture's product category is Architectural Services. Its primary akta.pro industry code is BPAHAKAA, Architectural Design Services, with a secondary code of IMAFABAE, Residential Design-Build & Renovation-Integrated Builders. Its NAICS code is 54131 and its SIC code is 1520.