What Bos|ua does

BOS|UA (operating as BOS - Urban Architecture) is a privately held, principal-led architecture and urban design firm based in Cambridge, Massachusetts, founded by Paxton Sheldahl and Silvia Illia-Sheldahl. The firm delivers full-service design across residential, commercial, cultural, educational, mixed-use, and exhibition project types, including notable commissions such as the Buffalo AKG Art Museum expansion (with OMA NY), PRX Headquarters, Gilman Square Mixed-Use, 88 Wareham Housing, and the SolBe early childhood education centers. Its competitive positioning is built on the principals' prior experience at OMA NY, Utile, Merge Architects, and Sasaki, and a portfolio recognized by the Boston Society of Architects (Small Firms Design Awards in 2017 and 2022) and ArchDaily.

The firm operates as a custom professional services practice: revenue is generated through project-based fees negotiated per engagement, with no standard pricing tiers and no disclosed public pricing. Customer engagement is sales-led and direct, with both principals leading client relationships, business development, and design delivery. Projects are acquired through outreach, RFP responses, and portfolio-driven referrals, with multi-year contract cadences on larger developments. The firm maintains a network of recurring collaborators (e.g., Bill Bancroft Furniture Design, Rukamathu.Smith, Runcible Studios, Brian Healy Architects) and engineering consultants (Acentech, Lam Partners, AKF) across project types.

Operationally, BOS|UA is a micro practice with 1-10 employees, supported by a broader ecosystem of past and current collaborators listed on the firm's website. The technology stack is industry-standard architecture and design software; there is no proprietary platform, no AI/ML capability, and no API or SDK offering. The firm additionally teaches into the academic pipeline through guest lectures and studio reviews at Harvard GSD and Northeastern, an under-the-radar but credible channel for talent and reputational sourcing. The combination of strong principal pedigree, award-recognized cultural and residential work, and a national project footprint (Boston, Somerville, Buffalo, Chicago, Los Angeles, Miami Beach) positions the firm as a high-credibility boutique rather than a scale-oriented platform.

Name

Bos|ua

Legal name

BOS|UA

Website

https://bos-ua.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

1–10 employees

Short description

BOS|UA is a small, principal-led architecture and urban design firm in Cambridge, MA, delivering full-service design for residential, commercial, cultural, educational, and mixed-use projects across multiple US cities, with the principals' prior experience at OMA NY, Utile, Merge Architects, and Sasaki as its core differentiator.

Ownership category

akta.pro rank

Headquarters

HQ city

East Boston

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Architecture and Design Services: Project-based professional fees for architecture, urban design, and interior design services. Revenue is earned through design contracts with residential, commercial, cultural, and institutional clients. Projects range from small residential renovations to large-scale cultural and mixed-use developments.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

BOS|UA is an award-winning, full-service Architecture and Urban Design firm offering architectural design, urban planning, interior design, and design vision consulting for residential, commercial, cultural, educational, and mixed-use projects. The firm collaborates with clients from project inception through completion, delivering services ranging from small residential renovations to large-scale cultural and mixed-use developments.

Product overview

BOS|UA is an award-winning, full-service Architecture and Urban Design firm that operates as a single unified practice rather than a platform-plus-modules structure. Their portfolio spans architectural design services across residential, commercial, mixed-use, cultural, educational, exhibition, and urban design categories. The firm collaborates with clients from project inception through completion, offering services including architectural design, interior design, urban planning, vision consulting, and design-build capabilities. Notable project types include early childhood education facilities (SolBe), museum expansions (Albright Knox), residential renovations (JK Residence, IV Residence), commercial interiors (PRX Headquarters), and large-scale urban developments (Gilman Square Mixed-Use). The firm emphasizes design intelligence and collaboration to create environments promoting well-being, interaction, and connection.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• BSA Small Firms/Small Projects Design Award for Health Yoga Life (2017)
• +1 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Nine partnerships are on record, tiered core and regular.

• OMA NYcoreStrategic or Co-development Partner · 1 January 2025Design Team Consultant for Albright Knox Museum Expansion (now Buffalo AKG Art Museum). Worked with OMA NY on the Jeffrey E. Gundlach Building. Principal Paxton Sheldahl previously worked at OMA NY, and the firm maintains this collaborative relationship for major cultural projects.
• Brian Healy Architects (BHA)coreStrategic or Co-development Partner · 1 January 2024Collaborated on 88 Wareham multi-family housing project in Boston's SoWa District. BHA served as lead architect with BOS|UA as design collaborator. Project included 28 residential units with automated parking system.
• Runcible StudioscoreStrategic or Co-development Partner · 1 January 2018Joint venture partner with BOS|UA for Gilman Square Mixed-Use development project. Owner Marilyn Moedinger initiated the partnership to pursue progressive local development projects in Somerville, MA. Runcible Studios contributed to collaborative design process with community engagement.
• Bill Bancroft Furniture DesignregularStrategic or Co-development PartnerOngoing collaborator on multiple projects including PRX HQ, Sushi Kappo, Health Yoga Life, BOS HQ, and JK Residence. Provided custom millwork and furniture design across various commercial and residential projects.
• Rukamathu.SmithregularStrategic or Co-development PartnerCollaborated with BOS|UA on PRX Headquarters and Sushi Kappo projects. Contributed to design vision and execution for these commercial interiors.
• PRXcoreStrategic or Co-development PartnerLong-standing client relationship with PRX (Public Radio Exchange). Completed PRX Podcast Garage Vision Report (2018), PRX Headquarters renovation (2018), and ongoing collaboration. PRX serves public media organizations.
• Emerald Necklace ConservancycoreStrategic or Co-development PartnerClient for FogxFLO Shattuck Visitor Center exhibition design. Project celebrates Frederick Law Olmsted parks and Fujiko Nakaya fog sculptures throughout Boston's Emerald Necklace.
• Bill Bancroft & BOS|UAregularStrategic or Co-development PartnerCo-designed cabinetry system for SolBe Skyhouse project. Bill Bancroft collaborated on custom storage solutions and furniture design.
• Cooper RobertsoncoreImplementation/ SI/ Consulting PartnerArchitect of Record for Albright Knox Museum Expansion project, working with OMA NY and BOS|UA as design consultant.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Sasaki Associates: Large Boston-based planning, design, and architecture firm where Silvia Illia-Sheldahl previously worked. Overlapping urban design and architecture focus but at materially greater scale and breadth.
• OMA NY: Global architecture firm where Principal Paxton Sheldahl previously worked and a current collaborator on the Buffalo AKG Museum Expansion. Much larger, global practice serving cultural and institutional clients at a different scale.
• Cooper Robertson: Large, established architecture and planning firm serving as architect of record on the Buffalo AKG Museum Expansion with BOS|UA. Comparable cultural and institutional work but at a significantly larger scale.

Direct peers

• NADAAA: Boston-based design practice led by Nader Tehrani with comparable award recognition, small-team structure, and engagement in research-driven architecture, residential, and institutional work.
• Anmahian Winton Architects: Small, award-winning architecture firm with a Boston/Cambridge presence, comparable firm size, and a focus on residential, cultural, and academic commissions.
• Merge Architects: Boston architecture firm (former employer of Silvia Illia-Sheldahl) with a similar small-firm structure, design-led practice, and portfolio spanning residential, commercial, and institutional projects in the Northeast.
• Utile: Boston-based architecture and urban design firm where Principal Silvia Illia-Sheldahl previously worked. Comparable in size, focus on residential and urban design, and reputation in the Boston development community.
• Touloukian Touloukian Inc. Boston-based small architecture practice with a comparable boutique structure, focus on residential and urban infill projects, and design-led Northeast market positioning.
• Leers Weinzapfel Associates: Award-winning Boston architecture firm with a similar small-practice structure and recognized portfolio spanning cultural, educational, and civic projects in the Northeast.
• Brian Healy Architects: Boston architecture firm and BOS|UA collaborator on the 88 Wareham Housing project. Comparable scale, residential and mixed-use focus, and Boston market position.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks5 records

Key highlights6 records

Customer concentration

• Instagraminstagram.com/bosurbanarchitecture

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Bos|ua