What Assembly OSM does

Assembly OSM is a New York-based private modular construction company founded in 2019 that designs, engineers, and delivers high-rise residential and multifamily buildings using a distributed, post-modular construction model. Its core technology is a volumetric modular building system in which one module yields a studio, two yield a one-bedroom, and three yield a two-bedroom unit, with module sizes customized per project to enable non-orthogonal, site-adaptive buildings suited to dense urban contexts. The platform combines a proprietary structural chassis, mechanical systems, and high-performance Passive House facade designs with a distributed supply chain of expert fabricators across the United States and globally, deliberately avoiding the vertical integration that contributed to the failure of competitor Katerra. Production takes place at a manufacturing facility in Harrison, NJ, where modules are assembled offsite before being stacked on-site—147 St. Felix in Fort Greene, Brooklyn was stacked in one day, and the company claims buildings can be delivered in roughly 60% of conventional construction time at market-competitive cost, with up to 30-35% lower embodied carbon and 55-70% greater operational energy efficiency than conventional structures.

The company generates revenue primarily through project-based construction contracts with real estate developers and builders, targeting enterprise B2B customers in multifamily housing, affordable housing, student housing, hospitality, education, and accessory dwelling units. Its go-to-market is enterprise direct sales, with prospects engaging via a 'Build With Us' contact form on the company website. Pricing is quote-driven and not publicly disclosed. To date, three reference projects are publicly documented: Prototype Alpha (an internal one-bedroom proof of concept), 147 St. Felix (a 3-story modular Passive House residential building in Brooklyn), and 247 E 117th Street (a 15-story, 51-unit fully volumetric Passive House-ready affordable housing development in East Harlem, with anticipated completion in the second half of 2025). The company has raised $62 million in venture funding, most notably a $38 million Series A in July 2022 co-led by Fifth Wall's Climate Technology fund and Bessemer Venture Partners, and has accumulated sustainability credentials through early-adopter status with PHIUS, IWBI's WELL for Residential program, and the AIA 2030 Commitment, plus recognition including the NYSERDA Buildings of Excellence Award in 2024.

Assembly OSM's strategic positioning rests on a non-vertically-integrated, distributed-supplier model that contrasts with failed vertically-integrated modular entrants, combined with deep sustainability credentials aimed at the affordable and sustainable urban housing market. The model is still in early commercial validation, with headcount in the 11-50 range, a thin active project pipeline, and a flagship 51-unit project not yet complete as of the available data.

Name

Assembly OSM

Legal name

Assembly OSM

Website

https://assemblyosm.com

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

11–50 employees

Short description

Assembly OSM is a New York-based modular construction company founded in 2019 that designs, engineers, and delivers volumetric high-rise residential and multifamily buildings for real estate developers using a distributed supply chain of expert fabricators and Passive House design, targeting affordable and sustainable urban housing markets.

Ownership category

akta.pro rank

Product category

Modular Construction Services

NAICS

New Multifamily Housing Construction (except For-Sale Builders) (236116), Architectural and Structural Metals Manufacturing (3323)

SIC

Prefabricated Wood Bldgs & Components (2452), Fabricated Structural Metal Products (3440)

akta.pro primary industry

Residential Modular & Prefabricated Home Construction (IMAFABAF)

akta.pro secondary industries

Modular/Offsite General Contracting & Installation (IMAFAAAK), ADU Modular/Prefab ADU Procurement & Installation (HSAPAMAL), ADU Project Management & General Contracting (HSAPAMAO)

Keywords

• Modular construction
• High-rise buildings
• Prefabricated housing
• Sustainable construction
• Volumetric modular

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Modular Building Construction: Assembly OSM generates revenue through designing, engineering, and constructing modular buildings for developers and builders. The company delivers turnkey solutions for the next generation of buildings at market-competitive cost in 60% of the time. Revenue is derived from project-based construction contracts for multifamily residential and other building typologies.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Assembly OSM designs, engineers, and constructs modular high-rise buildings for developers and builders using a proprietary volumetric modular system assembled from subassemblies sourced through a distributed supply chain of expert fabricators. The platform delivers multifamily, affordable, student, hospitality, education, and accessory dwelling unit buildings at market-competitive cost in approximately 60% of conventional construction time, with Passive House and WELL for Residential certification built into the design.

Product overview

Assembly OSM offers a modular construction platform that serves as a turnkey solution for the next generation of sustainable buildings. The platform comprises the core Assembly OSM Modular Construction Platform along with specific building projects including Prototype Alpha (completed proof-of-concept one-bedroom unit), 147 St. Felix (3-story Passive House modular building in Brooklyn), and 247 E 117th Street (15-story, 51-unit Passive House-ready building in East Harlem). The system enables combination of modular units where one mod makes a studio, two makes a one bedroom, and three makes a two bedroom, with module sizes custom per project for endless customization. The platform delivers buildings in 60% of traditional construction time at market-competitive cost.

Differentiator

Problem solved

Functional benefit

Products and services

• Assembly OSM Modular Construction Platform

Quantifiable outcome

• 60% reduction in construction time
• +6 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Advanced Building Construction Collaborative (ABC Collaborative)coreStrategic or Co-development PartnerAssembly is a member of the ABC Collaborative, a group committed to reducing energy and greenhouse gas emissions through cost-effective, efficient building techniques and materials. Assembly is working with like-minded companies to move the industry forward.
• IMPELminorStrategic or Co-development PartnerAssembly is a participant in IMPEL, a Department of Energy tech-to-market program focused on building technologies, funded by the Building Technologies Office and implemented by Lawrence Berkeley National Laboratory.
• GRESBcoreStrategic or Co-development PartnerAssembly is a proud partner and solutions provider to GRESB, an international organization providing validated ESG performance data and benchmarking for real estate assets.
• University of Maine Advanced Structures and Composites CenterminorStrategic or Co-development PartnerAssembly and SHoP Architects are actively conducting research with the University of Maine Advanced Structures and Composites Center on several additive manufacturing and biobased materials for use in construction.
• NYC AcceleratorminorStrategic or Co-development PartnerAssembly OSM utilizes NYC Accelerator's resources and network, given their shared aim to enable energy-efficient, low-carbon buildings for New York City.
• IWBI (International WELL Building Institute)coreStrategic or Co-development PartnerAssembly is a proud early adopter of IWBI's WELL for Residential program, which reaffirms their commitment to supporting health and wellbeing through building design and performance.
• PHIUS (Passive House Institute US)coreStrategic or Co-development PartnerAssembly's first two projects are pursuing Passive House (PHIUS) certification to verify their outstanding energy efficiency through passive design strategies.
• AIA (American Institute of Architects)coreStrategic or Co-development PartnerAssembly is a signatory of the AIA 2030 Commitment and is dedicated to reaching carbon neutrality by 2030 across their projects.

Scale indicators10 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Boxabl: Boxabl manufactures factory-built modular homes that fold into shipping containers for transport. Directly comparable as a volumetric modular construction company focused on residential buildings, though focused on single-family rather than high-rise multifamily.
• Plant Prefab: Plant Prefab is a prefabricated home builder using sustainable materials and factory-built modules for custom residential projects. Closely comparable to Assembly's model of factory-built sustainable residential buildings.
• Factory_OS: Factory_OS (founded by former Google X lead) develops software-driven modular construction for multifamily housing. Directly comparable as a technology-enabled modular construction platform targeting developers.
• Katerra: Katerra was a vertically integrated modular construction company that filed for bankruptcy in 2021. Assembly OSM explicitly differentiates from Katerra's failed model, making it the most directly comparable (though defunct) peer.
• BLOKABLE: BLOKABLE produces factory-built modular housing units designed for multifamily and accessory dwelling unit applications. Comparable as a modular construction startup targeting developers and housing providers.
• Mighty Buildings: Mighty Buildings uses 3D printing and modular techniques to produce factory-built, sustainable homes with low carbon footprint. Comparable as a tech-enabled sustainable modular construction company.
• Dvele: Dvele designs and manufactures net-zero, health-focused modular smart homes using factory automation. Comparable as a sustainable, technology-driven modular home manufacturer targeting premium residential markets.
• Stack Modular: Stack Modular is a Canadian-based volumetric modular manufacturer focused on multifamily residential, hotel, and student housing. Comparable as a high-rise modular construction company targeting similar building typologies.

Emerging players

• Modulous: Modulous provides a software platform and kit-of-parts for assembling modular housing without owning factories. Comparable to Assembly's distributed supply chain approach, though Modulous is more software-focused.

Others

• SHoP Architects: SHoP Architects is a major New York architecture firm that collaborated with Assembly OSM on the 247 E 117th Street project and the University of Maine research partnership. Adjacent design partner rather than direct competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/AssemblyOSM

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds2 records

Investors15 records

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 Assembly OSM