STEPHEN SULLIVAN DESIGNS PLLC
Stephen Sullivan Designs PLLC is a Seattle-based boutique residential architecture firm founded in 1994, serving high-net-worth clients with bespoke custom homes, renovations, and historic preservation across the Pacific Northwest, Arizona, and New York.
- Company typePrivate
- Founded1994
- HeadquartersSeattle, United States
- Headcount1–10
- GTM typeB2C
- OfferingServices
What STEPHEN SULLIVAN DESIGNS PLLC does
Stephen Sullivan Designs PLLC is a Seattle-based boutique residential architecture firm founded by Stephen M. Sullivan circa 1994 and operating alongside partner Andrea Ermolli. The firm provides bespoke architectural design services — primarily custom new construction, major renovations, and historic preservation — for high-net-worth residential clients, with a portfolio of roughly 20 featured projects spanning primary residences, vacation and retreat properties, beach houses, and accessory structures. Geographic execution is concentrated in the Pacific Northwest (Washington State locations dominate the case studies) with selective projects extending to Arizona (Anamcara Residence, Scottsdale) and New York (Lightning Tree Farm, Millbrook), and the firm's sole physical office operates out of 1242 East Newton Street, Seattle, under the 'Studio Ermolli' banner.
The firm's technical and creative approach centers on treating architecture as sculptural problem-solving rather than engineering or stylistic application. Methodologies reference Neoclassicism and twentieth-century Modernism alongside Japanese architectural traditions (notably the engawa concept for inside/outside integration), and material selection is informed by Sullivan's earlier training as a ceramic artist in Japan. No proprietary technology platforms, software products, or digital tools beyond a Squarespace-hosted portfolio website are documented; the practice's intellectual property is essentially its portfolio, its design philosophy, and its published monograph 'Architecture as Art: The Work of Stephen M. Sullivan' (ORO Editions, 2021).
Revenue is generated through two streams: project-based professional services fees for architectural design (quote-based, no public tiers, multi-year engagement cadence) and one-time retail revenue from book sales through Pacific Northwest independent bookstores and online channels. The go-to-market motion is sales-led and reputation-driven, built on a portfolio website, regional design awards (AIA, Seattle Design Center, Seattle Homes & Lifestyles, American Wood Council), and the published book serving as a thought-leadership asset. The customer base is a single segment — affluent homeowners seeking artistically crafted, site-specific residences — with no evidence of institutional or commercial clients, recurring revenue, or productized offerings beyond the book.
STEPHEN SULLIVAN DESIGNS PLLC firmographics
Firmographics- Name
- STEPHEN SULLIVAN DESIGNS PLLC
- Legal name
- Stephen Sullivan Designs
- Website
- https://stephensullivandesigns.com
- Company type
- Private
- Founded year
- 1994
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Stephen Sullivan Designs PLLC is a Seattle-based boutique residential architecture firm founded in 1994, serving high-net-worth clients with bespoke custom homes, renovations, and historic preservation across the Pacific Northwest, Arizona, and New York.
- Ownership category
- akta.pro rank
STEPHEN SULLIVAN DESIGNS PLLC industry classification
Industry- Product category
- Residential Architecture Services
- NAICS
- Architectural Services (541310), Architectural Services (54131)
- akta.pro primary industry
- Architectural Design Services (BPAHAKAA)
Keywords
Where STEPHEN SULLIVAN DESIGNS PLLC is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
STEPHEN SULLIVAN DESIGNS PLLC business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales
Revenue model
- Architectural Design Services: Fees for residential architectural design services including new construction, renovations, and historic preservation projects. Projects span primary residences, vacation/retreat properties, and accessory structures. Revenue is project-based, reflecting the bespoke nature of the practice.
- Book Sales: Revenue from sales of 'Architecture as Art: The Work of Stephen M. Sullivan', published by ORO Editions. Available through local bookstores in the Pacific Northwest region and online retailers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Bespoke architectural design services tailored to individual client projects |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
STEPHEN SULLIVAN DESIGNS PLLC product offering
Product offeringCore offering
Stephen Sullivan Designs PLLC is a boutique residential architecture practice providing bespoke architectural design services to high-net-worth homeowners. Projects span primary residences, vacation/retreat properties, accessory structures, renovations, and historic preservation, with emphasis on sculptural form-making, materiality, craft, and integration with landscape. The firm also publishes a career retrospective book, 'Architecture as Art: The Work of Stephen M. Sullivan', through ORO Editions.
Product overview
Stephen Sullivan Designs PLLC is an architectural firm offering residential architectural design services. The firm's portfolio includes diverse project types such as primary residences (Anamcara Residence, Engawa Residence, Hunts Point Residence, Mercer Island Residence, Olympia Bay Residence, Overlake Drive Residence, Miller Bay Residence, Cliff Residence), retreats and cabins (Artist's Studio, Clam Shack, Panorama Rock Cabin, Shark Reef Retreat, Tidewater Cabin, Massacre Bay Beach House), and historic projects (Lightning Tree Farm, Lookout Residence, Merrill Carriage House). The firm also publishes a career retrospective book titled 'Architecture as Art: The Work of Stephen M. Sullivan.' The firm operates collaboratively with clients, approaching design as both creative collaboration and sculptural problem-solving, with projects spanning locations in Washington State, Arizona, and New York.
Differentiator
Problem solved
Functional benefit
Products and services
- Residential Architectural Design Services
- Architecture as Art: The Work of Stephen M. Sullivan
Companies that use STEPHEN SULLIVAN DESIGNS PLLC
Customer profileNamed customers17 records
Segments1 record
Ideal customer profiles1 record
STEPHEN SULLIVAN DESIGNS PLLC technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
STEPHEN SULLIVAN DESIGNS PLLC partnerships and signals
Strategic signalPartnerships
19 partnerships are on record, tiered minor and core.
- Schuchart-DowminorConstruction contractor for the Massacre Bay Beach House project (2010). Schuchart-Dow executed the renovation of the historic beachside cabin on Orcas Island.
- Krekow Jennings Inc.minorConstruction contractor for the Hunts Point Residence (2011) and Merrill Carriage House projects. Executed high-end residential construction.
- Holly McKinleyminorInterior designer collaborating on the Hunts Point Residence project (2011).
- Susan YoungminorInterior designer for Overlake Drive Residence project (2002) in Medina, WA.
- Kemper IversenminorLandscape architect for Overlake Drive Residence project (2002).
- Mark HamiltonminorContractor for Olympia Bay Residence (2005).
- David GoularteminorInterior designer for Olympia Bay Residence (2005).
- GKO ConstructionminorContractor for Anamcara Residence in Scottsdale, AZ (2017). Executed desert residence with passive solar design and courtyard integration.
- Doug RasarminorInterior designer for Anamcara Residence (2017) in the Sonoran Desert.
- Donna WintersminorLandscape designer for Anamcara Residence (2017), integrating the desert home with the Sonoran landscape.
- Richard HaagminorLandscape designer for Merrill Carriage House project, contributing to the Japanese-influenced design integration.
- David EastonminorInterior designer for Lightning Tree Farm project in Millbrook, NY (1989).
- Edwin ByeminorLandscape architect for Lightning Tree Farm project (1989).
- ORO EditionscorePublisher of 'Architecture as Art: The Work of Stephen M. Sullivan', the firm's career retrospective book. Strategic partnership establishing the firm's thought leadership positioning in architecture as art.
- Peter Miller BooksminorIndependent Seattle bookstore carrying the firm's published book.
- Elliott Bay Book CompanyminorIndependent Seattle bookstore carrying the firm's published book.
- Third Place BooksminorPacific Northwest independent bookstore carrying the firm's published book at multiple locations.
- Benjamin BenschneiderminorPhotographer credited for Massacre Bay Beach House project documentation.
- W. G. HookminorWatercolor artist contributing artwork to Overlake Drive Residence project.
Scale indicators2 records
Recent moves4 records
Expansion highlights4 records
STEPHEN SULLIVAN DESIGNS PLLC competitors and assessment
Company assessmentRegional players
- Mithun: Seattle-headquartered architecture firm with design excellence in residential, urban, and institutional projects. Comparable as a Pacific Northwest architecture peer with award-winning design credentials, though operating at significantly larger scale.
- Olson Lewis + Architects: Seattle-based residential architecture firm with similar boutique scale and bespoke approach. Comparable as a Pacific Northwest peer serving high-end residential clients, though with a different stylistic focus.
Direct peers
- Olson Kundig: Seattle-based architecture firm specializing in bespoke high-end residential design with a craft-driven, art-inflected philosophy. Highly comparable as a Pacific Northwest boutique practice serving wealthy residential clients with artisanal, materially focused architecture.
- Peter Pennoyer Architects: New York architecture firm specializing in classical and historically informed residential and institutional design. Comparable as a boutique firm whose work draws on historical architectural traditions to produce bespoke residences for affluent clients.
- Ike Kligerman Barkley: New York and San Francisco architecture firm known for high-end residential work with historically informed, art-influenced aesthetics. Comparable as a small boutique practice serving wealthy clients seeking architecturally distinctive, personalized homes.
- Studio Sofield: New York-based design studio with a strong residential practice led by a principal with a distinctive signature aesthetic. Comparable as a small, principal-led firm serving elite residential clients with highly personalized, art-driven design.
- Aidlin Darling Design: California-based architecture and design firm producing award-winning bespoke residential and select commercial work. Comparable as a small, craft-focused practice that integrates landscape, interior, and architectural design with artistic sensibility for affluent clients.
- Marmol Radziner: Los Angeles architecture and design-build firm specializing in high-end custom residential projects with integrated landscape and interior design. Comparable as a luxury residential boutique delivering site-specific, materially rich homes for high-net-worth clients.
Broad incumbents
- Robert A.M. Stern Architects: Large New York-based architecture firm with a substantial residential practice drawing on classical and traditional design vocabularies. Comparable as a firm that translates historical architectural references into bespoke luxury residential work, though at much larger scale and broader scope.
Emerging players
- Heathcote Holdings: Boutique architecture and design practice serving high-end residential clients with a craft-driven, integrated design approach. Comparable as a small bespoke residential firm operating in a similar luxury niche.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat2 records
Key risks6 records
Key highlights7 records
Customer concentration
STEPHEN SULLIVAN DESIGNS PLLC social profiles
Digital presenceSTEPHEN SULLIVAN DESIGNS PLLC financial estimates
Financial estimateRevenue estimate
Valuation estimate
STEPHEN SULLIVAN DESIGNS PLLC leadership team
Management profileNumber of profiles
Profiles2 records
STEPHEN SULLIVAN DESIGNS PLLC funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
STEPHEN SULLIVAN DESIGNS PLLC 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 STEPHEN SULLIVAN DESIGNS PLLC
What does STEPHEN SULLIVAN DESIGNS PLLC do?
Stephen Sullivan Designs PLLC is a boutique residential architecture practice providing bespoke architectural design services to high-net-worth homeowners. Projects span primary residences, vacation/retreat properties, accessory structures, renovations, and historic preservation, with emphasis on sculptural form-making, materiality, craft, and integration with landscape. The firm also publishes a career retrospective book, 'Architecture as Art: The Work of Stephen M. Sullivan', through ORO Editions.
Is STEPHEN SULLIVAN DESIGNS PLLC a public or private company?
STEPHEN SULLIVAN DESIGNS PLLC is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was STEPHEN SULLIVAN DESIGNS PLLC founded?
STEPHEN SULLIVAN DESIGNS PLLC was founded in 1994. It employs 1 to 10 people.
Where is STEPHEN SULLIVAN DESIGNS PLLC based?
STEPHEN SULLIVAN DESIGNS PLLC is headquartered in Seattle, United States, in the North America region.
How does STEPHEN SULLIVAN DESIGNS PLLC make money?
Two revenue lines are on record. Architectural Design Services are the primary driver. The others are book Sales.
Who are STEPHEN SULLIVAN DESIGNS PLLC's main competitors?
Regional players on record are Mithun and Olson Lewis + Architects. Direct peers are Olson Kundig, Peter Pennoyer Architects, Ike Kligerman Barkley, Studio Sofield, Aidlin Darling Design and Marmol Radziner. Robert A.M. Stern Architects is listed as a broad incumbent. Heathcote Holdings is listed as an emerging player.
Does STEPHEN SULLIVAN DESIGNS PLLC have an API?
No public API is recorded for STEPHEN SULLIVAN DESIGNS PLLC.
What industry is STEPHEN SULLIVAN DESIGNS PLLC in?
STEPHEN SULLIVAN DESIGNS PLLC's product category is Residential Architecture Services. Its primary akta.pro industry code is BPAHAKAA, Architectural Design Services. Its NAICS code is 541310.